HEADER    LIGASE (SYNTHETASE)                     14-SEP-95   1ADE              
TITLE     STRUCTURE OF ADENYLOSUCCINATE SYNTHETASE PH 7 AT 25 DEGREES CELSIUS   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ADENYLOSUCCINATE SYNTHETASE;                               
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 EC: 6.3.4.4                                                          
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 STRAIN: PUR A STRAIN H1238;                                          
SOURCE   5 OTHER_DETAILS: COLI GENETIC STOCK CENTER, STRAIN NUMBER 5408. GIFT   
SOURCE   6 FROM DR. B. BACHMAN, GENETIC CENTER, YALE UNIVERSITY                 
KEYWDS    PURINE NUCLEOTIDE BIOSYNTHESIS, LIGASE, GTP-HYDROLYZING ENZYMES,      
KEYWDS   2 LIGASE (SYNTHETASE)                                                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.M.SILVA,B.W.POLAND,C.M.HOFFMAN,H.J.FROMM,R.B.HONZATKO               
REVDAT   4   07-FEB-24 1ADE    1       REMARK                                   
REVDAT   3   29-NOV-17 1ADE    1       HELIX                                    
REVDAT   2   24-FEB-09 1ADE    1       VERSN                                    
REVDAT   1   29-JAN-96 1ADE    0                                                
JRNL        AUTH   M.M.SILVA,B.W.POLAND,C.R.HOFFMAN,H.J.FROMM,R.B.HONZATKO      
JRNL        TITL   REFINED CRYSTAL STRUCTURES OF UNLIGATED ADENYLOSUCCINATE     
JRNL        TITL 2 SYNTHETASE FROM ESCHERICHIA COLI.                            
JRNL        REF    J.MOL.BIOL.                   V. 254   431 1995              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   7490761                                                      
JRNL        DOI    10.1006/JMBI.1995.0629                                       
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   B.W.POLAND,M.M.SILVA,M.A.SERRA,Y.CHO,K.H.KIM,E.M.S.HARRIS,   
REMARK   1  AUTH 2 R.B.HONZATKO                                                 
REMARK   1  TITL   CRYSTAL STRUCTURE OF ADENYLOSUCCINATE SYNTHETASE FROM        
REMARK   1  TITL 2 ESCHERICHIA COLI                                             
REMARK   1  REF    J.BIOL.CHEM.                  V. 268 25334 1993              
REMARK   1  REFN                   ISSN 0021-9258                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.00 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR                                               
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 5.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 174373                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.199                           
REMARK   3   FREE R VALUE                     : NULL                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : NULL                            
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           : NULL                         
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : NULL                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                         
REMARK   3   BIN FREE R VALUE                    : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                         
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            : 6642                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 574                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 27.00                          
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 COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.25                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.011                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.650                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.90                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.470                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                      
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
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  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1ADE COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 100 THE DEPOSITION ID IS D_1000170680.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
REMARK 200  TEMPERATURE           (KELVIN) : 298                                
REMARK 200  PH                             : 7.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : NULL                               
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : NULL                               
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : AREA DETECTOR                      
REMARK 200  DETECTOR MANUFACTURER          : XUONG-HAMLIN MULTIWIRE             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : NULL                               
REMARK 200  DATA SCALING SOFTWARE          : NULL                               
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 32567                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : NULL                               
REMARK 200  RESOLUTION RANGE LOW       (A) : NULL                               
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.0                               
REMARK 200  DATA REDUNDANCY                : 3.200                              
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: NULL                         
REMARK 200 SOFTWARE USED: X-PLOR                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 44.14                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.20                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.0                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-Z                                             
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       36.09000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: MTRIX                                                        
REMARK 300  THE TRANSFORMATIONS PRESENTED ON MTRIX RECORDS BELOW                
REMARK 300  DESCRIBE NON-CRYSTALLOGRAPHIC RELATIONSHIPS AMONG THE               
REMARK 300  VARIOUS DOMAINS IN THIS ENTRY.  APPLYING THE APPROPRIATE            
REMARK 300  MTRIX TRANSFORMATION TO THE RESIDUES LISTED FIRST WILL              
REMARK 300  YIELD APPROXIMATE COORDINATES FOR THE RESIDUES LISTED               
REMARK 300  SECOND.                                                             
REMARK 300                                                                      
REMARK 300            APPLIED TO           TRANSFORMED TO                       
REMARK 300  MTRIX      RESIDUES               RESIDUES         RMSD             
REMARK 300    M1   B    1  ..  B  431     A    1  ..  A  431   1.374            
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: 5400 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 32460 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 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 TURN                                                                 
REMARK 400  TURN_ID: T4, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES             
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T10, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T16, TYPE VIII (ONE OR MORE OF THE PHI, PSI                
REMARK 400  ANGLES DEVIATE BY MORE THAN PLUS,MINUS 45 DEGREE FROM               
REMARK 400  THE IDEAL VALUES USED BY WILMOT & THORNTON(1989)).                  
