HEADER    HYDROLASE/HYDROLASE INHIBITOR           02-MAY-99   1EKB              
TITLE     THE SERINE PROTEASE DOMAIN OF ENTEROPEPTIDASE BOUND TO INHIBITOR VAL- 
TITLE    2 ASP-ASP-ASP-ASP-LYS-CHLOROMETHANE                                    
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ENTEROPEPTIDASE;                                           
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: 13-AMINO ACID REMNANT OF AMINO TERMINAL DOMAIN OF HEAVY    
COMPND   5 CHAIN;                                                               
COMPND   6 SYNONYM: ENTEROKINASE, HEAVY CHAIN;                                  
COMPND   7 EC: 3.4.21.9;                                                        
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MOL_ID: 2;                                                           
COMPND  10 MOLECULE: ENTEROPEPTIDASE;                                           
COMPND  11 CHAIN: B;                                                            
COMPND  12 FRAGMENT: SERINE PROTEASE DOMAIN OR LIGHT CHAIN;                     
COMPND  13 SYNONYM: ENTEROKINASE, LIGHT CHAIN;                                  
COMPND  14 EC: 3.4.21.9;                                                        
COMPND  15 ENGINEERED: YES;                                                     
COMPND  16 MOL_ID: 3;                                                           
COMPND  17 MOLECULE: VAL-ASP-ASP-ASP-ASP-LYK PEPTIDE;                           
COMPND  18 CHAIN: C;                                                            
COMPND  19 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: BOS TAURUS;                                     
SOURCE   3 ORGANISM_COMMON: CATTLE;                                             
SOURCE   4 ORGANISM_TAXID: 9913;                                                
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PETL;                                     
SOURCE  10 MOL_ID: 2;                                                           
SOURCE  11 ORGANISM_SCIENTIFIC: BOS TAURUS;                                     
SOURCE  12 ORGANISM_COMMON: CATTLE;                                             
SOURCE  13 ORGANISM_TAXID: 9913;                                                
SOURCE  14 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE  15 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE  16 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE  17 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  18 EXPRESSION_SYSTEM_PLASMID: PETL;                                     
SOURCE  19 MOL_ID: 3;                                                           
SOURCE  20 SYNTHETIC: YES                                                       
KEYWDS    ENTEROPEPTIDASE, TRYPSINOGEN ACTIVATION, HYDROLASE-HYDROLASE          
KEYWDS   2 INHIBITOR COMPLEX                                                    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    K.FUETTERER,D.LU,J.E.SADLER,G.WAKSMAN                                 
REVDAT   6   06-NOV-24 1EKB    1       REMARK                                   
REVDAT   5   02-AUG-23 1EKB    1       REMARK LINK                              
REVDAT   4   13-JUL-11 1EKB    1       VERSN                                    
REVDAT   3   24-FEB-09 1EKB    1       VERSN                                    
REVDAT   2   01-APR-03 1EKB    1       JRNL                                     
REVDAT   1   14-OCT-99 1EKB    0                                                
JRNL        AUTH   D.LU,K.FUTTERER,S.KOROLEV,X.ZHENG,K.TAN,G.WAKSMAN,J.E.SADLER 
JRNL        TITL   CRYSTAL STRUCTURE OF ENTEROPEPTIDASE LIGHT CHAIN COMPLEXED   
JRNL        TITL 2 WITH AN ANALOG OF THE TRYPSINOGEN ACTIVATION PEPTIDE.        
JRNL        REF    J.MOL.BIOL.                   V. 292   361 1999              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   10493881                                                     
JRNL        DOI    10.1006/JMBI.1999.3089                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.30 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 0.5                                              
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 : NULL                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 92.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 10400                          
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) : 0.234                           
REMARK   3   FREE R VALUE                     : 0.269                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 4.900                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 546                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.012                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 8                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.30                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.40                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 88.30                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 1142                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2950                       
REMARK   3   BIN FREE R VALUE                    : 0.3670                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 5.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 70                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.044                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1911                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 2                                       
REMARK   3   SOLVENT ATOMS            : 108                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 32.20                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 23.80                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.32                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.28                            
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) : 0.41                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.39                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.006                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.400                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 25.40                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.730                           
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) : 1.480 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.040 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 2.470 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 3.000 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.35                                                 
REMARK   3   BSOL        : 24.18                                                
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_CH2.PARAM                          
REMARK   3  PARAMETER FILE  2  : WATER.PARAM                                    
REMARK   3  PARAMETER FILE  3  : ION.PARAM                                      
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN_CH2.TOP                                
REMARK   3  TOPOLOGY FILE  2   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  3   : ION.TOP                                        
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1EKB COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY NDB.                                
