PDB Short entry for 2GCT
HEADER    HYDROLASE/PEPTIDE                       04-SEP-90   2GCT              
TITLE     STRUCTURE OF GAMMA-CHYMOTRYPSIN IN THE RANGE PH 2.0 TO PH 10.5        
TITLE    2 SUGGESTS THAT GAMMA-CHYMOTRYPSIN IS A COVALENT ACYL-ENZYME ADDUCT AT 
TITLE    3 LOW PH                                                               
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: GAMMA-CHYMOTRYPSIN A;                                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 3.4.21.1;                                                        
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: GAMMA-CHYMOTRYPSIN A;                                      
COMPND   7 CHAIN: B;                                                            
COMPND   8 EC: 3.4.21.1;                                                        
COMPND   9 MOL_ID: 3;                                                           
COMPND  10 MOLECULE: GAMMA-CHYMOTRYPSIN A;                                      
COMPND  11 CHAIN: C;                                                            
COMPND  12 EC: 3.4.21.1;                                                        
COMPND  13 MOL_ID: 4;                                                           
COMPND  14 MOLECULE: TETRAPEPTIDE ADDUCT;                                       
COMPND  15 CHAIN: D;                                                            
COMPND  16 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: BOS TAURUS;                                     
SOURCE   3 ORGANISM_TAXID: 9913;                                                
SOURCE   4 MOL_ID: 2;                                                           
SOURCE   5 ORGANISM_SCIENTIFIC: BOS TAURUS;                                     
SOURCE   6 ORGANISM_TAXID: 9913;                                                
SOURCE   7 MOL_ID: 3;                                                           
SOURCE   8 ORGANISM_SCIENTIFIC: BOS TAURUS;                                     
SOURCE   9 ORGANISM_TAXID: 9913;                                                
SOURCE  10 MOL_ID: 4                                                            
KEYWDS    HYDROLASE, SERINE PROTEINASE, HYDROLASE-PEPTIDE COMPLEX               
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.M.DIXON,B.W.MATTHEWS                                                
REVDAT   4   13-JUL-11 2GCT    1       VERSN                                    
REVDAT   3   19-MAY-09 2GCT    1       REMARK                                   
REVDAT   2   24-FEB-09 2GCT    1       VERSN                                    
REVDAT   1   15-OCT-91 2GCT    0                                                
JRNL        AUTH   M.M.DIXON,R.G.BRENNAN,B.W.MATTHEWS                           
JRNL        TITL   STRUCTURE OF GAMMA-CHYMOTRYPSIN IN THE RANGE PH 2.0 TO PH    
JRNL        TITL 2 10.5 SUGGESTS THAT GAMMA-CHYMOTRYPSIN IS A COVALENT          
JRNL        TITL 3 ACYL-ENZYME ADDUCT AT LOW PH.                                
JRNL        REF    INT.J.BIOL.MACROMOL.          V.  13    89 1991              
JRNL        REFN                   ISSN 0141-8130                               
JRNL        PMID   1888717                                                      
JRNL        DOI    10.1016/0141-8130(91)90054-X                                 
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   M.M.DIXON,B.W.MATTHEWS                                       
REMARK   1  TITL   IS GAMMA-CHYMOTRYPSIN A TETRAPEPTIDE ACYL-ENZYME ADDUCT OF   
REMARK   1  TITL 2 GAMMA-CHYMOTRYPSIN?                                          
REMARK   1  REF    BIOCHEMISTRY                  V.  28  7033 1989              
REMARK   1  REFN                   ISSN 0006-2960                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.80 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : TNT                                                  
REMARK   3   AUTHORS     : TRONRUD,TEN EYCK,MATTHEWS                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 10.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : NULL                           
REMARK   3                                                                      
REMARK   3  USING DATA ABOVE SIGMA CUTOFF.                                      
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE     (WORKING + TEST SET) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.169                           
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                                                                      
REMARK   3  USING ALL DATA, NO SIGMA CUTOFF.                                    
