HEADER    LIGASE                                  26-OCT-01   1K92              
TITLE     CRYSTAL STRUCTURE OF UNCOMPLEXED E. COLI ARGININOSUCCINATE SYNTHETASE 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ARGININOSUCCINATE SYNTHASE;                                
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: RESIDUES 1 TO 446;                                         
COMPND   5 SYNONYM: CITRULLINE--ASPARTATE LIGASE; ARGININOSUCCINATE SYNTHETASE; 
COMPND   6 EC: 6.3.4.5;                                                         
COMPND   7 ENGINEERED: YES;                                                     
COMPND   8 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 GENE: ARGG;                                                          
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BB101;                                     
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PET21B                                    
KEYWDS    N-TYPE ATP PYROPHOSPHATASE, LIGASE                                    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    C.T.LEMKE,P.L.HOWELL                                                  
REVDAT   7   07-FEB-24 1K92    1       REMARK SEQADV                            
REVDAT   6   16-NOV-11 1K92    1       HETATM                                   
REVDAT   5   13-JUL-11 1K92    1       VERSN                                    
REVDAT   4   24-FEB-09 1K92    1       VERSN                                    
REVDAT   3   01-APR-03 1K92    1       JRNL                                     
REVDAT   2   11-JAN-02 1K92    1       REMARK                                   
REVDAT   1   07-DEC-01 1K92    0                                                
JRNL        AUTH   C.T.LEMKE,P.L.HOWELL                                         
JRNL        TITL   THE 1.6 A CRYSTAL STRUCTURE OF E. COLI ARGININOSUCCINATE     
JRNL        TITL 2 SYNTHETASE SUGGESTS A CONFORMATIONAL CHANGE DURING           
JRNL        TITL 3 CATALYSIS.                                                   
JRNL        REF    STRUCTURE                     V.   9  1153 2001              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   11738042                                                     
JRNL        DOI    10.1016/S0969-2126(01)00683-9                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.60 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.0                                              
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                    
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 39.85                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 1602858.040                    
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 96.8                           
REMARK   3   NUMBER OF REFLECTIONS             : 68566                          
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) : 0.163                           
REMARK   3   FREE R VALUE                     : 0.188                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.100                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 6933                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.002                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.60                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.70                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 87.30                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 9207                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1860                       
REMARK   3   BIN FREE R VALUE                    : 0.2060                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 10.30                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 1059                         
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.006                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3459                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 31                                      
REMARK   3   SOLVENT ATOMS            : 495                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 17.90                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 21.40                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 6.40000                                              
REMARK   3    B22 (A**2) : 0.03000                                              
REMARK   3    B33 (A**2) : -6.43000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.14                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.08                            
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) : 0.17                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.10                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.014                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.500                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.60                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.060                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 1.130 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 1.760 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 1.920 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 2.860 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.37                                                 
REMARK   3   BSOL        : 56.00                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  3  : ION.PARAM                                      
REMARK   3  PARAMETER FILE  4  : ALL_ASS.PARAM                                  
REMARK   3  PARAMETER FILE  5  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : WATER_REP.TOP                                  
REMARK   3  TOPOLOGY FILE  3   : ION.TOP                                        
REMARK   3  TOPOLOGY FILE  4   : ALL_ASS.TOP                                    
REMARK   3  TOPOLOGY FILE  5   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1K92 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 31-OCT-01.                  
REMARK 100 THE DEPOSITION ID IS D_1000014712.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X8C                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.979055                           
REMARK 200  MONOCHROMATOR                  : GRAPHITE                           
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 70186                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.600                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.7                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
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) : 1.60                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.70                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 87.3                               
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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD                          
REMARK 200 SOFTWARE USED: PHASES                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 53.29                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.63                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM SULFATE, MES, PH 6.5, VAPOR     
REMARK 280  DIFFUSION, HANGING DROP AT 298K                                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 2 2 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,Y,-Z                                                 
REMARK 290       4555   X,-Y,-Z                                                 
REMARK 290       5555   X+1/2,Y+1/2,Z+1/2                                       
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290       8555   X+1/2,-Y+1/2,-Z+1/2                                     
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        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000       39.84950            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       52.91850            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       63.66650            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       39.84950            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       52.91850            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       63.66650            
REMARK 290   SMTRY1   7 -1.000000  0.000000  0.000000       39.84950            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000       52.91850            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       63.66650            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000       39.84950            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000       52.91850            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000       63.66650            
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 TETRAMER FROM THE MONOMER IN    
REMARK 300 THE ASYMMETRIC UNIT BY THE OPERATIONS: -X, -Y, Z AND X, -Y, -Z AND - 
REMARK 300 X, Y, -Z                                                             
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: 39710 ANGSTROM**2                         
REMARK 350 SURFACE AREA OF THE COMPLEX: 56080 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -419.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
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       79.69900            
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 350   BIOMT1   3 -1.000000  0.000000  0.000000       79.69900            
REMARK 350   BIOMT2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   3  0.000000  0.000000 -1.000000      127.33300            
REMARK 350   BIOMT1   4  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   4  0.000000  0.000000 -1.000000      127.33300            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375      HOH A 617  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 727  LIES ON A SPECIAL POSITION.                          
