HEADER    TRANSFERASE                             17-DEC-01   1GRV              
TITLE     HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE FROM E. COLI                   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE;                    
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: HPRT;                                                       
COMPND   5 EC: 2.4.2.8;                                                         
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    RIBOSYLTRANSFERASE, TRANSFERASE, GLYCOSYLTRANSFERASE                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    L.W.GUDDAT,S.VOS,J.L.MARTIN,D.T.KEOUGH,J.DE JERSEY                    
REVDAT   4   13-DEC-23 1GRV    1       REMARK LINK                              
REVDAT   3   24-FEB-09 1GRV    1       VERSN                                    
REVDAT   2   01-MAY-07 1GRV    1       REMARK                                   
REVDAT   1   13-DEC-02 1GRV    0                                                
JRNL        AUTH   L.W.GUDDAT,S.VOS,J.L.MARTIN,D.T.KEOUGH,J.DE JERSEY           
JRNL        TITL   CRYSTAL STRUCTURES OF FREE, IMP-, AND GMP- BOUND ESCHERICHIA 
JRNL        TITL 2 COLI HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE                  
JRNL        REF    PROTEIN SCI.                  V.  11  1626 2002              
JRNL        REFN                   ISSN 0961-8368                               
JRNL        PMID   12070315                                                     
JRNL        DOI    10.1110/PS.0201002                                           
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.0                                              
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : NULL                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 50.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 10000000.000                   
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 92.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 14653                          
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 SET) : 0.214                           
REMARK   3   FREE R VALUE                     : 0.238                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1429                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 10                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.90                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 3.00                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 56.00                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 681                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3060                       
REMARK   3   BIN FREE R VALUE                    : 0.3530                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 10.00                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 75                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                         
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2666                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 2                                       
REMARK   3   SOLVENT ATOMS            : 74                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 30.80                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -4.75300                                             
REMARK   3    B22 (A**2) : -4.75300                                             
REMARK   3    B33 (A**2) : 9.50600                                              
REMARK   3    B12 (A**2) : -7.42700                                             
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.35                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.43                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.41                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.47                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.300                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 24.40                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.740                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.129 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 1.976 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 1.837 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 2.920 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : SHELL MODEL                                          
REMARK   3   KSOL        : 0.22                                                 
REMARK   3   BSOL        : 41.00                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  3  : ION.PARAM                                      
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  3   : ION.TOP                                        
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: THERE WAS INSUFFICIENT DENSITY TO MODEL   
REMARK   3  THE POLYPEPTIDE CHAIN FOR RESIDUES 1-4, 73-81, 182 IN CHAIN A       
REMARK   3  AND 1-4, 74-81 AND 182 IN CHAIN B                                   
REMARK   4                                                                      
REMARK   4 1GRV COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 17-DEC-01.                  
REMARK 100 THE DEPOSITION ID IS D_1290009132.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 12-DEC-00                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 7.40                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 14-BM-D                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.0                                
REMARK 200  MONOCHROMATOR                  : CARS-DESIGN SI(III)                
REMARK 200                                   MONOCHROMATOR                      
REMARK 200  OPTICS                         : CARS DESIGN CYLINDRICAL FOCUSING   
REMARK 200                                   MIRROE                             
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC CCD                           
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 46525                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.900                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 92.0                               
REMARK 200  DATA REDUNDANCY                : 3.300                              
REMARK 200  R MERGE                    (I) : 0.10300                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 7.2000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.00                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 56.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.30                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.29300                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.800                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: PDB ENTRY 1G9S                                       
REMARK 200                                                                      
REMARK 200 REMARK: DATA WERE COLLECTED USING THE OSCILLATION METHOD             
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 70.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.10                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1 M HEPES PH 7.5, 0.1 M SODIUM         
REMARK 280  CITRATE, PH 7.40                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 2 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+1/3                                            
REMARK 290       3555   -X+Y,-X,Z+2/3                                           
REMARK 290       4555   Y,X,-Z                                                  
REMARK 290       5555   X-Y,-Y,-Z+2/3                                           
REMARK 290       6555   -X,-X+Y,-Z+1/3                                          
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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       56.46667            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000      112.93333            
REMARK 290   SMTRY1   4 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   5  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000      112.93333            
REMARK 290   SMTRY1   6 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   6 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000       56.46667            
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: TETRAMERIC                        
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PQS                                                   
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 350   BIOMT1   2  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000      145.31906            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000      112.93333            
REMARK 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 CATALYTIC ACTIVITY IS IMP + DIPHOSPHATE = HYPOXANTHINE +             
REMARK 400  5-PHOSPHO-ALPHA-D-RIBOSE 1-DIPHOSPHATE. THIS ENZYME                 
REMARK 400  ACTS EXCLUSIVELY ON HYPOXANTHINE AND NOT ON GUANINE.                
