PDB Short entry for 1A4I
HEADER    OXIDOREDUCTASE                          30-JAN-98   1A4I              
TITLE     HUMAN TETRAHYDROFOLATE DEHYDROGENASE / CYCLOHYDROLASE                 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: METHYLENETETRAHYDROFOLATE DEHYDROGENASE /                  
COMPND   3 METHENYLTETRAHYDROFOLATE CYCLOHYDROLASE;                             
COMPND   4 CHAIN: A, B;                                                         
COMPND   5 SYNONYM: METHYLENETHF DEHYDROGENASE / METHENYLTHF                    
COMPND   6 CYCLOHYDROLASE;                                                      
COMPND   7 EC: 1.5.1.5, 3.5.4.9;                                                
COMPND   8 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 CELLULAR_LOCATION: CYTOPLASM;                                        
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    THF, BIFUNCTIONAL, DEHYDROGENASE, CYCLOHYDROLASE, FOLATE,             
KEYWDS   2 OXIDOREDUCTASE                                                       
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.ALLAIRE,Y.LI,R.E.MACKENZIE,M.CYGLER                                 
REVDAT   4   24-FEB-09 1A4I    1       VERSN                                    
REVDAT   3   01-APR-03 1A4I    1       JRNL                                     
REVDAT   2   23-MAR-99 1A4I    3       HET    SOURCE COMPND REMARK              
REVDAT   2 2                   3       HETATM JRNL   KEYWDS HEADER              
REVDAT   1   09-FEB-99 1A4I    0                                                
JRNL        AUTH   M.ALLAIRE,Y.LI,R.E.MACKENZIE,M.CYGLER                        
JRNL        TITL   THE 3-D STRUCTURE OF A FOLATE-DEPENDENT                      
JRNL        TITL 2 DEHYDROGENASE/CYCLOHYDROLASE BIFUNCTIONAL ENZYME             
JRNL        TITL 3 AT 1.5 A RESOLUTION.                                         
JRNL        REF    STRUCTURE                     V.   6   173 1998              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   9519408                                                      
JRNL        DOI    10.1016/S0969-2126(98)00019-7                                
REMARK   1                                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.50 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
REMARK   3   AUTHORS     : MURSHUDOV,VAGIN,DODSON                               
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.50                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 90.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 71679                          
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) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.199                           
REMARK   3   FREE R VALUE                     : 0.235                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 3816                            
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4396                                    
REMARK   3   NUCLEIC ACID ATOMS       : NULL                                    
REMARK   3   HETEROGEN ATOMS          : 96                                      
REMARK   3   SOLVENT ATOMS            : 407                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 16.30                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 19.50                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
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): NULL          
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): NULL          
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): NULL          
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   DISTANCE RESTRAINTS.                    RMS    SIGMA               
REMARK   3    BOND LENGTH                     (A) : 0.015 ; 0.020               
REMARK   3    ANGLE DISTANCE                  (A) : 0.033 ; 0.040               
REMARK   3    INTRAPLANAR 1-4 DISTANCE        (A) : 0.040 ; 0.050               
REMARK   3    H-BOND OR METAL COORDINATION    (A) : NULL  ; NULL                
REMARK   3                                                                      
REMARK   3   PLANE RESTRAINT                  (A) : 0.026 ; 0.030               
REMARK   3   CHIRAL-CENTER RESTRAINT       (A**3) : 0.144 ; 0.150               
REMARK   3                                                                      
REMARK   3   NON-BONDED CONTACT RESTRAINTS.                                     
REMARK   3    SINGLE TORSION                  (A) : 0.178 ; 0.300               
REMARK   3    MULTIPLE TORSION                (A) : 0.254 ; 0.300               
REMARK   3    H-BOND (X...Y)                  (A) : 0.162 ; 0.300               
REMARK   3    H-BOND (X-H...Y)                (A) : NULL  ; NULL                
REMARK   3                                                                      
REMARK   3   CONFORMATIONAL TORSION ANGLE RESTRAINTS.                           
REMARK   3    SPECIFIED                 (DEGREES) : NULL  ; NULL                
REMARK   3    PLANAR                    (DEGREES) : 4.400 ; 7.000               
REMARK   3    STAGGERED                 (DEGREES) : 15.900; 15.000              
REMARK   3    TRANSVERSE                (DEGREES) : 33.000; 20.000              
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.600 ; 2.000                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.100 ; 3.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 2.500 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 3.900 ; 3.000                
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: DISORDERED RESIDUES (A241-A250,A297-      
REMARK   3  A301,B297-B301) AND DISORDERED SIDE CHAINS (A83,A251,A292,          
REMARK   3  A296,B296), BAD ELECTRON DENSITY (A142).                            
