HEADER    TRANSFERASE                             09-JUL-99   1QK5              
TITLE     TOXOPLASMA GONDII HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE WITH 
TITLE    2 XMP, PYROPHOSPHATE AND TWO MG2+ IONS                                 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE;            
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: HGPRTASE;                                                   
COMPND   5 EC: 2.4.2.8;                                                         
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: TOXOPLASMA GONDII;                              
SOURCE   3 ORGANISM_TAXID: 383379;                                              
SOURCE   4 STRAIN: RH;                                                          
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE   8 EXPRESSION_SYSTEM_VECTOR: PET15B;                                    
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PETC1-D150A                               
KEYWDS    TRANSFERASE, GLYCOSYLTRANSFERASE, PURINE SALVAGE                      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.HEROUX,E.L.WHITE,L.J.ROSS,R.L.DAVIS,D.W.BORHANI                     
REVDAT   6   13-DEC-23 1QK5    1       REMARK LINK                              
REVDAT   5   06-MAR-19 1QK5    1       REMARK                                   
REVDAT   4   24-FEB-09 1QK5    1       VERSN                                    
REVDAT   3   10-DEC-99 1QK5    1       JRNL                                     
REVDAT   2   14-NOV-99 1QK5    1       JRNL                                     
REVDAT   1   17-OCT-99 1QK5    0                                                
JRNL        AUTH   A.HEROUX,E.L.WHITE,L.J.ROSS,R.L.DAVIS,D.W.BORHANI            
JRNL        TITL   CRYSTAL STRUCTURE OF TOXOPLASMA GONDII HYPOXANTHINE-GUANINE  
JRNL        TITL 2 PHOSPHORIBOSYLTRANSFERASE WITH XMP, PYROPHOSPHATE AND TWO    
JRNL        TITL 3 MG2+ IONS BOUND: INSIGHTS INTO THE CATALYTIC MECHANISM       
JRNL        REF    BIOCHEMISTRY                  V.  38 14495 1999              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   10545171                                                     
JRNL        DOI    10.1021/BI990508I                                            
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   A.HEROUX,E.L.WHITE,L.J.ROSS,D.W.BORHANI                      
REMARK   1  TITL   CRYSTAL STRUCTURES OF THE TOXOPLASMA GONDII                  
REMARK   1  TITL 2 HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE GMP AND IMP   
REMARK   1  TITL 3 COMPLEXES: COMPARISON OF PURINE BINDING INTERACTIONS WITH    
REMARK   1  TITL 4 THE XMP COMPLEX                                              
REMARK   1  REF    BIOCHEMISTRY                  V.  38 14485 1999              
REMARK   1  REFN                   ISSN 0006-2960                               
REMARK   1  PMID   10545170                                                     
REMARK   1  DOI    10.1021/BI990507Q                                            
REMARK   1 REFERENCE 2                                                          
REMARK   1  AUTH   G.VASANTHAKUMAR,S.VAN GINKEL,G.PARISH                        
REMARK   1  TITL   ISOLATION AND SEQUENCING OF A CDNA ENCODING THE              
REMARK   1  TITL 2 HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE FROM          
REMARK   1  TITL 3 TOXOPLASMA GONDII                                            
REMARK   1  REF    GENE                          V. 147   153 1994              
REMARK   1  REFN                   ISSN 0378-1119                               
REMARK   1  PMID   8088544                                                      
REMARK   1  DOI    10.1016/0378-1119(94)90058-2                                 
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.60 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 13.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 55139                          
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) : 0.234                           
REMARK   3   FREE R VALUE                     : 0.261                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2953                            
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3472                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 70                                      
REMARK   3   SOLVENT ATOMS            : 182                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 24.14                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 25.06                          
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): 0.116         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.111         
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) : 0.040 ; 0.040               
REMARK   3    INTRAPLANAR 1-4 DISTANCE        (A) : 0.038 ; 0.050               
REMARK   3    H-BOND OR METAL COORDINATION    (A) : NULL  ; NULL                
REMARK   3                                                                      
REMARK   3   PLANE RESTRAINT                  (A) : 0.012 ; 0.020               
REMARK   3   CHIRAL-CENTER RESTRAINT       (A**3) : 0.147 ; 0.150               
REMARK   3                                                                      
REMARK   3   NON-BONDED CONTACT RESTRAINTS.                                     
