HEADER    TRANSFERASE                             03-JAN-08   3BUL               
TITLE     E. COLI I690C/G743C 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 649-1227);          
COMPND   5 SYNONYM: 5-METHYLTETRAHYDROFOLATE-HOMOCYSTEINE METHYLTRANSFERASE,     
COMPND   6 METHIONINE SYNTHASE, VITAMIN-B12- DEPENDENT, MS;                      
COMPND   7 EC: 2.1.1.13;                                                         
COMPND   8 ENGINEERED: YES;                                                      
COMPND   9 MUTATION: YES                                                         
SOURCE    MOL_ID: 1;                                                             
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                                
SOURCE   3 ORGANISM_TAXID: 562;                                                  
SOURCE   4 GENE: METH;                                                           
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                  
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                         
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: HMS174(DE3);                                
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                               
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PVB8                                       
KEYWDS    METH, TRANSFERASE, REACTIVATION CONFORMATION, H759, COBALAMIN,         
KEYWDS   2 INTERMODULAR INTERACTIONS, AMINO-ACID BIOSYNTHESIS, COBALT, METAL-    
KEYWDS   3 BINDING, METHIONINE BIOSYNTHESIS, METHYLTRANSFERASE, S-ADENOSYL-L-    
KEYWDS   4 METHIONINE                                                            
EXPDTA    X-RAY DIFFRACTION                                                      
AUTHOR    M.KOUTMOS,K.A.PATTRIDGE,M.L.LUDWIG                                     
REVDAT   5   30-AUG-23 3BUL    1       REMARK                                    
REVDAT   4   20-OCT-21 3BUL    1       REMARK SEQADV                             
REVDAT   3   24-OCT-12 3BUL    1       FORMUL VERSN                              
REVDAT   2   24-FEB-09 3BUL    1       VERSN                                     
REVDAT   1   01-APR-08 3BUL    0                                                 
JRNL        AUTH   S.DATTA,M.KOUTMOS,K.A.PATTRIDGE,M.L.LUDWIG,R.G.MATTHEWS       
JRNL        TITL   A DISULFIDE-STABILIZED CONFORMER OF METHIONINE SYNTHASE       
JRNL        TITL 2 REVEALS AN UNEXPECTED ROLE FOR THE HISTIDINE LIGAND OF THE    
JRNL        TITL 3 COBALAMIN COFACTOR.                                           
JRNL        REF    PROC.NATL.ACAD.SCI.USA        V. 105  4115 2008               
JRNL        REFN                   ISSN 0027-8424                                
JRNL        PMID   18332423                                                      
JRNL        DOI    10.1073/PNAS.0800329105                                       
REMARK   2                                                                       
REMARK   2 RESOLUTION.    2.30 ANGSTROMS.                                        
REMARK   3                                                                       
REMARK   3 REFINEMENT.                                                           
REMARK   3   PROGRAM     : REFMAC                                                
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,               
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                              
REMARK   3                                                                       
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                             
REMARK   3                                                                       
REMARK   3  DATA USED IN REFINEMENT.                                             
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30                            
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 42.07                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 100.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 35737                           
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 + TEST SET) : 0.200                            
REMARK   3   R VALUE            (WORKING SET) : 0.198                            
REMARK   3   FREE R VALUE                     : 0.247                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 1773                             
REMARK   3                                                                       
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                   
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.30                          
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.36                          
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2484                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 99.96                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2620                        
REMARK   3   BIN FREE R VALUE SET COUNT          : 124                           
REMARK   3   BIN FREE R VALUE                    : 0.3180                        
REMARK   3                                                                       
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                     
REMARK   3   PROTEIN ATOMS            : 4572                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                        
REMARK   3   HETEROGEN ATOMS          : 91                                       
REMARK   3   SOLVENT ATOMS            : 63                                       
REMARK   3                                                                       
