HEADER    TRANSFERASE                             22-OCT-01   1K7Y               
TITLE     E. COLI METH C-TERMINAL FRAGMENT (649-1227)                            
COMPND    MOL_ID: 1;                                                             
COMPND   2 MOLECULE: METHIONINE SYNTHASE;                                        
COMPND   3 CHAIN: A;                                                             
COMPND   4 FRAGMENT: C-TERMINAL ACTIVATION COMPLEX, RESIDUES 651-1227;           
COMPND   5 EC: 2.1.1.13;                                                         
COMPND   6 ENGINEERED: YES;                                                      
COMPND   7 MUTATION: YES                                                         
SOURCE    MOL_ID: 1;                                                             
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                                
SOURCE   3 ORGANISM_TAXID: 562;                                                  
SOURCE   4 GENE: ESCHERICHIA COLI;                                               
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                  
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                         
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: XL1-BLUE;                                   
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                               
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PTRC99A                                    
KEYWDS    MOTION OF 4-HELIX BUNDLE, DOMAIN INTERACTIONS, TRANSFERASE             
EXPDTA    X-RAY DIFFRACTION                                                      
AUTHOR    V.BANDARIAN,K.A.PATTRIDGE,B.W.LENNON,D.P.HUDDLER,R.G.MATTHEWS,         
AUTHOR   2 M.L.LUDWIG                                                            
REVDAT   7   16-AUG-23 1K7Y    1       REMARK                                    
REVDAT   6   27-OCT-21 1K7Y    1       REMARK SEQADV                             
REVDAT   5   14-FEB-18 1K7Y    1       REMARK                                    
REVDAT   4   24-OCT-12 1K7Y    1       FORMUL VERSN                              
REVDAT   3   24-FEB-09 1K7Y    1       VERSN                                     
REVDAT   2   01-APR-03 1K7Y    1       JRNL                                      
REVDAT   1   21-DEC-01 1K7Y    0                                                 
JRNL        AUTH   V.BANDARIAN,K.A.PATTRIDGE,B.W.LENNON,D.P.HUDDLER,             
JRNL        AUTH 2 R.G.MATTHEWS,M.L.LUDWIG                                       
JRNL        TITL   DOMAIN ALTERNATION SWITCHES B(12)-DEPENDENT METHIONINE        
JRNL        TITL 2 SYNTHASE TO THE ACTIVATION CONFORMATION.                      
JRNL        REF    NAT.STRUCT.BIOL.              V.   9    53 2002               
JRNL        REFN                   ISSN 1072-8368                                
JRNL        PMID   11731805                                                      
JRNL        DOI    10.1038/NSB738                                                
REMARK   2                                                                       
REMARK   2 RESOLUTION.    3.00 ANGSTROMS.                                        
REMARK   3                                                                       
REMARK   3 REFINEMENT.                                                           
REMARK   3   PROGRAM     : CNS                                                   
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-               
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,               
REMARK   3               : READ,RICE,SIMONSON,WARREN                             
REMARK   3                                                                       
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                     
REMARK   3                                                                       
REMARK   3  DATA USED IN REFINEMENT.                                             
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 3.00                            
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 15.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                           
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                            
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                            
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 98.0                            
REMARK   3   NUMBER OF REFLECTIONS             : 18245                           
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) : 0.218                            
REMARK   3   FREE R VALUE                     : 0.276                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                             
REMARK   3   FREE R VALUE TEST SET COUNT      : 1794                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                             
REMARK   3                                                                       
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                   
REMARK   3   TOTAL NUMBER OF BINS USED           : NULL                          
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : NULL                          
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                          
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                          
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                          
REMARK   3   BIN FREE R VALUE                    : NULL                          
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                          
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                          
REMARK   3                                                                       
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                     
REMARK   3   PROTEIN ATOMS            : 4566                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                        
REMARK   3   HETEROGEN ATOMS          : 141                                      
REMARK   3   SOLVENT ATOMS            : 42                                       
REMARK   3                                                                       
REMARK   3  B VALUES.                                                            
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                            
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : NULL                            
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) : NULL                             
REMARK   3   ESD FROM SIGMAA              (A) : NULL                             
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                             
REMARK   3                                                                       
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                          
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                             
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                             
REMARK   3                                                                       
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                    
REMARK   3   BOND LENGTHS                 (A) : 0.013                            
REMARK   3   BOND ANGLES            (DEGREES) : 1.500                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                             
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                             
REMARK   3                                                                       
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                       
REMARK   3                                                                       
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                 
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                  
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                  
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                  
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                  
REMARK   3                                                                       
REMARK   3  BULK SOLVENT MODELING.                                               
REMARK   3   METHOD USED : NULL                                                  
REMARK   3   KSOL        : NULL                                                  
REMARK   3   BSOL        : NULL                                                  
REMARK   3                                                                       
REMARK   3  NCS MODEL : NULL                                                     
REMARK   3                                                                       
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT           
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                  
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                  
REMARK   3                                                                       
REMARK   3  PARAMETER FILE  1  : NULL                                            
REMARK   3  TOPOLOGY FILE  1   : NULL                                            
REMARK   3                                                                       
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                       
REMARK   4                                                                       
REMARK   4 1K7Y COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                          
REMARK 100                                                                       
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 25-OCT-01.                   
