HEADER    TRANSFERASE                             22-SEP-00   1FWL              
TITLE     CRYSTAL STRUCTURE OF HOMOSERINE KINASE                                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: HOMOSERINE KINASE;                                         
COMPND   3 CHAIN: A, B, C, D;                                                   
COMPND   4 SYNONYM: HK;                                                         
COMPND   5 EC: 2.7.1.39;                                                        
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: METHANOCALDOCOCCUS JANNASCHII;                  
SOURCE   3 ORGANISM_TAXID: 2190;                                                
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    KINASE, TRANSFERASE                                                   
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    T.ZHOU,M.DAUGHERTY,N.V.GRISHIN,A.L.OSTERMAN,H.ZHANG                   
REVDAT   3   07-FEB-24 1FWL    1       REMARK                                   
REVDAT   2   24-FEB-09 1FWL    1       VERSN                                    
REVDAT   1   20-DEC-00 1FWL    0                                                
JRNL        AUTH   T.ZHOU,M.DAUGHERTY,N.V.GRISHIN,A.L.OSTERMAN,H.ZHANG          
JRNL        TITL   STRUCTURE AND MECHANISM OF HOMOSERINE KINASE: PROTOTYPE FOR  
JRNL        TITL 2 THE GHMP KINASE SUPERFAMILY.                                 
JRNL        REF    STRUCTURE FOLD.DES.           V.   8  1247 2000              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   11188689                                                     
JRNL        DOI    10.1016/S0969-2126(00)00533-5                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.25 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) : 2.25                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
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)   (%) : 97.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 76716                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : FREE-R                          
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.204                           
REMARK   3   FREE R VALUE                     : 0.248                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 3893                            
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            : 9076                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 506                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 41.80                          
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) : 1.670                           
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 1FWL COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-OCT-00.                  
REMARK 100 THE DEPOSITION ID IS D_1000011959.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 20-APR-00                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 8.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU300                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
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   : 78267                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.250                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 40.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.8                               
REMARK 200  DATA REDUNDANCY                : 3.300                              
REMARK 200  R MERGE                    (I) : 0.04100                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 29.2000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.25                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.29                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 96.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.30900                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: MLPHARE                                               
