HEADER    LYASE                                   08-MAY-07   2PTQ               
TITLE     CRYSTAL STRUCTURE OF ESCHERICHIA COLI ADENYLOSUCCINATE LYASE MUTANT    
TITLE    2 H171N WITH BOUND AMP AND FUMARATE                                     
COMPND    MOL_ID: 1;                                                             
COMPND   2 MOLECULE: ADENYLOSUCCINATE LYASE;                                     
COMPND   3 CHAIN: A, B;                                                          
COMPND   4 SYNONYM: ADENYLOSUCCINATE, ASL;                                       
COMPND   5 EC: 4.3.2.2;                                                          
COMPND   6 ENGINEERED: YES;                                                      
COMPND   7 MUTATION: YES                                                         
SOURCE    MOL_ID: 1;                                                             
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                                
SOURCE   3 ORGANISM_TAXID: 562;                                                  
SOURCE   4 GENE: PURB;                                                           
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                  
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                         
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21C+;                                     
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                               
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PET-28A                                    
KEYWDS    ADENYLOSUCCINATE LYASE, MUTANT-PRODUCT COMPLEX, LYASE                  
EXPDTA    X-RAY DIFFRACTION                                                      
AUTHOR    M.TSAI,P.L.HOWELL                                                      
REVDAT   7   03-APR-24 2PTQ    1       REMARK                                    
REVDAT   6   15-NOV-23 2PTQ    1       ATOM                                      
REVDAT   5   20-OCT-21 2PTQ    1       REMARK SEQADV                             
REVDAT   4   15-FEB-12 2PTQ    1       HET    HETATM HETNAM                      
REVDAT   3   13-JUL-11 2PTQ    1       VERSN                                     
REVDAT   2   24-FEB-09 2PTQ    1       VERSN                                     
REVDAT   1   03-JUL-07 2PTQ    0                                                 
JRNL        AUTH   M.TSAI,J.KOO,P.YIP,R.F.COLMAN,M.L.SEGALL,P.L.HOWELL           
JRNL        TITL   SUBSTRATE AND PRODUCT COMPLEXES OF ESCHERICHIA COLI           
JRNL        TITL 2 ADENYLOSUCCINATE LYASE PROVIDE NEW INSIGHTS INTO THE          
JRNL        TITL 3 ENZYMATIC MECHANISM.                                          
JRNL        REF    J.MOL.BIOL.                   V. 370   541 2007               
JRNL        REFN                   ISSN 0022-2836                                
JRNL        PMID   17531264                                                      
JRNL        DOI    10.1016/J.JMB.2007.04.052                                     
REMARK   2                                                                       
REMARK   2 RESOLUTION.    2.00 ANGSTROMS.                                        
REMARK   3                                                                       
REMARK   3 REFINEMENT.                                                           
REMARK   3   PROGRAM     : CNS                                                   
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-               
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,               
REMARK   3               : READ,RICE,SIMONSON,WARREN                             
REMARK   3                                                                       
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                     
REMARK   3                                                                       
REMARK   3  DATA USED IN REFINEMENT.                                             
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00                            
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 35.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                           
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                            
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                            
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 99.9                            
REMARK   3   NUMBER OF REFLECTIONS             : 67636                           
REMARK   3                                                                       
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                      
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                       
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                           
REMARK   3   R VALUE            (WORKING SET) : 0.175                            
REMARK   3   FREE R VALUE                     : 0.211                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                             
REMARK   3   FREE R VALUE TEST SET COUNT      : 3443                             
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) : 2.00                          
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.09                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 99.60                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2110                        
REMARK   3   BIN FREE R VALUE                    : 0.2380                        
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                          
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 420                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.012                         
REMARK   3                                                                       
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                     
REMARK   3   PROTEIN ATOMS            : 7260                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                        
REMARK   3   HETEROGEN ATOMS          : 62                                       
REMARK   3   SOLVENT ATOMS            : 650                                      
REMARK   3                                                                       
REMARK   3  B VALUES.                                                            
REMARK   3   FROM WILSON PLOT           (A**2) : 16.40                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 18.24                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                        
REMARK   3    B11 (A**2) : 1.31000                                               
REMARK   3    B22 (A**2) : -1.78000                                              
REMARK   3    B33 (A**2) : 0.47000                                               
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) : 0.18                             
REMARK   3   ESD FROM SIGMAA              (A) : 0.11                             
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                             
REMARK   3                                                                       
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                          
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.23                             
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.13                             
REMARK   3                                                                       
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                    
REMARK   3   BOND LENGTHS                 (A) : 0.005                            
REMARK   3   BOND ANGLES            (DEGREES) : 1.230                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 19.70                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.730                            
REMARK   3                                                                       
REMARK   3  ISOTROPIC THERMAL MODEL : OVERALL                                    
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  BULK SOLVENT MODELING.                                               
REMARK   3   METHOD USED : NULL                                                  
REMARK   3   KSOL        : NULL                                                  
REMARK   3   BSOL        : 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 2PTQ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                          
REMARK 100                                                                       
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 30-MAY-07.                   