REMARK   4                                                                      
REMARK   4 1A4I COMPLIES WITH FORMAT V. 3.15, 01-DEC-08                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : OCT-96                             
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 5.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : CHESS                              
REMARK 200  BEAMLINE                       : F2                                 
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.918                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : PRINCETON 2K                       
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 75578                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.500                              
REMARK 200  RESOLUTION RANGE LOW       (A) : NULL                               
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 90.0                               
REMARK 200  DATA REDUNDANCY                : 10.000                             
REMARK 200  R MERGE                    (I) : 0.06800                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: NULL                                           
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD SELENOMET                
REMARK 200 SOFTWARE USED: MLPHARE                                               
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 44.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.10                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 5.5                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
REMARK 290       4555   X+1/2,-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       33.76150            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       30.70150            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       67.92150            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       30.70150            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       33.76150            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       67.92150            
REMARK 290   SMTRY3   4  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: 4830 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 24390 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -15.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
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     VAL A   241                                                      
REMARK 465     PRO A   242                                                      
REMARK 465     ASP A   243                                                      
REMARK 465     ASP A   244                                                      
REMARK 465     LYS A   245                                                      
REMARK 465     LYS A   246                                                      
REMARK 465     PRO A   247                                                      
REMARK 465     ASN A   248                                                      
REMARK 465     GLY A   249                                                      
REMARK 465     ARG A   250                                                      
REMARK 465     LYS A   297                                                      
REMARK 465     PHE A   298                                                      
REMARK 465     LYS A   299                                                      
REMARK 465     PRO A   300                                                      
REMARK 465     GLY A   301                                                      
REMARK 465     MET B     1                                                      
REMARK 465     LYS B   297                                                      
REMARK 465     PHE B   298                                                      
REMARK 465     LYS B   299                                                      
REMARK 465     PRO B   300                                                      
REMARK 465     GLY B   301                                                      
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   83   CG    CD    CE    NZ                                
REMARK 480     LYS A  251   CG    CD    CE    NZ                                
REMARK 480     LYS A  292   CG    CD    CE    NZ                                
REMARK 480     GLU A  296   CG    CD    OE1   OE2                               