REMARK   3  B VALUES.                                                            
REMARK   3   FROM WILSON PLOT           (A**2) : 42.72                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 40.39                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                        
REMARK   3    B11 (A**2) : -0.08000                                              
REMARK   3    B22 (A**2) : -0.08000                                              
REMARK   3    B33 (A**2) : 0.16000                                               
REMARK   3    B12 (A**2) : 0.00000                                               
REMARK   3    B13 (A**2) : 0.00000                                               
REMARK   3    B23 (A**2) : 0.00000                                               
REMARK   3                                                                       
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                  
REMARK   3   ESU BASED ON R VALUE                            (A): 0.259          
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.215          
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.163          
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 6.715          
REMARK   3                                                                       
REMARK   3 CORRELATION COEFFICIENTS.                                             
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.947                          
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.919                          
REMARK   3                                                                       
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT       
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  4773 ; 0.025 ; 0.022        
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL        
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  6506 ; 2.318 ; 1.978        
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL        
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   576 ; 6.717 ; 5.000        
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   229 ;39.638 ;24.323        
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   794 ;18.626 ;15.000        
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    33 ;23.126 ;15.000        
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   711 ; 0.234 ; 0.200        
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  3667 ; 0.010 ; 0.020        
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL        
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  2297 ; 0.251 ; 0.200        
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL        
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  3340 ; 0.323 ; 0.200        
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL        
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   189 ; 0.171 ; 0.200        
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL        
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL        
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    48 ; 0.258 ; 0.200        
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     2 ; 0.202 ; 0.200        
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL        
REMARK   3                                                                       
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT       
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  2950 ; 1.360 ; 1.500        
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  4635 ; 2.271 ; 2.000        
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  2097 ; 3.585 ; 3.000        
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1871 ; 5.549 ; 4.500        
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL        
REMARK   3                                                                       
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT        
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL        
REMARK   3                                                                       
REMARK   3  NCS RESTRAINTS STATISTICS                                            
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                               
REMARK   3                                                                       
REMARK   3  TLS DETAILS                                                          
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                        
REMARK   3                                                                       
REMARK   3  BULK SOLVENT MODELLING.                                              
REMARK   3   METHOD USED : MASK                                                  
REMARK   3   PARAMETERS FOR MASK CALCULATION                                     
REMARK   3   VDW PROBE RADIUS   : 1.20                                           
REMARK   3   ION PROBE RADIUS   : 0.80                                           
REMARK   3   SHRINKAGE RADIUS   : 0.80                                           
REMARK   3                                                                       
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING    
REMARK   3  POSITIONS                                                            
REMARK   4                                                                       
REMARK   4 3BUL COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                          
REMARK 100                                                                       
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 07-JAN-08.                   
REMARK 100 THE DEPOSITION ID IS D_1000045974.                                    
