PDB Short entry for 3R1L
HEADER    RNA BINDING PROTEIN/RNA                 10-MAR-11   3R1L              
TITLE     CRYSTAL STRUCTURE OF THE CLASS I LIGASE RIBOZYME-SUBSTRATE PRELIGATION
TITLE    2 COMPLEX, C47U MUTANT, MG2+ BOUND                                     
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A;                      
COMPND   3 CHAIN: A, D;                                                         
COMPND   4 FRAGMENT: RNA BINDING DOMAIN (UNP RESIDUES 1-98);                    
COMPND   5 SYNONYM: U1A, U1 SNRNP A, U1-A;                                      
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES;                                                       
COMPND   8 MOL_ID: 2;                                                           
COMPND   9 MOLECULE: 5'-R(*UP*CP*CP*AP*GP*UP*A)-3';                             
COMPND  10 CHAIN: B, E;                                                         
COMPND  11 ENGINEERED: YES;                                                     
COMPND  12 OTHER_DETAILS: LIGASE SUBSTRATE;                                     
COMPND  13 MOL_ID: 3;                                                           
COMPND  14 MOLECULE: CLASS I LIGASE RIBOZYME;                                   
COMPND  15 CHAIN: C, F;                                                         
COMPND  16 ENGINEERED: YES;                                                     
COMPND  17 MUTATION: YES;                                                       
COMPND  18 OTHER_DETAILS: UNLIGATED C47U MUTANT                                 
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: SNRPA;                                                         
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: P11U1ADB;                                 
SOURCE  11 MOL_ID: 2;                                                           
SOURCE  12 SYNTHETIC: YES;                                                      
SOURCE  13 MOL_ID: 3;                                                           
SOURCE  14 SYNTHETIC: YES;                                                      
SOURCE  15 OTHER_DETAILS: RNA WAS PREPARED BY IN VITRO TRANSCRIPTION WITH T7    
SOURCE  16 RNA POLYMERASE FROM LINEARIZED PLASMID P307HU_C47U                   
KEYWDS    LIGASE RIBOZYME, CATALYTIC RNA, RIBOZYME, RNA BINDING PROTEIN-RNA     
KEYWDS   2 COMPLEX                                                              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    D.M.SHECHNER,D.P.BARTEL                                               
REVDAT   5   13-SEP-23 3R1L    1       REMARK SEQADV LINK                       
REVDAT   4   08-NOV-17 3R1L    1       REMARK                                   
REVDAT   3   21-SEP-11 3R1L    1       JRNL                                     
REVDAT   2   07-SEP-11 3R1L    1       JRNL                                     
REVDAT   1   31-AUG-11 3R1L    0                                                
JRNL        AUTH   D.M.SHECHNER,D.P.BARTEL                                      
JRNL        TITL   THE STRUCTURAL BASIS OF RNA-CATALYZED RNA POLYMERIZATION.    
JRNL        REF    NAT.STRUCT.MOL.BIOL.          V.  18  1036 2011              
JRNL        REFN                   ISSN 1545-9993                               
JRNL        PMID   21857665                                                     
JRNL        DOI    10.1038/NSMB.2107                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    3.13 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX                                               
REMARK   3   AUTHORS     : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN            
REMARK   3               : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE,           
REMARK   3               : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER,            
REMARK   3               : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY,              
REMARK   3               : REETAL PAI,RANDY READ,JANE RICHARDSON,               
REMARK   3               : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI,           
REMARK   3               : NICHOLAS SAUTER,JACOB SMITH,LAURENT                  
REMARK   3               : STORONI,TOM TERWILLIGER,PETER ZWART                  
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : ML                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 3.13                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 37.91                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 18730                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.197                           
REMARK   3   FREE R VALUE                     : 0.240                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.150                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 964                             
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (IN BINS).                           
