PDB Short entry for 3MXH
HEADER    RNA BINDING PROTEIN/RNA                 07-MAY-10   3MXH              
TITLE     NATIVE STRUCTURE OF A C-DI-GMP RIBOSWITCH FROM V. CHOLERAE            
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A;                      
COMPND   3 CHAIN: P;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 1-98;                                         
COMPND   5 SYNONYM: U1 SNRNP A, U1-A, U1A;                                      
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES;                                                       
COMPND   8 MOL_ID: 2;                                                           
COMPND   9 MOLECULE: C-DI-GMP RIBOSWITCH;                                       
COMPND  10 CHAIN: R;                                                            
COMPND  11 ENGINEERED: YES                                                      
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: 511693;                                     
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21;                                      
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET11;                                    
SOURCE  11 MOL_ID: 2;                                                           
SOURCE  12 SYNTHETIC: YES;                                                      
SOURCE  13 OTHER_DETAILS: IN VITRO TRANSCRIBED FROM LINEAR DNA                  
KEYWDS    RNA, RIBOSWITCH, C-DI-GMP, RNA BINDING PROTEIN-RNA COMPLEX            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.A.STROBEL,K.D.SMITH                                                 
REVDAT   3   06-SEP-23 3MXH    1       REMARK SEQADV HETSYN LINK                
REVDAT   2   22-SEP-10 3MXH    1       JRNL                                     
REVDAT   1   25-AUG-10 3MXH    0                                                
JRNL        AUTH   K.D.SMITH,S.V.LIPCHOCK,A.L.LIVINGSTON,C.A.SHANAHAN,          
JRNL        AUTH 2 S.A.STROBEL                                                  
JRNL        TITL   STRUCTURAL AND BIOCHEMICAL DETERMINANTS OF LIGAND BINDING BY 
JRNL        TITL 2 THE C-DI-GMP RIBOSWITCH .                                    
JRNL        REF    BIOCHEMISTRY                  V.  49  7351 2010              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   20690679                                                     
JRNL        DOI    10.1021/BI100671E                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.30 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.5.0102                                      
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.34                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 97.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 15201                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.203                           
REMARK   3   R VALUE            (WORKING SET) : 0.202                           
REMARK   3   FREE R VALUE                     : 0.239                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 816                             
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.30                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.36                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1019                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 90.66                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.4650                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 49                           
REMARK   3   BIN FREE R VALUE                    : 0.4130                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 712                                     
REMARK   3   NUCLEIC ACID ATOMS       : 1984                                    
REMARK   3   HETEROGEN ATOMS          : 51                                      
REMARK   3   SOLVENT ATOMS            : 169                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 62.40                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 70.32                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 2.92000                                              
REMARK   3    B22 (A**2) : -0.50000                                             
REMARK   3    B33 (A**2) : -1.98000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 3.33000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): NULL          
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.247         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.204         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 17.433        
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.963                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.947                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  3020 ; 0.006 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  4567 ; 0.936 ; 2.777       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):    86 ; 5.313 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):    34 ;37.972 ;23.235       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   144 ;14.270 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     6 ;17.356 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   573 ; 0.046 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1519 ; 0.003 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):   434 ; 0.918 ; 5.000       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):   703 ; 1.576 ;10.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  2586 ; 1.382 ; 5.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  3863 ; 2.122 ;10.000       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 5                                          