REMARK 200                                                                       
REMARK 200 EXPERIMENTAL DETAILS                                                  
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                   
REMARK 200  DATE OF DATA COLLECTION        : 01-APR-07                           
REMARK 200  TEMPERATURE           (KELVIN) : NULL                                
REMARK 200  PH                             : 7.2                                 
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                   
REMARK 200                                                                       
REMARK 200  SYNCHROTRON              (Y/N) : Y                                   
REMARK 200  RADIATION SOURCE               : APS                                 
REMARK 200  BEAMLINE                       : 23-ID-B                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                                
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                   
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9793                              
REMARK 200  MONOCHROMATOR                  : DOUBLE CRYSTAL MONOCHROMATOR        
REMARK 200  OPTICS                         : K-B PAIR OF BIOMORPH MIRRORS FOR    
REMARK 200                                   VERTICAL AND HORIZONTAL FOCUSING    
REMARK 200                                                                       
REMARK 200  DETECTOR TYPE                  : CCD                                 
REMARK 200  DETECTOR MANUFACTURER          : MARMOSAIC 300 MM CCD                
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : XDS                                 
REMARK 200  DATA SCALING SOFTWARE          : XSCALE                              
REMARK 200                                                                       
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 35908                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.290                               
REMARK 200  RESOLUTION RANGE LOW       (A) : 42.070                              
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                               
REMARK 200                                                                       
REMARK 200 OVERALL.                                                              
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.2                                
REMARK 200  DATA REDUNDANCY                : 17.30                               
REMARK 200  R MERGE                    (I) : 0.14600                             
REMARK 200  R SYM                      (I) : 0.15100                             
REMARK 200   FOR THE DATA SET  : 16.0000                             
REMARK 200                                                                       
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.29                      
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.43                      
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.3                                
REMARK 200  DATA REDUNDANCY IN SHELL       : 15.01                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.80900                             
REMARK 200  R SYM FOR SHELL            (I) : 0.83800                             
REMARK 200   FOR SHELL         : 3.460                               
REMARK 200                                                                       
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                               
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT         
REMARK 200 SOFTWARE USED: EPMR                                                   
REMARK 200 STARTING MODEL: PDB ENTRY 1K7Y                                        
REMARK 200                                                                       
REMARK 200 REMARK: NULL                                                          
REMARK 280                                                                       
REMARK 280 CRYSTAL                                                               
REMARK 280 SOLVENT CONTENT, VS   (%): 58.92                                      
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.99                      
REMARK 280                                                                       
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.2 M POTASSIUM NITRATE, AND 20 %         
REMARK 280  (W/V) PEG3350, PH 7.2, EVAPORATION, TEMPERATURE 310K                 
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       68.57500             
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000       53.26450             
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       53.26450             
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000      102.86250             
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       53.26450             
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       53.26450             
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       34.28750             
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       53.26450             
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       53.26450             
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000      102.86250             
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       53.26450             
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       53.26450             
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000       34.28750             
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       68.57500             
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 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     ALA A   649                                                       
REMARK 465     GLN A   650                                                       
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   CB   GLU A  1097     O    HOH A  1314              2.05             
REMARK 500                                                                       
REMARK 500 REMARK: NULL                                                          
REMARK 500                                                                       
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                          
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                       
REMARK 500                                                                       
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES               
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE                
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN                
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                  
REMARK 500                                                                       
REMARK 500 STANDARD TABLE:                                                       
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)                
REMARK 500                                                                       
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                         
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                      
REMARK 500                                                                       
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                      
REMARK 500    GLU A 787   CB    GLU A 787   CG      0.127                        
REMARK 500    GLU A 787   CG    GLU A 787   CD      0.162                        
REMARK 500    GLU A 787   CD    GLU A 787   OE2     0.069                        
REMARK 500    GLU A 795   CG    GLU A 795   CD      0.103                        
REMARK 500    GLU A 888   CG    GLU A 888   CD      0.091                        
REMARK 500    GLU A 939   CG    GLU A 939   CD      0.099                        
REMARK 500    TYR A1014   CD1   TYR A1014   CE1     0.098                        
REMARK 500    GLU A1124   CG    GLU A1124   CD      0.109                        
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    ARG A1019   NE  -  CZ  -  NH1 ANGL. DEV. =   3.5 DEGREES           
REMARK 500    ARG A1019   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.4 DEGREES           
REMARK 500    ARG A1094   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES           
REMARK 500    LEU A1120   CB  -  CG  -  CD1 ANGL. DEV. = -10.3 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      106.09    173.24                                    
REMARK 500    ALA A 738       40.36    -71.16                                    
REMARK 500    LYS A 740     -104.05    -51.48                                    
REMARK 500    GLU A 741      158.03    -31.34                                    
REMARK 500    GLN A 742       42.75   -147.93                                    
REMARK 500    CYS A 743      112.33     88.48                                    
REMARK 500    ARG A 876      -58.45    -27.17                                    
REMARK 500    GLN A 893      -81.17    -56.18                                    
REMARK 500    LYS A 897       64.16    -49.87                                    
REMARK 500    LYS A 898      139.45      5.74                                    
REMARK 500    PRO A 899       80.41    -23.39                                    
REMARK 500    ASN A 912       38.62    -94.53                                    
REMARK 500    VAL A 968      -62.20    -93.13                                    
REMARK 500    VAL A1110      -72.83   -126.56                                    
REMARK 500    ALA A1115       57.72   -148.48                                    
REMARK 500    GLU A1118      130.11    -33.56                                    
REMARK 500    ALA A1193     -132.66     75.56                                    
REMARK 500                                                                       
REMARK 500 REMARK: NULL                                                          
REMARK 500                                                                       
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                          
REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS                                          
REMARK 500                                                                       
REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH           
REMARK 500 CIS AND TRANS CONFORMATION.  CIS BONDS, IF ANY, ARE LISTED            
REMARK 500 ON CISPEP RECORDS.  TRANS IS DEFINED AS 180 +/- 30 AND                
REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES.                                   