REMARK   3   BIN  RESOLUTION RANGE  COMPL.    NWORK NFREE   RWORK  RFREE        
REMARK   3     1 37.9101 - 10.2518    0.93      484     0  0.1872 0.0000        
REMARK   3     2 10.2518 -  8.1638    0.95      508     0  0.2003 0.0000        
REMARK   3     3  8.1638 -  7.1397    0.96      497     0  0.1947 0.0000        
REMARK   3     4  7.1397 -  6.4905    0.96      510     0  0.2095 0.0000        
REMARK   3     5  6.4905 -  6.0272    0.95      497     0  0.2094 0.0000        
REMARK   3     6  6.0272 -  5.6731    0.94      501     0  0.1905 0.0000        
REMARK   3     7  5.6731 -  5.3898    0.95      487     0  0.1783 0.0000        
REMARK   3     8  5.3898 -  5.1558    0.94      528     0  0.1928 0.0000        
REMARK   3     9  5.1558 -  4.9578    0.94      482     0  0.1980 0.0000        
REMARK   3    10  4.9578 -  4.7870    0.95      499     0  0.2095 0.0000        
REMARK   3    11  4.7870 -  4.6376    0.95      499     0  0.1800 0.0000        
REMARK   3    12  4.6376 -  4.5053    0.93      489     0  0.1801 0.0000        
REMARK   3    13  4.5053 -  4.3868    0.94      501     0  0.1748 0.0000        
REMARK   3    14  4.3868 -  4.2800    0.95      507     0  0.1636 0.0000        
REMARK   3    15  4.2800 -  4.1828    0.95      481     0  0.1844 0.0000        
REMARK   3    16  4.1828 -  4.0939    0.93      505     0  0.1803 0.0000        
REMARK   3    17  4.0939 -  4.0121    0.94      483     0  0.1702 0.0000        
REMARK   3    18  4.0121 -  3.9364    0.94      498     0  0.1649 0.0000        
REMARK   3    19  3.9364 -  3.8662    0.94      502     0  0.1891 0.0000        
REMARK   3    20  3.8662 -  3.8007    0.93      489     0  0.1809 0.0000        
REMARK   3    21  3.8007 -  3.7395    0.94      500     0  0.1912 0.0000        
REMARK   3    22  3.7395 -  3.6820    0.94      467     0  0.1874 0.0000        
REMARK   3    23  3.6820 -  3.6279    0.93      520     0  0.1958 0.0000        
REMARK   3    24  3.6279 -  3.5768    0.94      503     0  0.2110 0.0000        
REMARK   3    25  3.5768 -  3.5285    0.95      472     0  0.2228 0.0000        
REMARK   3    26  3.5285 -  3.4827    0.94      482     0  0.2126 0.0000        
REMARK   3    27  3.4827 -  3.4392    0.93      531     0  0.2091 0.0000        
REMARK   3    28  3.4392 -  3.3978    0.94      464     0  0.2331 0.0000        
REMARK   3    29  3.3978 -  3.3583    0.94      498     0  0.2355 0.0000        
REMARK   3    30  3.3583 -  3.3206    0.93      513     0  0.2545 0.0000        
REMARK   3    31  3.3206 -  3.2845    0.96      488     0  0.2241 0.0000        
REMARK   3    32  3.2845 -  3.2500    0.93      501     0  0.2253 0.0000        
REMARK   3    33  3.2500 -  3.2168    0.94      491     0  0.2346 0.0000        
REMARK   3    34  3.2168 -  3.1850    0.95      501     0  0.2316 0.0000        
REMARK   3    35  3.1850 -  3.1544    0.92      481     0  0.2609 0.0000        
REMARK   3    36  3.1544 -  3.1249    0.77      407     0  0.2550 0.0000        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : NULL                                          
REMARK   3   SOLVENT RADIUS     : NULL                                          
REMARK   3   SHRINKAGE RADIUS   : NULL                                          
REMARK   3   K_SOL              : 0.21                                          
REMARK   3   B_SOL              : 11.87                                         
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : NULL             
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : NULL             
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 76.20                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -1.29400                                             
REMARK   3    B22 (A**2) : -0.06200                                             
REMARK   3    B33 (A**2) : 1.35600                                              
REMARK   3    B12 (A**2) : -3.25100                                             
REMARK   3    B13 (A**2) : 7.46900                                              
REMARK   3    B23 (A**2) : -0.71900                                             
REMARK   3                                                                      
REMARK   3  TWINNING INFORMATION.                                               
REMARK   3   FRACTION: NULL                                                     
REMARK   3   OPERATOR: NULL                                                     
REMARK   3                                                                      
REMARK   3  DEVIATIONS FROM IDEAL VALUES.                                       
REMARK   3                 RMSD          COUNT                                  
REMARK   3   BOND      :  0.007            662                                  
REMARK   3   ANGLE     :  1.327           2668                                  
REMARK   3   CHIRALITY :  0.055            118                                  
REMARK   3   PLANARITY :  0.003             81                                  
REMARK   3   DIHEDRAL  : 20.197           2102                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  NCS DETAILS                                                         
REMARK   3   NUMBER OF NCS GROUPS : NULL                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 3R1L COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 11-MAR-11.                  
REMARK 100 THE DEPOSITION ID IS D_1000064374.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 08-AUG-09                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 24-ID-E                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9795                             
REMARK 200  MONOCHROMATOR                  : CRYSTAL                            
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO, HKL-2000                    
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK, HKL-2000                
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 18739                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 3.125                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 40.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.1                               
REMARK 200  DATA REDUNDANCY                : 7.200                              
REMARK 200  R MERGE                    (I) : 0.13500                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 6.5000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 3.15                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.20                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 5.40                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.46900                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER                                                