REMARK 100 THE DEPOSITION ID IS D_1000014673.                                    
REMARK 200                                                                       
REMARK 200 EXPERIMENTAL DETAILS                                                  
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                   
REMARK 200  DATE OF DATA COLLECTION        : 17-JAN-00                           
REMARK 200  TEMPERATURE           (KELVIN) : 140                                 
REMARK 200  PH                             : 6.5                                 
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                              
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                   
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.54                                
REMARK 200  MONOCHROMATOR                  : YALE MIRRORS                        
REMARK 200  OPTICS                         : YALE MIRRORS                        
REMARK 200                                                                       
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                         
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IV                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                               
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                           
REMARK 200                                                                       
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 18414                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 3.000                               
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                              
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                               
REMARK 200                                                                       
REMARK 200 OVERALL.                                                              
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.4                                
REMARK 200  DATA REDUNDANCY                : NULL                                
REMARK 200  R MERGE                    (I) : NULL                                
REMARK 200  R SYM                      (I) : 0.08000                             
REMARK 200   FOR THE DATA SET  : 16.1000                             
REMARK 200                                                                       
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 3.00                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.11                      
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.4                                
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                                
REMARK 200  R MERGE FOR SHELL          (I) : NULL                                
REMARK 200  R SYM FOR SHELL            (I) : 0.39600                             
REMARK 200   FOR SHELL         : 3.300                               
REMARK 200                                                                       
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                               
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT         
REMARK 200 SOFTWARE USED: CNS                                                    
REMARK 200 STARTING MODEL: PDB ENTRIES 1MSK AND 1BMT                             
REMARK 200                                                                       
REMARK 200 REMARK: NULL                                                          
REMARK 280                                                                       
REMARK 280 CRYSTAL                                                               
REMARK 280 SOLVENT CONTENT, VS   (%): 64.31                                      
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.45                      
REMARK 280                                                                       
REMARK 280 CRYSTALLIZATION CONDITIONS: CACODYLATE, AMMONIUM SULFATE, PEG         
REMARK 280  8000, PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 295K        
REMARK 290                                                                       
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                             
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 43 21 2                         
REMARK 290                                                                       
REMARK 290      SYMOP   SYMMETRY                                                 
REMARK 290     NNNMMM   OPERATOR                                                 
REMARK 290       1555   X,Y,Z                                                    