REMARK   3    SINGLE TORSION                  (A) : NULL  ; NULL                
REMARK   3    MULTIPLE TORSION                (A) : NULL  ; NULL                
REMARK   3    H-BOND (X...Y)                  (A) : NULL  ; NULL                
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) : NULL  ; NULL                
REMARK   3    STAGGERED                 (DEGREES) : NULL  ; NULL                
REMARK   3    TRANSVERSE                (DEGREES) : NULL  ; NULL                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.709 ; 2.000                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.466 ; 3.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 2.282 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 3.530 ; 3.000                
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NO RESTRAINTS WERE IMPOSED ON THE ATOMS   
REMARK   3  OF THE PYROPHOSPHATE GROUPS OR MAGNESIUM CATIONS.                   
REMARK   4                                                                      
REMARK   4 1QK5 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 09-JUL-99.                  
REMARK 100 THE DEPOSITION ID IS D_1290002918.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-FEB-98                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 8.50                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X25                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.10                               
REMARK 200  MONOCHROMATOR                  : SI(111)                            
REMARK 200  OPTICS                         : PT-COATED MIRROR                   
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : PRINCETON SCIENTIFIC INSTRUMENTS   
REMARK 200                                   2K CCD                             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : SCALA                              
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 58200                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.600                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 13.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.0                               
REMARK 200  DATA REDUNDANCY                : 4.200                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.07600                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 10.3000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.60                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.66                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 93.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.70                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.37300                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.400                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: PDB ENTRY 1QK3, SUBUNIT A, WITHOUT LOOPS, WATERS,    
REMARK 200  OR GMP                                                              
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 43.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.09                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 30% PEG 4000, 100 MM TRIS.CL (PH 8.5),   
REMARK 280  200 MM LI2SO4, 0.25 % BETA-OCTYLGLUCOPYRANOSIDE. THE CRYSTAL WAS    
REMARK 280  GROWN IN THE PRESENCE OF 1 MM XANTHINE, 1 MM PRPP AND 10 MM         
REMARK 280  MGCL2 AT 277 K., PH 8.50                                            
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -X,Y,-Z+1/2                                             
REMARK 290       4555   X,-Y,-Z                                                 
REMARK 290       5555   X+1/2,Y+1/2,Z                                           
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290       8555   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        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       72.14000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       72.14000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  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       27.60400            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       56.12750            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       27.60400            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       56.12750            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       72.14000            