REMARK 200 STARTING MODEL: PDB ENTRY 3HHN                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 50.56                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.49                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 50 MM SODIUM CACODYLATE, PH 6.0, 20 MM   
REMARK 280  CALCIUM CHLORIDE, 10 MM STRONTIUM CHLORIDE, 1 MM SPERMINE, 26%      
REMARK 280  MPD, CRYSTALS WERE CRUSHED AND USED AS MICROSEEDING STOCKS,         
REMARK 280  CALCIUM CHLORIDE WAS REPLACED WITH MAGNESIUM CHLORIDE PRIOR TO      
REMARK 280  FREEZING, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 295K           
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1                              
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TRIMERIC                          
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TRIMERIC                   
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 6740 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 26800 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -201.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C                               
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TRIMERIC                          
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TRIMERIC                   
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 6470 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 26660 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -181.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: D, E, F                               
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     MET A     1                                                      
REMARK 465     ALA A     2                                                      
REMARK 465     VAL A     3                                                      
REMARK 465     PRO A     4                                                      
REMARK 465     GLU A     5                                                      
REMARK 465     THR A     6                                                      
REMARK 465     MET D     1                                                      
REMARK 465     ALA D     2                                                      
REMARK 465     VAL D     3                                                      
REMARK 465     PRO D     4                                                      
REMARK 465     GLU D     5                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     LYS A  20    CD   CE   NZ                                        
REMARK 470     LYS A  50    CE   NZ                                             
REMARK 470     LYS A  88    CG   CD   CE   NZ                                   
REMARK 470     LYS A  96    CG   CD   CE   NZ                                   
REMARK 470     LYS A  98    CG   CD   CE   NZ                                   
REMARK 470     LYS D  20    CD   CE   NZ                                        
REMARK 470     LYS D  23    CG   CD   CE   NZ                                   
REMARK 470     LYS D  88    CG   CD   CE   NZ                                   
REMARK 470     LYS D  96    CG   CD   CE   NZ                                   
REMARK 470     LYS D  98    CG   CD   CE   NZ                                   
REMARK 480                                                                      
REMARK 480 ZERO OCCUPANCY ATOM                                                  
REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO                  
REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS                
REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME;              
REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):         
REMARK 480   M RES C SSEQI ATOMS                                                
REMARK 480     LYS A   23   CD   CE   NZ                                        
REMARK 480     GLU A   25   CD   OE1  OE2                                       
REMARK 480     LYS A   28   CD   CE   NZ                                        
REMARK 480     GLN A   39   CG   CD   OE1  NE2                                  
REMARK 480     LYS A   60   CG   CD   CE   NZ                                   
REMARK 480     ARG A   70   CG   CD   NE   CZ   NH1  NH2                        
REMARK 480     ARG A   83   CG   CD   NE   CZ   NH1  NH2                        
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   O5'  GTP C     1     O    HOH C  1070              1.73            
REMARK 500   O5'  GTP F     1     O    HOH F  1059              1.76            
REMARK 500   O3B  GTP F     1     O    HOH F  1059              1.79            
REMARK 500   O3B  GTP C     1     O    HOH C  1070              1.92            
REMARK 500   O2'    A F    71     O    HOH F  1048              2.06            
REMARK 500   O2'    A C    71     O    HOH C  1054              2.11            
REMARK 500   O1A  GTP C     1     O    HOH C  1073              2.14            
REMARK 500   O    HOH F  1048     O    HOH F  1060              2.16            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500      A F  29   O5'     A F  29   C5'    -0.072                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500      C C  30   O4' -  C1' -  N1  ANGL. DEV. =  -5.0 DEGREES          
REMARK 500      G C  44   O4' -  C1' -  N9  ANGL. DEV. =   4.2 DEGREES          
REMARK 500      U C1012   C3' -  C2' -  C1' ANGL. DEV. =  -5.7 DEGREES          
REMARK 500      G C  74   C4' -  C3' -  C2' ANGL. DEV. =  -7.5 DEGREES          
REMARK 500      U C 106   C3' -  O3' -  P   ANGL. DEV. =   8.9 DEGREES          
REMARK 500    GTP F   1   C3' -  O3' -  P   ANGL. DEV. = -12.7 DEGREES          
REMARK 500      C F   5   O5' -  C5' -  C4' ANGL. DEV. =  -6.2 DEGREES          
REMARK 500      C F   5   C4' -  C3' -  C2' ANGL. DEV. =  -6.7 DEGREES          
REMARK 500      G F  28   C3' -  O3' -  P   ANGL. DEV. =  -8.2 DEGREES          
REMARK 500      A F  29   C5' -  C4' -  O4' ANGL. DEV. =  -8.5 DEGREES          
REMARK 500      A F  29   O4' -  C1' -  C2' ANGL. DEV. =  -6.1 DEGREES          
REMARK 500      A F  31   O4' -  C1' -  N9  ANGL. DEV. =   5.3 DEGREES          
REMARK 500      U F 116   O4' -  C1' -  N1  ANGL. DEV. =   4.5 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ARG A  36        4.48    -67.35                                   