REMARK 480     GLU B  296   CG    CD    OE1   OE2                               
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   O    HOH A   389     O    HOH B   502     3555     2.19            
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    GLU B 296   CB    GLU B 296   CG      0.140                       
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    ARG A  74   NE  -  CZ  -  NH2 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    TYR A  84   CB  -  CG  -  CD2 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    TYR A  84   CB  -  CG  -  CD1 ANGL. DEV. =  -4.5 DEGREES          
REMARK 500    ARG A 134   NE  -  CZ  -  NH1 ANGL. DEV. =   6.1 DEGREES          
REMARK 500    ARG A 134   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.4 DEGREES          
REMARK 500    ARG A 137   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.3 DEGREES          
REMARK 500    ASP A 142   CB  -  CA  -  C   ANGL. DEV. = -14.9 DEGREES          
REMARK 500    ASP A 142   C   -  N   -  CA  ANGL. DEV. =  15.4 DEGREES          
REMARK 500    ASP A 203   CB  -  CG  -  OD1 ANGL. DEV. =  11.6 DEGREES          
REMARK 500    ASP A 210   CB  -  CG  -  OD1 ANGL. DEV. =  -5.6 DEGREES          
REMARK 500    ASP A 235   CB  -  CG  -  OD1 ANGL. DEV. =   7.2 DEGREES          
REMARK 500    ASP A 235   CB  -  CG  -  OD2 ANGL. DEV. =  -8.8 DEGREES          
REMARK 500    LYS A 251   CA  -  CB  -  CG  ANGL. DEV. = -40.4 DEGREES          
REMARK 500    LYS A 251   CB  -  CG  -  CD  ANGL. DEV. = -25.9 DEGREES          
REMARK 500    ARG A 264   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.3 DEGREES          
REMARK 500    ARG B  17   CD  -  NE  -  CZ  ANGL. DEV. =  14.6 DEGREES          
REMARK 500    ARG B  19   NE  -  CZ  -  NH2 ANGL. DEV. =  -5.3 DEGREES          
REMARK 500    ARG B  37   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.0 DEGREES          
REMARK 500    ARG B 134   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES          
REMARK 500    PHE B 144   CB  -  CG  -  CD2 ANGL. DEV. =  -5.0 DEGREES          
REMARK 500    ARG B 166   NE  -  CZ  -  NH1 ANGL. DEV. =  -5.1 DEGREES          
REMARK 500    ARG B 173   NE  -  CZ  -  NH1 ANGL. DEV. =   4.4 DEGREES          
REMARK 500    ARG B 173   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.7 DEGREES          
REMARK 500    ASP B 203   CB  -  CG  -  OD1 ANGL. DEV. =   5.4 DEGREES          
REMARK 500    ARG B 264   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.3 DEGREES          
REMARK 500    GLN B 285   OE1 -  CD  -  NE2 ANGL. DEV. =  15.0 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    ASN A  45       48.21   -152.36                                   
REMARK 500    VAL A 177      -66.52   -131.65                                   
REMARK 500    HIS A 196     -169.66   -160.42                                   
REMARK 500    ASN B  45       43.65   -149.58                                   
REMARK 500    ARG B 173       30.38   -144.39                                   
REMARK 500    VAL B 177      -66.02   -131.88                                   
REMARK 500    HIS B 196     -169.17   -162.01                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NDP A 302                 
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NDP B 302                 
DBREF  1A4I A    2   301  UNP    P11586   C1TC_HUMAN       1    300             
DBREF  1A4I B    2   301  UNP    P11586   C1TC_HUMAN       1    300             
SEQRES   1 A  301  MET ALA PRO ALA GLU ILE LEU ASN GLY LYS GLU ILE SER          
SEQRES   2 A  301  ALA GLN ILE ARG ALA ARG LEU LYS ASN GLN VAL THR GLN          
SEQRES   3 A  301  LEU LYS GLU GLN VAL PRO GLY PHE THR PRO ARG LEU ALA          
SEQRES   4 A  301  ILE LEU GLN VAL GLY ASN ARG ASP ASP SER ASN LEU TYR          
SEQRES   5 A  301  ILE ASN VAL LYS LEU LYS ALA ALA GLU GLU ILE GLY ILE          
SEQRES   6 A  301  LYS ALA THR HIS ILE LYS LEU PRO ARG THR THR THR GLU          
SEQRES   7 A  301  SER GLU VAL MET LYS TYR ILE THR SER LEU ASN GLU ASP          
SEQRES   8 A  301  SER THR VAL HIS GLY PHE LEU VAL GLN LEU PRO LEU ASP          
SEQRES   9 A  301  SER GLU ASN SER ILE ASN THR GLU GLU VAL ILE ASN ALA          
SEQRES  10 A  301  ILE ALA PRO GLU LYS ASP VAL ASP GLY LEU THR SER ILE          
SEQRES  11 A  301  ASN ALA GLY ARG LEU ALA ARG GLY ASP LEU ASN ASP CYS          
SEQRES  12 A  301  PHE ILE PRO CYS THR PRO LYS GLY CYS LEU GLU LEU ILE          