REMARK 400  MEMBER OF THE PURINE/PYRIMIDINE PHOSPHORIBOSYLTRANSFERASE           
REMARK 400  FAMILY                                                              
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     2                                                      
REMARK 465     ARG A     3                                                      
REMARK 465     ASP A     4                                                      
REMARK 465     SER A    73                                                      
REMARK 465     TYR A    74                                                      
REMARK 465     GLY A    75                                                      
REMARK 465     SER A    76                                                      
REMARK 465     GLY A    77                                                      
REMARK 465     MET A    78                                                      
REMARK 465     SER A    79                                                      
REMARK 465     THR A    80                                                      
REMARK 465     THR A    81                                                      
REMARK 465     GLU A   182                                                      
REMARK 465     MET B     1                                                      
REMARK 465     VAL B     2                                                      
REMARK 465     ARG B     3                                                      
REMARK 465     ASP B     4                                                      
REMARK 465     TYR B    74                                                      
REMARK 465     GLY B    75                                                      
REMARK 465     SER B    76                                                      
REMARK 465     GLY B    77                                                      
REMARK 465     MET B    78                                                      
REMARK 465     SER B    79                                                      
REMARK 465     THR B    80                                                      
REMARK 465     THR B    81                                                      
REMARK 465     GLU B   182                                                      
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   6    CG   CD   CE   NZ                                   
REMARK 470     ASP A 181    CG   OD1  OD2                                       
REMARK 470     LYS B   6    CG   CD   CE   NZ                                   
REMARK 470     ARG B  82    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ASP B 181    CG   OD1  OD2                                       
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    GLN A  61       36.52    -84.30                                   
REMARK 500    ASP A 107      -89.32   -130.98                                   
REMARK 500    ASP A 154       67.88    -69.72                                   
REMARK 500    TYR A 168       -8.69     72.07                                   
REMARK 500    LYS B   6      102.85     57.48                                   
REMARK 500    GLN B  61       36.24    -84.17                                   
REMARK 500    ASP B 107      -89.09   -130.65                                   
REMARK 500    TYR B 168       -8.55     72.44                                   
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 B 491  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A 103   OE2                                                    
REMARK 620 2 ASP A 104   OD1 127.6                                              
REMARK 620 3 HOH A2017   O    53.4 155.3                                        
REMARK 620 4 HOH A2018   O    77.6  73.1  84.2                                  