REMARK 400                                                                      
REMARK 400  TURN_ID: T28, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T29, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T4, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES             
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T10, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T16, TYPE VIII (ONE OR MORE OF THE PHI, PSI                
REMARK 400  ANGLES DEVIATE BY MORE THAN PLUS,MINUS 45 DEGREE FROM               
REMARK 400  THE IDEAL VALUES USED BY WILMOT & THORNTON(1989)).                  
REMARK 400                                                                      
REMARK 400  TURN_ID: T28, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 400                                                                      
REMARK 400  TURN_ID: T29, TYPE I (ONE OR MORE OF THE PHI, PSI ANGLES            
REMARK 400  DEVIATE BY MORE THAN PLUS, MINUS 45 DEGREE FROM THE IDEAL           
REMARK 400  VALUES USED BY WILMOT & THORNTON(1989)).                            
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   H2   GLY B     1     OXT  ALA B   431              1.30            
REMARK 500   OD2  ASP A   418     HG1  THR A   420              1.39            
REMARK 500   HZ2  LYS B   185     OD2  ASP B   189              1.41            
REMARK 500   HZ3  LYS B   400     OE1  GLU B   403              1.42            
REMARK 500  HH12  ARG B   316     O    THR B   356              1.44            
REMARK 500   O    GLY A   276    HH22  ARG A   306              1.44            
REMARK 500   HH   TYR A   269     OE1  GLU A   296              1.44            
REMARK 500   HZ1  LYS A   267     OE2  GLU A   296              1.45            
REMARK 500  HH11  ARG B   214     OD2  ASP B   216              1.45            
REMARK 500   H2   GLY A     1     O    ALA A   431              1.47            
REMARK 500   HZ3  LYS A   154     OD1  ASP A   195              1.48            
REMARK 500   O    ILE A    59    HH21  ARG A    96              1.49            
REMARK 500   OE2  GLU A   138    HH22  ARG B   144              1.49            
REMARK 500   O    GLU A    14     HG1  THR A   330              1.49            
REMARK 500   OE1  GLU B    25    HH21  ARG B   419              1.51            
REMARK 500   O    GLY B   276    HH22  ARG B   306              1.51            
REMARK 500   H    MET B   349     O    ARG B   353              1.52            
REMARK 500   OE2  GLU B   373    HH21  ARG B   401              1.53            
REMARK 500   OD2  ASP B   311     HH   TYR B   347              1.54            
REMARK 500   HZ3  LYS A   267     OG1  THR A   271              1.54            
REMARK 500   OD1  ASP A   153     HG1  THR A   156              1.55            
REMARK 500   H1   GLY B     1     O    PRO B   428              1.55            
REMARK 500   O    ALA B   158     HH   TYR B   183              1.55            
REMARK 500   H1   HOH B   670     O    HOH B   671              1.56            
REMARK 500   O    HOH B   544     H2   HOH B   604              1.56            
REMARK 500   OD2  ASP A   336     H    THR A   382              1.56            
REMARK 500   H    VAL B   341     O    MET B   375              1.57            
REMARK 500   H1   HOH A   504     O    HOH A   544              1.57            
REMARK 500   O    ILE B    45     H    GLU B    48              1.58            
REMARK 500  HH21  ARG B   147     O    HOH B   447              1.58            
REMARK 500   OD1  ASP A   150     HZ3  LYS A   160              1.58            