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 62.20                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.25                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG4000, SODIUM ACETATE, PH 8.0, VAPOR   
REMARK 280  DIFFUSION, HANGING DROP, TEMPERATURE 293K                           
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-Z                                             
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       64.36050            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A DIMER: CHAIN A AND B OR CHAIN   
REMARK 300 C AND D.                                                             
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2890 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 24060 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -27.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2900 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 23570 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -27.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, D                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 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   O    ARG D   282     O    TYR D   285              1.93            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    PRO B  59   C   -  N   -  CA  ANGL. DEV. =   9.7 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ASN A  17      -56.38     73.23                                   
REMARK 500    VAL A  24      -58.44   -122.68                                   
REMARK 500    LYS A  44       53.62    -60.92                                   
REMARK 500    GLU A 157      104.74   -163.28                                   
REMARK 500    LYS A 250      -57.23    -26.82                                   
REMARK 500    THR A 291     -158.25   -141.74                                   
REMARK 500    ASN B  17      -63.27     85.70                                   
REMARK 500    VAL B  24      -56.50   -127.30                                   
REMARK 500    LYS B  44       45.35    -67.43                                   
REMARK 500    ASP B  51      -32.01    -29.52                                   
REMARK 500    PRO B  59      -24.46    -37.19                                   
REMARK 500    LYS B  70      -16.93    -48.67                                   
REMARK 500    LEU B 117      173.29    -53.67                                   
REMARK 500    SER B 134       -2.57   -150.52                                   
REMARK 500    ARG B 187      -32.96   -131.97                                   
REMARK 500    ASN B 241       -3.65     65.50                                   
REMARK 500    LYS B 250      -61.30    -22.99                                   
REMARK 500    THR B 291     -156.66   -135.05                                   
REMARK 500    ASN C  17      -57.71     71.69                                   
REMARK 500    PHE C  22      120.21    -39.91                                   
REMARK 500    VAL C  24      -57.30   -126.83                                   
REMARK 500    LYS C  44       60.99    -60.23                                   
REMARK 500    ASP C  51       39.87    -80.01                                   
REMARK 500    ASP C  52       95.05   -161.69                                   
REMARK 500    ASN C  54      -10.71    -49.87                                   
REMARK 500    LYS C 114       56.11     38.60                                   