REMARK 290       2555   -X,-Y,Z+1/2                                              
REMARK 290       3555   -Y+1/2,X+1/2,Z+3/4                                       
REMARK 290       4555   Y+1/2,-X+1/2,Z+1/4                                       
REMARK 290       5555   -X+1/2,Y+1/2,-Z+3/4                                      
REMARK 290       6555   X+1/2,-Y+1/2,-Z+1/4                                      
REMARK 290       7555   Y,X,-Z                                                   
REMARK 290       8555   -Y,-X,-Z+1/2                                             
REMARK 290                                                                       
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                      
REMARK 290           MMM -> TRANSLATION VECTOR                                   
REMARK 290                                                                       
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                             
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM              
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                 
REMARK 290 RELATED MOLECULES.                                                    
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000             
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000             
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000             
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000             
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000             
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       74.29650             
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000       54.86100             
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       54.86100             
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000      111.44475             
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       54.86100             
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       54.86100             
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       37.14825             
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       54.86100             
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       54.86100             
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000      111.44475             
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       54.86100             
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       54.86100             
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000       37.14825             
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       74.29650             
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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                   
REMARK 350 SOFTWARE USED: PISA                                                   
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 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 A1143   C   -  N   -  CA  ANGL. DEV. =  11.2 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    ALA A 652      -81.89    176.52                                    
REMARK 500    GLU A 653      -75.30     82.74                                    
REMARK 500    ARG A 655       28.06    -71.60                                    
REMARK 500    SER A 656       14.40   -141.55                                    
REMARK 500    GLU A 673       -2.88   -148.32                                    
REMARK 500    LYS A 740     -115.26    -69.09                                    
REMARK 500    GLN A 742       39.82    -96.57                                    
REMARK 500    VAL A 754      170.35    -46.75                                    
REMARK 500    ASP A 760      -21.33   -152.70                                    
REMARK 500    ALA A 835      -72.13    -45.85                                    
REMARK 500    ILE A 846      -64.40   -130.97                                    
REMARK 500    GLN A 848        4.54    -59.94                                    
REMARK 500    THR A 874      -67.28   -130.24                                    
REMARK 500    PRO A 899       69.34    -58.53                                    
REMARK 500    ASN A 912       43.63    -91.62                                    
REMARK 500    PRO A 923      150.43    -47.00                                    
REMARK 500    GLU A 967      -75.68    -66.20                                    
REMARK 500    TYR A1041      142.06    -33.35                                    
REMARK 500    VAL A1110      -79.82    -94.00                                    
REMARK 500    ASN A1117       46.82    -84.66                                    