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     GLY A   445                                                      
REMARK 465     GLN A   446                                                      
REMARK 465     SER A   447                                                      
REMARK 465     VAL A   448                                                      
REMARK 465     GLU A   449                                                      
REMARK 465     HIS A   450                                                      
REMARK 465     HIS A   451                                                      
REMARK 465     HIS A   452                                                      
REMARK 465     HIS A   453                                                      
REMARK 465     HIS A   454                                                      
REMARK 465     HIS A   455                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     LYS A   5    CG   CD   CE   NZ                                   
REMARK 470     GLU A  50    CG   CD   OE1  OE2                                  
REMARK 470     LYS A 183    CG   CD   CE   NZ                                   
REMARK 470     GLU A 187    CG   CD   OE1  OE2                                  
REMARK 470     LYS A 390    CB   CG   CD   CE   NZ                              
REMARK 470     ASP A 392    CG   OD1  OD2                                       
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   NE   ARG A   344     O    HOH A   635              2.10            
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   NE   ARG A   324     O    HOH A   710     3656     2.02            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    SER A 430   C     ALA A 431   N       0.262                       
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    TRP A 156        1.94    -69.09                                   
REMARK 500    LEU A 165       53.47   -119.05                                   
REMARK 500    ALA A 203     -178.61     69.76                                   
REMARK 500    LYS A 204     -126.24     49.11                                   
REMARK 500    ALA A 293       68.97   -169.17                                   
REMARK 500    ARG A 364     -110.39   -117.41                                   
REMARK 500    SER A 376      132.64   -170.99                                   
REMARK 500    LYS A 390     -107.74     45.51                                   
REMARK 500    ASP A 392       94.21     49.46                                   
REMARK 500    SER A 430     -151.10    -89.01                                   
REMARK 500    SER A 433      -24.43     73.36                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: MAIN CHAIN PLANARITY                                       
REMARK 500                                                                      
REMARK 500 THE FOLLOWING RESIDUES HAVE A PSEUDO PLANARITY                       
REMARK 500 TORSION ANGLE, C(I) - CA(I) - N(I+1) - O(I), GREATER                 
REMARK 500 10.0 DEGREES. (M=MODEL NUMBER; RES=RESIDUE NAME;                     
REMARK 500 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;                            
REMARK 500 I=INSERTION CODE).                                                   
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        ANGLE                                           
REMARK 500    SER A 430         14.29                                           
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 SO4 A 603                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 604                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 605                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 606                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 602                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GOL A 501                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1K97   RELATED DB: PDB                                   
REMARK 900 2.0A STRUCTURE OF UNCOMPLEXED E. COLI ARGININOSUCCINATE SYNTHETASE   
