HEADER    HYDROLASE                               10-SEP-04   1XEM              
TITLE     HIGH RESOLUTION CRYSTAL STRUCTURE OF ESCHERICHIA COLI ZINC- PEPTIDE   
TITLE    2 DEFORMYLASE BOUND TO FORMATE                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: PEPTIDE DEFORMYLASE;                                       
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: PDF, POLYPEPTIDE DEFORMYLASE;                               
COMPND   5 EC: 3.5.1.88                                                         
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 469008;                                              
SOURCE   4 STRAIN: BL21(DE3)                                                    
KEYWDS    ZINC DEFORMYLASE, FORMATE, HYDROLASE                                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.JAIN,B.HAO,R.-P.LIU,M.K.CHAN                                        
REVDAT   5   14-FEB-24 1XEM    1       REMARK LINK                              
REVDAT   4   13-JUL-11 1XEM    1       VERSN                                    
REVDAT   3   24-FEB-09 1XEM    1       VERSN                                    
REVDAT   2   19-APR-05 1XEM    1       JRNL                                     
REVDAT   1   29-MAR-05 1XEM    0                                                
JRNL        AUTH   R.JAIN,B.HAO,R.-P.LIU,M.K.CHAN                               
JRNL        TITL   STRUCTURES OF E. COLI PEPTIDE DEFORMYLASE BOUND TO FORMATE:  
JRNL        TITL 2 INSIGHT INTO THE PREFERENCE FOR FE2+ OVER ZN2+ AS THE ACTIVE 
JRNL        TITL 3 SITE METAL                                                   
JRNL        REF    J.AM.CHEM.SOC.                V. 127  4558 2005              
JRNL        REFN                   ISSN 0002-7863                               
JRNL        PMID   15796505                                                     
JRNL        DOI    10.1021/JA0503074                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.76 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.1                                              
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) : 1.76                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 14.88                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 208846.520                     
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 98.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 20352                          
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                     : 0.204                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.800                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2004                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.005                           
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) : 1.76                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.87                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 96.50                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 2875                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1880                       
REMARK   3   BIN FREE R VALUE                    : 0.2370                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 10.00                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 321                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.013                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1315                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 31                                      
REMARK   3   SOLVENT ATOMS            : 304                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 16.50                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 23.60                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.04000                                              
REMARK   3    B22 (A**2) : 0.04000                                              
REMARK   3    B33 (A**2) : -0.07000                                             
REMARK   3    B12 (A**2) : 0.95000                                              
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) : 0.16                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.07                            
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) : 0.20                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.11                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.022                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.900                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.00                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.240                           
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) : 1.630 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.240 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 3.210 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 4.740 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.37                                                 
REMARK   3   BSOL        : 49.70                                                
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  : CMB.PAR                                        
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : WATER_REP.TOP                                  
REMARK   3  TOPOLOGY FILE  3   : CMB.TOP                                        
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1XEM COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 23-SEP-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000030272.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 29-MAY-04                          
REMARK 200  TEMPERATURE           (KELVIN) : 93                                 