REMARK 500   O    HIS B    41     H    LEU B    52              1.58            
REMARK 500   O    SER A   323    HH11  ARG B   257              1.59            
REMARK 500   O    GLY B   337     HZ3  LYS B   339              1.59            
REMARK 500   O    ASN A   174     HZ2  LYS A   177              1.59            
REMARK 500   OE1  GLU B   159     HZ1  LYS B   162              1.60            
REMARK 500   O    VAL A   385     HG1  THR A   415              1.60            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
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   HZ3  LYS A   119     OE2  GLU A   354     2556     1.38            
REMARK 500   OD2  ASP A   188     HZ3  LYS B   292     2455     1.39            
REMARK 500   OE1  GLU A    62    HH22  ARG B   388     2555     1.51            
REMARK 500   OD2  ASP A   182     HZ2  LYS A   339     2556     1.55            
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    GLY A 302   N   -  CA  -  C   ANGL. DEV. =  19.7 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    GLN A  10     -125.85   -109.45                                   
REMARK 500    ASN A  38       20.43   -142.88                                   
REMARK 500    LYS A 124       36.70    -90.82                                   
REMARK 500    LEU A 151        3.68    -68.67                                   
REMARK 500    SER A 240       23.06    -77.59                                   
REMARK 500    PHE A 278       69.03   -163.86                                   
REMARK 500    ASP A 284     -158.83   -104.69                                   
REMARK 500    PHE A 297       11.09    -65.59                                   
REMARK 500    THR A 300      -47.00   -144.59                                   
REMARK 500    ARG A 303       30.21    -88.59                                   
REMARK 500    ARG A 304      168.36    173.81                                   
REMARK 500    ARG A 305      101.23   -168.14                                   
REMARK 500    ASP A 427      106.32     63.07                                   
REMARK 500    GLN B  10     -117.71   -112.86                                   
REMARK 500    ASN B  46       43.26     33.89                                   
REMARK 500    PRO B  92       72.74    -62.81                                   
REMARK 500    LYS B 124       45.23   -173.81                                   
REMARK 500    THR B 128      -39.86   -131.75                                   
REMARK 500    LEU B 227        5.27    -69.71                                   
REMARK 500    PHE B 278       76.70   -152.35                                   
REMARK 500    ALA B 299       19.41   -167.45                                   
REMARK 500    ASP B 351       31.85    -91.69                                   
REMARK 500    ASP B 364       70.79    -67.23                                   
REMARK 500    ARG B 426      -22.59   -141.60                                   
REMARK 500    ASP B 427      104.70     54.65                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  1ADE A    1   431  UNP    P0A7D4   PURA_ECOLI       1    431             
DBREF  1ADE B    1   431  UNP    P0A7D4   PURA_ECOLI       1    431             
SEQRES   1 A  431  GLY ASN ASN VAL VAL VAL LEU GLY THR GLN TRP GLY ASP          
SEQRES   2 A  431  GLU GLY LYS GLY LYS ILE VAL ASP LEU LEU THR GLU ARG          
SEQRES   3 A  431  ALA LYS TYR VAL VAL ARG TYR GLN GLY GLY HIS ASN ALA          
SEQRES   4 A  431  GLY HIS THR LEU VAL ILE ASN GLY GLU LYS THR VAL LEU          
SEQRES   5 A  431  HIS LEU ILE PRO SER GLY ILE LEU ARG GLU ASN VAL THR          
SEQRES   6 A  431  SER ILE ILE GLY ASN GLY VAL VAL LEU SER PRO ALA ALA          