REMARK 620 5 HOH A2019   O   108.1 106.0  58.1  76.5                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 490  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU B 103   OE2                                                    
REMARK 620 2 ASP B 104   OD1 141.2                                              
REMARK 620 3 HOH B2024   O    93.8 125.0                                        
REMARK 620 4 HOH B2026   O    96.7  84.2  89.9                                  
REMARK 620 N                    1     2     3                                   
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 490                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 491                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1G9S   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF A COMPLEX BETWEEN E. COLI HPRT AND IMP          
REMARK 900 RELATED ID: 1G9T   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF E.COLI HPRT-GMP COMPLEX                         
DBREF  1GRV A    1     4  PDB    1GRV     1GRV             1      4             
DBREF  1GRV A    5   182  UNP    P36766   HPRT_ECOLI       1    178             
DBREF  1GRV B    1     4  PDB    1GRV     1GRV             1      4             
DBREF  1GRV B    5   182  UNP    P36766   HPRT_ECOLI       1    178             
SEQADV 1GRV LEU A   84  UNP  P36766    VAL    80 CONFLICT                       
SEQADV 1GRV LEU B   84  UNP  P36766    VAL    80 CONFLICT                       
SEQRES   1 A  182  MET VAL ARG ASP MET LYS HIS THR VAL GLU VAL MET ILE          
SEQRES   2 A  182  PRO GLU ALA GLU ILE LYS ALA ARG ILE ALA GLU LEU GLY          
SEQRES   3 A  182  ARG GLN ILE THR GLU ARG TYR LYS ASP SER GLY SER ASP          
SEQRES   4 A  182  MET VAL LEU VAL GLY LEU LEU ARG GLY SER PHE MET PHE          
SEQRES   5 A  182  MET ALA ASP LEU CYS ARG GLU VAL GLN VAL SER HIS GLU          
SEQRES   6 A  182  VAL ASP PHE MET THR ALA SER SER TYR GLY SER GLY MET          
SEQRES   7 A  182  SER THR THR ARG ASP LEU LYS ILE LEU LYS ASP LEU ASP          
SEQRES   8 A  182  GLU ASP ILE ARG GLY LYS ASP VAL LEU ILE VAL GLU ASP          
SEQRES   9 A  182  ILE ILE ASP SER GLY ASN THR LEU SER LYS VAL ARG GLU          
SEQRES  10 A  182  ILE LEU SER LEU ARG GLU PRO LYS SER LEU ALA ILE CYS          
SEQRES  11 A  182  THR LEU LEU ASP LYS PRO SER ARG ARG GLU VAL ASN VAL          
SEQRES  12 A  182  PRO VAL GLU PHE ILE GLY PHE SER ILE PRO ASP GLU PHE          
SEQRES  13 A  182  VAL VAL GLY TYR GLY ILE ASP TYR ALA GLN ARG TYR ARG          
SEQRES  14 A  182  HIS LEU PRO TYR ILE GLY LYS VAL ILE LEU LEU ASP GLU          
SEQRES   1 B  182  MET VAL ARG ASP MET LYS HIS THR VAL GLU VAL MET ILE          
SEQRES   2 B  182  PRO GLU ALA GLU ILE LYS ALA ARG ILE ALA GLU LEU GLY          
SEQRES   3 B  182  ARG GLN ILE THR GLU ARG TYR LYS ASP SER GLY SER ASP          
SEQRES   4 B  182  MET VAL LEU VAL GLY LEU LEU ARG GLY SER PHE MET PHE          
SEQRES   5 B  182  MET ALA ASP LEU CYS ARG GLU VAL GLN VAL SER HIS GLU          
SEQRES   6 B  182  VAL ASP PHE MET THR ALA SER SER TYR GLY SER GLY MET          
SEQRES   7 B  182  SER THR THR ARG ASP LEU LYS ILE LEU LYS ASP LEU ASP          
SEQRES   8 B  182  GLU ASP ILE ARG GLY LYS ASP VAL LEU ILE VAL GLU ASP          
SEQRES   9 B  182  ILE ILE ASP SER GLY ASN THR LEU SER LYS VAL ARG GLU          
SEQRES  10 B  182  ILE LEU SER LEU ARG GLU PRO LYS SER LEU ALA ILE CYS          
SEQRES  11 B  182  THR LEU LEU ASP LYS PRO SER ARG ARG GLU VAL ASN VAL          
SEQRES  12 B  182  PRO VAL GLU PHE ILE GLY PHE SER ILE PRO ASP GLU PHE          
SEQRES  13 B  182  VAL VAL GLY TYR GLY ILE ASP TYR ALA GLN ARG TYR ARG          
SEQRES  14 B  182  HIS LEU PRO TYR ILE GLY LYS VAL ILE LEU LEU ASP GLU          