REMARK 200  PH                             : 4.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 22-ID                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9997                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 20675                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.760                              
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     (%) : 99.4                               
REMARK 200  DATA REDUNDANCY                : 17.50                              
REMARK 200  R MERGE                    (I) : 0.09500                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 29.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.76                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.82                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 13.60                              
REMARK 200  R MERGE FOR SHELL          (I) : 0.26000                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 13.08                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: CNS 1.1                                               
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 50.32                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.57                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: SODIUM ACETATE, SODIUM FORMATE, PH       
REMARK 280  4.6, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 61 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+1/3                                            
REMARK 290       3555   -X+Y,-X,Z+2/3                                           
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+5/6                                            
REMARK 290       6555   X-Y,X,Z+1/6                                             
REMARK 290       7555   Y,X,-Z+1/3                                              
REMARK 290       8555   X-Y,-Y,-Z                                               
REMARK 290       9555   -X,-X+Y,-Z+2/3                                          
REMARK 290      10555   -Y,-X,-Z+5/6                                            
REMARK 290      11555   -X+Y,Y,-Z+1/2                                           
REMARK 290      12555   X,X-Y,-Z+1/6                                            
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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       74.66667            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000      149.33333            
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      112.00000            
REMARK 290   SMTRY1   5  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   5 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000      186.66667            
REMARK 290   SMTRY1   6  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       37.33333            
REMARK 290   SMTRY1   7 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       74.66667            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   9  0.000000  0.000000 -1.000000      149.33333            
REMARK 290   SMTRY1  10  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  10 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000      186.66667            
REMARK 290   SMTRY1  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  11  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000      112.00000            
REMARK 290   SMTRY1  12  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  12  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000       37.33333            
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: MONOMERIC                         
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 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 770  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     LYS A   165                                                      
REMARK 465     ALA A   166                                                      
REMARK 465     ARG A   167                                                      
REMARK 465     ALA A   168                                                      
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    ASP A  10      115.81   -161.67                                   
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 A 401  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 CYS A  90   SG                                                     
REMARK 620 2 HIS A 132   NE2 117.7                                              
REMARK 620 3 HIS A 136   NE2 103.1 105.4                                        
REMARK 620 4 FMT A 501   O1  137.4  92.2  96.5                                  
REMARK 620 N                    1     2     3                                   
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 401                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 501                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 502                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 503                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 504                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 505                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 506                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 507                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 508                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 509                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMT A 510                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1BSK   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1DFF   RELATED DB: PDB                                   
DBREF  1XEM A    1   168  UNP    P0A6K3   DEF_ECOLI        1    168             
SEQRES   1 A  168  SER VAL LEU GLN VAL LEU HIS ILE PRO ASP GLU ARG LEU          
SEQRES   2 A  168  ARG LYS VAL ALA LYS PRO VAL GLU GLU VAL ASN ALA GLU          