REMARK 500    ASN C 155      144.53   -173.33                                   
REMARK 500    ASN C 178       32.00    -80.35                                   
REMARK 500    GLU C 185      -11.62    -47.93                                   
REMARK 500    ARG C 187       31.76    -87.47                                   
REMARK 500    THR C 291     -158.69   -143.82                                   
REMARK 500    ASN D  17      -64.10     79.18                                   
REMARK 500    VAL D  24      -61.00   -128.39                                   
REMARK 500    LYS D  44       61.89    -65.61                                   
REMARK 500    ALA D 132      -38.86    -38.06                                   
REMARK 500    SER D 134      -15.08    174.68                                   
REMARK 500    GLU D 157       80.20     43.45                                   
REMARK 500    ASN D 178       46.21    -80.79                                   
REMARK 500    LYS D 250      -56.40    -29.35                                   
REMARK 500    THR D 291     -152.87   -139.77                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500    TYR A 156         0.07    SIDE CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1FWK   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUTCURE OF HOMOSERINE KINASE COMPLEXED WITH ADP            
DBREF  1FWL A    5   300  UNP    Q58504   KHSE_METJA       5    300             
DBREF  1FWL B    5   300  UNP    Q58504   KHSE_METJA       5    300             
DBREF  1FWL C    5   300  UNP    Q58504   KHSE_METJA       5    300             
DBREF  1FWL D    5   300  UNP    Q58504   KHSE_METJA       5    300             
SEQRES   1 A  296  MET LYS VAL ARG VAL LYS ALA PRO CYS THR SER ALA ASN          
SEQRES   2 A  296  LEU GLY VAL GLY PHE ASP VAL PHE GLY LEU CYS LEU LYS          
SEQRES   3 A  296  GLU PRO TYR ASP VAL ILE GLU VAL GLU ALA ILE ASP ASP          
SEQRES   4 A  296  LYS GLU ILE ILE ILE GLU VAL ASP ASP LYS ASN ILE PRO          
SEQRES   5 A  296  THR ASP PRO ASP LYS ASN VAL ALA GLY ILE VAL ALA LYS          
SEQRES   6 A  296  LYS MET ILE ASP ASP PHE ASN ILE GLY LYS GLY VAL LYS          
SEQRES   7 A  296  ILE THR ILE LYS LYS GLY VAL LYS ALA GLY SER GLY LEU          
SEQRES   8 A  296  GLY SER SER ALA ALA SER SER ALA GLY THR ALA TYR ALA          
SEQRES   9 A  296  ILE ASN GLU LEU PHE LYS LEU ASN LEU ASP LYS LEU LYS          
SEQRES  10 A  296  LEU VAL ASP TYR ALA SER TYR GLY GLU LEU ALA SER SER          
SEQRES  11 A  296  GLY ALA LYS HIS ALA ASP ASN VAL ALA PRO ALA ILE PHE          
SEQRES  12 A  296  GLY GLY PHE THR MET VAL THR ASN TYR GLU PRO LEU GLU          
SEQRES  13 A  296  VAL LEU HIS ILE PRO ILE ASP PHE LYS LEU ASP ILE LEU          
SEQRES  14 A  296  ILE ALA ILE PRO ASN ILE SER ILE ASN THR LYS GLU ALA          
SEQRES  15 A  296  ARG GLU ILE LEU PRO LYS ALA VAL GLY LEU LYS ASP LEU          
SEQRES  16 A  296  VAL ASN ASN VAL GLY LYS ALA CYS GLY MET VAL TYR ALA          
SEQRES  17 A  296  LEU TYR ASN LYS ASP LYS SER LEU PHE GLY ARG TYR MET          
SEQRES  18 A  296  MET SER ASP LYS VAL ILE GLU PRO VAL ARG GLY LYS LEU          
SEQRES  19 A  296  ILE PRO ASN TYR PHE LYS ILE LYS GLU GLU VAL LYS ASP          
SEQRES  20 A  296  LYS VAL TYR GLY ILE THR ILE SER GLY SER GLY PRO SER          
SEQRES  21 A  296  ILE ILE ALA PHE PRO LYS GLU GLU PHE ILE ASP GLU VAL          
SEQRES  22 A  296  GLU ASN ILE LEU ARG ASP TYR TYR GLU ASN THR ILE ARG          
SEQRES  23 A  296  THR GLU VAL GLY LYS GLY VAL GLU VAL VAL                      
SEQRES   1 B  296  MET LYS VAL ARG VAL LYS ALA PRO CYS THR SER ALA ASN          
SEQRES   2 B  296  LEU GLY VAL GLY PHE ASP VAL PHE GLY LEU CYS LEU LYS          
SEQRES   3 B  296  GLU PRO TYR ASP VAL ILE GLU VAL GLU ALA ILE ASP ASP          