REMARK 500    SER A  48      179.73    -52.54                                   
REMARK 500    PRO A  76       74.32    -68.21                                   
REMARK 500    LYS A  96       47.92    -85.02                                   
REMARK 500    MET A  97      -40.89   -151.55                                   
REMARK 500    ASN D  18      108.08    -51.75                                   
REMARK 500    SER D  48     -175.41    -55.24                                   
REMARK 500    PRO D  76       81.88    -62.50                                   
REMARK 500    LYS D  80      118.11   -162.14                                   
REMARK 500    LYS D  96       47.17    -90.56                                   
REMARK 500    MET D  97      -30.88   -151.67                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1041  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A B  -1   O3'                                                    
REMARK 620 2   A C  29   OP1 107.2                                              
REMARK 620 3   C C  30   OP2 143.9 105.9                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1020  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GTP C   1   O3G                                                    
REMARK 620 2   G C   2   O6   62.5                                              
REMARK 620 3 HOH C1048   O    99.5  82.1                                        
REMARK 620 4 HOH C1049   O   125.1 171.1  91.6                                  
REMARK 620 5 HOH C1050   O   143.4  84.7  91.1  89.1                            
REMARK 620 6 HOH C1051   O    78.9  96.4 178.2  90.1  89.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1034  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GTP C   1   O1B                                                    
REMARK 620 2 GTP C   1   O2B  66.7                                              
REMARK 620 3 HOH C1069   O    97.6  94.5                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1035  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GTP C   1   O1G                                                    
REMARK 620 2   U C   8   OP2  69.5                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1031  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A C   4   OP2                                                    
REMARK 620 2   A C 114   O2'  72.3                                              
REMARK 620 3   A C 115   OP2 172.6 105.5                                        
REMARK 620 4 HOH C1061   O    87.6  85.1  99.3                                  
REMARK 620 5 HOH C1062   O    88.4 159.5  94.5  87.2                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1019  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A C  31   OP2                                                    
REMARK 620 2   A C  32   OP2  90.0                                              
REMARK 620 3 HOH C1044   O    95.3  96.1                                        
REMARK 620 4 HOH C1045   O   171.8  93.9  91.5                                  
REMARK 620 5 HOH C1046   O    82.3 171.6  88.1  93.3                            
REMARK 620 6 HOH C1047   O    84.4  86.3 177.5  88.6  89.4                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1042  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A C  31   OP1                                                    
REMARK 620 2 HOH C1069   O   111.3                                              
REMARK 620 3 HOH C1073   O   126.5  82.7                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1021  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C C  70   OP1                                                    
REMARK 620 2   G C  72   OP2 103.7                                              
REMARK 620 3   U C 106   OP1 160.5  95.4                                        
REMARK 620 4 HOH C1052   O    88.9  90.1  87.1                                  
REMARK 620 5 HOH C1053   O    83.2 173.0  77.8  90.8                            
REMARK 620 6 HOH C1054   O    91.3  90.3  92.6 179.5  88.8                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1027  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH C1055   O                                                      
REMARK 620 2 HOH C1056   O    88.2                                              
REMARK 620 3 HOH C1057   O    90.4  91.2                                        
REMARK 620 4 HOH C1058   O   177.8  89.7  88.9                                  
REMARK 620 5 HOH C1059   O    89.6 177.8  88.5  92.4                            
REMARK 620 6 HOH C1060   O    90.4  89.2 179.2  90.4  91.2                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C1033  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH C1063   O                                                      
REMARK 620 2 HOH C1064   O    89.2                                              
REMARK 620 3 HOH C1065   O    90.5  90.9                                        
REMARK 620 4 HOH C1066   O   179.5  90.6  90.0                                  
REMARK 620 5 HOH C1067   O    90.3 179.5  89.1  89.9                            
REMARK 620 6 HOH C1068   O    90.1  88.9 179.4  89.4  91.1                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1020  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GTP F   1   O3G                                                    
REMARK 620 2   G F   2   O6   52.9                                              
REMARK 620 3 HOH F1044   O    94.9 102.9                                        
REMARK 620 4 HOH F1045   O   140.7  88.2  88.1                                  
REMARK 620 5 HOH F1046   O   128.1 166.5  90.6  91.0                            
REMARK 620 6 HOH F1047   O    84.7  76.9 179.5  92.3  89.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1033  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GTP F   1   O1B                                                    
REMARK 620 2 HOH F1058   O    88.2                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1028  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A F   4   OP1                                                    
REMARK 620 2   A F   6   OP2 149.9                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1019  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A F  31   OP2                                                    
REMARK 620 2   A F  32   OP2  90.0                                              