SEQRES   7 A  431  LEU MET LYS GLU MET LYS GLU LEU GLU ASP ARG GLY ILE          
SEQRES   8 A  431  PRO VAL ARG GLU ARG LEU LEU LEU SER GLU ALA CYS PRO          
SEQRES   9 A  431  LEU ILE LEU ASP TYR HIS VAL ALA LEU ASP ASN ALA ARG          
SEQRES  10 A  431  GLU LYS ALA ARG GLY ALA LYS ALA ILE GLY THR THR GLY          
SEQRES  11 A  431  ARG GLY ILE GLY PRO ALA TYR GLU ASP LYS VAL ALA ARG          
SEQRES  12 A  431  ARG GLY LEU ARG VAL GLY ASP LEU PHE ASP LYS GLU THR          
SEQRES  13 A  431  PHE ALA GLU LYS LEU LYS GLU VAL MET GLU TYR HIS ASN          
SEQRES  14 A  431  PHE GLN LEU VAL ASN TYR TYR LYS ALA GLU ALA VAL ASP          
SEQRES  15 A  431  TYR GLN LYS VAL LEU ASP ASP THR MET ALA VAL ALA ASP          
SEQRES  16 A  431  ILE LEU THR SER MET VAL VAL ASP VAL SER ASP LEU LEU          
SEQRES  17 A  431  ASP GLN ALA ARG GLN ARG GLY ASP PHE VAL MET PHE GLU          
SEQRES  18 A  431  GLY ALA GLN GLY THR LEU LEU ASP ILE ASP HIS GLY THR          
SEQRES  19 A  431  TYR PRO TYR VAL THR SER SER ASN THR THR ALA GLY GLY          
SEQRES  20 A  431  VAL ALA THR GLY SER GLY LEU GLY PRO ARG TYR VAL ASP          
SEQRES  21 A  431  TYR VAL LEU GLY ILE LEU LYS ALA TYR SER THR ARG VAL          
SEQRES  22 A  431  GLY ALA GLY PRO PHE PRO THR GLU LEU PHE ASP GLU THR          
SEQRES  23 A  431  GLY GLU PHE LEU CYS LYS GLN GLY ASN GLU PHE GLY ALA          
SEQRES  24 A  431  THR THR GLY ARG ARG ARG ARG THR GLY TRP LEU ASP THR          
SEQRES  25 A  431  VAL ALA VAL ARG ARG ALA VAL GLN LEU ASN SER LEU SER          
SEQRES  26 A  431  GLY PHE CYS LEU THR LYS LEU ASP VAL LEU ASP GLY LEU          
SEQRES  27 A  431  LYS GLU VAL LYS LEU CYS VAL ALA TYR ARG MET PRO ASP          
SEQRES  28 A  431  GLY ARG GLU VAL THR THR THR PRO LEU ALA ALA ASP ASP          
SEQRES  29 A  431  TRP LYS GLY VAL GLU PRO ILE TYR GLU THR MET PRO GLY          
SEQRES  30 A  431  TRP SER GLU SER THR PHE GLY VAL LYS ASP ARG SER GLY          
SEQRES  31 A  431  LEU PRO GLN ALA ALA LEU ASN TYR ILE LYS ARG ILE GLU          
SEQRES  32 A  431  GLU LEU THR GLY VAL PRO ILE ASP ILE ILE SER THR GLY          
SEQRES  33 A  431  PRO ASP ARG THR GLU THR MET ILE LEU ARG ASP PRO PHE          
SEQRES  34 A  431  ASP ALA                                                      
SEQRES   1 B  431  GLY ASN ASN VAL VAL VAL LEU GLY THR GLN TRP GLY ASP          
SEQRES   2 B  431  GLU GLY LYS GLY LYS ILE VAL ASP LEU LEU THR GLU ARG          
SEQRES   3 B  431  ALA LYS TYR VAL VAL ARG TYR GLN GLY GLY HIS ASN ALA          
SEQRES   4 B  431  GLY HIS THR LEU VAL ILE ASN GLY GLU LYS THR VAL LEU          
SEQRES   5 B  431  HIS LEU ILE PRO SER GLY ILE LEU ARG GLU ASN VAL THR          
SEQRES   6 B  431  SER ILE ILE GLY ASN GLY VAL VAL LEU SER PRO ALA ALA          
SEQRES   7 B  431  LEU MET LYS GLU MET LYS GLU LEU GLU ASP ARG GLY ILE          
SEQRES   8 B  431  PRO VAL ARG GLU ARG LEU LEU LEU SER GLU ALA CYS PRO          
SEQRES   9 B  431  LEU ILE LEU ASP TYR HIS VAL ALA LEU ASP ASN ALA ARG          
SEQRES  10 B  431  GLU LYS ALA ARG GLY ALA LYS ALA ILE GLY THR THR GLY          
SEQRES  11 B  431  ARG GLY ILE GLY PRO ALA TYR GLU ASP LYS VAL ALA ARG          
SEQRES  12 B  431  ARG GLY LEU ARG VAL GLY ASP LEU PHE ASP LYS GLU THR          
SEQRES  13 B  431  PHE ALA GLU LYS LEU LYS GLU VAL MET GLU TYR HIS ASN          
SEQRES  14 B  431  PHE GLN LEU VAL ASN TYR TYR LYS ALA GLU ALA VAL ASP          
SEQRES  15 B  431  TYR GLN LYS VAL LEU ASP ASP THR MET ALA VAL ALA ASP          
SEQRES  16 B  431  ILE LEU THR SER MET VAL VAL ASP VAL SER ASP LEU LEU          
SEQRES  17 B  431  ASP GLN ALA ARG GLN ARG GLY ASP PHE VAL MET PHE GLU          