SEQRES   3 A  168  ILE GLN ARG ILE VAL ASP ASP MET PHE GLU THR MET TYR          
SEQRES   4 A  168  ALA GLU GLU GLY ILE GLY LEU ALA ALA THR GLN VAL ASP          
SEQRES   5 A  168  ILE HIS GLN ARG ILE ILE VAL ILE ASP VAL SER GLU ASN          
SEQRES   6 A  168  ARG ASP GLU ARG LEU VAL LEU ILE ASN PRO GLU LEU LEU          
SEQRES   7 A  168  GLU LYS SER GLY GLU THR GLY ILE GLU GLU GLY CYS LEU          
SEQRES   8 A  168  SER ILE PRO GLU GLN ARG ALA LEU VAL PRO ARG ALA GLU          
SEQRES   9 A  168  LYS VAL LYS ILE ARG ALA LEU ASP ARG ASP GLY LYS PRO          
SEQRES  10 A  168  PHE GLU LEU GLU ALA ASP GLY LEU LEU ALA ILE CYS ILE          
SEQRES  11 A  168  GLN HIS GLU MET ASP HIS LEU VAL GLY LYS LEU PHE MET          
SEQRES  12 A  168  ASP TYR LEU SER PRO LEU LYS GLN GLN ARG ILE ARG GLN          
SEQRES  13 A  168  LYS VAL GLU LYS LEU ASP ARG LEU LYS ALA ARG ALA              
HET     ZN  A 401       1                                                       
HET    FMT  A 501       3                                                       
HET    FMT  A 502       3                                                       
HET    FMT  A 503       3                                                       
HET    FMT  A 504       3                                                       
HET    FMT  A 505       3                                                       
HET    FMT  A 506       3                                                       
HET    FMT  A 507       3                                                       
HET    FMT  A 508       3                                                       
HET    FMT  A 509       3                                                       
HET    FMT  A 510       3                                                       
HETNAM      ZN ZINC ION                                                         
HETNAM     FMT FORMIC ACID                                                      
FORMUL   2   ZN    ZN 2+                                                        
FORMUL   3  FMT    10(C H2 O2)                                                  
FORMUL  13  HOH   *304(H2 O)                                                    
HELIX    1   1 ASP A   10  LYS A   15  5                                   6    
HELIX    2   2 ASN A   24  GLU A   41  1                                  18    
HELIX    3   3 THR A   49  ASP A   52  5                                   4    
HELIX    4   4 ASP A  123  VAL A  138  1                                  16    
HELIX    5   5 LEU A  141  LEU A  146  5                                   6    
HELIX    6   6 SER A  147  LEU A  164  1                                  18    
SHEET    1   A 5 GLY A  45  ALA A  47  0                                        
SHEET    2   A 5 ILE A  57  ILE A  60 -1  O  VAL A  59   N  LEU A  46           
SHEET    3   A 5 LEU A  70  SER A  81 -1  O  LEU A  72   N  ILE A  58           
SHEET    4   A 5 LYS A 105  LEU A 111 -1  O  LYS A 107   N  LEU A  78           
SHEET    5   A 5 PRO A 117  ALA A 122 -1  O  ALA A 122   N  VAL A 106           
SHEET    1   B 2 GLU A  87  GLU A  88  0                                        
SHEET    2   B 2 ALA A  98  LEU A  99 -1  O  ALA A  98   N  GLU A  88           
LINK         SG  CYS A  90                ZN    ZN A 401     1555   1555  2.25  
LINK         NE2 HIS A 132                ZN    ZN A 401     1555   1555  2.08  
LINK         NE2 HIS A 136                ZN    ZN A 401     1555   1555  1.99  
LINK        ZN    ZN A 401                 O1  FMT A 501     1555   1555  2.09  
CISPEP   1 ILE A    8    PRO A    9          0         9.71                     
SITE     1 AC1  5 GLN A  50  CYS A  90  HIS A 132  HIS A 136                    
SITE     2 AC1  5 FMT A 501                                                     
SITE     1 AC2  8 GLY A  45  GLN A  50  CYS A  90  LEU A  91                    
SITE     2 AC2  8 HIS A 132  GLU A 133  HIS A 136   ZN A 401                    
SITE     1 AC3  9 ARG A  69  VAL A  71  ARG A 113  FMT A 505                    
SITE     2 AC3  9 HOH A 519  HOH A 562  HOH A 572  HOH A 630                    
SITE     3 AC3  9 HOH A 644                                                     
SITE     1 AC4  7 GLN A 131  MET A 134  FMT A 509  HOH A 546                    
SITE     2 AC4  7 HOH A 590  HOH A 596  HOH A 736                               
SITE     1 AC5  7 ILE A   8  PRO A   9  ASP A  10  ARG A  14                    
SITE     2 AC5  7 HOH A 671  HOH A 674  HOH A 718                               
SITE     1 AC6  6 ASP A 112  ASP A 114  FMT A 502  HOH A 562                    
SITE     2 AC6  6 HOH A 630  HOH A 683                                          
SITE     1 AC7  5 LYS A  80  SER A  81  HOH A 580  HOH A 637                    
SITE     2 AC7  5 HOH A 707                                                     
SITE     1 AC8  9 LYS A  80  GLU A  83  FMT A 509  HOH A 574                    
SITE     2 AC8  9 HOH A 594  HOH A 596  HOH A 669  HOH A 726                    
SITE     3 AC8  9 HOH A 736                                                     
SITE     1 AC9  5 HIS A   7  GLU A  41  HOH A 575  HOH A 748                    
SITE     2 AC9  5 HOH A 786                                                     
SITE     1 BC1  8 GLN A 131  ASP A 135  TYR A 145  FMT A 503                    
SITE     2 BC1  8 FMT A 507  HOH A 521  HOH A 574  HOH A 669                    
SITE     1 BC2  7 GLU A  95  GLN A  96  LYS A 157  HOH A 545                    
SITE     2 BC2  7 HOH A 577  HOH A 716  HOH A 734                               
CRYST1   54.640   54.640  224.000  90.00  90.00 120.00 P 61 2 2     12          
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      0.018302  0.010566  0.000000        0.00000                         
SCALE2      0.000000  0.021133  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.004464        0.00000