REMARK 500                                 MODEL     OMEGA                       
REMARK 500 GLN A  742     CYS A  743                  144.99                     
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 B12 A 1301                 
REMARK 900                                                                       
REMARK 900 RELATED ENTRIES                                                       
REMARK 900 RELATED ID: 1K7Y   RELATED DB: PDB                                    
REMARK 900 THE SAME FRAGMENT IN SIMILAR CONFORMATION WITH H759 PRESENT           
DBREF  3BUL A  649  1227  UNP    P13009   METH_ECOLI     649   1227              
SEQADV 3BUL CYS A  690  UNP  P13009    ILE   690 ENGINEERED MUTATION             
SEQADV 3BUL CYS A  743  UNP  P13009    GLY   743 ENGINEERED MUTATION             
SEQRES   1 A  579  ALA GLN GLN ALA GLU TRP ARG SER TRP GLU VAL ASN LYS           
SEQRES   2 A  579  ARG LEU GLU TYR SER LEU VAL LYS GLY ILE THR GLU PHE           
SEQRES   3 A  579  ILE GLU GLN ASP THR GLU GLU ALA ARG GLN GLN ALA THR           
SEQRES   4 A  579  ARG PRO CYS GLU VAL ILE GLU GLY PRO LEU MET ASP GLY           
SEQRES   5 A  579  MET ASN VAL VAL GLY ASP LEU PHE GLY GLU GLY LYS MET           
SEQRES   6 A  579  PHE LEU PRO GLN VAL VAL LYS SER ALA ARG VAL MET LYS           
SEQRES   7 A  579  GLN ALA VAL ALA TYR LEU GLU PRO PHE ILE GLU ALA SER           
SEQRES   8 A  579  LYS GLU GLN CYS LYS THR ASN GLY LYS MET VAL ILE ALA           
SEQRES   9 A  579  THR VAL LYS GLY ASP VAL HIS ASP ILE GLY LYS ASN ILE           
SEQRES  10 A  579  VAL GLY VAL VAL LEU GLN CYS ASN ASN TYR GLU ILE VAL           
SEQRES  11 A  579  ASP LEU GLY VAL MET VAL PRO ALA GLU LYS ILE LEU ARG           
SEQRES  12 A  579  THR ALA LYS GLU VAL ASN ALA ASP LEU ILE GLY LEU SER           
SEQRES  13 A  579  GLY LEU ILE THR PRO SER LEU ASP GLU MET VAL ASN VAL           
SEQRES  14 A  579  ALA LYS GLU MET GLU ARG GLN GLY PHE THR ILE PRO LEU           
SEQRES  15 A  579  LEU ILE GLY GLY ALA THR THR SER LYS ALA HIS THR ALA           
SEQRES  16 A  579  VAL LYS ILE GLU GLN ASN TYR SER GLY PRO THR VAL TYR           
SEQRES  17 A  579  VAL GLN ASN ALA SER ARG THR VAL GLY VAL VAL ALA ALA           
SEQRES  18 A  579  LEU LEU SER ASP THR GLN ARG ASP ASP PHE VAL ALA ARG           
SEQRES  19 A  579  THR ARG LYS GLU TYR GLU THR VAL ARG ILE GLN HIS GLY           
SEQRES  20 A  579  ARG LYS LYS PRO ARG THR PRO PRO VAL THR LEU GLU ALA           
SEQRES  21 A  579  ALA ARG ASP ASN ASP PHE ALA PHE ASP TRP GLN ALA TYR           
SEQRES  22 A  579  THR PRO PRO VAL ALA HIS ARG LEU GLY VAL GLN GLU VAL           
SEQRES  23 A  579  GLU ALA SER ILE GLU THR LEU ARG ASN TYR ILE ASP TRP           
SEQRES  24 A  579  THR PRO PHE PHE MET THR TRP SER LEU ALA GLY LYS TYR           
SEQRES  25 A  579  PRO ARG ILE LEU GLU ASP GLU VAL VAL GLY VAL GLU ALA           