REMARK 290   SMTRY1   7 -1.000000  0.000000  0.000000       27.60400            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000       56.12750            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       72.14000            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000       27.60400            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000       56.12750            
REMARK 290   SMTRY3   8  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 300 REMARK: THE BIOMOLECULE CONSISTS OF A HOMO-                          
REMARK 300  TETRAMERIC COMPLEXOF BIOPOLYMERSSUBUNITS C AND D OF                 
REMARK 300   THE HGPRT HOMOTETRAMER ARE GENERATEDBY ROTATION OF                 
REMARK 300   SUBUNITS A AND B ABOUT THECRYSTALLOGRAPHIC 2-                      
REMARK 300  FOLD AXIS PARALLEL TO B.                                            
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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PQS                                                   
REMARK 350 TOTAL BURIED SURFACE AREA: 11590 ANGSTROM**2                         
REMARK 350 SURFACE AREA OF THE COMPLEX: 38570 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -73.9 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 350   BIOMT1   2 -1.000000  0.000000  0.000000       55.20800            
REMARK 350   BIOMT2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000       72.14000            
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     GLY A     0A                                                     
REMARK 465     SER A     0B                                                     
REMARK 465     HIS A     0C                                                     
REMARK 465     SER A   117                                                      
REMARK 465     TYR A   118                                                      
REMARK 465     GLN A   119                                                      
REMARK 465     ASN A   120                                                      
REMARK 465     ASP A   121                                                      
REMARK 465     ASN A   122                                                      
REMARK 465     SER A   123                                                      
REMARK 465     THR A   124                                                      
REMARK 465     GLY A   125                                                      
REMARK 465     GLN A   126                                                      
REMARK 465     LEU A   127                                                      
REMARK 465     ASP A   181                                                      
REMARK 465     ARG A   182                                                      
REMARK 465     SER A   183                                                      
REMARK 465     ASN A   184                                                      
REMARK 465     GLY B     0A                                                     
REMARK 465     SER B     0B                                                     
REMARK 465     HIS B     0C                                                     
REMARK 465     SER B   117                                                      
REMARK 465     TYR B   118                                                      
REMARK 465     GLN B   119                                                      
REMARK 465     ASN B   120                                                      
REMARK 465     ASP B   121                                                      
REMARK 465     ASN B   122                                                      
REMARK 465     SER B   123                                                      
REMARK 465     THR B   124                                                      
REMARK 465     GLY B   125                                                      
REMARK 465     ASP B   181                                                      
REMARK 465     ARG B   182                                                      