REMARK 500    CYS A1142       78.69   -161.40                                    
REMARK 500    GLU A1144      107.73    -54.67                                    
REMARK 500    THR A1146       -9.30    -51.89                                    
REMARK 500    HIS A1184      119.36    -35.92                                    
REMARK 500    ALA A1193     -153.31     71.88                                    
REMARK 500    ALA A1226      108.03    -49.59                                    
REMARK 500                                                                       
REMARK 500 REMARK: NULL                                                          
REMARK 800                                                                       
REMARK 800 SITE                                                                  
REMARK 800 SITE_IDENTIFIER: AC1                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 254                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC2                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 255                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC3                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 267                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC4                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 323                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC5                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 251                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC6                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 259                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC7                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 260                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC8                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 270                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: AC9                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 282                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: BC1                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 309                  
REMARK 800                                                                       
REMARK 800 SITE_IDENTIFIER: BC2                                                  
REMARK 800 EVIDENCE_CODE: SOFTWARE                                               
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE B12 A 1248                 
REMARK 900                                                                       
REMARK 900 RELATED ENTRIES                                                       
REMARK 900 RELATED ID: 1MSK   RELATED DB: PDB                                    
REMARK 900 ENTRY FOR THE ACTIVATION DOMAIN (900-1227)                            
REMARK 900 RELATED ID: 1BMT   RELATED DB: PDB                                    
REMARK 900 ENTRY FOR THE B12-BINDING FRAGMENT (651-896)                          
DBREF  1K7Y A  651  1227  UNP    P13009   METH_ECOLI     651   1227              
SEQADV 1K7Y GLY A  759  UNP  P13009    HIS   759 ENGINEERED MUTATION             
SEQRES   1 A  577  GLN ALA GLU TRP ARG SER TRP GLU VAL ASN LYS ARG LEU           
SEQRES   2 A  577  GLU TYR SER LEU VAL LYS GLY ILE THR GLU PHE ILE GLU           
SEQRES   3 A  577  GLN ASP THR GLU GLU ALA ARG GLN GLN ALA THR ARG PRO           
SEQRES   4 A  577  ILE GLU VAL ILE GLU GLY PRO LEU MET ASP GLY MET ASN           
SEQRES   5 A  577  VAL VAL GLY ASP LEU PHE GLY GLU GLY LYS MET PHE LEU           
SEQRES   6 A  577  PRO GLN VAL VAL LYS SER ALA ARG VAL MET LYS GLN ALA           
SEQRES   7 A  577  VAL ALA TYR LEU GLU PRO PHE ILE GLU ALA SER LYS GLU           
SEQRES   8 A  577  GLN GLY LYS THR ASN GLY LYS MET VAL ILE ALA THR VAL           
SEQRES   9 A  577  LYS GLY ASP VAL GLY ASP ILE GLY LYS ASN ILE VAL GLY           
SEQRES  10 A  577  VAL VAL LEU GLN CYS ASN ASN TYR GLU ILE VAL ASP LEU           
SEQRES  11 A  577  GLY VAL MET VAL PRO ALA GLU LYS ILE LEU ARG THR ALA           
SEQRES  12 A  577  LYS GLU VAL ASN ALA ASP LEU ILE GLY LEU SER GLY LEU           
SEQRES  13 A  577  ILE THR PRO SER LEU ASP GLU MET VAL ASN VAL ALA LYS           
SEQRES  14 A  577  GLU MET GLU ARG GLN GLY PHE THR ILE PRO LEU LEU ILE           
SEQRES  15 A  577  GLY GLY ALA THR THR SER LYS ALA HIS THR ALA VAL LYS           
SEQRES  16 A  577  ILE GLU GLN ASN TYR SER GLY PRO THR VAL TYR VAL GLN           
SEQRES  17 A  577  ASN ALA SER ARG THR VAL GLY VAL VAL ALA ALA LEU LEU           
SEQRES  18 A  577  SER ASP THR GLN ARG ASP ASP PHE VAL ALA ARG THR ARG           
SEQRES  19 A  577  LYS GLU TYR GLU THR VAL ARG ILE GLN HIS GLY ARG LYS           