REMARK 100 THE DEPOSITION ID IS D_1000042763.                                    
REMARK 200                                                                       
REMARK 200 EXPERIMENTAL DETAILS                                                  
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                   
REMARK 200  DATE OF DATA COLLECTION        : 01-APR-05                           
REMARK 200  TEMPERATURE           (KELVIN) : 100                                 
REMARK 200  PH                             : 8.5                                 
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                   
REMARK 200                                                                       
REMARK 200  SYNCHROTRON              (Y/N) : N                                   
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                      
REMARK 200  BEAMLINE                       : NULL                                
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU300                        
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                   
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                              
REMARK 200  MONOCHROMATOR                  : CONFOCAL MULTILAYER                 
REMARK 200  OPTICS                         : NULL                                
REMARK 200                                                                       
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                         
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IV                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : D*TREK                              
REMARK 200  DATA SCALING SOFTWARE          : D*TREK                              
REMARK 200                                                                       
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 67637                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.000                               
REMARK 200  RESOLUTION RANGE LOW       (A) : 35.000                              
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                               
REMARK 200                                                                       
REMARK 200 OVERALL.                                                              
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.9                                
REMARK 200  DATA REDUNDANCY                : 8.560                               
REMARK 200  R MERGE                    (I) : NULL                                
REMARK 200  R SYM                      (I) : 0.06700                             
REMARK 200   FOR THE DATA SET  : 19.9000                             
REMARK 200                                                                       
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.09                      
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.6                                
REMARK 200  DATA REDUNDANCY IN SHELL       : 8.38                                
REMARK 200  R MERGE FOR SHELL          (I) : NULL                                
REMARK 200  R SYM FOR SHELL            (I) : 0.25700                             
REMARK 200   FOR SHELL         : 7.400                               
REMARK 200                                                                       
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                               
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS             
REMARK 200 SOFTWARE USED: CNS                                                    
REMARK 200 STARTING MODEL: 2007-MAY-08.DEPOSIT.RCSB.ORG.80.SESSION.20619         
REMARK 200                                                                       
REMARK 200 REMARK: NULL                                                          
REMARK 280                                                                       
REMARK 280 CRYSTAL                                                               
REMARK 280 SOLVENT CONTENT, VS   (%): 47.78                                      
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.36                      
REMARK 280                                                                       
REMARK 280 CRYSTALLIZATION CONDITIONS: TRIS-HCL, SODIUM ACETATE TRI-HYDRATE,     
REMARK 280  PEG-4000, GLYCEROL, PH 8.5, VAPOR DIFFUSION, HANGING DROP,           
REMARK 280  TEMPERATURE 293K                                                     
REMARK 290                                                                       
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                             
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2                         
REMARK 290                                                                       
REMARK 290      SYMOP   SYMMETRY                                                 
REMARK 290     NNNMMM   OPERATOR                                                 
REMARK 290       1555   X,Y,Z                                                    
REMARK 290       2555   -X,-Y,Z                                                  
REMARK 290       3555   -X+1/2,Y+1/2,-Z                                          
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                          
REMARK 290                                                                       
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                      
REMARK 290           MMM -> TRANSLATION VECTOR                                   
REMARK 290                                                                       
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                             
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM              
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                 
REMARK 290 RELATED MOLECULES.                                                    
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000             
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000             
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000             
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000             
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000             
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000             
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000       49.56550             
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       71.71750             
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000             
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       49.56550             
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       71.71750             
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000             
REMARK 290                                                                       
REMARK 290 REMARK: NULL                                                          
REMARK 300                                                                       
REMARK 300 BIOMOLECULE: 1                                                        
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                 
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                   
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON                
REMARK 300 BURIED SURFACE AREA.                                                  
REMARK 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A HOMOTETRAMER GENERATED FROM      
REMARK 300 THE DIMER IN THE ASYMMETRIC UNIT BY THE OPERATIONS: -X, -Y, X.        