REMARK   3                                                                      
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   R     8        R    20                          
REMARK   3    ORIGIN FOR THE GROUP (A): -14.2399  -4.3803  22.3020              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.4632 T22:   0.2931                                     
REMARK   3      T33:   0.1569 T12:   0.0199                                     
REMARK   3      T13:   0.1601 T23:   0.0195                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:  17.1276 L22:   7.0041                                     
REMARK   3      L33:   7.0560 L12:   2.5107                                     
REMARK   3      L13:   1.1895 L23:  -1.9606                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.1639 S12:  -0.8546 S13:  -0.5377                       
REMARK   3      S21:   0.8490 S22:  -0.1776 S23:   0.4128                       
REMARK   3      S31:   0.0910 S32:  -0.3856 S33:   0.0137                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 2                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   R    21        R    65                          
REMARK   3    ORIGIN FOR THE GROUP (A):  -2.2192  -1.7566  -6.0709              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.2817 T22:   0.1041                                     
REMARK   3      T33:   0.1784 T12:   0.0457                                     
REMARK   3      T13:  -0.0720 T23:   0.0279                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.2231 L22:   2.5465                                     
REMARK   3      L33:   2.2971 L12:   0.7402                                     
REMARK   3      L13:  -1.4779 L23:  -0.0342                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.0468 S12:   0.4048 S13:  -0.0374                       
REMARK   3      S21:  -0.4174 S22:   0.0628 S23:   0.1106                       
REMARK   3      S31:  -0.0508 S32:  -0.2331 S33:  -0.0160                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 3                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   R    75        R    98                          
REMARK   3    ORIGIN FOR THE GROUP (A): -15.0206  -4.0060   2.9990              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.2549 T22:   0.2456                                     
REMARK   3      T33:   0.3190 T12:   0.0814                                     
REMARK   3      T13:   0.0189 T23:   0.0222                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.0878 L22:   2.3987                                     
REMARK   3      L33:   5.0541 L12:   0.7014                                     
REMARK   3      L13:   0.6373 L23:  -0.4760                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.0147 S12:   0.2956 S13:   0.0208                       
REMARK   3      S21:  -0.1695 S22:   0.0196 S23:   0.3893                       
REMARK   3      S31:  -0.3833 S32:  -0.6250 S33:  -0.0049                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 4                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   R   660        R   669                          
REMARK   3    ORIGIN FOR THE GROUP (A): -17.7168  10.0842 -32.7336              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.3427 T22:   0.5249                                     
REMARK   3      T33:   1.1319 T12:   0.0481                                     
REMARK   3      T13:  -0.0876 T23:  -0.0748                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   9.2811 L22:   3.3611                                     
REMARK   3      L33:   5.4248 L12:   2.4823                                     
REMARK   3      L13:  -3.6152 L23:  -4.2577                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.9414 S12:  -0.0554 S13:   1.7623                       
REMARK   3      S21:   0.2947 S22:   0.4019 S23:   1.1096                       
REMARK   3      S31:  -0.4251 S32:  -0.3753 S33:  -1.3432                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 5                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   P     7        P    93                          
REMARK   3    ORIGIN FOR THE GROUP (A):  -7.0168  16.3283 -40.3012              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.2482 T22:   0.3578                                     
REMARK   3      T33:   0.7960 T12:   0.0520                                     
REMARK   3      T13:  -0.0008 T23:   0.0215                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   8.5598 L22:  26.6322                                     
REMARK   3      L33:  10.8829 L12:   1.6941                                     
REMARK   3      L13:  -1.4201 L23:  -7.7860                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.5642 S12:   0.5106 S13:   1.8324                       
REMARK   3      S21:  -0.9445 S22:  -0.0686 S23:   0.4835                       
REMARK   3      S31:  -0.6197 S32:   0.2963 S33:  -0.4956                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 3MXH COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 11-MAY-10.                  