SEQRES  26 A  579  GLN ARG LEU PHE LYS ASP ALA ASN ASP MET LEU ASP LYS           
SEQRES  27 A  579  LEU SER ALA GLU LYS THR LEU ASN PRO ARG GLY VAL VAL           
SEQRES  28 A  579  GLY LEU PHE PRO ALA ASN ARG VAL GLY ASP ASP ILE GLU           
SEQRES  29 A  579  ILE TYR ARG ASP GLU THR ARG THR HIS VAL ILE ASN VAL           
SEQRES  30 A  579  SER HIS HIS LEU ARG GLN GLN THR GLU LYS THR GLY PHE           
SEQRES  31 A  579  ALA ASN TYR CYS LEU ALA ASP PHE VAL ALA PRO LYS LEU           
SEQRES  32 A  579  SER GLY LYS ALA ASP TYR ILE GLY ALA PHE ALA VAL THR           
SEQRES  33 A  579  GLY GLY LEU GLU GLU ASP ALA LEU ALA ASP ALA PHE GLU           
SEQRES  34 A  579  ALA GLN HIS ASP ASP TYR ASN LYS ILE MET VAL LYS ALA           
SEQRES  35 A  579  LEU ALA ASP ARG LEU ALA GLU ALA PHE ALA GLU TYR LEU           
SEQRES  36 A  579  HIS GLU ARG VAL ARG LYS VAL TYR TRP GLY TYR ALA PRO           
SEQRES  37 A  579  ASN GLU ASN LEU SER ASN GLU GLU LEU ILE ARG GLU ASN           
SEQRES  38 A  579  TYR GLN GLY ILE ARG PRO ALA PRO GLY TYR PRO ALA CYS           
SEQRES  39 A  579  PRO GLU HIS THR GLU LYS ALA THR ILE TRP GLU LEU LEU           
SEQRES  40 A  579  GLU VAL GLU LYS HIS THR GLY MET LYS LEU THR GLU SER           
SEQRES  41 A  579  PHE ALA MET TRP PRO GLY ALA SER VAL SER GLY TRP TYR           
SEQRES  42 A  579  PHE SER HIS PRO ASP SER LYS TYR TYR ALA VAL ALA GLN           
SEQRES  43 A  579  ILE GLN ARG ASP GLN VAL GLU ASP TYR ALA ARG ARG LYS           
SEQRES  44 A  579  GLY MET SER VAL THR GLU VAL GLU ARG TRP LEU ALA PRO           
SEQRES  45 A  579  ASN LEU GLY TYR ASP ALA ASP                                   
HET    B12  A1301      91                                                        
HETNAM     B12 COBALAMIN                                                         
FORMUL   2  B12    C62 H89 CO N13 O14 P 2+                                       
FORMUL   3  HOH   *63(H2 O)                                                      
HELIX    1   1 ALA A  652  TRP A  657  5                                   6     
HELIX    2   2 GLU A  658  GLY A  670  1                                  13     
HELIX    3   3 PHE A  674  ALA A  686  1                                  13     
HELIX    4   4 CYS A  690  GLY A  695  1                                   6     
HELIX    5   5 GLY A  695  GLY A  711  1                                  17     
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 THR A  808  GLN A  824  1                                  17     
HELIX   10  10 SER A  838  ILE A  846  1                                   9     
HELIX   11  11 GLU A  847  TYR A  850  5                                   4     
HELIX   12  12 ASN A  859  LEU A  871  1                                  13     
HELIX   13  13 GLN A  875  HIS A  894  1                                  20     
HELIX   14  14 THR A  905  ASN A  912  1                                   8     