REMARK 350                                                                       
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN            
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                 
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS           
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                           
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                                
REMARK 350                                                                       
REMARK 350 BIOMOLECULE: 1                                                        
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TETRAMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                  
REMARK 350 SOFTWARE USED: PISA,PQS                                               
REMARK 350 TOTAL BURIED SURFACE AREA: 40250 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 52420 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -138.0 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 350   BIOMT1   2 -1.000000  0.000000  0.000000       99.13100             
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000        0.00000             
REMARK 350   BIOMT3   2  0.000000  0.000000  1.000000        0.00000             
REMARK 465                                                                       
REMARK 465 MISSING RESIDUES                                                      
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                        
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN                
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                 
REMARK 465                                                                       
REMARK 465   M RES C SSSEQI                                                      
REMARK 465     HIS A   460                                                       
REMARK 465     HIS A   461                                                       
REMARK 465     HIS A   462                                                       
REMARK 465     HIS B   459                                                       
REMARK 465     HIS B   460                                                       
REMARK 465     HIS B   461                                                       
REMARK 465     HIS B   462                                                       
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     ARG A 196    CG   CD   NE   CZ   NH1  NH2                         
REMARK 470     GLU A 223    CG   CD   OE1  OE2                                   
REMARK 470     GLU A 399    CG   CD   OE1  OE2                                   
REMARK 470     GLU A 407    CG   CD   OE1  OE2                                   
REMARK 470     ARG A 413    CG   CD   NE   CZ   NH1  NH2                         
REMARK 470     LYS A 420    CG   CD   CE   NZ                                    
REMARK 470     GLU A 430    CG   CD   OE1  OE2                                   
REMARK 470     GLU A 431    CG   CD   OE1  OE2                                   
REMARK 470     LYS B  54    CG   CD   CE   NZ                                    
REMARK 470     ARG B 413    CG   CD   NE   CZ   NH1  NH2                         
REMARK 470     GLU B 417    CG   CD   OE1  OE2                                   
REMARK 470     LYS B 420    CG   CD   CE   NZ                                    
REMARK 470     GLU B 431    CG   CD   OE1  OE2                                   
REMARK 500                                                                       
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                          
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                              
REMARK 500                                                                       
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC              
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15           
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A            
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375              
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE                
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.             