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : NULL                   
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE                  (NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : NULL                   
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1766                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 10                                      
REMARK   3   SOLVENT ATOMS            : 131                                     
REMARK   3                                                                      
REMARK   3  WILSON B VALUE (FROM FCALC, A**2) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.    RMS    WEIGHT  COUNT           
REMARK   3   BOND LENGTHS                 (A) : 0.019 ; NULL  ; NULL            
REMARK   3   BOND ANGLES            (DEGREES) : 3.100 ; NULL  ; NULL            
REMARK   3   TORSION ANGLES         (DEGREES) : 18.100; 0.000 ; NULL            
REMARK   3   PSEUDOROTATION ANGLES  (DEGREES) : NULL  ; 0.000 ; NULL            
REMARK   3   TRIGONAL CARBON PLANES       (A) : 0.020 ; NULL  ; NULL            
REMARK   3   GENERAL PLANES               (A) : 0.021 ; NULL  ; NULL            
REMARK   3   ISOTROPIC THERMAL FACTORS (A**2) : NULL  ; 0.000 ; NULL            
REMARK   3   NON-BONDED CONTACTS          (A) : NULL  ; NULL  ; NULL            
REMARK   3                                                                      
REMARK   3  INCORRECT CHIRAL-CENTERS (COUNT) : 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  RESTRAINT LIBRARIES.                                                
REMARK   3   STEREOCHEMISTRY : NULL                                             
REMARK   3   ISOTROPIC THERMAL FACTOR RESTRAINTS : NULL                         
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2GCT COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
REMARK 200  TEMPERATURE           (KELVIN) : 285                                
REMARK 200  PH                             : 2.0                                
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          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.54                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : FILM                               
REMARK 200  DETECTOR MANUFACTURER          : KODAK                              
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : OSCTST                             
REMARK 200  DATA SCALING SOFTWARE          : AGROVATA/ROTAVATE                  
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : NULL                               
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     (%) : NULL                               
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) : 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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 47.19                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.33                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 2.0                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 42 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   -Y+1/2,X+1/2,Z+1/2                                      
REMARK 290       4555   Y+1/2,-X+1/2,Z+1/2                                      
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   Y,X,-Z                                                  
REMARK 290       8555   -Y,-X,-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  0.000000 -1.000000  0.000000       34.90000            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       34.90000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000       49.05000            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       34.90000            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       34.90000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       49.05000            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       34.90000            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       34.90000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000       49.05000            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       34.90000            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       34.90000            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000       49.05000            
REMARK 290   SMTRY1   7  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 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: OCTAMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: OCTAMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 18540 ANGSTROM**2                         
REMARK 350 SURFACE AREA OF THE COMPLEX: 17420 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -205.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D                            
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       69.80000            
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 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 THE GAMMA CHYMOTRYPSIN MOLECULE IS COMPRISED OF THREE                
REMARK 400 POLYPEPTIDE CHAINS WHICH ARE DERIVED FROM THE ZYMOGEN OF             
REMARK 400 THIS ENZYME BY EXCISION OF RESIDUES 14-15 AND 147-148.  TO           
REMARK 400 ASSIGN SEPARATE CHAIN IDENTIFIERS TO THE THREE CHAINS                
REMARK 400 WOULD OBSCURE THIS RELATIONSHIP AND SO THIS WAS NOT DONE.            
REMARK 400 CHAIN TERMINATOR RECORDS WERE INSERTED AFTER RESIDUES 146            
REMARK 400 AND 245 TO INDICATE EXPLICIT TERMINI AND THE SPECIAL CODE            
REMARK 400 EXC WAS USED IN THE SEQRES RECORDS TO DENOTE THE EXCISIONS.          