REMARK 100 THE DEPOSITION ID IS D_1000000986.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-APR-98                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 7.5                                
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 RU200                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : GRAPHITE                           
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU                             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 10541                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.300                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 1.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 92.6                               
REMARK 200  DATA REDUNDANCY                : 3.000                              
REMARK 200  R MERGE                    (I) : 0.04400                            
REMARK 200  R SYM                      (I) : 0.04400                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 10.0000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.30                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.38                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 89.2                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.00                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.08800                            
REMARK 200  R SYM FOR SHELL            (I) : 0.08800                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.000                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: PDB ENTRY 1GCD                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 40.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.12                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.5                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
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       19.99500            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       42.61000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       35.32500            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       42.61000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       19.99500            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       35.32500            
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 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: TRIMERIC                          
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TRIMERIC                   
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2010 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 10270 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -59.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C                               
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 VAL-ASP-ASP-ASP-ASP-LYK-CHLOROMETHANE (CHAIN C) HAS FORMED           
REMARK 400 CONNECTIONS TO ENTEROPETPIDASE: 1) VIA A HEMIKETAL GROUP             
REMARK 400 FROM FROM C OF LYK C 306 TO OG OF SER B 195. 2) VIA A                
REMARK 400 METHYLENE GROUP FROM 0QE C 307 TO NE2 OF HIS B 57.                   
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     GLN A     8                                                      
REMARK 465     GLU A     9                                                      
REMARK 465     VAL A    10                                                      
REMARK 465     SER A    11                                                      
REMARK 465     PRO A    12                                                      
REMARK 465     LYS A    13                                                      
REMARK 465     VAL C   301                                                      
REMARK 465     ASP C   302                                                      
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   3    CG   CD   CE   NZ                                   
REMARK 470     ARG B  97    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ASN B 205    CG   OD1  ND2                                       
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   OG   SER B   195     O    LYK C   306              2.03            
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    LEU B 199   N   -  CA  -  C   ANGL. DEV. = -16.7 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ARG B  60F      47.60   -160.29                                   
REMARK 500    GLU B  60I      77.06   -116.35                                   
REMARK 500    HIS B  71      -69.79   -127.64                                   
REMARK 500    THR B 115     -169.17   -125.94                                   
REMARK 500    ASN B 204       69.88     66.57                                   
REMARK 500    ASN B 205      -25.83     74.91                                   
REMARK 500    GLN B 219     -154.26     56.18                                   
REMARK 500    LEU B 242       83.00    -46.12                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN B 311  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B  50   OD2                                                    
REMARK 620 2 HOH B 479   O   127.7                                              
REMARK 620 N                    1                                               
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 310                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 311                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR CHAIN C OF VAL-ASP-ASP-ASP-ASP    
REMARK 800  -LYK PEPTIDE                                                        
DBREF  1EKB A    1    13  UNP    P98072   ENTK_BOVIN     788    800             
DBREF  1EKB B   16   243  UNP    P98072   ENTK_BOVIN     801   1035             
DBREF  1EKB C  303   307  PDB    1EKB     1EKB           303    307             