SEQRES   4 B  296  LYS GLU ILE ILE ILE GLU VAL ASP ASP LYS ASN ILE PRO          
SEQRES   5 B  296  THR ASP PRO ASP LYS ASN VAL ALA GLY ILE VAL ALA LYS          
SEQRES   6 B  296  LYS MET ILE ASP ASP PHE ASN ILE GLY LYS GLY VAL LYS          
SEQRES   7 B  296  ILE THR ILE LYS LYS GLY VAL LYS ALA GLY SER GLY LEU          
SEQRES   8 B  296  GLY SER SER ALA ALA SER SER ALA GLY THR ALA TYR ALA          
SEQRES   9 B  296  ILE ASN GLU LEU PHE LYS LEU ASN LEU ASP LYS LEU LYS          
SEQRES  10 B  296  LEU VAL ASP TYR ALA SER TYR GLY GLU LEU ALA SER SER          
SEQRES  11 B  296  GLY ALA LYS HIS ALA ASP ASN VAL ALA PRO ALA ILE PHE          
SEQRES  12 B  296  GLY GLY PHE THR MET VAL THR ASN TYR GLU PRO LEU GLU          
SEQRES  13 B  296  VAL LEU HIS ILE PRO ILE ASP PHE LYS LEU ASP ILE LEU          
SEQRES  14 B  296  ILE ALA ILE PRO ASN ILE SER ILE ASN THR LYS GLU ALA          
SEQRES  15 B  296  ARG GLU ILE LEU PRO LYS ALA VAL GLY LEU LYS ASP LEU          
SEQRES  16 B  296  VAL ASN ASN VAL GLY LYS ALA CYS GLY MET VAL TYR ALA          
SEQRES  17 B  296  LEU TYR ASN LYS ASP LYS SER LEU PHE GLY ARG TYR MET          
SEQRES  18 B  296  MET SER ASP LYS VAL ILE GLU PRO VAL ARG GLY LYS LEU          
SEQRES  19 B  296  ILE PRO ASN TYR PHE LYS ILE LYS GLU GLU VAL LYS ASP          
SEQRES  20 B  296  LYS VAL TYR GLY ILE THR ILE SER GLY SER GLY PRO SER          
SEQRES  21 B  296  ILE ILE ALA PHE PRO LYS GLU GLU PHE ILE ASP GLU VAL          
SEQRES  22 B  296  GLU ASN ILE LEU ARG ASP TYR TYR GLU ASN THR ILE ARG          
SEQRES  23 B  296  THR GLU VAL GLY LYS GLY VAL GLU VAL VAL                      
SEQRES   1 C  296  MET LYS VAL ARG VAL LYS ALA PRO CYS THR SER ALA ASN          
SEQRES   2 C  296  LEU GLY VAL GLY PHE ASP VAL PHE GLY LEU CYS LEU LYS          
SEQRES   3 C  296  GLU PRO TYR ASP VAL ILE GLU VAL GLU ALA ILE ASP ASP          
SEQRES   4 C  296  LYS GLU ILE ILE ILE GLU VAL ASP ASP LYS ASN ILE PRO          
SEQRES   5 C  296  THR ASP PRO ASP LYS ASN VAL ALA GLY ILE VAL ALA LYS          
SEQRES   6 C  296  LYS MET ILE ASP ASP PHE ASN ILE GLY LYS GLY VAL LYS          
SEQRES   7 C  296  ILE THR ILE LYS LYS GLY VAL LYS ALA GLY SER GLY LEU          
SEQRES   8 C  296  GLY SER SER ALA ALA SER SER ALA GLY THR ALA TYR ALA          
SEQRES   9 C  296  ILE ASN GLU LEU PHE LYS LEU ASN LEU ASP LYS LEU LYS          
SEQRES  10 C  296  LEU VAL ASP TYR ALA SER TYR GLY GLU LEU ALA SER SER          
SEQRES  11 C  296  GLY ALA LYS HIS ALA ASP ASN VAL ALA PRO ALA ILE PHE          
SEQRES  12 C  296  GLY GLY PHE THR MET VAL THR ASN TYR GLU PRO LEU GLU          
SEQRES  13 C  296  VAL LEU HIS ILE PRO ILE ASP PHE LYS LEU ASP ILE LEU          
SEQRES  14 C  296  ILE ALA ILE PRO ASN ILE SER ILE ASN THR LYS GLU ALA          
SEQRES  15 C  296  ARG GLU ILE LEU PRO LYS ALA VAL GLY LEU LYS ASP LEU          
SEQRES  16 C  296  VAL ASN ASN VAL GLY LYS ALA CYS GLY MET VAL TYR ALA          
SEQRES  17 C  296  LEU TYR ASN LYS ASP LYS SER LEU PHE GLY ARG TYR MET          
SEQRES  18 C  296  MET SER ASP LYS VAL ILE GLU PRO VAL ARG GLY LYS LEU          
SEQRES  19 C  296  ILE PRO ASN TYR PHE LYS ILE LYS GLU GLU VAL LYS ASP          
SEQRES  20 C  296  LYS VAL TYR GLY ILE THR ILE SER GLY SER GLY PRO SER          
SEQRES  21 C  296  ILE ILE ALA PHE PRO LYS GLU GLU PHE ILE ASP GLU VAL          
SEQRES  22 C  296  GLU ASN ILE LEU ARG ASP TYR TYR GLU ASN THR ILE ARG          
SEQRES  23 C  296  THR GLU VAL GLY LYS GLY VAL GLU VAL VAL                      
SEQRES   1 D  296  MET LYS VAL ARG VAL LYS ALA PRO CYS THR SER ALA ASN          
SEQRES   2 D  296  LEU GLY VAL GLY PHE ASP VAL PHE GLY LEU CYS LEU LYS          
SEQRES   3 D  296  GLU PRO TYR ASP VAL ILE GLU VAL GLU ALA ILE ASP ASP          
SEQRES   4 D  296  LYS GLU ILE ILE ILE GLU VAL ASP ASP LYS ASN ILE PRO          