DBREF  1K92 A    1   446  UNP    P0A6E4   ASSY_ECOLI       1    446             
SEQADV 1K92 SER A  447  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 VAL A  448  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 GLU A  449  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  450  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  451  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  452  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  453  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  454  UNP  P0A6E4              EXPRESSION TAG                 
SEQADV 1K92 HIS A  455  UNP  P0A6E4              EXPRESSION TAG                 
SEQRES   1 A  455  THR THR ILE LEU LYS HIS LEU PRO VAL GLY GLN ARG ILE          
SEQRES   2 A  455  GLY ILE ALA PHE SER GLY GLY LEU ASP THR SER ALA ALA          
SEQRES   3 A  455  LEU LEU TRP MET ARG GLN LYS GLY ALA VAL PRO TYR ALA          
SEQRES   4 A  455  TYR THR ALA ASN LEU GLY GLN PRO ASP GLU GLU ASP TYR          
SEQRES   5 A  455  ASP ALA ILE PRO ARG ARG ALA MET GLU TYR GLY ALA GLU          
SEQRES   6 A  455  ASN ALA ARG LEU ILE ASP CYS ARG LYS GLN LEU VAL ALA          
SEQRES   7 A  455  GLU GLY ILE ALA ALA ILE GLN CYS GLY ALA PHE HIS ASN          
SEQRES   8 A  455  THR THR GLY GLY LEU THR TYR PHE ASN THR THR PRO LEU          
SEQRES   9 A  455  GLY ARG ALA VAL THR GLY THR MET LEU VAL ALA ALA MET          
SEQRES  10 A  455  LYS GLU ASP GLY VAL ASN ILE TRP GLY ASP GLY SER THR          
SEQRES  11 A  455  TYR LYS GLY ASN ASP ILE GLU ARG PHE TYR ARG TYR GLY          
SEQRES  12 A  455  LEU LEU THR ASN ALA GLU LEU GLN ILE TYR LYS PRO TRP          
SEQRES  13 A  455  LEU ASP THR ASP PHE ILE ASP GLU LEU GLY GLY ARG HIS          
SEQRES  14 A  455  GLU MET SER GLU PHE MET ILE ALA CYS GLY PHE ASP TYR          
SEQRES  15 A  455  LYS MET SER VAL GLU LYS ALA TYR SER THR ASP SER ASN          
SEQRES  16 A  455  MET LEU GLY ALA THR HIS GLU ALA LYS ASP LEU GLU TYR          
SEQRES  17 A  455  LEU ASN SER SER VAL LYS ILE VAL ASN PRO ILE MET GLY          
SEQRES  18 A  455  VAL LYS PHE TRP ASP GLU SER VAL LYS ILE PRO ALA GLU          
SEQRES  19 A  455  GLU VAL THR VAL ARG PHE GLU GLN GLY HIS PRO VAL ALA          
SEQRES  20 A  455  LEU ASN GLY LYS THR PHE SER ASP ASP VAL GLU MET MET          
SEQRES  21 A  455  LEU GLU ALA ASN ARG ILE GLY GLY ARG HIS GLY LEU GLY          
SEQRES  22 A  455  MET SER ASP GLN ILE GLU ASN ARG ILE ILE GLU ALA LYS          
SEQRES  23 A  455  SER ARG GLY ILE TYR GLU ALA PRO GLY MET ALA LEU LEU          
SEQRES  24 A  455  HIS ILE ALA TYR GLU ARG LEU LEU THR GLY ILE HIS ASN          
SEQRES  25 A  455  GLU ASP THR ILE GLU GLN TYR HIS ALA HIS GLY ARG GLN          
SEQRES  26 A  455  LEU GLY ARG LEU LEU TYR GLN GLY ARG TRP PHE ASP SER          
SEQRES  27 A  455  GLN ALA LEU MET LEU ARG ASP SER LEU GLN ARG TRP VAL          
SEQRES  28 A  455  ALA SER GLN ILE THR GLY GLU VAL THR LEU GLU LEU ARG          
SEQRES  29 A  455  ARG GLY ASN ASP TYR SER ILE LEU ASN THR VAL SER GLU          
SEQRES  30 A  455  ASN LEU THR TYR LYS PRO GLU ARG LEU THR MET GLU LYS          
SEQRES  31 A  455  GLY ASP SER VAL PHE SER PRO ASP ASP ARG ILE GLY GLN          
SEQRES  32 A  455  LEU THR MET ARG ASN LEU ASP ILE THR ASP THR ARG GLU          
SEQRES  33 A  455  LYS LEU PHE GLY TYR ALA LYS THR GLY LEU LEU SER SER          
SEQRES  34 A  455  SER ALA ALA SER GLY VAL PRO GLN VAL GLU ASN LEU GLU          
SEQRES  35 A  455  ASN LYS GLY GLN SER VAL GLU HIS HIS HIS HIS HIS HIS          
HET    SO4  A 603       5                                                       
HET    SO4  A 604       5                                                       
HET    SO4  A 605       5                                                       
HET    SO4  A 606       5                                                       
HET    SO4  A 602       5                                                       
HET    GOL  A 501       6                                                       
HETNAM     SO4 SULFATE ION                                                      