REMARK 100 THE DEPOSITION ID IS D_1000059116.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 26-AUG-09                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 6.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X29A                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.1                                
REMARK 200  MONOCHROMATOR                  : SAGITALLY FOCUSED SI(111)          
REMARK 200  OPTICS                         : VERTICALLY FOCUSING MIRROR         
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-2000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 15201                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.300                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 80.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.4                               
REMARK 200  DATA REDUNDANCY                : 5.300                              
REMARK 200  R MERGE                    (I) : 0.07300                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 14.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.30                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.40                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 89.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 4.40                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.52800                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.100                              
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 3IRW                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 44.71                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.22                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 22% PEG550MME, 50 MM MES, PH 6.0, 5 MM   
REMARK 280  MGSO4, 300 MM NACL, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE      
REMARK 280  298K                                                                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-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   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       22.82600            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 3810 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 19250 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -40.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: P, R                                  
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 P     1                                                      
REMARK 465     ALA P     2                                                      
REMARK 465     VAL P     3                                                      
REMARK 465     PRO P     4                                                      
REMARK 465     GLU P     5                                                      
REMARK 465     THR P     6                                                      
REMARK 465     ILE P    94                                                      
REMARK 465     ALA P    95                                                      
REMARK 465     LYS P    96                                                      
REMARK 465     MET P    97                                                      
REMARK 465     LYS P    98                                                      
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      A R  48   O4' -  C1' -  N9  ANGL. DEV. =   6.2 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    THR P  89      115.32   -165.90                                   
REMARK 500    SER P  91      -91.60    -77.07                                   
REMARK 500    ASP P  92     -126.61     42.63                                   
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 P  99  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH P 109   O                                                      
REMARK 620 2 HOH P 110   O   179.9                                              
REMARK 620 3 HOH P 111   O    89.9  89.9                                        
REMARK 620 4 HOH P 112   O    90.0  90.1 179.8                                  
REMARK 620 5 HOH P 113   O    90.0  90.0  90.0  90.2                            
REMARK 620 6 HOH P 114   O    90.1  89.9  90.1  89.7 179.9                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG R   2  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH R 734   O                                                      
REMARK 620 2 HOH R 735   O   179.7                                              
REMARK 620 3 HOH R 736   O    89.9  90.4                                        
REMARK 620 4 HOH R 737   O    90.0  89.7 179.7                                  
REMARK 620 5 HOH R 738   O    89.9  90.1  90.1  90.1                            
REMARK 620 6 HOH R 739   O    90.5  89.6  89.7  90.0 179.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG R   4  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH R 100   O                                                      