REMARK 400 RESIDUES 11 THROUGH 13 AND 149 THROUGH 150 ARE NOT VISIBLE           
REMARK 400 IN THE ELECTRON DENSITY MAP AND SO ARE OMITTED.  IN THE              
REMARK 400 ABSENCE OF RESIDUE 13 THE TER RECORD WHICH WOULD HAVE                
REMARK 400 APPEARED AFTER RESIDUE 13 IS ALSO OMITTED.                           
REMARK 400                                                                      
REMARK 400 RESIDUES B 500 - B 504 ARE A TETRAPEPTIDE BOUND IN THE               
REMARK 400 ACTIVE SITE, COVALENTLY LINKED TO OG OF SER 195 AS AN ACYL           
REMARK 400 ADDUCT.  IT IS, PRESUMABLY, AN AUTOLYTIC CLEAVAGE PRODUCT.           
REMARK 400 THE EXACT IDENTITY OF THE RESIDUES IS UNCERTAIN AS THE SIDE          
REMARK 400 CHAINS SEEM TO BE DISORDERED.  THE ATOM IDENTIFIED AS                
REMARK 400 C UNK B 500 IS ACTUALLY THE CARBONYL CARBON OF AN                    
REMARK 400 UNIDENTIFIED AMINO ACID NOT VISIBLE IN THE ELECTRON DENSITY          
REMARK 400 MAP.                                                                 
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    12                                                      
REMARK 465     LEU A    13                                                      
REMARK 465     ALA C   149                                                      
REMARK 465     ASN C   150                                                      
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     SER A  11    CA   C    O    CB   OG                              
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    HOH A    20     O    HOH B   624     5555     2.19            
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    GLU B  21   CD    GLU B  21   OE2     0.072                       
REMARK 500    GLU B  70   CD    GLU B  70   OE2     0.073                       
REMARK 500    ARG C 154   NE    ARG C 154   CZ      0.081                       
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    PRO A   8   N   -  CA  -  CB  ANGL. DEV. =   7.5 DEGREES          
REMARK 500    LEU A  10   CA  -  CB  -  CG  ANGL. DEV. = -15.2 DEGREES          
REMARK 500    LEU A  10   N   -  CA  -  C   ANGL. DEV. =  18.5 DEGREES          
REMARK 500    LEU A  10   O   -  C   -  N   ANGL. DEV. = -14.9 DEGREES          
REMARK 500    VAL B  65   CA  -  CB  -  CG2 ANGL. DEV. =  12.8 DEGREES          
REMARK 500    ASP B  72   CB  -  CG  -  OD1 ANGL. DEV. =   6.8 DEGREES          
REMARK 500    ASP B  72   CB  -  CG  -  OD2 ANGL. DEV. =  -8.3 DEGREES          
REMARK 500    SER B  75   C   -  N   -  CA  ANGL. DEV. =  15.3 DEGREES          
REMARK 500    LYS B  93   N   -  CA  -  CB  ANGL. DEV. =  12.2 DEGREES          
REMARK 500    ASP B 128   CB  -  CG  -  OD1 ANGL. DEV. =   5.8 DEGREES          
REMARK 500    ASP B 128   CB  -  CG  -  OD2 ANGL. DEV. =  -7.1 DEGREES          
REMARK 500    ARG B 145   CB  -  CA  -  C   ANGL. DEV. = -13.2 DEGREES          
REMARK 500    ARG B 145   CD  -  NE  -  CZ  ANGL. DEV. =  10.4 DEGREES          
REMARK 500    ARG C 154   NE  -  CZ  -  NH1 ANGL. DEV. =   5.5 DEGREES          
REMARK 500    LEU C 162   CB  -  CG  -  CD1 ANGL. DEV. = -11.1 DEGREES          
REMARK 500    ASP C 178   CB  -  CG  -  OD2 ANGL. DEV. =  -6.1 DEGREES          
REMARK 500    THR C 219   CA  -  CB  -  CG2 ANGL. DEV. =  -9.6 DEGREES          
REMARK 500    TYR C 228   CB  -  CG  -  CD1 ANGL. DEV. =  -4.4 DEGREES          
REMARK 500    PRO D 501   CB  -  CA  -  C   ANGL. DEV. = -15.9 DEGREES          
REMARK 500    PRO D 501   C   -  N   -  CD  ANGL. DEV. = -32.3 DEGREES          