SEQRES  20 A  577  LYS PRO ARG THR PRO PRO VAL THR LEU GLU ALA ALA ARG           
SEQRES  21 A  577  ASP ASN ASP PHE ALA PHE ASP TRP GLN ALA TYR THR PRO           
SEQRES  22 A  577  PRO VAL ALA HIS ARG LEU GLY VAL GLN GLU VAL GLU ALA           
SEQRES  23 A  577  SER ILE GLU THR LEU ARG ASN TYR ILE ASP TRP THR PRO           
SEQRES  24 A  577  PHE PHE MET THR TRP SER LEU ALA GLY LYS TYR PRO ARG           
SEQRES  25 A  577  ILE LEU GLU ASP GLU VAL VAL GLY VAL GLU ALA GLN ARG           
SEQRES  26 A  577  LEU PHE LYS ASP ALA ASN ASP MET LEU ASP LYS LEU SER           
SEQRES  27 A  577  ALA GLU LYS THR LEU ASN PRO ARG GLY VAL VAL GLY LEU           
SEQRES  28 A  577  PHE PRO ALA ASN ARG VAL GLY ASP ASP ILE GLU ILE TYR           
SEQRES  29 A  577  ARG ASP GLU THR ARG THR HIS VAL ILE ASN VAL SER HIS           
SEQRES  30 A  577  HIS LEU ARG GLN GLN THR GLU LYS THR GLY PHE ALA ASN           
SEQRES  31 A  577  TYR CYS LEU ALA ASP PHE VAL ALA PRO LYS LEU SER GLY           
SEQRES  32 A  577  LYS ALA ASP TYR ILE GLY ALA PHE ALA VAL THR GLY GLY           
SEQRES  33 A  577  LEU GLU GLU ASP ALA LEU ALA ASP ALA PHE GLU ALA GLN           
SEQRES  34 A  577  HIS ASP ASP TYR ASN LYS ILE MET VAL LYS ALA LEU ALA           
SEQRES  35 A  577  ASP ARG LEU ALA GLU ALA PHE ALA GLU TYR LEU HIS GLU           
SEQRES  36 A  577  ARG VAL ARG LYS VAL TYR TRP GLY TYR ALA PRO ASN GLU           
SEQRES  37 A  577  ASN LEU SER ASN GLU GLU LEU ILE ARG GLU ASN TYR GLN           
SEQRES  38 A  577  GLY ILE ARG PRO ALA PRO GLY TYR PRO ALA CYS PRO GLU           
SEQRES  39 A  577  HIS THR GLU LYS ALA THR ILE TRP GLU LEU LEU GLU VAL           
SEQRES  40 A  577  GLU LYS HIS THR GLY MET LYS LEU THR GLU SER PHE ALA           
SEQRES  41 A  577  MET TRP PRO GLY ALA SER VAL SER GLY TRP TYR PHE SER           
SEQRES  42 A  577  HIS PRO ASP SER LYS TYR TYR ALA VAL ALA GLN ILE GLN           
SEQRES  43 A  577  ARG ASP GLN VAL GLU ASP TYR ALA ARG ARG LYS GLY MET           
SEQRES  44 A  577  SER VAL THR GLU VAL GLU ARG TRP LEU ALA PRO ASN LEU           
SEQRES  45 A  577  GLY TYR ASP ALA ASP                                           
HET    SO4  A 254       5                                                        
HET    SO4  A 255       5                                                        
HET    SO4  A 267       5                                                        
HET    SO4  A 323       5                                                        
HET    SO4  A 251       5                                                        
HET    SO4  A 259       5                                                        
HET    SO4  A 260       5                                                        
HET    SO4  A 270       5                                                        
HET    SO4  A 282       5                                                        
HET    SO4  A 309       5                                                        
HET    B12  A1248      91                                                        
HETNAM     SO4 SULFATE ION                                                       
HETNAM     B12 COBALAMIN                                                         
FORMUL   2  SO4    10(O4 S 2-)                                                   
FORMUL  12  B12    C62 H89 CO N13 O14 P 2+                                       
FORMUL  13  HOH   *42(H2 O)                                                      
HELIX    1   1 GLU A  653  TRP A  657  5                                   5     
HELIX    2   2 GLU A  658  GLY A  670  1                                  13     
HELIX    3   3 PHE A  674  GLN A  685  1                                  12     
HELIX    4   4 ILE A  690  GLY A  695  1                                   6     
HELIX    5   5 GLY A  695  GLU A  710  1                                  16     
HELIX    6   6 PHE A  714  ALA A  738  1                                  25     
HELIX    7   7 ASP A  760  CYS A  772  1                                  13     
HELIX    8   8 PRO A  785  ASN A  797  1                                  13     
HELIX    9   9 ILE A  807  GLN A  824  1                                  18     
HELIX   10  10 ALA A  840  LYS A  845  1                                   6     
HELIX   11  11 ILE A  846  TYR A  850  5                                   5     
HELIX   12  12 ASN A  859  LEU A  871  1                                  13     
HELIX   13  13 THR A  874  HIS A  894  1                                  21     
HELIX   14  14 THR A  905  ASN A  912  1                                   8     
HELIX   15  15 SER A  937  ARG A  942  1                                   6     