REMARK 620 3 HOH F1040   O    85.2  88.8                                        
REMARK 620 4 HOH F1041   O    65.0 154.7  93.0                                  
REMARK 620 5 HOH F1042   O   152.1 117.5  90.4  87.8                            
REMARK 620 6 HOH F1043   O    95.2  90.0 178.7  88.3  89.9                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1032  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C F  35   OP2                                                    
REMARK 620 2   U F  76   OP2 145.2                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1021  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C F  70   OP1                                                    
REMARK 620 2   G F  72   OP2 102.0                                              
REMARK 620 3   U F 106   OP1 151.4 106.6                                        
REMARK 620 4 HOH F1048   O    93.2  90.6  86.7                                  
REMARK 620 5 HOH F1049   O    72.2 173.6  79.2  87.0                            
REMARK 620 6 HOH F1050   O    90.4  90.8  89.1 175.8  92.1                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG F1031  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH F1052   O                                                      
REMARK 620 2 HOH F1053   O    90.8                                              
REMARK 620 3 HOH F1054   O    88.7  89.4                                        
REMARK 620 4 HOH F1055   O   179.2  89.9  91.2                                  
REMARK 620 5 HOH F1056   O    88.6 179.2  90.1  90.7                            
REMARK 620 6 HOH F1057   O    89.9  89.4 178.2  90.2  91.1                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1019                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1020                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1021                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1023                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1024                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1027                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1028                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1029                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1030                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1031                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1032                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1033                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1034                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1035                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1036                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1037                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1039                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1040                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1041                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 1042                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1019                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1020                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1021                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1024                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1026                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1027                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: CC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1028                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1029                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1030                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1031                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1032                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1033                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1034                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1036                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1037                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: DC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG F 1038                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 3HHN   RELATED DB: PDB                                   
REMARK 900 WILD TYPE RIBOZYME POSTLIGATION PRODUCT, BOUND TO U1A-RBD            
REMARK 900 RELATED ID: 3IVK   RELATED DB: PDB                                   
REMARK 900 WILD TYPE RIBOZYME POSTLIGATION PRODUCT, BOUND TO SYNTHETIC FAB      
REMARK 900 RELATED ID: 3R1H   RELATED DB: PDB                                   
REMARK 900 C47U MUTANT RIBOZYME PRECURSOR, BOUND TO CA2+ AND U1A-RBD            
DBREF  3R1L A    1    98  UNP    P09012   SNRPA_HUMAN      1     98             
DBREF  3R1L D    1    98  UNP    P09012   SNRPA_HUMAN      1     98             
DBREF  3R1L B   -7    -1  PDB    3R1L     3R1L            -7     -1             
DBREF  3R1L E   -7    -1  PDB    3R1L     3R1L            -7     -1             
DBREF  3R1L C    1   121  PDB    3R1L     3R1L             1    121             
DBREF  3R1L F    1   121  PDB    3R1L     3R1L             1    121             
SEQADV 3R1L HIS A   31  UNP  P09012    TYR    31 ENGINEERED MUTATION            
SEQADV 3R1L ARG A   36  UNP  P09012    GLN    36 ENGINEERED MUTATION            
SEQADV 3R1L HIS D   31  UNP  P09012    TYR    31 ENGINEERED MUTATION            
SEQADV 3R1L ARG D   36  UNP  P09012    GLN    36 ENGINEERED MUTATION            
SEQRES   1 A   98  MET ALA VAL PRO GLU THR ARG PRO ASN HIS THR ILE TYR          
SEQRES   2 A   98  ILE ASN ASN LEU ASN GLU LYS ILE LYS LYS ASP GLU LEU          
SEQRES   3 A   98  LYS LYS SER LEU HIS ALA ILE PHE SER ARG PHE GLY GLN          
SEQRES   4 A   98  ILE LEU ASP ILE LEU VAL SER ARG SER LEU LYS MET ARG          
SEQRES   5 A   98  GLY GLN ALA PHE VAL ILE PHE LYS GLU VAL SER SER ALA          
SEQRES   6 A   98  THR ASN ALA LEU ARG SER MET GLN GLY PHE PRO PHE TYR          
SEQRES   7 A   98  ASP LYS PRO MET ARG ILE GLN TYR ALA LYS THR ASP SER          
SEQRES   8 A   98  ASP ILE ILE ALA LYS MET LYS                                  
SEQRES   1 B    7    U   C   C   A   G   U   A                                  
SEQRES   1 C  130  GTP   G   A   A   C   A   C   U   A   U   A   C   U          
SEQRES   2 C  130    A   C   U   G   G   A   U   A   A   U   C   A   A          