REMARK 500    TYR D 504   CB  -  CG  -  CD2 ANGL. DEV. = -13.4 DEGREES          
REMARK 500    TYR D 504   CB  -  CG  -  CD1 ANGL. DEV. =   8.8 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    ASN B  48     -179.06   -173.35                                   
REMARK 500    LYS B  79       67.86   -102.98                                   
REMARK 500    SER C 214      -78.10   -116.03                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CHIRAL CENTERS                                             
REMARK 500                                                                      
REMARK 500 UNEXPECTED CONFIGURATION OF THE FOLLOWING CHIRAL                     
REMARK 500 CENTER(S) USING IMPROPER CA--C--CB--N CHIRALITY                      
REMARK 500 FOR AMINO ACIDS AND C1'--O4'--N1(N9)--C2' FOR                        
REMARK 500 NUCLEIC ACIDS OR EQUIVALENT ANGLE                                    
REMARK 500 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,A1,6X,F5.1,6X,A1,10X,A1,3X,A16)       
REMARK 500                                                                      
REMARK 500  M RES CSSEQI    IMPROPER   EXPECTED   FOUND DETAILS                 
REMARK 500    GLN A   7        24.4      L          L   OUTSIDE RANGE           
REMARK 500    LEU A  10        18.1      L          L   OUTSIDE RANGE           
REMARK 500    LYS B  36        24.7      L          L   OUTSIDE RANGE           
REMARK 500    VAL B  65        24.4      L          L   OUTSIDE RANGE           
REMARK 500    GLN B  73        20.6      L          L   OUTSIDE RANGE           
REMARK 500    SER B  75        23.2      L          L   OUTSIDE RANGE           
REMARK 500    SER B  92        19.7      L          L   OUTSIDE RANGE           
REMARK 500    ASP B 128        20.4      L          L   OUTSIDE RANGE           
REMARK 500    THR C 151        11.2      L          L   OUTSIDE RANGE           
REMARK 500    ASP C 178        24.1      L          L   OUTSIDE RANGE           
REMARK 500    VAL C 235        23.8      L          L   OUTSIDE RANGE           
REMARK 500    ASN C 245        24.6      L          L   OUTSIDE RANGE           
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 525                                                                      
REMARK 525 SOLVENT                                                              
REMARK 525                                                                      
REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT                    
REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST                  
REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT                 
REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE                       
REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER;                             
REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE                  
REMARK 525 NUMBER; I=INSERTION CODE):                                           
REMARK 525                                                                      
REMARK 525  M RES CSSEQI                                                        
REMARK 525    HOH C 285        DISTANCE =  5.14 ANGSTROMS                       
REMARK 700                                                                      
REMARK 700 SHEET                                                                
REMARK 700 THE SHEET PRESENTED AS *S1* ON SHEET RECORDS BELOW IS                
REMARK 700 ACTUALLY A SIX-STRANDED BETA-BARREL.  THIS IS REPRESENTED            
REMARK 700 BY A SEVEN-STRANDED SHEET IN WHICH THE FIRST AND LAST                