HELIX   16  16 ASN A  943  ILE A  945  5                                   3     
HELIX   17  17 ASP A  946  TRP A  954  1                                   9     
HELIX   18  18 PRO A  961  ASP A  966  5                                   6     
HELIX   19  19 VAL A  969  LYS A  991  1                                  23     
HELIX   20  20 CYS A 1042  VAL A 1047  5                                   6     
HELIX   21  21 PRO A 1049  GLY A 1053  5                                   5     
HELIX   22  22 GLU A 1068  GLN A 1079  1                                  12     
HELIX   23  23 ASP A 1081  VAL A 1110  1                                  30     
HELIX   24  24 SER A 1121  ARG A 1127  1                                   7     
HELIX   25  25 GLU A 1144  THR A 1146  5                                   3     
HELIX   26  26 GLU A 1147  GLU A 1156  1                                  10     
HELIX   27  27 GLU A 1156  THR A 1161  1                                   6     
HELIX   28  28 GLN A 1196  GLY A 1208  1                                  13     
HELIX   29  29 SER A 1210  LEU A 1218  1                                   9     
HELIX   30  30 ALA A 1219  LEU A 1222  5                                   4     
SHEET    1   A 5 GLU A 776  ASP A 779  0                                         
SHEET    2   A 5 LYS A 748  THR A 753  1  N  MET A 749   O  GLU A 776            
SHEET    3   A 5 LEU A 800  SER A 804  1  O  GLY A 802   N  VAL A 750            
SHEET    4   A 5 LEU A 830  GLY A 833  1  O  LEU A 831   N  ILE A 801            
SHEET    5   A 5 THR A 854  TYR A 856  1  O  VAL A 855   N  ILE A 832            
SHEET    1   B 4 SER A1176  TYR A1181  0                                         
SHEET    2   B 4 ASP A1056  THR A1064 -1  N  VAL A1063   O  VAL A1177            
SHEET    3   B 4 ARG A 996  VAL A1007 -1  N  PHE A1002   O  ILE A1058            
SHEET    4   B 4 GLY A 930  VAL A 934 -1  N  GLN A 932   O  VAL A 999            
SHEET    1   C 5 SER A1176  TYR A1181  0                                         
SHEET    2   C 5 ASP A1056  THR A1064 -1  N  VAL A1063   O  VAL A1177            
SHEET    3   C 5 ARG A 996  VAL A1007 -1  N  PHE A1002   O  ILE A1058            
SHEET    4   C 5 ASP A1010  TYR A1014 -1  O  GLU A1012   N  ASN A1005            
SHEET    5   C 5 VAL A1022  HIS A1027 -1  O  SER A1026   N  ILE A1011            
SHEET    1   D 2 LYS A1164  LEU A1165  0                                         
SHEET    2   D 2 MET A1171  TRP A1172 -1  O  TRP A1172   N  LYS A1164            
CISPEP   1 TYR A  960    PRO A  961          0        -0.68                      
CISPEP   2 TRP A 1172    PRO A 1173          0        -0.32                      
SITE     1 AC1  3 LYS A 712  HIS A 927  ARG A 928                                
SITE     1 AC2  6 SO4 A 282  LYS A 755  PRO A 785  ALA A 786                     
SITE     2 AC2  6 GLU A 787  ASN A 816                                           
SITE     1 AC3  4 ARG A 928  GLN A 932  ARG A1106  TYR A1111                     
SITE     1 AC4  2 TYR A1139  B12 A1248                                           
SITE     1 AC5  3 LYS A 720  ARG A 723  TYR A1083                                
SITE     1 AC6  2 LYS A 819  LYS A1188                                           
SITE     1 AC7  3 ARG A 823  PRO A1140  B12 A1248                                
SITE     1 AC8  2 ARG A 996  HIS A1160                                           
SITE     1 AC9  2 SO4 A 255  ARG A1127                                           
SITE     1 BC1  1 VAL A 971                                                      
SITE     1 BC2 38 SO4 A 260  HOH A 271  HOH A 279  SO4 A 323                     
SITE     2 BC2 38 VAL A 758  GLY A 762  ILE A 765  VAL A 766                     
SITE     3 BC2 38 GLY A 802  LEU A 803  SER A 804  LEU A 806                     
SITE     4 BC2 38 ILE A 807  THR A 808  LEU A 831  GLY A 833                     
SITE     5 BC2 38 GLY A 834  ALA A 835  THR A 836  VAL A 857                     
SITE     6 BC2 38 GLN A 858  ASN A 859  ALA A 860  THR A 863                     
SITE     7 BC2 38 ASP A1093  ALA A1136  PRO A1137  GLY A1138                     
SITE     8 BC2 38 TYR A1139  PRO A1140  HIS A1145  ALA A1170                     
SITE     9 BC2 38 MET A1171  GLY A1174  ALA A1175  SER A1176                     
SITE    10 BC2 38 VAL A1177  SER A1178                                           
CRYST1  109.722  109.722  148.593  90.00  90.00  90.00 P 43 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      0.009114  0.000000  0.000000        0.00000                          
SCALE2      0.000000  0.009114  0.000000        0.00000                          
SCALE3      0.000000  0.000000  0.006730        0.00000                          
END