SEQRES  13 A  301  LYS GLU THR GLY VAL PRO ILE ALA GLY ARG HIS ALA VAL          
SEQRES  14 A  301  VAL VAL GLY ARG SER LYS ILE VAL GLY ALA PRO MET HIS          
SEQRES  15 A  301  ASP LEU LEU LEU TRP ASN ASN ALA THR VAL THR THR CYS          
SEQRES  16 A  301  HIS SER LYS THR ALA HIS LEU ASP GLU GLU VAL ASN LYS          
SEQRES  17 A  301  GLY ASP ILE LEU VAL VAL ALA THR GLY GLN PRO GLU MET          
SEQRES  18 A  301  VAL LYS GLY GLU TRP ILE LYS PRO GLY ALA ILE VAL ILE          
SEQRES  19 A  301  ASP CYS GLY ILE ASN TYR VAL PRO ASP ASP LYS LYS PRO          
SEQRES  20 A  301  ASN GLY ARG LYS VAL VAL GLY ASP VAL ALA TYR ASP GLU          
SEQRES  21 A  301  ALA LYS GLU ARG ALA SER PHE ILE THR PRO VAL PRO GLY          
SEQRES  22 A  301  GLY VAL GLY PRO MET THR VAL ALA MET LEU MET GLN SER          
SEQRES  23 A  301  THR VAL GLU SER ALA LYS ARG PHE LEU GLU LYS PHE LYS          
SEQRES  24 A  301  PRO GLY                                                      
SEQRES   1 B  301  MET ALA PRO ALA GLU ILE LEU ASN GLY LYS GLU ILE SER          
SEQRES   2 B  301  ALA GLN ILE ARG ALA ARG LEU LYS ASN GLN VAL THR GLN          
SEQRES   3 B  301  LEU LYS GLU GLN VAL PRO GLY PHE THR PRO ARG LEU ALA          
SEQRES   4 B  301  ILE LEU GLN VAL GLY ASN ARG ASP ASP SER ASN LEU TYR          
SEQRES   5 B  301  ILE ASN VAL LYS LEU LYS ALA ALA GLU GLU ILE GLY ILE          
SEQRES   6 B  301  LYS ALA THR HIS ILE LYS LEU PRO ARG THR THR THR GLU          
SEQRES   7 B  301  SER GLU VAL MET LYS TYR ILE THR SER LEU ASN GLU ASP          
SEQRES   8 B  301  SER THR VAL HIS GLY PHE LEU VAL GLN LEU PRO LEU ASP          
SEQRES   9 B  301  SER GLU ASN SER ILE ASN THR GLU GLU VAL ILE ASN ALA          
SEQRES  10 B  301  ILE ALA PRO GLU LYS ASP VAL ASP GLY LEU THR SER ILE          
SEQRES  11 B  301  ASN ALA GLY ARG LEU ALA ARG GLY ASP LEU ASN ASP CYS          
SEQRES  12 B  301  PHE ILE PRO CYS THR PRO LYS GLY CYS LEU GLU LEU ILE          
SEQRES  13 B  301  LYS GLU THR GLY VAL PRO ILE ALA GLY ARG HIS ALA VAL          
SEQRES  14 B  301  VAL VAL GLY ARG SER LYS ILE VAL GLY ALA PRO MET HIS          
SEQRES  15 B  301  ASP LEU LEU LEU TRP ASN ASN ALA THR VAL THR THR CYS          
SEQRES  16 B  301  HIS SER LYS THR ALA HIS LEU ASP GLU GLU VAL ASN LYS          
SEQRES  17 B  301  GLY ASP ILE LEU VAL VAL ALA THR GLY GLN PRO GLU MET          
SEQRES  18 B  301  VAL LYS GLY GLU TRP ILE LYS PRO GLY ALA ILE VAL ILE          
SEQRES  19 B  301  ASP CYS GLY ILE ASN TYR VAL PRO ASP ASP LYS LYS PRO          
SEQRES  20 B  301  ASN GLY ARG LYS VAL VAL GLY ASP VAL ALA TYR ASP GLU          
SEQRES  21 B  301  ALA LYS GLU ARG ALA SER PHE ILE THR PRO VAL PRO GLY          
SEQRES  22 B  301  GLY VAL GLY PRO MET THR VAL ALA MET LEU MET GLN SER          
SEQRES  23 B  301  THR VAL GLU SER ALA LYS ARG PHE LEU GLU LYS PHE LYS          
SEQRES  24 B  301  PRO GLY                                                      
HET    NDP  A 302      48                                                       
HET    NDP  B 302      48                                                       
HETNAM     NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE                  
HETNAM   2 NDP  PHOSPHATE                                                       
FORMUL   3  NDP    2(C21 H30 N7 O17 P3)                                         
FORMUL   5  HOH   *407(H2 O)                                                    
HELIX    1   1 GLY A    9  GLN A   30  1                                  22    
HELIX    2   2 ASP A   47  ILE A   63  1                                  17    
HELIX    3   3 GLU A   78  GLU A   90  1                                  13    
HELIX    4   4 THR A  111  ALA A  117  1                                   7    
HELIX    5   5 PRO A  120  LYS A  122  5                                   3    
HELIX    6   6 SER A  129  ARG A  137  1                                   9    
HELIX    7   7 CYS A  147  THR A  159  1                                  13    
HELIX    8   8 GLY A  178  ASN A  188  1                                  11    
HELIX    9   9 LEU A  202  LYS A  208  1                                   7    
HELIX   10  10 GLY A  224  TRP A  226  5                                   3    
HELIX   11  11 TYR A  258  GLU A  263  1                                   6    
HELIX   12  12 VAL A  275  PHE A  294  1                                  20    
HELIX   13  13 GLY B    9  GLN B   30  1                                  22    