REMARK 620 2 HOH R 161   O    67.9                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG R   5  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G R  42   O6                                                     
REMARK 620 2 HOH R 740   O    83.8                                              
REMARK 620 3 HOH R 741   O    96.2 179.8                                        
REMARK 620 4 HOH R 742   O    82.7  90.4  89.8                                  
REMARK 620 5 HOH R 743   O    96.5  89.5  90.4 179.3                            
REMARK 620 6 HOH R 744   O   170.1  90.0  90.0  89.6  91.2                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG R 670  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A R  48   OP2                                                    
REMARK 620 2 HOH R 729   O   158.8                                              
REMARK 620 3 HOH R 730   O   110.5  90.4                                        
REMARK 620 4 HOH R 731   O    69.9  89.1 179.5                                  
REMARK 620 5 HOH R 732   O    88.0  88.9  89.5  90.4                            
REMARK 620 6 HOH R 733   O    92.6  90.6  90.3  89.8 179.4                      
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 P 99                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE C2E R 1                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG R 670                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG R 2                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG R 4                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG R 5                    
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 3MUM   RELATED DB: PDB                                   
REMARK 900 STRUCTURE OF THE G20A MUTANT C-DI-GMP RIBOSWITH BOUND TO C-DI-GMP    
REMARK 900 RELATED ID: 3MUR   RELATED DB: PDB                                   
REMARK 900 STRUCTURE OF THE C92U MUTANT C-DI-GMP RIBOSWITH BOUND TO C-DI-GMP    
REMARK 900 RELATED ID: 3MUT   RELATED DB: PDB                                   
REMARK 900 STRUCTURE OF THE G20A/C92U MUTANT C-DI-GMP RIBOSWITH BOUND TO C-DI-  
REMARK 900 GMP                                                                  
REMARK 900 RELATED ID: 3MUV   RELATED DB: PDB                                   
REMARK 900 STRUCTURE OF THE G20A/C92U MUTANT C-DI-GMP RIBOSWITH BOUND TO C-DI-  
REMARK 900 AMP                                                                  
REMARK 900 RELATED ID: 3IRW   RELATED DB: PDB                                   
REMARK 900 THE ORIGINAL REPORT OF THE STRUCTURE OF THIS RIBOSWITCH (WILD-TYPE)  
DBREF  3MXH P    1    98  UNP    P09012   SNRPA_HUMAN      1     98             
DBREF  3MXH R    8    98  PDB    3MXH     3MXH             8     98             
SEQADV 3MXH HIS P   31  UNP  P09012    TYR    31 ENGINEERED MUTATION            
SEQADV 3MXH ARG P   36  UNP  P09012    GLN    36 ENGINEERED MUTATION            
SEQRES   1 P   98  MET ALA VAL PRO GLU THR ARG PRO ASN HIS THR ILE TYR          
SEQRES   2 P   98  ILE ASN ASN LEU ASN GLU LYS ILE LYS LYS ASP GLU LEU          
SEQRES   3 P   98  LYS LYS SER LEU HIS ALA ILE PHE SER ARG PHE GLY GLN          
SEQRES   4 P   98  ILE LEU ASP ILE LEU VAL SER ARG SER LEU LYS MET ARG          
SEQRES   5 P   98  GLY GLN ALA PHE VAL ILE PHE LYS GLU VAL SER SER ALA          
SEQRES   6 P   98  THR ASN ALA LEU ARG SER MET GLN GLY PHE PRO PHE TYR          
SEQRES   7 P   98  ASP LYS PRO MET ARG ILE GLN TYR ALA LYS THR ASP SER          
SEQRES   8 P   98  ASP ILE ILE ALA LYS MET LYS                                  
SEQRES   1 R   92  GTP   G   U   C   A   C   G   C   A   C   A   G   G          
SEQRES   2 R   92    G   C   A   A   A   C   C   A   U   U   C   G   A          
SEQRES   3 R   92    A   A   G   A   G   U   G   G   G   A   C   G   C          
SEQRES   4 R   92    A   A   A   G   C   C   U   C   C   G   G   C   C          
SEQRES   5 R   92    U   A   A   A   C   C   A   U   U   G   C   A   C          
SEQRES   6 R   92    U   C   C   G   G   U   A   G   G   U   A   G   C          
SEQRES   7 R   92    G   G   G   G   U   U   A   C   C   G   A   U   G          
SEQRES   8 R   92    G                                                          
MODRES 3MXH GTP R    8    G  GUANOSINE-5'-TRIPHOSPHATE                          
HET    GTP  R   8      32                                                       
HET     MG  P  99       1                                                       
HET    C2E  R   1      46                                                       
HET     MG  R 670       1                                                       
HET     MG  R   2       1                                                       
HET     MG  R   4       1                                                       
HET     MG  R   5       1                                                       
HETNAM     GTP GUANOSINE-5'-TRIPHOSPHATE                                        
HETNAM      MG MAGNESIUM ION                                                    
HETNAM     C2E 9,9'-[(2R,3R,3AS,5S,7AR,9R,10R,10AS,12S,14AR)-3,5,10,            