SEQRES   5 D  296  THR ASP PRO ASP LYS ASN VAL ALA GLY ILE VAL ALA LYS          
SEQRES   6 D  296  LYS MET ILE ASP ASP PHE ASN ILE GLY LYS GLY VAL LYS          
SEQRES   7 D  296  ILE THR ILE LYS LYS GLY VAL LYS ALA GLY SER GLY LEU          
SEQRES   8 D  296  GLY SER SER ALA ALA SER SER ALA GLY THR ALA TYR ALA          
SEQRES   9 D  296  ILE ASN GLU LEU PHE LYS LEU ASN LEU ASP LYS LEU LYS          
SEQRES  10 D  296  LEU VAL ASP TYR ALA SER TYR GLY GLU LEU ALA SER SER          
SEQRES  11 D  296  GLY ALA LYS HIS ALA ASP ASN VAL ALA PRO ALA ILE PHE          
SEQRES  12 D  296  GLY GLY PHE THR MET VAL THR ASN TYR GLU PRO LEU GLU          
SEQRES  13 D  296  VAL LEU HIS ILE PRO ILE ASP PHE LYS LEU ASP ILE LEU          
SEQRES  14 D  296  ILE ALA ILE PRO ASN ILE SER ILE ASN THR LYS GLU ALA          
SEQRES  15 D  296  ARG GLU ILE LEU PRO LYS ALA VAL GLY LEU LYS ASP LEU          
SEQRES  16 D  296  VAL ASN ASN VAL GLY LYS ALA CYS GLY MET VAL TYR ALA          
SEQRES  17 D  296  LEU TYR ASN LYS ASP LYS SER LEU PHE GLY ARG TYR MET          
SEQRES  18 D  296  MET SER ASP LYS VAL ILE GLU PRO VAL ARG GLY LYS LEU          
SEQRES  19 D  296  ILE PRO ASN TYR PHE LYS ILE LYS GLU GLU VAL LYS ASP          
SEQRES  20 D  296  LYS VAL TYR GLY ILE THR ILE SER GLY SER GLY PRO SER          
SEQRES  21 D  296  ILE ILE ALA PHE PRO LYS GLU GLU PHE ILE ASP GLU VAL          
SEQRES  22 D  296  GLU ASN ILE LEU ARG ASP TYR TYR GLU ASN THR ILE ARG          
SEQRES  23 D  296  THR GLU VAL GLY LYS GLY VAL GLU VAL VAL                      
FORMUL   5  HOH   *506(H2 O)                                                    
HELIX    1   1 ASN A   62  PHE A   75  1                                  14    
HELIX    2   2 GLY A   96  PHE A  113  1                                  18    
HELIX    3   3 ASP A  118  GLY A  135  1                                  18    
HELIX    4   4 HIS A  138  GLY A  148  1                                  11    
HELIX    5   5 ASN A  182  LEU A  190  1                                   9    
HELIX    6   6 LEU A  196  ASN A  215  1                                  20    
HELIX    7   7 ASP A  217  MET A  226  1                                  10    
HELIX    8   8 ILE A  231  GLY A  236  1                                   6    
HELIX    9   9 LYS A  237  ILE A  239  5                                   3    
HELIX   10  10 ASN A  241  LYS A  250  1                                  10    
HELIX   11  11 PHE A  273  TYR A  285  1                                  13    
HELIX   12  12 LEU B   18  PHE B   22  5                                   5    
HELIX   13  13 ASN B   62  ASN B   76  1                                  15    
HELIX   14  14 GLY B   96  PHE B  113  1                                  18    
HELIX   15  15 ASP B  118  GLY B  135  1                                  18    
HELIX   16  16 HIS B  138  GLY B  148  1                                  11    
HELIX   17  17 LYS B  184  GLU B  188  5                                   5    
HELIX   18  18 LEU B  196  ASN B  215  1                                  20    
HELIX   19  19 ASP B  217  MET B  226  1                                  10    
HELIX   20  20 ILE B  231  GLY B  236  1                                   6    
HELIX   21  21 LYS B  237  ILE B  239  5                                   3    
HELIX   22  22 ASN B  241  LYS B  250  1                                  10    
HELIX   23  23 PHE B  273  TYR B  285  1                                  13    
HELIX   24  24 LEU C   18  PHE C   22  5                                   5    
HELIX   25  25 ASN C   62  PHE C   75  1                                  14    
HELIX   26  26 GLY C   96  PHE C  113  1                                  18    
HELIX   27  27 ASP C  118  GLY C  135  1                                  18    