SEQRES   3 C  130    A   G   A   C   A   A   A   U   C   U   G   C   C          
SEQRES   4 C  130    C   G   A   A   G   G   G   U   U   U   G   A   G          
SEQRES   5 C  130    A   A   C   A   U   A   C   C   C   A   U   U   G          
SEQRES   6 C  130    C   A   C   U   C   C   G   G   G   U   A   U   G          
SEQRES   7 C  130    C   A   G   A   G   G   U   G   G   C   A   G   C          
SEQRES   8 C  130    C   U   C   C   G   G   U   G   G   G   U   U   A          
SEQRES   9 C  130    A   A   A   C   C   C   A   A   C   G   U   U   C          
SEQRES  10 C  130    U   C   A   A   C   A   A   U   A   G   U   G A23          
SEQRES   1 D   98  MET ALA VAL PRO GLU THR ARG PRO ASN HIS THR ILE TYR          
SEQRES   2 D   98  ILE ASN ASN LEU ASN GLU LYS ILE LYS LYS ASP GLU LEU          
SEQRES   3 D   98  LYS LYS SER LEU HIS ALA ILE PHE SER ARG PHE GLY GLN          
SEQRES   4 D   98  ILE LEU ASP ILE LEU VAL SER ARG SER LEU LYS MET ARG          
SEQRES   5 D   98  GLY GLN ALA PHE VAL ILE PHE LYS GLU VAL SER SER ALA          
SEQRES   6 D   98  THR ASN ALA LEU ARG SER MET GLN GLY PHE PRO PHE TYR          
SEQRES   7 D   98  ASP LYS PRO MET ARG ILE GLN TYR ALA LYS THR ASP SER          
SEQRES   8 D   98  ASP ILE ILE ALA LYS MET LYS                                  
SEQRES   1 E    7    U   C   C   A   G   U   A                                  
SEQRES   1 F  130  GTP   G   A   A   C   A   C   U   A   U   A   C   U          
SEQRES   2 F  130    A   C   U   G   G   A   U   A   A   U   C   A   A          
SEQRES   3 F  130    A   G   A   C   A   A   A   U   C   U   G   C   C          
SEQRES   4 F  130    C   G   A   A   G   G   G   U   U   U   G   A   G          
SEQRES   5 F  130    A   A   C   A   U   A   C   C   C   A   U   U   G          
SEQRES   6 F  130    C   A   C   U   C   C   G   G   G   U   A   U   G          
SEQRES   7 F  130    C   A   G   A   G   G   U   G   G   C   A   G   C          
SEQRES   8 F  130    C   U   C   C   G   G   U   G   G   G   U   U   A          
SEQRES   9 F  130    A   A   A   C   C   C   A   A   C   G   U   U   C          
SEQRES  10 F  130    U   C   A   A   C   A   A   U   A   G   U   G A23          
MODRES 3R1L GTP C    1    G  GUANOSINE-5'-TRIPHOSPHATE                          
MODRES 3R1L A23 C  121    A                                                     
MODRES 3R1L GTP F    1    G  GUANOSINE-5'-TRIPHOSPHATE                          
MODRES 3R1L A23 F  121    A                                                     
HET    GTP  C   1      32                                                       
HET    A23  C 121      25                                                       
HET    GTP  F   1      32                                                       
HET    A23  F 121      25                                                       
HET     MG  C1019       1                                                       
HET     MG  C1020       1                                                       
HET     MG  C1021       1                                                       
HET     MG  C1022       1                                                       
HET     MG  C1023       1                                                       
HET     MG  C1024       1                                                       
HET     MG  C1025       1                                                       
HET     MG  C1026       1                                                       
HET     MG  C1027       1                                                       
HET     MG  C1028       1                                                       
HET     MG  C1029       1                                                       
HET     MG  C1030       1                                                       
HET     MG  C1031       1                                                       
HET     MG  C1032       1                                                       
HET     MG  C1033       1                                                       
HET     MG  C1034       1                                                       
HET     MG  C1035       1                                                       
HET     MG  C1036       1                                                       
HET     MG  C1037       1                                                       
HET     MG  C1038       1                                                       
HET     MG  C1039       1                                                       
HET     MG  C1040       1                                                       
HET     MG  C1041       1                                                       
HET     MG  C1042       1                                                       
HET     MG  C1043       1                                                       
HET     MG  F1019       1                                                       
HET     MG  F1020       1                                                       
HET     MG  F1021       1                                                       
HET     MG  F1022       1                                                       
HET     MG  F1023       1                                                       
HET     MG  F1024       1                                                       
HET     MG  F1025       1                                                       
HET     MG  F1026       1                                                       
HET     MG  F1027       1                                                       
HET     MG  F1028       1                                                       
HET     MG  F1029       1                                                       
HET     MG  F1030       1                                                       
HET     MG  F1031       1                                                       
HET     MG  F1032       1                                                       
HET     MG  F1033       1                                                       
HET     MG  F1034       1                                                       
HET     MG  F1035       1                                                       
HET     MG  F1036       1                                                       
HET     MG  F1037       1                                                       
HET     MG  F1038       1                                                       
HET     MG  F1039       1                                                       
HETNAM     GTP GUANOSINE-5'-TRIPHOSPHATE                                        