REMARK 500                                                                       
REMARK 500 DISTANCE CUTOFF:                                                      
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS               
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                   
REMARK 500                                                                       
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE           
REMARK 500   O    SER B   331     O    HOH B  2263     2655     2.19             
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    GLU A 249   N   -  CA  -  C   ANGL. DEV. = -16.4 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    VAL A 142      -59.83   -121.90                                    
REMARK 500    ILE A 207      110.80   -164.56                                    
REMARK 500    ASN A 208       23.37   -160.82                                    
REMARK 500    THR A 246     -136.71    -94.86                                    
REMARK 500    ASN A 282       31.25     71.22                                    
REMARK 500    TRP A 333     -126.19     48.70                                    
REMARK 500    ARG A 335      142.49    128.64                                    
REMARK 500    ASN A 370       79.45   -109.43                                    
REMARK 500    LYS A 400       50.84     37.44                                    
REMARK 500    ILE B  26      -59.16   -122.76                                    
REMARK 500    PHE B  74      118.84    -35.30                                    
REMARK 500    ILE B 207      108.42   -163.29                                    
REMARK 500    ASN B 208       18.71   -156.88                                    
REMARK 500    THR B 246     -140.49    -98.62                                    
REMARK 500    PRO B 329        0.58    -65.99                                    
REMARK 500    TRP B 333     -125.96     48.25                                    
REMARK 500    ARG B 335      141.10    127.50                                    
REMARK 500    LYS B 400       53.85     34.14                                    
REMARK 500                                                                       
REMARK 500 REMARK: NULL                                                          
REMARK 800                                                                       
REMARK 800 SITE                                                                  
REMARK 800 SITE_IDENTIFIER: AC1                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FUM B 1100                 
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC2                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FUM A 1200                 
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC3                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE AMP B 2100                 
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC4                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE AMP A 2200                 
REMARK 900                                                                       
REMARK 900 RELATED ENTRIES                                                       
REMARK 900 RELATED ID: 2PTR   RELATED DB: PDB                                    
REMARK 900 CRYSTAL STRUCTURE OF ESCHERICHIA COLI ADENYLOSUCCINATE LYASE MUTANT   
REMARK 900 H171A WITH BOUND ADENYLOSUCCINATE SUBSTRATE                           
REMARK 900 RELATED ID: 2PTS   RELATED DB: PDB                                    
REMARK 900 CRYSTAL STRUCTURE OF WILD TYPE ESCHERICHIA COLI ADENYLOSUCCINATE      
REMARK 900 LYASE                                                                 
DBREF  2PTQ A    1   456  UNP    P0AB89   PUR8_ECOLI       1    456              