HETNAM     GOL GLYCEROL                                                         
HETSYN     GOL GLYCERIN; PROPANE-1,2,3-TRIOL                                    
FORMUL   2  SO4    5(O4 S 2-)                                                   
FORMUL   7  GOL    C3 H8 O3                                                     
FORMUL   8  HOH   *495(H2 O)                                                    
HELIX    1   1 GLY A   20  LYS A   33  1                                  14    
HELIX    2   2 ASP A   53  GLY A   63  1                                  11    
HELIX    3   3 CYS A   72  GLY A   87  1                                  16    
HELIX    4   4 ASN A  100  ASP A  120  1                                  21    
HELIX    5   5 ASN A  134  ASN A  147  1                                  14    
HELIX    6   6 PRO A  155  LEU A  157  5                                   3    
HELIX    7   7 ASP A  158  LEU A  165  1                                   8    
HELIX    8   8 GLY A  167  CYS A  178  1                                  12    
HELIX    9   9 ALA A  203  TYR A  208  5                                   6    
HELIX   10  10 SER A  212  VAL A  216  5                                   5    
HELIX   11  11 ASP A  255  ARG A  269  1                                  15    
HELIX   12  12 ALA A  293  HIS A  311  1                                  19    
HELIX   13  13 ASN A  312  GLN A  332  1                                  21    
HELIX   14  14 ASP A  337  VAL A  351  1                                  15    
HELIX   15  15 ALA A  352  ILE A  355  5                                   4    
HELIX   16  16 SER A  396  MET A  406  1                                  11    
HELIX   17  17 ARG A  407  THR A  424  1                                  18    
SHEET    1   A 3 ILE A   3  LEU A   4  0                                        
SHEET    2   A 3 GLN A 151  TYR A 153  1  O  ILE A 152   N  LEU A   4           
SHEET    3   A 3 ILE A 124  GLY A 126  1  N  TRP A 125   O  GLN A 151           
SHEET    1   B 3 ARG A  12  ALA A  16  0                                        
SHEET    2   B 3 VAL A  36  ASN A  43  1  O  TYR A  38   N  ILE A  13           
SHEET    3   B 3 ASN A  66  ASP A  71  1  O  ILE A  70   N  THR A  41           
SHEET    1   C 2 THR A  92  THR A  93  0                                        
SHEET    2   C 2 LEU A  96  THR A  97 -1  O  LEU A  96   N  THR A  93           
SHEET    1   D 4 SER A 191  ASN A 195  0                                        
SHEET    2   D 4 GLY A 198  GLU A 202 -1  O  GLU A 202   N  SER A 191           
SHEET    3   D 4 LYS A 286  GLU A 292 -1  O  ILE A 290   N  HIS A 201           
SHEET    4   D 4 SER A 275  ASN A 280 -1  N  SER A 275   O  TYR A 291           
SHEET    1   E 4 HIS A 244  LEU A 248  0                                        
SHEET    2   E 4 GLU A 234  GLU A 241 -1  N  ARG A 239   O  ALA A 247           
SHEET    3   E 4 GLY A 357  LEU A 363 -1  O  LEU A 363   N  GLU A 234           
SHEET    4   E 4 TYR A 369  VAL A 375 -1  O  LEU A 372   N  THR A 360           
SITE     1 AC1  4 LEU A   4  LYS A   5  HIS A   6  HOH A 906                    
SITE     1 AC2  5 LYS A 382  ARG A 385  THR A 412  HOH A 802                    
SITE     2 AC2  5 HOH A 950                                                     
SITE     1 AC3  1 ARG A  73                                                     
SITE     1 AC4  8 TYR A  98  PRO A 103  ASN A 134  ARG A 138                    
SITE     2 AC4  8 TYR A 331  HOH A 830  HOH A 837  HOH A 920                    
SITE     1 AC5  5 LEU A  21  ARG A 168  TYR A 182  SER A 185                    
SITE     2 AC5  5 HOH A 905                                                     
SITE     1 AC6  7 GLN A  32  PHE A 174  GLU A 358  HOH A 784                    
SITE     2 AC6  7 HOH A 915  HOH A1019  HOH A1032                               
CRYST1   79.699  105.837  127.333  90.00  90.00  90.00 I 2 2 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      0.012547  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.009448  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.007853        0.00000