REMARK 700 STRANDS ARE IDENTICAL.                                               
REMARK 700 SHEET S2 OF THIS MOLECULE IS BIFURCATED.  IN ORDER TO                
REMARK 700 REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW, TWO               
REMARK 700 SHEETS ARE DEFINED.  STRANDS 1, 2, 3, 4, 5, AND 7 OF SHEETS          
REMARK 700 S2A AND S2B ARE IDENTICAL.                                           
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: CAT                                                 
REMARK 800 EVIDENCE_CODE: AUTHOR                                                
REMARK 800 SITE_DESCRIPTION: CATALYTIC CENTER OF THE MOLECULE                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BND                                                 
REMARK 800 EVIDENCE_CODE: AUTHOR                                                
REMARK 800 SITE_DESCRIPTION: SUBSTRATE BINDING SITE                             
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 B 600                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 B 601                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR CHAIN D OF TETRAPEPTIDE ADDUCT    
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1GCT   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 3GCT   RELATED DB: PDB                                   
DBREF  2GCT A    1    13  UNP    P00766   CTRA_BOVIN       1     13             
DBREF  2GCT B   16   146  UNP    P00766   CTRA_BOVIN      16    146             
DBREF  2GCT C  149   245  UNP    P00766   CTRA_BOVIN     149    245             
DBREF  2GCT D  500   504  PDB    2GCT     2GCT           500    504             
SEQRES   1 A   13  CYS GLY VAL PRO ALA ILE GLN PRO VAL LEU SER GLY LEU          
SEQRES   1 B  131  ILE VAL ASN GLY GLU GLU ALA VAL PRO GLY SER TRP PRO          
SEQRES   2 B  131  TRP GLN VAL SER LEU GLN ASP LYS THR GLY PHE HIS PHE          
SEQRES   3 B  131  CYS GLY GLY SER LEU ILE ASN GLU ASN TRP VAL VAL THR          
SEQRES   4 B  131  ALA ALA HIS CYS GLY VAL THR THR SER ASP VAL VAL VAL          
SEQRES   5 B  131  ALA GLY GLU PHE ASP GLN GLY SER SER SER GLU LYS ILE          
SEQRES   6 B  131  GLN LYS LEU LYS ILE ALA LYS VAL PHE LYS ASN SER LYS          
SEQRES   7 B  131  TYR ASN SER LEU THR ILE ASN ASN ASP ILE THR LEU LEU          
SEQRES   8 B  131  LYS LEU SER THR ALA ALA SER PHE SER GLN THR VAL SER          
SEQRES   9 B  131  ALA VAL CYS LEU PRO SER ALA SER ASP ASP PHE ALA ALA          
SEQRES  10 B  131  GLY THR THR CYS VAL THR THR GLY TRP GLY LEU THR ARG          
SEQRES  11 B  131  TYR                                                          
SEQRES   1 C   97  ALA ASN THR PRO ASP ARG LEU GLN GLN ALA SER LEU PRO          
SEQRES   2 C   97  LEU LEU SER ASN THR ASN CYS LYS LYS TYR TRP GLY THR          
SEQRES   3 C   97  LYS ILE LYS ASP ALA MET ILE CYS ALA GLY ALA SER GLY          
SEQRES   4 C   97  VAL SER SER CYS MET GLY ASP SER GLY GLY PRO LEU VAL          
SEQRES   5 C   97  CYS LYS LYS ASN GLY ALA TRP THR LEU VAL GLY ILE VAL          
SEQRES   6 C   97  SER TRP GLY SER SER THR CYS SER THR SER THR PRO GLY          
SEQRES   7 C   97  VAL TYR ALA ARG VAL THR ALA LEU VAL ASN TRP VAL GLN          
SEQRES   8 C   97  GLN THR LEU ALA ALA ASN                                      
SEQRES   1 D    5  UNK PRO GLY ALA TYR                                          
HET    SO4  B 600       5                                                       
HET    SO4  B 601       5                                                       
HETNAM     SO4 SULFATE ION                                                      