HELIX   28  28 ASN C  141  GLY C  148  1                                   8    
HELIX   29  29 LEU C  196  ASN C  215  1                                  20    
HELIX   30  30 ASP C  217  MET C  226  1                                  10    
HELIX   31  31 ILE C  231  GLY C  236  1                                   6    
HELIX   32  32 LYS C  237  ILE C  239  5                                   3    
HELIX   33  33 ASN C  241  LYS C  250  1                                  10    
HELIX   34  34 PHE C  273  TYR C  285  1                                  13    
HELIX   35  35 ASN D   62  PHE D   75  1                                  14    
HELIX   36  36 GLY D   96  PHE D  113  1                                  18    
HELIX   37  37 ASP D  118  SER D  133  1                                  16    
HELIX   38  38 HIS D  138  GLY D  148  1                                  11    
HELIX   39  39 ASN D  182  ILE D  189  1                                   8    
HELIX   40  40 LEU D  196  ASN D  215  1                                  20    
HELIX   41  41 ASP D  217  MET D  226  1                                  10    
HELIX   42  42 ILE D  231  GLY D  236  1                                   6    
HELIX   43  43 LYS D  237  ILE D  239  5                                   3    
HELIX   44  44 ASN D  241  LYS D  250  1                                  10    
HELIX   45  45 PHE D  273  TYR D  285  1                                  13    
SHEET    1   A 5 GLU A 298  VAL A 299  0                                        
SHEET    2   A 5 LYS A   6  ALA A  16 -1  N  LYS A  10   O  GLU A 298           
SHEET    3   A 5 PHE A  25  ILE A  41 -1  O  LEU A  27   N  SER A  15           
SHEET    4   A 5 GLY A  80  LYS A  86 -1  N  GLY A  80   O  ILE A  41           
SHEET    5   A 5 ILE A  46  VAL A  50  1  O  ILE A  47   N  ILE A  83           
SHEET    1   B 5 GLU A 298  VAL A 299  0                                        
SHEET    2   B 5 LYS A   6  ALA A  16 -1  N  LYS A  10   O  GLU A 298           
SHEET    3   B 5 PHE A  25  ILE A  41 -1  O  LEU A  27   N  SER A  15           
SHEET    4   B 5 PHE A 150  ASN A 155 -1  N  THR A 151   O  GLY A  26           
SHEET    5   B 5 GLU A 160  ILE A 164 -1  N  GLU A 160   O  ASN A 155           
SHEET    1   C 4 VAL A 253  ILE A 258  0                                        
SHEET    2   C 4 ILE A 265  PRO A 269 -1  N  ILE A 266   O  THR A 257           
SHEET    3   C 4 ASP A 171  ALA A 175 -1  N  LEU A 173   O  ALA A 267           
SHEET    4   C 4 THR A 288  GLU A 292 -1  O  ILE A 289   N  ILE A 174           
SHEET    1   D 2 ALA A 193  GLY A 195  0                                        
SHEET    2   D 2 ALA B 193  GLY B 195 -1  N  VAL B 194   O  VAL A 194           
SHEET    1   E 5 GLU B 298  VAL B 299  0                                        
SHEET    2   E 5 LYS B   6  ALA B  16 -1  N  LYS B  10   O  GLU B 298           
SHEET    3   E 5 PHE B  25  ILE B  41 -1  O  LEU B  27   N  SER B  15           
SHEET    4   E 5 GLY B  80  LYS B  86 -1  O  GLY B  80   N  ILE B  41           
SHEET    5   E 5 ILE B  46  VAL B  50  1  O  ILE B  47   N  ILE B  83           
SHEET    1   F 5 GLU B 298  VAL B 299  0                                        
SHEET    2   F 5 LYS B   6  ALA B  16 -1  N  LYS B  10   O  GLU B 298           
SHEET    3   F 5 PHE B  25  ILE B  41 -1  O  LEU B  27   N  SER B  15           
SHEET    4   F 5 PHE B 150  ASN B 155 -1  N  THR B 151   O  GLY B  26           
SHEET    5   F 5 GLU B 160  ILE B 164 -1  N  GLU B 160   O  ASN B 155           
SHEET    1   G 4 VAL B 253  ILE B 258  0                                        
SHEET    2   G 4 ILE B 265  PRO B 269 -1  N  ILE B 266   O  THR B 257           
SHEET    3   G 4 ASP B 171  ILE B 176 -1  O  LEU B 173   N  ALA B 267           