HET     MG  A 490       1                                                       
HET     MG  B 491       1                                                       
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3   MG    2(MG 2+)                                                     
FORMUL   5  HOH   *74(H2 O)                                                     
HELIX    1   1 PRO A   14  LYS A   34  1                                  21    
HELIX    2   2 SER A   49  VAL A   60  1                                  12    
HELIX    3   3 GLY A  109  LEU A  121  1                                  13    
HELIX    4   4 PRO A  136  ARG A  139  5                                   4    
HELIX    5   5 PRO B   14  LYS B   34  1                                  21    
HELIX    6   6 SER B   49  VAL B   60  1                                  12    
HELIX    7   7 GLY B  109  LEU B  121  1                                  13    
HELIX    8   8 PRO B  136  ARG B  139  5                                   4    
SHEET    1  AA 3 HIS A   7  ILE A  13  0                                        
SHEET    2  AA 3 ILE A 174  LEU A 179 -1  O  ILE A 174   N  MET A  12           
SHEET    3  AA 3 VAL A 157  VAL A 158 -1  O  VAL A 158   N  GLY A 175           
SHEET    1  AB 6 ILE A  86  LYS A  88  0                                        
SHEET    2  AB 6 HIS A  64  ALA A  71 -1  O  THR A  70   N  LYS A  88           
SHEET    3  AB 6 MET A  40  LEU A  45  1  O  MET A  40   N  GLU A  65           
SHEET    4  AB 6 ASP A  98  ILE A 106  1  O  ASP A  98   N  VAL A  41           
SHEET    5  AB 6 SER A 126  ASP A 134  1  O  SER A 126   N  VAL A  99           
SHEET    6  AB 6 PHE A 147  SER A 151  1  O  PHE A 147   N  THR A 131           
SHEET    1  BA 3 HIS B   7  ILE B  13  0                                        
SHEET    2  BA 3 ILE B 174  LEU B 179 -1  O  ILE B 174   N  MET B  12           
SHEET    3  BA 3 VAL B 157  VAL B 158 -1  O  VAL B 158   N  GLY B 175           
SHEET    1  BB 6 ILE B  86  LYS B  88  0                                        
SHEET    2  BB 6 HIS B  64  ALA B  71 -1  O  THR B  70   N  LYS B  88           
SHEET    3  BB 6 MET B  40  LEU B  45  1  O  MET B  40   N  GLU B  65           
SHEET    4  BB 6 ASP B  98  ILE B 106  1  O  ASP B  98   N  VAL B  41           
SHEET    5  BB 6 SER B 126  ASP B 134  1  O  SER B 126   N  VAL B  99           
SHEET    6  BB 6 PHE B 147  SER B 151  1  O  PHE B 147   N  THR B 131           
LINK         OE2 GLU A 103                MG    MG B 491     1555   1555  2.12  
LINK         OD1 ASP A 104                MG    MG B 491     1555   1555  2.06  
LINK        MG    MG A 490                 OE2 GLU B 103     1555   1555  2.00  
LINK        MG    MG A 490                 OD1 ASP B 104     1555   1555  2.02  
LINK        MG    MG A 490                 O   HOH B2024     1555   1555  2.14  
LINK        MG    MG A 490                 O   HOH B2026     1555   1555  2.22  
LINK         O   HOH A2017                MG    MG B 491     1555   1555  3.13  
LINK         O   HOH A2018                MG    MG B 491     1555   1555  2.29  
LINK         O   HOH A2019                MG    MG B 491     1555   1555  1.97  
CISPEP   1 LEU A   46    ARG A   47          0         2.05                     
CISPEP   2 LEU B   46    ARG B   47          0         3.12                     
SITE     1 AC1  4 GLU B 103  ASP B 104  HOH B2024  HOH B2026                    
SITE     1 AC2  4 GLU A 103  ASP A 104  HOH A2018  HOH A2019                    
CRYST1   83.900   83.900  169.400  90.00  90.00 120.00 P 31 2 1     12          
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      0.011919  0.006881  0.000000        0.00000                         
SCALE2      0.000000  0.013763  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.005903        0.00000