HETNAM     A23 ADENOSINE-5'-PHOSPHATE-2',3'-CYCLIC PHOSPHATE                    
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3  GTP    2(C10 H16 N5 O14 P3)                                         
FORMUL   3  A23    2(C10 H13 N5 O9 P2)                                          
FORMUL   7   MG    46(MG 2+)                                                    
FORMUL  53  HOH   *51(H2 O)                                                     
HELIX    1   1 LYS A   22  SER A   35  1                                  14    
HELIX    2   2 ARG A   36  GLY A   38  5                                   3    
HELIX    3   3 GLU A   61  GLN A   73  1                                  13    
HELIX    4   4 SER A   91  LYS A   96  1                                   6    
HELIX    5   5 LYS D   22  SER D   35  1                                  14    
HELIX    6   6 ARG D   36  GLY D   38  5                                   3    
HELIX    7   7 GLU D   61  GLN D   73  1                                  13    
HELIX    8   8 SER D   91  LYS D   96  1                                   6    
SHEET    1   A 4 ILE A  40  LEU A  44  0                                        
SHEET    2   A 4 ALA A  55  PHE A  59 -1  O  ILE A  58   N  ASP A  42           
SHEET    3   A 4 THR A  11  ASN A  15 -1  N  ILE A  14   O  ALA A  55           
SHEET    4   A 4 ARG A  83  TYR A  86 -1  O  GLN A  85   N  TYR A  13           
SHEET    1   B 4 ILE D  40  LEU D  44  0                                        
SHEET    2   B 4 GLN D  54  PHE D  59 -1  O  ILE D  58   N  ASP D  42           
SHEET    3   B 4 THR D  11  ASN D  15 -1  N  ILE D  12   O  VAL D  57           
SHEET    4   B 4 ARG D  83  TYR D  86 -1  O  GLN D  85   N  TYR D  13           
LINK         O3' GTP C   1                 P     G C   2     1555   1555  1.62  
LINK         O3'   G C 120                 P   A23 C 121     1555   1555  1.59  
LINK         O3' GTP F   1                 P     G F   2     1555   1555  1.62  
LINK         O3'   G F 120                 P   A23 F 121     1555   1555  1.60  
LINK         O3'   A B  -1                MG    MG C1041     1555   1555  2.70  
LINK         O3G GTP C   1                MG    MG C1020     1555   1555  2.70  
LINK         O1B GTP C   1                MG    MG C1034     1555   1555  2.04  
LINK         O2B GTP C   1                MG    MG C1034     1555   1555  2.54  
LINK         O1G GTP C   1                MG    MG C1035     1555   1555  2.27  
LINK         O6    G C   2                MG    MG C1020     1555   1555  2.30  
LINK         OP2   A C   4                MG    MG C1031     1555   1555  2.44  
LINK         OP2   U C   8                MG    MG C1035     1555   1555  2.94  
LINK         OP1   A C  29                MG    MG C1041     1555   1555  2.68  
LINK         OP2   C C  30                MG    MG C1041     1555   1555  2.72  
LINK         OP2   A C  31                MG    MG C1019     1555   1555  2.06  
LINK         OP1   A C  31                MG    MG C1042     1555   1555  2.22  
LINK         OP2   A C  32                MG    MG C1019     1555   1555  2.17  
LINK         O6    G C  41                MG    MG C1036     1555   1555  2.25  
LINK         OP1   A C  43                MG    MG C1037     1555   1555  2.68  
LINK         O4    U C  68                MG    MG C1028     1555   1555  3.00  
LINK         OP1   C C  70                MG    MG C1021     1555   1555  2.61  
LINK         OP2   G C  72                MG    MG C1021     1555   1555  2.64  
LINK         O4    U C  93                MG    MG C1040     1555   1555  2.45  
LINK         OP1   U C 106                MG    MG C1021     1555   1555  2.45  
LINK         O2'   A C 114                MG    MG C1031     1555   1555  2.71  
LINK         OP2   A C 115                MG    MG C1031     1555   1555  2.46  
LINK         OP1   C C1009                MG    MG C1039     1555   1555  2.26  
LINK        MG    MG C1019                 O   HOH C1044     1555   1555  2.07  
LINK        MG    MG C1019                 O   HOH C1045     1555   1555  2.07  
LINK        MG    MG C1019                 O   HOH C1046     1555   1555  2.07  
LINK        MG    MG C1019                 O   HOH C1047     1555   1555  2.06  
LINK        MG    MG C1020                 O   HOH C1048     1555   1555  2.07  
LINK        MG    MG C1020                 O   HOH C1049     1555   1555  2.07  
LINK        MG    MG C1020                 O   HOH C1050     1555   1555  2.07  
LINK        MG    MG C1020                 O   HOH C1051     1555   1555  2.07  
LINK        MG    MG C1021                 O   HOH C1052     1555   1555  2.06  
LINK        MG    MG C1021                 O   HOH C1053     1555   1555  2.07  
LINK        MG    MG C1021                 O   HOH C1054     1555   1555  2.06  
LINK        MG    MG C1023                 O   HOH C1072     1555   1555  2.76  
LINK        MG    MG C1027                 O   HOH C1055     1555   1555  2.07  
LINK        MG    MG C1027                 O   HOH C1056     1555   1555  2.06  
LINK        MG    MG C1027                 O   HOH C1057     1555   1555  2.07  
LINK        MG    MG C1027                 O   HOH C1058     1555   1555  2.08  
LINK        MG    MG C1027                 O   HOH C1059     1555   1555  2.07  
LINK        MG    MG C1027                 O   HOH C1060     1555   1555  2.07  
LINK        MG    MG C1031                 O   HOH C1061     1555   1555  2.06  
LINK        MG    MG C1031                 O   HOH C1062     1555   1555  2.06  
LINK        MG    MG C1033                 O   HOH C1063     1555   1555  2.07  
LINK        MG    MG C1033                 O   HOH C1064     1555   1555  2.07  
LINK        MG    MG C1033                 O   HOH C1065     1555   1555  2.08  
LINK        MG    MG C1033                 O   HOH C1066     1555   1555  2.07  
LINK        MG    MG C1033                 O   HOH C1067     1555   1555  2.07  
LINK        MG    MG C1033                 O   HOH C1068     1555   1555  2.07  
LINK        MG    MG C1034                 O   HOH C1069     1555   1555  2.07  
LINK        MG    MG C1042                 O   HOH C1069     1555   1555  2.83  
LINK        MG    MG C1042                 O   HOH C1073     1555   1555  2.39  
LINK         O3G GTP F   1                MG    MG F1020     1555   1555  2.86  
LINK         O1B GTP F   1                MG    MG F1033     1555   1555  2.06  
LINK         O1G GTP F   1                MG    MG F1034     1555   1555  1.81  
LINK         O6    G F   2                MG    MG F1020     1555   1555  2.37  
LINK         OP1   A F   4                MG    MG F1028     1555   1555  2.39  