REMARK 465     SER B   183                                                      
REMARK 465     ASN B   184                                                      
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     THR A 128    OG1  CG2                                            
REMARK 470     LYS A 226    CG   CD   CE   NZ                                   
REMARK 470     LYS A 230    CG   CD   CE   NZ                                   
REMARK 470     MET B   1    CG   SD   CE                                        
REMARK 470     GLN B 126    CG   CD   OE1  NE2                                  
REMARK 470     GLU B 229    CG   CD   OE1  OE2                                  
REMARK 470     LYS B 230    CG   CD   CE   NZ                                   
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    ASP A  23   CB  -  CG  -  OD2 ANGL. DEV. =   7.1 DEGREES          
REMARK 500    ASP A  43   CB  -  CG  -  OD2 ANGL. DEV. =  -6.4 DEGREES          
REMARK 500    ARG A  55   CG  -  CD  -  NE  ANGL. DEV. = -16.5 DEGREES          
REMARK 500    ARG A  55   CD  -  NE  -  CZ  ANGL. DEV. =   9.1 DEGREES          
REMARK 500    ARG A  55   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.9 DEGREES          
REMARK 500    ARG A 101   NE  -  CZ  -  NH1 ANGL. DEV. =   3.6 DEGREES          
REMARK 500    ASP A 133   CB  -  CG  -  OD2 ANGL. DEV. =  -8.8 DEGREES          
REMARK 500    ASP A 139   CB  -  CG  -  OD2 ANGL. DEV. =  -6.0 DEGREES          
REMARK 500    ASP A 147   CB  -  CG  -  OD1 ANGL. DEV. =   6.9 DEGREES          
REMARK 500    ARG A 161   CD  -  NE  -  CZ  ANGL. DEV. =   9.8 DEGREES          
REMARK 500    ARG A 161   NE  -  CZ  -  NH1 ANGL. DEV. =   3.3 DEGREES          
REMARK 500    ARG A 171   NE  -  CZ  -  NH1 ANGL. DEV. =   4.0 DEGREES          
REMARK 500    ARG A 171   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.5 DEGREES          
REMARK 500    ARG A 171   O   -  C   -  N   ANGL. DEV. =   9.9 DEGREES          
REMARK 500    SER A 185   CA  -  C   -  O   ANGL. DEV. =  12.9 DEGREES          
REMARK 500    ASP A 206   CB  -  CG  -  OD2 ANGL. DEV. =   6.0 DEGREES          
REMARK 500    TYR B   9   CB  -  CG  -  CD2 ANGL. DEV. =   4.9 DEGREES          
REMARK 500    TYR B   9   CB  -  CG  -  CD1 ANGL. DEV. =  -4.3 DEGREES          
REMARK 500    ASP B  23   CB  -  CG  -  OD1 ANGL. DEV. =   9.0 DEGREES          
REMARK 500    PHE B  32   CB  -  CG  -  CD1 ANGL. DEV. =   6.0 DEGREES          
REMARK 500    ILE B  45   O   -  C   -  N   ANGL. DEV. =  -9.9 DEGREES          
REMARK 500    ARG B  55   CD  -  NE  -  CZ  ANGL. DEV. =  12.9 DEGREES          
REMARK 500    ARG B  55   NE  -  CZ  -  NH1 ANGL. DEV. =   4.0 DEGREES          
REMARK 500    ARG B  65   NE  -  CZ  -  NH1 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    ARG B  82   CG  -  CD  -  NE  ANGL. DEV. =  20.6 DEGREES          
REMARK 500    ARG B  82   CD  -  NE  -  CZ  ANGL. DEV. =  36.7 DEGREES          
REMARK 500    ARG B  82   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.8 DEGREES          
REMARK 500    ARG B  82   NE  -  CZ  -  NH2 ANGL. DEV. =   6.8 DEGREES          
REMARK 500    ARG B 101   NE  -  CZ  -  NH1 ANGL. DEV. =   4.9 DEGREES          
REMARK 500    ARG B 101   NE  -  CZ  -  NH2 ANGL. DEV. =  -5.3 DEGREES          
REMARK 500    ARG B 114   NH1 -  CZ  -  NH2 ANGL. DEV. =   7.0 DEGREES          
REMARK 500    ARG B 114   NE  -  CZ  -  NH1 ANGL. DEV. =  -4.1 DEGREES          
REMARK 500    ARG B 114   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.1 DEGREES          
REMARK 500    ARG B 138   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ASP B 147   CB  -  CG  -  OD1 ANGL. DEV. =   6.0 DEGREES          
REMARK 500    ARG B 161   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.1 DEGREES          
REMARK 500    ARG B 171   CD  -  NE  -  CZ  ANGL. DEV. =  11.9 DEGREES          
REMARK 500    ARG B 171   NE  -  CZ  -  NH1 ANGL. DEV. =   9.4 DEGREES          
REMARK 500    ARG B 171   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.0 DEGREES          
REMARK 500    ASP B 197   CB  -  CG  -  OD2 ANGL. DEV. =  -5.5 DEGREES          
REMARK 500    ASP B 206   O   -  C   -  N   ANGL. DEV. =   9.8 DEGREES          
REMARK 500    ARG B 212   NH1 -  CZ  -  NH2 ANGL. DEV. =  -7.3 DEGREES          