HELIX   15  15 ASP A  917  TYR A  921  5                                   5     
HELIX   16  16 SER A  937  ASN A  943  1                                   7     
HELIX   17  17 TRP A  947  TRP A  954  1                                   8     
HELIX   18  18 PRO A  961  ASP A  966  5                                   6     
HELIX   19  19 VAL A  969  GLU A  990  1                                  22     
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  GLY A 1162  1                                   7     
HELIX   28  28 GLN A 1196  LYS A 1207  1                                  12     
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  VAL A 778            
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 GLY A 930  GLU A 935  0                                         
SHEET    2   B 4 ARG A 996  VAL A1007 -1  O  VAL A 999   N  GLN A 932            
SHEET    3   B 4 ASP A1010  TYR A1014 -1  O  GLU A1012   N  ASN A1005            
SHEET    4   B 4 VAL A1022  HIS A1027 -1  O  SER A1026   N  ILE A1011            
SHEET    1   C 4 GLY A 930  GLU A 935  0                                         
SHEET    2   C 4 ARG A 996  VAL A1007 -1  O  VAL A 999   N  GLN A 932            
SHEET    3   C 4 ASP A1056  THR A1064 -1  O  ALA A1062   N  VAL A 998            
SHEET    4   C 4 SER A1176  TYR A1181 -1  O  VAL A1177   N  VAL A1063            
SHEET    1   D 2 LYS A1164  LEU A1165  0                                         
SHEET    2   D 2 MET A1171  TRP A1172 -1  O  TRP A1172   N  LYS A1164            
SSBOND   1 CYS A  690    CYS A  743                          1555   1555  2.07   
CISPEP   1 TYR A  960    PRO A  961          0        -0.17                      
CISPEP   2 TRP A 1172    PRO A 1173          0         0.22                      
SITE     1 AC1 33 HIS A 759  GLY A 802  LEU A 803  SER A 804                     
SITE     2 AC1 33 LEU A 806  ILE A 807  THR A 808  ARG A 823                     
SITE     3 AC1 33 GLN A 824  LEU A 831  GLY A 833  GLY A 834                     
SITE     4 AC1 33 ALA A 835  THR A 836  GLN A 858  ASN A 859                     
SITE     5 AC1 33 ALA A 860  THR A 863  MET A 952  ASP A1093                     
SITE     6 AC1 33 ALA A1136  PRO A1137  GLY A1138  TYR A1139                     
SITE     7 AC1 33 HIS A1145  ALA A1170  MET A1171  PRO A1173                     
SITE     8 AC1 33 GLY A1174  SER A1176  SER A1178  HOH A1331                     
SITE     9 AC1 33 HOH A1342                                                      
CRYST1  106.529  106.529  137.150  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      0.009387  0.000000  0.000000        0.00000                          
SCALE2      0.000000  0.009387  0.000000        0.00000                          
SCALE3      0.000000  0.000000  0.007291        0.00000                          
END