LINK         OP2   A F   4                MG    MG F1029     1555   1555  2.65  
LINK         OP2   A F   6                MG    MG F1028     1555   1555  2.58  
LINK         O6    G F  28                MG    MG F1030     1555   1555  2.99  
LINK         OP2   C F  30                MG    MG F1038     1555   1555  2.26  
LINK         OP2   A F  31                MG    MG F1019     1555   1555  2.12  
LINK         OP2   A F  32                MG    MG F1019     1555   1555  2.09  
LINK         OP2   C F  35                MG    MG F1032     1555   1555  2.26  
LINK         OP2   A F  43                MG    MG F1036     1555   1555  2.63  
LINK         OP1   A F  43                MG    MG F1037     1555   1555  2.48  
LINK         OP1   C F  70                MG    MG F1021     1555   1555  2.58  
LINK         OP2   G F  72                MG    MG F1021     1555   1555  2.78  
LINK         OP2   U F  76                MG    MG F1032     1555   1555  2.71  
LINK         OP1   U F 106                MG    MG F1021     1555   1555  2.22  
LINK        MG    MG F1019                 O   HOH F1040     1555   1555  2.07  
LINK        MG    MG F1019                 O   HOH F1041     1555   1555  2.07  
LINK        MG    MG F1019                 O   HOH F1042     1555   1555  2.07  
LINK        MG    MG F1019                 O   HOH F1043     1555   1555  2.06  
LINK        MG    MG F1020                 O   HOH F1044     1555   1555  2.07  
LINK        MG    MG F1020                 O   HOH F1045     1555   1555  2.07  
LINK        MG    MG F1020                 O   HOH F1046     1555   1555  2.06  
LINK        MG    MG F1020                 O   HOH F1047     1555   1555  2.08  
LINK        MG    MG F1021                 O   HOH F1048     1555   1555  2.06  
LINK        MG    MG F1021                 O   HOH F1049     1555   1555  2.07  
LINK        MG    MG F1021                 O   HOH F1050     1555   1555  2.07  
LINK        MG    MG F1031                 O   HOH F1052     1555   1555  2.07  
LINK        MG    MG F1031                 O   HOH F1053     1555   1555  2.07  
LINK        MG    MG F1031                 O   HOH F1054     1555   1555  2.07  
LINK        MG    MG F1031                 O   HOH F1055     1555   1555  2.08  
LINK        MG    MG F1031                 O   HOH F1056     1555   1555  2.07  
LINK        MG    MG F1031                 O   HOH F1057     1555   1555  2.07  
LINK        MG    MG F1033                 O   HOH F1058     1555   1555  2.07  
SITE     1 AC1  6   A C  31    A C  32  HOH C1044  HOH C1045                    
SITE     2 AC1  6 HOH C1046  HOH C1047                                          
SITE     1 AC2  6 GTP C   1    G C   2  HOH C1048  HOH C1049                    
SITE     2 AC2  6 HOH C1050  HOH C1051                                          
SITE     1 AC3  7   C C  70    G C  72    U C 106  HOH C1052                    
SITE     2 AC3  7 HOH C1053  HOH C1054  HOH C1071                               
SITE     1 AC4  3   A C  95    A C  96  HOH C1072                               
SITE     1 AC5  1   A C  97                                                     
SITE     1 AC6  6 HOH C1055  HOH C1056  HOH C1057  HOH C1058                    
SITE     2 AC6  6 HOH C1059  HOH C1060                                          
SITE     1 AC7  1   U C  68                                                     
SITE     1 AC8  1   U C  47                                                     
SITE     1 AC9  2   G C  45    G F  45                                          
SITE     1 BC1  5   A C   4    A C 114    A C 115  HOH C1061                    
SITE     2 BC1  5 HOH C1062                                                     
SITE     1 BC2  1   A C1005                                                     
SITE     1 BC3  7   C C  70  HOH C1063  HOH C1064  HOH C1065                    
SITE     2 BC3  7 HOH C1066  HOH C1067  HOH C1068                               
SITE     1 BC4  3 GTP C   1    C C   7  HOH C1069                               
SITE     1 BC5  3 GTP C   1    G C   2    U C   8                               
SITE     1 BC6  3   C C  40    G C  41    G C  44                               
SITE     1 BC7  1   A C  43                                                     
SITE     1 BC8  1   C C1009                                                     
SITE     1 BC9  2   G C  92    U C  93                                          
SITE     1 CC1  4   A B  -1  GTP C   1    A C  29    C C  30                    
SITE     1 CC2  4   C C  30    A C  31  HOH C1069  HOH C1073                    
SITE     1 CC3  6   A F  31    A F  32  HOH F1040  HOH F1041                    
SITE     2 CC3  6 HOH F1042  HOH F1043                                          
SITE     1 CC4  6 GTP F   1    G F   2  HOH F1044  HOH F1045                    
SITE     2 CC4  6 HOH F1046  HOH F1047                                          
SITE     1 CC5  7   C F  70    A F  71    G F  72    U F 106                    
SITE     2 CC5  7 HOH F1048  HOH F1049  HOH F1050                               
SITE     1 CC6  1   G F  45                                                     
SITE     1 CC7  1   U F  68                                                     
SITE     1 CC8  1   U F  47                                                     
SITE     1 CC9  2   A F   4    A F   6                                          
SITE     1 DC1  2   A F   3    A F   4                                          
SITE     1 DC2  3   A F  26    G F  28    A F1005                               
SITE     1 DC3  6 HOH F1052  HOH F1053  HOH F1054  HOH F1055                    
SITE     2 DC3  6 HOH F1056  HOH F1057                                          
SITE     1 DC4  4   U F  34    C F  35    G F  75    U F  76                    
SITE     1 DC5  3 GTP F   1    C F   7  HOH F1058                               
SITE     1 DC6  2 GTP F   1    U F   8                                          
SITE     1 DC7  3   G F  41    A F  42    A F  43                               
SITE     1 DC8  1   A F  43                                                     
SITE     1 DC9  5   A E  -1  GTP F   1    A F  29    C F  30                    
SITE     2 DC9  5   U F  47                                                     
CRYST1   59.190   70.237   71.214  99.86  99.34 103.81 P 1           2          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.016895  0.004154  0.003780        0.00000                         
SCALE2      0.000000  0.014662  0.003292        0.00000                         
SCALE3      0.000000  0.000000  0.014585        0.00000