SEQRES   1 A   13  CYS GLY LYS LYS LEU VAL THR GLN GLU VAL SER PRO LYS          
SEQRES   1 B  235  ILE VAL GLY GLY SER ASP SER ARG GLU GLY ALA TRP PRO          
SEQRES   2 B  235  TRP VAL VAL ALA LEU TYR PHE ASP ASP GLN GLN VAL CYS          
SEQRES   3 B  235  GLY ALA SER LEU VAL SER ARG ASP TRP LEU VAL SER ALA          
SEQRES   4 B  235  ALA HIS CYS VAL TYR GLY ARG ASN MET GLU PRO SER LYS          
SEQRES   5 B  235  TRP LYS ALA VAL LEU GLY LEU HIS MET ALA SER ASN LEU          
SEQRES   6 B  235  THR SER PRO GLN ILE GLU THR ARG LEU ILE ASP GLN ILE          
SEQRES   7 B  235  VAL ILE ASN PRO HIS TYR ASN LYS ARG ARG LYS ASN ASN          
SEQRES   8 B  235  ASP ILE ALA MET MET HIS LEU GLU MET LYS VAL ASN TYR          
SEQRES   9 B  235  THR ASP TYR ILE GLN PRO ILE CYS LEU PRO GLU GLU ASN          
SEQRES  10 B  235  GLN VAL PHE PRO PRO GLY ARG ILE CYS SER ILE ALA GLY          
SEQRES  11 B  235  TRP GLY ALA LEU ILE TYR GLN GLY SER THR ALA ASP VAL          
SEQRES  12 B  235  LEU GLN GLU ALA ASP VAL PRO LEU LEU SER ASN GLU LYS          
SEQRES  13 B  235  CYS GLN GLN GLN MET PRO GLU TYR ASN ILE THR GLU ASN          
SEQRES  14 B  235  MET VAL CYS ALA GLY TYR GLU ALA GLY GLY VAL ASP SER          
SEQRES  15 B  235  CYS GLN GLY ASP SER GLY GLY PRO LEU MET CYS GLN GLU          
SEQRES  16 B  235  ASN ASN ARG TRP LEU LEU ALA GLY VAL THR SER PHE GLY          
SEQRES  17 B  235  TYR GLN CYS ALA LEU PRO ASN ARG PRO GLY VAL TYR ALA          
SEQRES  18 B  235  ARG VAL PRO ARG PHE THR GLU TRP ILE GLN SER PHE LEU          
SEQRES  19 B  235  HIS                                                          
SEQRES   1 C    7  VAL ASP ASP ASP ASP LYK 0QE                                  
HET    LYK  C 306       9                                                       
HET    0QE  C 307       1                                                       
HET     ZN  B 310       1                                                       
HET     ZN  B 311       1                                                       
HETNAM     LYK (2S)-2,6-DIAMINOHEXANE-1,1-DIOL                                  
HETNAM     0QE CHLOROMETHANE                                                    
HETNAM      ZN ZINC ION                                                         
HETSYN     0QE CHLORO METHYL GROUP                                              
FORMUL   3  LYK    C6 H16 N2 O2                                                 
FORMUL   3  0QE    C H3 CL                                                      
FORMUL   4   ZN    2(ZN 2+)                                                     
FORMUL   6  HOH   *108(H2 O)                                                    
HELIX    1   1 ALA B   56  VAL B   59  1                                   4    
HELIX    2   2 PRO B   61  LYS B   63  5                                   3    
HELIX    3   3 ASN B  165  GLN B  171  1                                   7    
HELIX    4   4 VAL B  231  ARG B  233  5                                   3    
HELIX    5   5 THR B  235  GLN B  239  1                                   5    
SHEET    1   A 4 GLU B  81  LEU B  84  0                                        
SHEET    2   A 4 TRP B  64  LEU B  68 -1  N  LEU B  68   O  GLU B  81           
SHEET    3   A 4 VAL B  30  PHE B  35 -1  N  TYR B  34   O  LYS B  65           
SHEET    4   A 4 GLN B  40  SER B  45 -1  N  ALA B  44   O  VAL B  31           
SHEET    1   B 3 TRP B  51  SER B  54  0                                        
SHEET    2   B 3 ALA B 104  LEU B 108 -1  N  MET B 106   O  LEU B  52           
SHEET    3   B 3 ILE B  85  ILE B  90 -1  N  VAL B  89   O  MET B 105           
SHEET    1   C 2 ILE B 135  GLY B 140  0                                        
SHEET    2   C 2 GLN B 156  PRO B 161 -1  N  VAL B 160   O  CYS B 136           
SHEET    1   D 4 MET B 180  ALA B 183  0                                        
SHEET    2   D 4 GLY B 226  ARG B 230 -1  N  TYR B 228   O  VAL B 181           
SHEET    3   D 4 ARG B 206  PHE B 215 -1  N  PHE B 215   O  VAL B 227           
SHEET    4   D 4 PRO B 198  GLU B 203 -1  N  GLU B 203   O  ARG B 206           
SSBOND   1 CYS A    1    CYS B  122                          1555   1555  2.65  
SSBOND   2 CYS B   42    CYS B   58                          1555   1555  2.56  
SSBOND   3 CYS B  136    CYS B  201                          1555   1555  2.52  
SSBOND   4 CYS B  168    CYS B  182                          1555   1555  2.53  
SSBOND   5 CYS B  191    CYS B  220                          1555   1555  2.55  
LINK         NE2 HIS B  57                 C1  0QE C 307     1555   1555  1.47  
LINK         OG  SER B 195                 C   LYK C 306     1555   1555  1.31  
LINK         C   ASP C 305                 N   LYK C 306     1555   1555  1.32  
LINK         C   LYK C 306                 C1  0QE C 307     1555   1555  1.55  
LINK         OD2 ASP B  50                ZN    ZN B 311     1555   1555  2.55  
LINK         OE2 GLU B 126                ZN    ZN B 310     1555   1555  2.44  
LINK        ZN    ZN B 311                 O   HOH B 479     1555   1555  2.66  
SITE     1 AC1  3 GLU B  24  HIS B  71  GLU B 126                               
SITE     1 AC2  4 ASP B  50  GLU B 185  HIS B 243  HOH B 479                    
SITE     1 AC3 17 HIS B  57  LYS B  99  TYR B 174  ASP B 189                    
SITE     2 AC3 17 SER B 190  GLN B 192  GLY B 193  SER B 195                    
SITE     3 AC3 17 SER B 214  PHE B 215  GLY B 216  GLY B 226                    
SITE     4 AC3 17 HOH B 407  HOH B 438  HOH C 436  HOH C 445                    
SITE     5 AC3 17 HOH C 521                                                     
CRYST1   39.990   70.650   85.220  90.00  90.00  90.00 P 21 21 21    4          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.025006  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.014154  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.011734        0.00000