DBREF  2PTQ B    1   456  UNP    P0AB89   PUR8_ECOLI       1    456              
SEQADV 2PTQ LEU A  154  UNP  P0AB89    ILE   154 CONFLICT                        
SEQADV 2PTQ ASN A  171  UNP  P0AB89    HIS   171 ENGINEERED MUTATION             
SEQADV 2PTQ HIS A  457  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS A  458  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS A  459  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS A  460  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS A  461  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS A  462  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ LEU B  154  UNP  P0AB89    ILE   154 CONFLICT                        
SEQADV 2PTQ ASN B  171  UNP  P0AB89    HIS   171 ENGINEERED MUTATION             
SEQADV 2PTQ HIS B  457  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS B  458  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS B  459  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS B  460  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS B  461  UNP  P0AB89              EXPRESSION TAG                  
SEQADV 2PTQ HIS B  462  UNP  P0AB89              EXPRESSION TAG                  
SEQRES   1 A  462  MET GLU LEU SER SER LEU THR ALA VAL SER PRO VAL ASP           
SEQRES   2 A  462  GLY ARG TYR GLY ASP LYS VAL SER ALA LEU ARG GLY ILE           
SEQRES   3 A  462  PHE SER GLU TYR GLY LEU LEU LYS PHE ARG VAL GLN VAL           
SEQRES   4 A  462  GLU VAL ARG TRP LEU GLN LYS LEU ALA ALA HIS ALA ALA           
SEQRES   5 A  462  ILE LYS GLU VAL PRO ALA PHE ALA ALA ASP ALA ILE GLY           
SEQRES   6 A  462  TYR LEU ASP ALA ILE VAL ALA SER PHE SER GLU GLU ASP           
SEQRES   7 A  462  ALA ALA ARG ILE LYS THR ILE GLU ARG THR THR ASN HIS           
SEQRES   8 A  462  ASP VAL LYS ALA VAL GLU TYR PHE LEU LYS GLU LYS VAL           
SEQRES   9 A  462  ALA GLU ILE PRO GLU LEU HIS ALA VAL SER GLU PHE ILE           
SEQRES  10 A  462  HIS PHE ALA CYS THR SER GLU ASP ILE ASN ASN LEU SER           
SEQRES  11 A  462  HIS ALA LEU MET LEU LYS THR ALA ARG ASP GLU VAL ILE           
SEQRES  12 A  462  LEU PRO TYR TRP ARG GLN LEU ILE ASP GLY LEU LYS ASP           
SEQRES  13 A  462  LEU ALA VAL GLN TYR ARG ASP ILE PRO LEU LEU SER ARG           
SEQRES  14 A  462  THR ASN GLY GLN PRO ALA THR PRO SER THR ILE GLY LYS           
SEQRES  15 A  462  GLU MET ALA ASN VAL ALA TYR ARG MET GLU ARG GLN TYR           
SEQRES  16 A  462  ARG GLN LEU ASN GLN VAL GLU ILE LEU GLY LYS ILE ASN           
SEQRES  17 A  462  GLY ALA VAL GLY ASN TYR ASN ALA HIS ILE ALA ALA TYR           
SEQRES  18 A  462  PRO GLU VAL ASP TRP HIS GLN PHE SER GLU GLU PHE VAL           
SEQRES  19 A  462  THR SER LEU GLY ILE GLN TRP ASN PRO TYR THR THR GLN           
SEQRES  20 A  462  ILE GLU PRO HIS ASP TYR ILE ALA GLU LEU PHE ASP CYS           
SEQRES  21 A  462  VAL ALA ARG PHE ASN THR ILE LEU ILE ASP PHE ASP ARG           
SEQRES  22 A  462  ASP VAL TRP GLY TYR ILE ALA LEU ASN HIS PHE LYS GLN           
SEQRES  23 A  462  LYS THR ILE ALA GLY GLU ILE GLY SER SER THR MET PRO           
SEQRES  24 A  462  HIS LYS VAL ASN PRO ILE ASP PHE GLU ASN SER GLU GLY           
SEQRES  25 A  462  ASN LEU GLY LEU SER ASN ALA VAL LEU GLN HIS LEU ALA           
SEQRES  26 A  462  SER LYS LEU PRO VAL SER ARG TRP GLN ARG ASP LEU THR           
SEQRES  27 A  462  ASP SER THR VAL LEU ARG ASN LEU GLY VAL GLY ILE GLY           
SEQRES  28 A  462  TYR ALA LEU ILE ALA TYR GLN SER THR LEU LYS GLY VAL           
SEQRES  29 A  462  SER LYS LEU GLU VAL ASN ARG ASP HIS LEU LEU ASP GLU           
SEQRES  30 A  462  LEU ASP HIS ASN TRP GLU VAL LEU ALA GLU PRO ILE GLN           
SEQRES  31 A  462  THR VAL MET ARG ARG TYR GLY ILE GLU LYS PRO TYR GLU           
SEQRES  32 A  462  LYS LEU LYS GLU LEU THR ARG GLY LYS ARG VAL ASP ALA           