SEQRES  18 B  431  GLY ALA GLN GLY THR LEU LEU ASP ILE ASP HIS GLY THR          
SEQRES  19 B  431  TYR PRO TYR VAL THR SER SER ASN THR THR ALA GLY GLY          
SEQRES  20 B  431  VAL ALA THR GLY SER GLY LEU GLY PRO ARG TYR VAL ASP          
SEQRES  21 B  431  TYR VAL LEU GLY ILE LEU LYS ALA TYR SER THR ARG VAL          
SEQRES  22 B  431  GLY ALA GLY PRO PHE PRO THR GLU LEU PHE ASP GLU THR          
SEQRES  23 B  431  GLY GLU PHE LEU CYS LYS GLN GLY ASN GLU PHE GLY ALA          
SEQRES  24 B  431  THR THR GLY ARG ARG ARG ARG THR GLY TRP LEU ASP THR          
SEQRES  25 B  431  VAL ALA VAL ARG ARG ALA VAL GLN LEU ASN SER LEU SER          
SEQRES  26 B  431  GLY PHE CYS LEU THR LYS LEU ASP VAL LEU ASP GLY LEU          
SEQRES  27 B  431  LYS GLU VAL LYS LEU CYS VAL ALA TYR ARG MET PRO ASP          
SEQRES  28 B  431  GLY ARG GLU VAL THR THR THR PRO LEU ALA ALA ASP ASP          
SEQRES  29 B  431  TRP LYS GLY VAL GLU PRO ILE TYR GLU THR MET PRO GLY          
SEQRES  30 B  431  TRP SER GLU SER THR PHE GLY VAL LYS ASP ARG SER GLY          
SEQRES  31 B  431  LEU PRO GLN ALA ALA LEU ASN TYR ILE LYS ARG ILE GLU          
SEQRES  32 B  431  GLU LEU THR GLY VAL PRO ILE ASP ILE ILE SER THR GLY          
SEQRES  33 B  431  PRO ASP ARG THR GLU THR MET ILE LEU ARG ASP PRO PHE          
SEQRES  34 B  431  ASP ALA                                                      
FORMUL   3  HOH   *574(H2 O)                                                    
HELIX    1  H1 LYS A   16  ARG A   26  1                                  11    
HELIX    2 H1' SER A   57  LEU A   60  5                                   4    
HELIX    3  H2 PRO A   76  ASP A   88  1                                  13    
HELIX    4 H2' PRO A   92  ARG A   96  5                                   5    
HELIX    5  H3 ASP A  108  ALA A  120  1                                  13    
HELIX    6  H4 ILE A  133  ALA A  142  1                                  10    
HELIX    7 H5' VAL A  148  PHE A  152  5                                   5    
HELIX    8  H5 LYS A  154  TYR A  176  1                                  23    
HELIX    9  H6 TYR A  183  SER A  199  1                                  17    
HELIX   10  H7 VAL A  204  GLN A  213  1                                  10    
HELIX   11  H8 ALA A  245  SER A  252  1                                   8    
HELIX   12  H9 GLU A  285  GLN A  293  1                                   9    
HELIX   13 H10 THR A  312  ASN A  322  1                                  11    
HELIX   14 H10 LEU A  332  LEU A  335  5                                   4    
HELIX   15 H11 GLN A  393  THR A  406  1                                  14    
HELIX   16  H1 LYS B   16  ARG B   26  1                                  11    
HELIX   17 H1' SER B   57  LEU B   60  5                                   4    
HELIX   18  H2 PRO B   76  ASP B   88  1                                  13    
HELIX   19 H2' PRO B   92  ARG B   96  5                                   5    
HELIX   20  H3 ASP B  108  ALA B  120  1                                  13    
HELIX   21  H4 ILE B  133  ALA B  142  1                                  10    
HELIX   22 H5' VAL B  148  PHE B  152  5                                   5    
HELIX   23  H5 LYS B  154  TYR B  176  1                                  23    
HELIX   24  H6 TYR B  183  SER B  199  1                                  17    
HELIX   25  H7 VAL B  204  GLN B  213  1                                  10    
HELIX   26  H8 ALA B  245  SER B  252  1                                   8    
HELIX   27  H9 GLU B  285  GLN B  293  1                                   9    