HETNAM   2 C2E  12-TETRAHYDROXY-5,12-DIOXIDOOCTAHYDRO-2H,7H-DIFURO[3,           
HETNAM   3 C2E  2-D:3',2'-J][1,3,7,9,2,                                         
HETNAM   4 C2E  8]TETRAOXADIPHOSPHACYCLODODECINE-2,9-DIYL]BIS(2-AMINO-          
HETNAM   5 C2E  1,9-DIHYDRO-6H-PURIN-6-ONE)                                     
HETSYN     C2E C-DI-GMP; CYCLIC DIGUANOSINE MONOPHOSPHATE                       
FORMUL   2  GTP    C10 H16 N5 O14 P3                                            
FORMUL   3   MG    5(MG 2+)                                                     
FORMUL   4  C2E    C20 H24 N10 O14 P2                                           
FORMUL   9  HOH   *169(H2 O)                                                    
HELIX    1   1 LYS P   22  SER P   35  1                                  14    
HELIX    2   2 GLU P   61  MET P   72  1                                  12    
SHEET    1   A 4 ILE P  40  LEU P  44  0                                        
SHEET    2   A 4 ALA P  55  PHE P  59 -1  O  ILE P  58   N  LEU P  41           
SHEET    3   A 4 THR P  11  ASN P  15 -1  N  ILE P  14   O  ALA P  55           
SHEET    4   A 4 ARG P  83  TYR P  86 -1  O  GLN P  85   N  TYR P  13           
SHEET    1   B 2 PRO P  76  PHE P  77  0                                        
SHEET    2   B 2 LYS P  80  PRO P  81 -1  O  LYS P  80   N  PHE P  77           
LINK         O3' GTP R   8                 P     G R   9     1555   1555  1.61  
LINK        MG    MG P  99                 O   HOH P 109     1555   1555  2.18  
LINK        MG    MG P  99                 O   HOH P 110     1555   1555  2.18  
LINK        MG    MG P  99                 O   HOH P 111     1555   1555  2.18  
LINK        MG    MG P  99                 O   HOH P 112     1555   1555  2.18  
LINK        MG    MG P  99                 O   HOH P 113     1555   1555  2.18  
LINK        MG    MG P  99                 O   HOH P 114     1555   1555  2.18  
LINK        MG    MG R   2                 O   HOH R 734     1555   1555  2.19  
LINK        MG    MG R   2                 O   HOH R 735     1555   1555  2.18  
LINK        MG    MG R   2                 O   HOH R 736     1555   1555  2.18  
LINK        MG    MG R   2                 O   HOH R 737     1555   1555  2.18  
LINK        MG    MG R   2                 O   HOH R 738     1555   1555  2.18  
LINK        MG    MG R   2                 O   HOH R 739     1555   1555  2.17  
LINK        MG    MG R   4                 O   HOH R 100     1555   1555  2.21  
LINK        MG    MG R   4                 O   HOH R 161     1555   1555  2.42  
LINK        MG    MG R   5                 O6    G R  42     1555   1555  2.40  
LINK        MG    MG R   5                 O   HOH R 740     1555   1555  2.18  
LINK        MG    MG R   5                 O   HOH R 741     1555   1555  2.18  
LINK        MG    MG R   5                 O   HOH R 742     1555   1555  2.18  
LINK        MG    MG R   5                 O   HOH R 743     1555   1555  2.18  
LINK        MG    MG R   5                 O   HOH R 744     1555   1555  2.18  
LINK         OP2   A R  48                MG    MG R 670     1555   1555  2.18  
LINK        MG    MG R 670                 O   HOH R 729     1555   1555  2.18  
LINK        MG    MG R 670                 O   HOH R 730     1555   1555  2.18  
LINK        MG    MG R 670                 O   HOH R 731     1555   1555  2.18  
LINK        MG    MG R 670                 O   HOH R 732     1555   1555  2.18  
LINK        MG    MG R 670                 O   HOH R 733     1555   1555  2.18  
SITE     1 AC1  7 ARG P  70  HOH P 109  HOH P 110  HOH P 111                    
SITE     2 AC1  7 HOH P 112  HOH P 113  HOH P 114                               
SITE     1 AC2 23  MG R   2    G R  14    A R  16    C R  17                    
SITE     2 AC2 23   A R  18    G R  20    G R  21    C R  46                    
SITE     3 AC2 23   A R  47    A R  48    A R  49    C R  92                    
SITE     4 AC2 23   C R  93  HOH R 140  HOH R 671  HOH R 673                    
SITE     5 AC2 23 HOH R 676  HOH R 687  HOH R 717  HOH R 732                    
SITE     6 AC2 23 HOH R 734  HOH R 736  HOH R 738                               
SITE     1 AC3  7   A R  47    A R  48  HOH R 729  HOH R 730                    
SITE     2 AC3  7 HOH R 731  HOH R 732  HOH R 733                               
SITE     1 AC4  7 C2E R   1  HOH R 734  HOH R 735  HOH R 736                    
SITE     2 AC4  7 HOH R 737  HOH R 738  HOH R 739                               
SITE     1 AC5  4 HOH R  70    U R  81  HOH R 100  HOH R 161                    
SITE     1 AC6  6   G R  42  HOH R 740  HOH R 741  HOH R 742                    
SITE     2 AC6  6 HOH R 743  HOH R 744                                          
CRYST1   50.243   45.652   80.248  90.00  93.74  90.00 P 1 21 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      0.019903  0.000000  0.001300        0.00000                         
SCALE2      0.000000  0.021905  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012488        0.00000