REMARK 500    ARG B 212   NE  -  CZ  -  NH1 ANGL. DEV. =  13.4 DEGREES          
REMARK 500    ARG B 212   NE  -  CZ  -  NH2 ANGL. DEV. =  -6.1 DEGREES          
REMARK 500    ASP B 222   CB  -  CG  -  OD1 ANGL. DEV. =   6.7 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    ALA A 150      -87.04   -123.67                                   
REMARK 500    CYS A 204       -9.42     80.66                                   
REMARK 500    GLU A 209       -3.05     76.73                                   
REMARK 500    LYS B   4      116.38   -162.44                                   
REMARK 500    ALA B 150      -85.99   -123.46                                   
REMARK 500    CYS B 204      -16.14     84.69                                   
REMARK 500    GLU B 209       -6.49     79.36                                   
REMARK 500    PHE B 211       -3.17     83.58                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: MAIN CHAIN PLANARITY                                       
REMARK 500                                                                      
REMARK 500 THE FOLLOWING RESIDUES HAVE A PSEUDO PLANARITY                       
REMARK 500 TORSION ANGLE, C(I) - CA(I) - N(I+1) - O(I), GREATER                 
REMARK 500 10.0 DEGREES. (M=MODEL NUMBER; RES=RESIDUE NAME;                     
REMARK 500 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;                            
REMARK 500 I=INSERTION CODE).                                                   
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        ANGLE                                           
REMARK 500    ILE A 195        -11.01                                           
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 A 303  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A 206   OD1                                                    
REMARK 620 2 POP A 301   O2  169.0                                              
REMARK 620 3 POP A 301   O5   93.4  95.2                                        
REMARK 620 4 HOH A2083   O    83.8  87.6 177.2                                  
REMARK 620 5 HOH A2084   O    92.3  94.3  92.6  87.2                            
REMARK 620 6 HOH A2102   O    91.2  82.0  88.6  91.7 176.2                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 302  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 POP A 301   O1                                                     
REMARK 620 2 POP A 301   O4  100.4                                              
REMARK 620 3 HOH A2062   O    84.4  81.6                                        
REMARK 620 4 HOH A2065   O   165.1  83.2  81.8                                  
REMARK 620 5 HOH A2099   O    95.2 164.1  97.2  80.9                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 303  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B 206   OD1                                                    
REMARK 620 2 POP B 301   O5   87.7                                              
REMARK 620 3 POP B 301   O2  166.7 104.2                                        
REMARK 620 4 HOH B2063   O    81.0  85.7  93.8                                  
REMARK 620 5 HOH B2064   O    80.5 165.2  86.8  83.7                            
REMARK 620 6 HOH B2078   O    95.5  95.4  89.4 176.3  94.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 302  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 POP B 301   O1                                                     
REMARK 620 2 POP B 301   O4   97.4                                              
REMARK 620 3 HOH B2049   O    95.5  89.1                                        
REMARK 620 4 HOH B2053   O   172.5  86.9  90.8                                  
REMARK 620 5 HOH B2054   O    89.2 171.7  85.3  87.1                            
REMARK 620 6 HOH B2077   O    90.3  91.1 174.2  83.5  93.9                      