HELIX   28 H10 THR B  312  ASN B  322  1                                  11    
HELIX   29 H10 LEU B  332  LEU B  335  5                                   4    
HELIX   30 H11 GLN B  393  THR B  406  1                                  14    
SHEET    1  A110 MET A 200  VAL A 202  0                                        
SHEET    2  A110 LEU A  97  LEU A  99  1  O  LEU A  99   N  VAL A 202           
SHEET    3  A110 THR A  65  GLY A  69  1  O  SER A  66   N  LEU A  98           
SHEET    4  A110 LYS A  28  ARG A  32  1  O  VAL A  30   N  ILE A  67           
SHEET    5  A110 PHE A 217  GLY A 222  1  O  MET A 219   N  VAL A  31           
SHEET    6  A110 ASN A   2  LEU A   7  1  N  VAL A   4   O  VAL A 218           
SHEET    7  A110 TYR A 261  ALA A 268  1  N  LEU A 263   O  VAL A   5           
SHEET    8  A110 SER A 325  THR A 330  1  N  CYS A 328   O  GLY A 264           
SHEET    9  A110 ASP A 411  ILE A 413  1  O  ILE A 412   N  LEU A 329           
SHEET   10  A110 MET A 423  LEU A 425 -1  O  MET A 423   N  ILE A 413           
SHEET    1  A2 2 ALA A  39  ILE A  45  0                                        
SHEET    2  A2 2 GLU A  48  HIS A  53 -1  N  LEU A  52   O  HIS A  41           
SHEET    1  A3 2 ARG A 306  GLY A 308  0                                        
SHEET    2  A3 2 SER A 270  ARG A 272 -1  O  SER A 270   N  GLY A 308           
SHEET    1  A4 3 GLU A 369  TRP A 378  0                                        
SHEET    2  A4 3 GLY A 337  MET A 349 -1  O  ALA A 346   N  ILE A 371           
SHEET    3  A4 3 GLU A 354  VAL A 355 -1  N  VAL A 355   O  TYR A 347           
SHEET    1  B110 MET B 200  VAL B 202  0                                        
SHEET    2  B110 LEU B  97  LEU B  99  1  O  LEU B  99   N  VAL B 202           
SHEET    3  B110 THR B  65  GLY B  69  1  O  SER B  66   N  LEU B  98           
SHEET    4  B110 LYS B  28  ARG B  32  1  O  VAL B  30   N  ILE B  67           
SHEET    5  B110 PHE B 217  GLY B 222  1  O  MET B 219   N  VAL B  31           
SHEET    6  B110 ASN B   2  LEU B   7  1  N  VAL B   4   O  VAL B 218           
SHEET    7  B110 TYR B 261  ALA B 268  1  N  LEU B 263   O  VAL B   5           
SHEET    8  B110 SER B 325  THR B 330  1  N  CYS B 328   O  GLY B 264           
SHEET    9  B110 ASP B 411  ILE B 413  1  O  ILE B 412   N  LEU B 329           
SHEET   10  B110 MET B 423  LEU B 425 -1  O  MET B 423   N  ILE B 413           
SHEET    1  B2 2 ALA B  39  ILE B  45  0                                        
SHEET    2  B2 2 GLU B  48  HIS B  53 -1  N  LEU B  52   O  HIS B  41           
SHEET    1  B3 2 ARG B 306  GLY B 308  0                                        
SHEET    2  B3 2 SER B 270  ARG B 272 -1  O  SER B 270   N  GLY B 308           
SHEET    1  B4 3 GLU B 369  TRP B 378  0                                        
SHEET    2  B4 3 GLY B 337  MET B 349 -1  O  ALA B 346   N  ILE B 371           
SHEET    3  B4 3 GLU B 354  VAL B 355 -1  N  VAL B 355   O  TYR B 347           
CISPEP   1 TYR A  235    PRO A  236          0         1.68                     
CISPEP   2 TYR B  235    PRO B  236          0         0.19                     
CRYST1   73.260   72.180   82.900  90.00 108.17  90.00 P 1 21 1      4          
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      0.013650  0.000000  0.004480        0.00000                         
SCALE2      0.000000  0.013854  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012696        0.00000                         
MTRIX1   1  0.544890 -0.210180 -0.811740        6.42500    1                    
MTRIX2   1 -0.199100 -0.972820  0.118240       14.55000    1                    
MTRIX3   1 -0.814530  0.097190 -0.571920        8.12700    1