SEQRES  33 A  462  GLU GLY MET LYS GLN PHE ILE ASP GLY LEU ALA LEU PRO           
SEQRES  34 A  462  GLU GLU GLU LYS ALA ARG LEU LYS ALA MET THR PRO ALA           
SEQRES  35 A  462  ASN TYR ILE GLY ARG ALA ILE THR MET VAL ASP GLU LEU           
SEQRES  36 A  462  LYS HIS HIS HIS HIS HIS HIS                                   
SEQRES   1 B  462  MET GLU LEU SER SER LEU THR ALA VAL SER PRO VAL ASP           
SEQRES   2 B  462  GLY ARG TYR GLY ASP LYS VAL SER ALA LEU ARG GLY ILE           
SEQRES   3 B  462  PHE SER GLU TYR GLY LEU LEU LYS PHE ARG VAL GLN VAL           
SEQRES   4 B  462  GLU VAL ARG TRP LEU GLN LYS LEU ALA ALA HIS ALA ALA           
SEQRES   5 B  462  ILE LYS GLU VAL PRO ALA PHE ALA ALA ASP ALA ILE GLY           
SEQRES   6 B  462  TYR LEU ASP ALA ILE VAL ALA SER PHE SER GLU GLU ASP           
SEQRES   7 B  462  ALA ALA ARG ILE LYS THR ILE GLU ARG THR THR ASN HIS           
SEQRES   8 B  462  ASP VAL LYS ALA VAL GLU TYR PHE LEU LYS GLU LYS VAL           
SEQRES   9 B  462  ALA GLU ILE PRO GLU LEU HIS ALA VAL SER GLU PHE ILE           
SEQRES  10 B  462  HIS PHE ALA CYS THR SER GLU ASP ILE ASN ASN LEU SER           
SEQRES  11 B  462  HIS ALA LEU MET LEU LYS THR ALA ARG ASP GLU VAL ILE           
SEQRES  12 B  462  LEU PRO TYR TRP ARG GLN LEU ILE ASP GLY LEU LYS ASP           
SEQRES  13 B  462  LEU ALA VAL GLN TYR ARG ASP ILE PRO LEU LEU SER ARG           
SEQRES  14 B  462  THR ASN GLY GLN PRO ALA THR PRO SER THR ILE GLY LYS           
SEQRES  15 B  462  GLU MET ALA ASN VAL ALA TYR ARG MET GLU ARG GLN TYR           
SEQRES  16 B  462  ARG GLN LEU ASN GLN VAL GLU ILE LEU GLY LYS ILE ASN           
SEQRES  17 B  462  GLY ALA VAL GLY ASN TYR ASN ALA HIS ILE ALA ALA TYR           
SEQRES  18 B  462  PRO GLU VAL ASP TRP HIS GLN PHE SER GLU GLU PHE VAL           
SEQRES  19 B  462  THR SER LEU GLY ILE GLN TRP ASN PRO TYR THR THR GLN           
SEQRES  20 B  462  ILE GLU PRO HIS ASP TYR ILE ALA GLU LEU PHE ASP CYS           
SEQRES  21 B  462  VAL ALA ARG PHE ASN THR ILE LEU ILE ASP PHE ASP ARG           
SEQRES  22 B  462  ASP VAL TRP GLY TYR ILE ALA LEU ASN HIS PHE LYS GLN           
SEQRES  23 B  462  LYS THR ILE ALA GLY GLU ILE GLY SER SER THR MET PRO           
SEQRES  24 B  462  HIS LYS VAL ASN PRO ILE ASP PHE GLU ASN SER GLU GLY           
SEQRES  25 B  462  ASN LEU GLY LEU SER ASN ALA VAL LEU GLN HIS LEU ALA           
SEQRES  26 B  462  SER LYS LEU PRO VAL SER ARG TRP GLN ARG ASP LEU THR           
SEQRES  27 B  462  ASP SER THR VAL LEU ARG ASN LEU GLY VAL GLY ILE GLY           
SEQRES  28 B  462  TYR ALA LEU ILE ALA TYR GLN SER THR LEU LYS GLY VAL           
SEQRES  29 B  462  SER LYS LEU GLU VAL ASN ARG ASP HIS LEU LEU ASP GLU           
SEQRES  30 B  462  LEU ASP HIS ASN TRP GLU VAL LEU ALA GLU PRO ILE GLN           
SEQRES  31 B  462  THR VAL MET ARG ARG TYR GLY ILE GLU LYS PRO TYR GLU           
SEQRES  32 B  462  LYS LEU LYS GLU LEU THR ARG GLY LYS ARG VAL ASP ALA           
SEQRES  33 B  462  GLU GLY MET LYS GLN PHE ILE ASP GLY LEU ALA LEU PRO           
SEQRES  34 B  462  GLU GLU GLU LYS ALA ARG LEU LYS ALA MET THR PRO ALA           
SEQRES  35 B  462  ASN TYR ILE GLY ARG ALA ILE THR MET VAL ASP GLU LEU           
SEQRES  36 B  462  LYS HIS HIS HIS HIS HIS HIS                                   
HET    FUM  A1200       8                                                        
HET    AMP  A2200      23                                                        
HET    FUM  B1100       8                                                        
HET    AMP  B2100      23                                                        
HETNAM     FUM FUMARIC ACID                                                      
HETNAM     AMP ADENOSINE MONOPHOSPHATE                                           