HELIX   14  14 ASP B   47  ILE B   63  1                                  17    
HELIX   15  15 GLU B   78  GLU B   90  1                                  13    
HELIX   16  16 THR B  111  ALA B  117  1                                   7    
HELIX   17  17 PRO B  120  LYS B  122  5                                   3    
HELIX   18  18 SER B  129  ARG B  137  1                                   9    
HELIX   19  19 CYS B  147  THR B  159  1                                  13    
HELIX   20  20 GLY B  178  TRP B  187  1                                  10    
HELIX   21  21 LEU B  202  LYS B  208  1                                   7    
HELIX   22  22 GLY B  224  TRP B  226  5                                   3    
HELIX   23  23 TYR B  258  GLU B  263  1                                   6    
HELIX   24  24 GLY B  276  PHE B  294  5                                  19    
SHEET    1   A 2 GLU A   5  LEU A   7  0                                        
SHEET    2   A 2 PHE A 267  THR A 269  1  N  ILE A 268   O  GLU A   5           
SHEET    1   B 3 LYS A  66  LEU A  72  0                                        
SHEET    2   B 3 ARG A  37  VAL A  43  1  N  LEU A  38   O  LYS A  66           
SHEET    3   B 3 GLY A  96  VAL A  99  1  N  GLY A  96   O  ALA A  39           
SHEET    1   C 4 THR A 191  CYS A 195  0                                        
SHEET    2   C 4 HIS A 167  VAL A 171  1  N  ALA A 168   O  THR A 191           
SHEET    3   C 4 ILE A 211  VAL A 214  1  N  ILE A 211   O  VAL A 169           
SHEET    4   C 4 ILE A 232  ASP A 235  1  N  ILE A 232   O  LEU A 212           
SHEET    1   D 2 GLU B   5  LEU B   7  0                                        
SHEET    2   D 2 PHE B 267  THR B 269  1  N  ILE B 268   O  GLU B   5           
SHEET    1   E 3 LYS B  66  LEU B  72  0                                        
SHEET    2   E 3 ARG B  37  VAL B  43  1  N  LEU B  38   O  LYS B  66           
SHEET    3   E 3 GLY B  96  VAL B  99  1  N  GLY B  96   O  ALA B  39           
SHEET    1   F 4 THR B 191  CYS B 195  0                                        
SHEET    2   F 4 HIS B 167  VAL B 171  1  N  ALA B 168   O  THR B 191           
SHEET    3   F 4 ILE B 211  VAL B 214  1  N  ILE B 211   O  VAL B 169           
SHEET    4   F 4 ILE B 232  ASP B 235  1  N  ILE B 232   O  LEU B 212           
SHEET    1   G 2 ASN B 239  PRO B 242  0                                        
SHEET    2   G 2 ARG B 250  VAL B 253 -1  N  VAL B 253   O  ASN B 239           
CISPEP   1 LEU A  101    PRO A  102          0         0.05                     
CISPEP   2 VAL A  271    PRO A  272          0         0.84                     
CISPEP   3 LEU B  101    PRO B  102          0        -3.15                     
CISPEP   4 VAL B  271    PRO B  272          0        -2.36                     
SITE     1 AC1 25 THR A 148  GLY A 172  ARG A 173  SER A 174                    
SITE     2 AC1 25 VAL A 177  HIS A 196  SER A 197  ALA A 215                    
SITE     3 AC1 25 THR A 216  GLY A 217  GLN A 218  CYS A 236                    
SITE     4 AC1 25 GLY A 237  ILE A 238  GLY A 276  HOH A 314                    
SITE     5 AC1 25 HOH A 365  HOH A 367  HOH A 404  HOH A 411                    
SITE     6 AC1 25 HOH A 426  HOH A 435  HOH A 436  HOH A 443                    
SITE     7 AC1 25 HOH A 466                                                     
SITE     1 AC2 26 THR B 148  GLY B 172  ARG B 173  SER B 174                    
SITE     2 AC2 26 VAL B 177  HIS B 196  SER B 197  ALA B 215                    
SITE     3 AC2 26 THR B 216  GLY B 217  GLN B 218  MET B 221                    
SITE     4 AC2 26 CYS B 236  GLY B 237  ILE B 238  THR B 279                    
SITE     5 AC2 26 HOH B 309  HOH B 343  HOH B 364  HOH B 371                    
SITE     6 AC2 26 HOH B 374  HOH B 405  HOH B 417  HOH B 477                    
SITE     7 AC2 26 HOH B 490  HOH B 519                                          
CRYST1   67.523  135.843   61.403  90.00  90.00  90.00 P 21 21 21    8          
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      0.014810  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.007361  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.016286        0.00000                         
MTRIX1   1 -0.993999 -0.109179  0.006835       15.13118    1                    
MTRIX2   1  0.102940 -0.912405  0.396132       56.48041    1                    
MTRIX3   1 -0.037013  0.394458  0.918168      -12.37380    1