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 A 302                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 303                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 302                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 303                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE XMP A 300                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE POP A 301                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE XMP B 300                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE POP B 301                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1DBR   RELATED DB: PDB                                   
REMARK 900 HYPOXANTHINE GUANINE XANTHINE                                        
REMARK 900 RELATED ID: 1HMP   RELATED DB: PDB                                   
REMARK 900 HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE                       
REMARK 900 RELATED ID: 1QK3   RELATED DB: PDB                                   
REMARK 900 HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE                       
REMARK 900 RELATED ID: 1QK4   RELATED DB: PDB                                   
REMARK 900 HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE                       
DBREF  1QK5 A    1   230  UNP    Q26997   HGXR_TOXGO       1    230             
DBREF  1QK5 B    1   230  UNP    Q26997   HGXR_TOXGO       1    230             
SEQADV 1QK5 GLY A    0A UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 SER A    0B UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 HIS A    0C UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 GLY B    0A UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 SER B    0B UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 HIS B    0C UNP  Q26997              CLONING ARTIFACT               
SEQADV 1QK5 ALA A  150  UNP  Q26997    ASP   150 ENGINEERED MUTATION            
SEQADV 1QK5 ALA B  150  UNP  Q26997    ASP   150 ENGINEERED MUTATION            
SEQRES   1 A  233  GLY SER HIS MET ALA SER LYS PRO ILE GLU ASP TYR GLY          
SEQRES   2 A  233  LYS GLY LYS GLY ARG ILE GLU PRO MET TYR ILE PRO ASP          
SEQRES   3 A  233  ASN THR PHE TYR ASN ALA ASP ASP PHE LEU VAL PRO PRO          
SEQRES   4 A  233  HIS CYS LYS PRO TYR ILE ASP LYS ILE LEU LEU PRO GLY          
SEQRES   5 A  233  GLY LEU VAL LYS ASP ARG VAL GLU LYS LEU ALA TYR ASP          
SEQRES   6 A  233  ILE HIS ARG THR TYR PHE GLY GLU GLU LEU HIS ILE ILE          
SEQRES   7 A  233  CYS ILE LEU LYS GLY SER ARG GLY PHE PHE ASN LEU LEU          
SEQRES   8 A  233  ILE ASP TYR LEU ALA THR ILE GLN LYS TYR SER GLY ARG          
SEQRES   9 A  233  GLU SER SER VAL PRO PRO PHE PHE GLU HIS TYR VAL ARG          
SEQRES  10 A  233  LEU LYS SER TYR GLN ASN ASP ASN SER THR GLY GLN LEU          
SEQRES  11 A  233  THR VAL LEU SER ASP ASP LEU SER ILE PHE ARG ASP LYS          
SEQRES  12 A  233  HIS VAL LEU ILE VAL GLU ASP ILE VAL ALA THR GLY PHE          
SEQRES  13 A  233  THR LEU THR GLU PHE GLY GLU ARG LEU LYS ALA VAL GLY          
SEQRES  14 A  233  PRO LYS SER MET ARG ILE ALA THR LEU VAL GLU LYS ARG          
SEQRES  15 A  233  THR ASP ARG SER ASN SER LEU LYS GLY ASP PHE VAL GLY          
SEQRES  16 A  233  PHE SER ILE GLU ASP VAL TRP ILE VAL GLY CYS CYS TYR          
SEQRES  17 A  233  ASP PHE ASN GLU MET PHE ARG ASP PHE ASP HIS VAL ALA          
SEQRES  18 A  233  VAL LEU SER ASP ALA ALA ARG LYS LYS PHE GLU LYS              
SEQRES   1 B  233  GLY SER HIS MET ALA SER LYS PRO ILE GLU ASP TYR GLY          
SEQRES   2 B  233  LYS GLY LYS GLY ARG ILE GLU PRO MET TYR ILE PRO ASP          
SEQRES   3 B  233  ASN THR PHE TYR ASN ALA ASP ASP PHE LEU VAL PRO PRO          
SEQRES   4 B  233  HIS CYS LYS PRO TYR ILE ASP LYS ILE LEU LEU PRO GLY          
SEQRES   5 B  233  GLY LEU VAL LYS ASP ARG VAL GLU LYS LEU ALA TYR ASP          
SEQRES   6 B  233  ILE HIS ARG THR TYR PHE GLY GLU GLU LEU HIS ILE ILE          
SEQRES   7 B  233  CYS ILE LEU LYS GLY SER ARG GLY PHE PHE ASN LEU LEU          
SEQRES   8 B  233  ILE ASP TYR LEU ALA THR ILE GLN LYS TYR SER GLY ARG          
SEQRES   9 B  233  GLU SER SER VAL PRO PRO PHE PHE GLU HIS TYR VAL ARG          
SEQRES  10 B  233  LEU LYS SER TYR GLN ASN ASP ASN SER THR GLY GLN LEU          
SEQRES  11 B  233  THR VAL LEU SER ASP ASP LEU SER ILE PHE ARG ASP LYS          
SEQRES  12 B  233  HIS VAL LEU ILE VAL GLU ASP ILE VAL ALA THR GLY PHE          
SEQRES  13 B  233  THR LEU THR GLU PHE GLY GLU ARG LEU LYS ALA VAL GLY          
SEQRES  14 B  233  PRO LYS SER MET ARG ILE ALA THR LEU VAL GLU LYS ARG          