FORMUL   3  FUM    2(C4 H4 O4)                                                   
FORMUL   4  AMP    2(C10 H14 N5 O7 P)                                            
FORMUL   7  HOH   *650(H2 O)                                                     
HELIX    1   1 TYR A   16  LYS A   19  5                                   4     
HELIX    2   2 VAL A   20  GLY A   25  1                                   6     
HELIX    3   3 SER A   28  HIS A   50  1                                  23     
HELIX    4   4 ALA A   60  SER A   73  1                                  14     
HELIX    5   5 SER A   75  ASN A   90  1                                  16     
HELIX    6   6 HIS A   91  ALA A  105  1                                  15     
HELIX    7   7 ILE A  107  ALA A  112  1                                   6     
HELIX    8   8 VAL A  113  ILE A  117  5                                   5     
HELIX    9   9 THR A  122  VAL A  142  1                                  21     
HELIX   10  10 VAL A  142  TYR A  161  1                                  20     
HELIX   11  11 ILE A  180  VAL A  201  1                                  22     
HELIX   12  12 TYR A  214  TYR A  221  1                                   8     
HELIX   13  13 ASP A  225  LEU A  237  1                                  13     
HELIX   14  14 HIS A  251  LEU A  281  1                                  31     
HELIX   15  15 PRO A  304  LEU A  328  1                                  25     
HELIX   16  16 LEU A  337  ARG A  344  1                                   8     
HELIX   17  17 ASN A  345  LYS A  366  1                                  22     
HELIX   18  18 ASN A  370  ASP A  379  1                                  10     
HELIX   19  19 HIS A  380  VAL A  384  5                                   5     
HELIX   20  20 LEU A  385  TYR A  396  1                                  12     
HELIX   21  21 LYS A  400  ARG A  410  1                                  11     
HELIX   22  22 ASP A  415  GLY A  425  1                                  11     
HELIX   23  23 PRO A  429  MET A  439  1                                  11     
HELIX   24  24 THR A  440  TYR A  444  5                                   5     
HELIX   25  25 ARG A  447  LEU A  455  1                                   9     
HELIX   26  26 LYS A  456  HIS A  458  5                                   3     
HELIX   27  27 TYR B   16  ILE B   26  5                                  11     
HELIX   28  28 SER B   28  HIS B   50  1                                  23     
HELIX   29  29 ALA B   60  PHE B   74  1                                  15     
HELIX   30  30 SER B   75  ASN B   90  1                                  16     
HELIX   31  31 HIS B   91  ALA B  105  1                                  15     
HELIX   32  32 ILE B  107  ALA B  112  1                                   6     
HELIX   33  33 VAL B  113  ILE B  117  5                                   5     
HELIX   34  34 THR B  122  VAL B  142  1                                  21     
HELIX   35  35 VAL B  142  TYR B  161  1                                  20     
HELIX   36  36 ILE B  180  VAL B  201  1                                  22     
HELIX   37  37 TYR B  214  TYR B  221  1                                   8     
HELIX   38  38 ASP B  225  LEU B  237  1                                  13     
HELIX   39  39 HIS B  251  LEU B  281  1                                  31     
HELIX   40  40 PRO B  304  LEU B  328  1                                  25     
HELIX   41  41 LEU B  337  LEU B  343  1                                   7     
HELIX   42  42 ASN B  345  SER B  365  1                                  21     
HELIX   43  43 ASN B  370  ASP B  379  1                                  10     
HELIX   44  44 HIS B  380  VAL B  384  5                                   5     