FORMUL   5  SO4    2(O4 S 2-)                                                   
FORMUL   7  HOH   *131(H2 O)                                                    
HELIX    1  H1 ASN C  167  ILE C  176  1                                  10    
HELIX    2  H2 VAL C  231  ASN C  245  1                                  15    
SHEET    1  S1 7 PRO B  28  ASP B  35  0                                        
SHEET    2  S1 7 CYS B  42  GLU B  49 -1  O  GLY B  44   N  VAL B  31           
SHEET    3  S1 7 ASN B  50  ALA B  56 -1  N  VAL B  53   O  SER B  45           
SHEET    4  S1 7 ASN B 101  THR B 110 -1  O  THR B 104   N  THR B  54           
SHEET    5  S1 7 GLN B  81  SER B  92 -1  N  PHE B  89   O  LEU B 105           
SHEET    6  S1 7 SER B  63  GLY B  69 -1  N  VAL B  66   O  LEU B  83           
SHEET    7  S1 7 PRO B  28  ASP B  35 -1  N  GLN B  34   O  VAL B  65           
SHEET    1 S2A 7 GLY B 133  TRP B 141  0                                        
SHEET    2 S2A 7 LEU C 155  LEU C 162 -1  N  GLN C 157   O  THR B 138           
SHEET    3 S2A 7 ALA C 179  SER C 186 -1  N  GLY C 184   O  PRO C 161           
SHEET    4 S2A 7 SER C 223  ALA C 229 -1  N  GLY C 226   O  ALA C 183           
SHEET    5 S2A 7 ILE C 212  SER C 218 -1  N  ILE C 212   O  ALA C 229           
SHEET    6 S2A 7 GLY C 193  CYS C 201 -1  O  GLY C 197   N  VAL C 213           
SHEET    7 S2A 7 GLY B 133  TRP B 141 -1  N  VAL B 137   O  CYS C 201           
SHEET    1 S2B 7 GLY B 133  TRP B 141  0                                        
SHEET    2 S2B 7 LEU C 155  LEU C 162 -1  N  GLN C 157   O  THR B 138           
SHEET    3 S2B 7 ALA C 179  SER C 186 -1  N  GLY C 184   O  PRO C 161           
SHEET    4 S2B 7 SER C 223  ALA C 229 -1  N  GLY C 226   O  ALA C 183           
SHEET    5 S2B 7 ILE C 212  SER C 218 -1  N  ILE C 212   O  ALA C 229           
SHEET    6 S2B 7 GLY D 502  ALA D 503 -1  N  GLY D 502   O  GLY C 216           
SHEET    7 S2B 7 GLY B 133  TRP B 141 -1                                        
SSBOND   1 CYS A    1    CYS B  122                          1555   1555  1.98  
SSBOND   2 CYS B   42    CYS B   58                          1555   1555  1.95  
SSBOND   3 CYS B  136    CYS C  201                          1555   1555  1.95  
SSBOND   4 CYS C  168    CYS C  182                          1555   1555  1.97  
SSBOND   5 CYS C  191    CYS C  220                          1555   1555  2.06  
LINK         OG  SER C 195                 C   TYR D 504     1555   1555  1.56  
SITE     1 CAT  3 HIS B  57  ASP B 102  SER C 195                               
SITE     1 BND  9 SER C 190  CYS C 191  MET C 192  VAL C 213                    
SITE     2 BND  9 SER C 214  TRP C 215  SER C 218  CYS C 220                    
SITE     3 BND  9 TYR C 228                                                     
SITE     1 AC1  5 HOH A  16  LYS B  36  SER B  92  HOH B 627                    
SITE     2 AC1  5 TRP C 237                                                     
SITE     1 AC2  4 HIS B  40  GLU B  70  GLN B  73  LYS B  82                    
SITE     1 AC3 13 LYS C 175  SER C 190  MET C 192  GLY C 193                    
SITE     2 AC3 13 ASP C 194  SER C 195  SER C 214  TRP C 215                    
SITE     3 AC3 13 GLY C 216  SER C 217  HOH C 280  HOH D 505                    
SITE     4 AC3 13 HOH D 506                                                     
CRYST1   69.800   69.800   98.100  90.00  90.00  90.00 P 42 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      0.014327  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.014327  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010194        0.00000