SEQRES  15 B  233  THR ASP ARG SER ASN SER LEU LYS GLY ASP PHE VAL GLY          
SEQRES  16 B  233  PHE SER ILE GLU ASP VAL TRP ILE VAL GLY CYS CYS TYR          
SEQRES  17 B  233  ASP PHE ASN GLU MET PHE ARG ASP PHE ASP HIS VAL ALA          
SEQRES  18 B  233  VAL LEU SER ASP ALA ALA ARG LYS LYS PHE GLU LYS              
HET    XMP  A 300      24                                                       
HET    POP  A 301       9                                                       
HET     MG  A 302       1                                                       
HET     MG  A 303       1                                                       
HET    XMP  B 300      24                                                       
HET    POP  B 301       9                                                       
HET     MG  B 302       1                                                       
HET     MG  B 303       1                                                       
HETNAM     XMP XANTHOSINE-5'-MONOPHOSPHATE                                      
HETNAM     POP PYROPHOSPHATE 2-                                                 
HETNAM      MG MAGNESIUM ION                                                    
HETSYN     XMP 5-MONOPHOSPHATE-9-BETA-D-RIBOFURANOSYL XANTHINE                  
FORMUL   3  XMP    2(C10 H14 N4 O9 P 1+)                                        
FORMUL   4  POP    2(H2 O7 P2 2-)                                               
FORMUL   5   MG    4(MG 2+)                                                     
FORMUL  11  HOH   *182(H2 O)                                                    
HELIX    1   1 PRO A    5  TYR A    9  5                                   5    
HELIX    2   2 ASP A   30  PHE A   32  5                                   3    
HELIX    3   3 PRO A   48  PHE A   68  1                                  21    
HELIX    4   4 SER A   81  SER A   99  1                                  19    
HELIX    5   5 ASP A  133  ARG A  138  5                                   6    
HELIX    6   6 GLY A  152  ALA A  164  1                                  13    
HELIX    7   7 SER A  221  GLU A  229  1                                   9    
HELIX    8   8 PRO B    5  TYR B    9  5                                   5    
HELIX    9   9 ASP B   30  PHE B   32  5                                   3    
HELIX   10  10 CYS B   38  ILE B   42  5                                   5    
HELIX   11  11 PRO B   48  PHE B   68  1                                  21    
HELIX   12  12 SER B   81  SER B   99  1                                  19    
HELIX   13  13 ASP B  133  ARG B  138  5                                   6    
HELIX   14  14 GLY B  152  GLY B  166  1                                  15    
HELIX   15  15 SER B  221  PHE B  228  1                                   8    
SHEET    1   A 4 PHE A 109  ARG A 114  0                                        
SHEET    2   A 4 HIS A  73  LEU A  78  1  N  ILE A  74   O  PHE A 109           
SHEET    3   A 4 HIS A 141  GLU A 146  1  N  LEU A 143   O  HIS A  73           
SHEET    4   A 4 SER A 169  THR A 174  1  N  SER A 169   O  VAL A 142           
SHEET    1   B 2 VAL A 176  LYS A 178  0                                        
SHEET    2   B 2 PHE A 193  ILE A 195  1  N  PHE A 193   O  GLU A 177           
SHEET    1   C 5 THR B 128  SER B 131  0                                        
SHEET    2   C 5 PHE B 109  LYS B 116 -1  N  LYS B 116   O  THR B 128           
SHEET    3   C 5 LEU B  72  LEU B  78  1  N  ILE B  74   O  PHE B 109           
SHEET    4   C 5 HIS B 141  GLU B 146  1  N  HIS B 141   O  HIS B  73           
SHEET    5   C 5 SER B 169  THR B 174  1  N  SER B 169   O  VAL B 142           
SHEET    1   D 2 VAL B 176  LYS B 178  0                                        
SHEET    2   D 2 PHE B 193  ILE B 195  1  N  PHE B 193   O  GLU B 177           
LINK         OD1 ASP A 206                MG    MG A 303     1555   1555  2.13  
LINK         O1  POP A 301                MG    MG A 302     1555   1555  2.06  
LINK         O4  POP A 301                MG    MG A 302     1555   1555  2.09  
LINK         O2  POP A 301                MG    MG A 303     1555   1555  2.36  
LINK         O5  POP A 301                MG    MG A 303     1555   1555  2.09  