SHEET    4   G 4 ASN B 287  GLU B 292 -1  O  ASN B 287   N  ILE B 176           
SHEET    1   H 5 GLU C 298  VAL C 299  0                                        
SHEET    2   H 5 LYS C   6  ALA C  16 -1  N  LYS C  10   O  GLU C 298           
SHEET    3   H 5 PHE C  25  ILE C  41 -1  O  LEU C  27   N  SER C  15           
SHEET    4   H 5 GLY C  80  LYS C  86 -1  N  GLY C  80   O  ILE C  41           
SHEET    5   H 5 ILE C  46  VAL C  50  1  O  ILE C  47   N  ILE C  83           
SHEET    1   I 5 GLU C 298  VAL C 299  0                                        
SHEET    2   I 5 LYS C   6  ALA C  16 -1  N  LYS C  10   O  GLU C 298           
SHEET    3   I 5 PHE C  25  ILE C  41 -1  O  LEU C  27   N  SER C  15           
SHEET    4   I 5 PHE C 150  ASN C 155 -1  N  THR C 151   O  GLY C  26           
SHEET    5   I 5 GLU C 160  ILE C 164 -1  N  GLU C 160   O  ASN C 155           
SHEET    1   J 4 VAL C 253  ILE C 258  0                                        
SHEET    2   J 4 ILE C 265  PRO C 269 -1  N  ILE C 266   O  THR C 257           
SHEET    3   J 4 ASP C 171  ALA C 175 -1  O  LEU C 173   N  ALA C 267           
SHEET    4   J 4 THR C 288  GLU C 292 -1  O  ILE C 289   N  ILE C 174           
SHEET    1   K 2 ALA C 193  GLY C 195  0                                        
SHEET    2   K 2 ALA D 193  GLY D 195 -1  O  VAL D 194   N  VAL C 194           
SHEET    1   L 5 GLU D 298  VAL D 299  0                                        
SHEET    2   L 5 LYS D   6  ALA D  16 -1  N  LYS D  10   O  GLU D 298           
SHEET    3   L 5 PHE D  25  ILE D  41 -1  O  LEU D  27   N  SER D  15           
SHEET    4   L 5 GLY D  80  LYS D  86 -1  N  GLY D  80   O  ILE D  41           
SHEET    5   L 5 ILE D  46  VAL D  50  1  O  ILE D  47   N  ILE D  83           
SHEET    1   M 5 GLU D 298  VAL D 299  0                                        
SHEET    2   M 5 LYS D   6  ALA D  16 -1  N  LYS D  10   O  GLU D 298           
SHEET    3   M 5 PHE D  25  ILE D  41 -1  O  LEU D  27   N  SER D  15           
SHEET    4   M 5 PHE D 150  ASN D 155 -1  N  THR D 151   O  GLY D  26           
SHEET    5   M 5 GLU D 160  ILE D 164 -1  N  GLU D 160   O  ASN D 155           
SHEET    1   N 4 VAL D 253  ILE D 258  0                                        
SHEET    2   N 4 ILE D 265  PRO D 269 -1  O  ILE D 266   N  THR D 257           
SHEET    3   N 4 ILE D 172  ALA D 175 -1  O  LEU D 173   N  ALA D 267           
SHEET    4   N 4 THR D 288  THR D 291 -1  O  ILE D 289   N  ILE D 174           
CISPEP   1 GLU A   31    PRO A   32          0        -0.13                     
CISPEP   2 GLU A  157    PRO A  158          0        -1.30                     
CISPEP   3 GLY A  262    PRO A  263          0         0.71                     
CISPEP   4 GLU B   31    PRO B   32          0         0.09                     
CISPEP   5 GLU B  157    PRO B  158          0        -0.76                     
CISPEP   6 GLY B  262    PRO B  263          0        -0.17                     
CISPEP   7 GLU C   31    PRO C   32          0        -0.97                     
CISPEP   8 GLU C  157    PRO C  158          0        -2.04                     
CISPEP   9 GLY C  262    PRO C  263          0         0.51                     
CISPEP  10 GLU D   31    PRO D   32          0         0.17                     
CISPEP  11 GLU D  157    PRO D  158          0         1.03                     
CISPEP  12 GLY D  262    PRO D  263          0         0.55                     
CRYST1   61.993  128.721  109.423  90.00 105.57  90.00 P 1 21 1      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      0.016131  0.000000  0.004495        0.00000                         
SCALE2      0.000000  0.007769  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.009487        0.00000