HELIX   45  45 LEU B  385  TYR B  396  1                                  12     
HELIX   46  46 LYS B  400  ARG B  410  1                                  11     
HELIX   47  47 ASP B  415  GLY B  425  1                                  11     
HELIX   48  48 PRO B  429  MET B  439  1                                  11     
HELIX   49  49 ARG B  447  GLU B  454  1                                   8     
HELIX   50  50 LEU B  455  HIS B  458  5                                   4     
SHEET    1   A 2 PRO A 165  THR A 170  0                                         
SHEET    2   A 2 GLN A 173  THR A 179 -1  O  ALA A 175   N  SER A 168            
SHEET    1   B 2 LEU A 204  GLY A 205  0                                         
SHEET    2   B 2 GLN A 240  TRP A 241  1  O  GLN A 240   N  GLY A 205            
SHEET    1   C 2 PHE A 284  GLN A 286  0                                         
SHEET    2   C 2 LEU A 367  VAL A 369 -1  O  GLU A 368   N  LYS A 285            
SHEET    1   D 2 PRO B 165  THR B 170  0                                         
SHEET    2   D 2 GLN B 173  THR B 179 -1  O  ALA B 175   N  SER B 168            
SHEET    1   E 2 LEU B 204  GLY B 205  0                                         
SHEET    2   E 2 GLN B 240  TRP B 241  1  O  GLN B 240   N  GLY B 205            
SHEET    1   F 2 PHE B 284  GLN B 286  0                                         
SHEET    2   F 2 LEU B 367  VAL B 369 -1  O  GLU B 368   N  LYS B 285            
SITE     1 AC1 13 HIS A  91  THR A 122  SER A 123  THR A 170                     
SITE     2 AC1 13 ASN A 171  GLN A 247  AMP A2200  HOH A2211                     
SITE     3 AC1 13 SER B 295  SER B 296  MET B 298  LYS B 301                     
SITE     4 AC1 13 ASN B 303                                                      
SITE     1 AC2 13 SER A 295  SER A 296  MET A 298  LYS A 301                     
SITE     2 AC2 13 ASN A 303  HIS B  91  THR B 122  SER B 123                     
SITE     3 AC2 13 THR B 170  ASN B 171  GLN B 247  AMP B2100                     
SITE     4 AC2 13 HOH B2128                                                      
SITE     1 AC3 25 ARG A  15  TYR A  16  ASN A 303  ILE A 305                     
SITE     2 AC3 25 ASN A 309  FUM A1200  GLU B  86  ASN B  90                     
SITE     3 AC3 25 HIS B  91  ASP B  92  SER B 123  GLU B 124                     
SITE     4 AC3 25 ASN B 171  GLN B 247  ARG B 335  LEU B 337                     
SITE     5 AC3 25 SER B 340  THR B 341  ARG B 344  HOH B2119                     
SITE     6 AC3 25 HOH B2128  HOH B2171  HOH B2192  HOH B2242                     
SITE     7 AC3 25 HOH B2243                                                      
SITE     1 AC4 24 ASN A  90  HIS A  91  ASP A  92  SER A 123                     
SITE     2 AC4 24 GLU A 124  ASN A 171  GLN A 247  ARG A 335                     
SITE     3 AC4 24 LEU A 337  SER A 340  THR A 341  ARG A 344                     
SITE     4 AC4 24 HOH A2211  HOH A2249  HOH A2257  HOH A2270                     
SITE     5 AC4 24 HOH A2327  HOH A2414  ARG B  15  TYR B  16                     
SITE     6 AC4 24 ASN B 303  ILE B 305  ASN B 309  FUM B1100                     
CRYST1   99.131  143.435   69.483  90.00  90.00  90.00 P 21 21 2     8           
ORIGX1      1.000000  0.000000  0.000000        0.00000                          
ORIGX2      0.000000  1.000000  0.000000        0.00000                          
ORIGX3      0.000000  0.000000  1.000000        0.00000                          
SCALE1      0.010088  0.000000  0.000000        0.00000                          
SCALE2      0.000000  0.006972  0.000000        0.00000                          
SCALE3      0.000000  0.000000  0.014392        0.00000                          
END