LINK        MG    MG A 302                 O   HOH A2062     1555   1555  2.38  
LINK        MG    MG A 302                 O   HOH A2065     1555   1555  2.26  
LINK        MG    MG A 302                 O   HOH A2099     1555   1555  2.16  
LINK        MG    MG A 303                 O   HOH A2083     1555   1555  2.23  
LINK        MG    MG A 303                 O   HOH A2084     1555   1555  2.02  
LINK        MG    MG A 303                 O   HOH A2102     1555   1555  2.16  
LINK         OD1 ASP B 206                MG    MG B 303     1555   1555  2.25  
LINK         O1  POP B 301                MG    MG B 302     1555   1555  2.09  
LINK         O4  POP B 301                MG    MG B 302     1555   1555  2.24  
LINK         O5  POP B 301                MG    MG B 303     1555   1555  2.00  
LINK         O2  POP B 301                MG    MG B 303     1555   1555  2.31  
LINK        MG    MG B 302                 O   HOH B2049     1555   1555  2.14  
LINK        MG    MG B 302                 O   HOH B2053     1555   1555  2.25  
LINK        MG    MG B 302                 O   HOH B2054     1555   1555  2.24  
LINK        MG    MG B 302                 O   HOH B2077     1555   1555  2.08  
LINK        MG    MG B 303                 O   HOH B2063     1555   1555  2.40  
LINK        MG    MG B 303                 O   HOH B2064     1555   1555  2.30  
LINK        MG    MG B 303                 O   HOH B2078     1555   1555  2.29  
CISPEP   1 LEU A   78    LYS A   79          0        -2.90                     
CISPEP   2 LEU B   78    LYS B   79          0        -8.25                     
SITE     1 AC1  5 XMP A 300  POP A 301  HOH A2062  HOH A2065                    
SITE     2 AC1  5 HOH A2099                                                     
SITE     1 AC2  5 ASP A 206  POP A 301  HOH A2083  HOH A2084                    
SITE     2 AC2  5 HOH A2102                                                     
SITE     1 AC3  5 POP B 301  HOH B2049  HOH B2053  HOH B2054                    
SITE     2 AC3  5 HOH B2077                                                     
SITE     1 AC4  5 ASP B 206  POP B 301  HOH B2063  HOH B2064                    
SITE     2 AC4  5 HOH B2078                                                     
SITE     1 AC5 19 ASP A 147  ILE A 148  ALA A 150  THR A 151                    
SITE     2 AC5 19 GLY A 152  PHE A 153  THR A 154  LYS A 178                    
SITE     3 AC5 19 TRP A 199  ILE A 200  TYR A 205  ASP A 206                    
SITE     4 AC5 19 POP A 301   MG A 302  HOH A2097  HOH A2098                    
SITE     5 AC5 19 HOH A2099  HOH A2100  HOH A2102                               
SITE     1 AC6 16 LYS A  79  GLY A  80  ARG A 114  LYS A 116                    
SITE     2 AC6 16 ASP A 206  ARG A 212  XMP A 300   MG A 302                    
SITE     3 AC6 16  MG A 303  HOH A2062  HOH A2065  HOH A2084                    
SITE     4 AC6 16 HOH A2086  HOH A2098  HOH A2101  HOH A2102                    
SITE     1 AC7 17 ASP B 147  ILE B 148  ALA B 150  THR B 151                    
SITE     2 AC7 17 GLY B 152  PHE B 153  THR B 154  LYS B 178                    
SITE     3 AC7 17 VAL B 198  TRP B 199  ILE B 200  TYR B 205                    
SITE     4 AC7 17 ASP B 206  POP B 301  HOH B2076  HOH B2077                    
SITE     5 AC7 17 HOH B2078                                                     
SITE     1 AC8 16 LYS B  79  GLY B  80  ARG B 114  LYS B 116                    
SITE     2 AC8 16 ASP B 206  ARG B 212  XMP B 300   MG B 302                    
SITE     3 AC8 16  MG B 303  HOH B2049  HOH B2053  HOH B2054                    
SITE     4 AC8 16 HOH B2063  HOH B2077  HOH B2079  HOH B2080                    
CRYST1   55.208  112.255  144.280  90.00  90.00  90.00 C 2 2 21     16          
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      0.018113  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.008908  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.006931        0.00000                         
MTRIX1   1 -0.951065  0.000778 -0.308991       65.00050    1                    
MTRIX2   1 -0.001881 -0.999993  0.003272       51.21940    1                    
MTRIX3   1 -0.308986  0.003693  0.951059       10.23740    1