HEADER    TRANSFERASE                             25-JUL-00   1FFL              
TITLE     CRYSTAL STRUCTURE OF THE APO-THYMIDYLATE SYNTHASE R166Q MUTANT        
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: THYMIDYLATE SYNTHASE;                                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 2.1.1.45;                                                        
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: XAC 25: LACKS HOST THYMIDYLATE SYNTHASE    
SOURCE   7 GENE;                                                                
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: BLUESCRIPT PLASMID SK+                    
KEYWDS    TRANSFERASE, METHYLTRANSFERASE                                        
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.R.SOTELO-MUNDO,L.CHANGCHIEN,F.MALEY,W.R.MONTFORT                    
REVDAT   9   30-OCT-24 1FFL    1       REMARK                                   
REVDAT   8   03-APR-24 1FFL    1       REMARK                                   
REVDAT   7   03-NOV-21 1FFL    1       SEQADV LINK                              
REVDAT   6   18-APR-18 1FFL    1       REMARK                                   
REVDAT   5   04-OCT-17 1FFL    1       REMARK                                   
REVDAT   4   13-JUL-11 1FFL    1       VERSN                                    
REVDAT   3   24-FEB-09 1FFL    1       VERSN                                    
REVDAT   2   25-APR-06 1FFL    1       JRNL                                     
REVDAT   1   28-JUL-00 1FFL    0                                                
JRNL        AUTH   R.R.SOTELO-MUNDO,L.CHANGCHIEN,F.MALEY,W.R.MONTFORT           
JRNL        TITL   CRYSTAL STRUCTURES OF THYMIDYLATE SYNTHASE MUTANT R166Q:     
JRNL        TITL 2 STRUCTURAL BASIS FOR THE NEARLY COMPLETE LOSS OF CATALYTIC   
JRNL        TITL 3 ACTIVITY.                                                    
JRNL        REF    J.BIOCHEM.MOL.TOXICOL.        V.  20    88 2006              
JRNL        REFN                   ISSN 1095-6670                               
JRNL        PMID   16615077                                                     
JRNL        DOI    10.1002/JBT.20122                                            
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   R.R.SOTELO-MUNDO                                             
REMARK   1  TITL   CRYSTALLOGRAPHIC STUDIES OF THYMIDYLATE SYNTHASE : STRUCTURE 
REMARK   1  TITL 2 OF A MAMMALIAN ENZYME AND ANALYSES OF INVARIANT              
REMARK   1  TITL 3 NON-CATALYTIC RESIDUES IN A BACTERIAL ENZYME.                
REMARK   1  REF    THESIS                                     1999              
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.94 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) : 2.94                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 33.13                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 3374507.520                    
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 97.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 8138                           
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) : 0.171                           
REMARK   3   FREE R VALUE                     : 0.220                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.700                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 868                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.007                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.94                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 3.12                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 93.30                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 1147                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2580                       
REMARK   3   BIN FREE R VALUE                    : 0.3110                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 10.70                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 137                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.027                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2151                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 10                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 0.00                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 39.50                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.00000                                              
REMARK   3    B22 (A**2) : 0.00000                                              
REMARK   3    B33 (A**2) : 0.00000                                              
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 COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.27                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.38                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.35                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.43                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.300                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 24.60                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.810                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : GROUP                                     
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 : FLAT MODEL                                           
REMARK   3   KSOL        : 0.31                                                 
REMARK   3   BSOL        : 28.17                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : CBX.PAR                                        
REMARK   3  PARAMETER FILE  3  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  3   : NULL                                           
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1FFL COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 27-JUL-00.                  
REMARK 100 THE DEPOSITION ID IS D_1000011543.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 04-MAY-97                          
REMARK 200  TEMPERATURE           (KELVIN) : 298                                
REMARK 200  PH                             : 8.1                                
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          : ENRAF-NONIUS FR571                 
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                  : DIFFRACTOMETER                     
REMARK 200  DETECTOR MANUFACTURER          : ENRAF-NONIUS FAST                  
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MADNESS                            
REMARK 200  DATA SCALING SOFTWARE          : CCP4 (AGROVATA, ROTAVATA           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 8138                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.940                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 35.335                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 96.1                               
REMARK 200  DATA REDUNDANCY                : 7.000                              
REMARK 200  R MERGE                    (I) : 0.09000                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 7.4000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.94                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.02                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 96.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 6.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.38000                            
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: FOURIER DIFFERENCE MAPS      
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: WILDTYPE BINARY COMPLEX OF E.COLI THYMIDYLATE        
REMARK 200  SYNTHASE                                                            
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 61.24                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.17                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM SULFATE, POTASSIUM PHOSPHATE,   
REMARK 280  EDTA, DTT, PH 8.1, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE       
REMARK 280  298K                                                                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 21 3                           
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290       5555   Z,X,Y                                                   
REMARK 290       6555   Z+1/2,-X+1/2,-Y                                         
REMARK 290       7555   -Z+1/2,-X,Y+1/2                                         
REMARK 290       8555   -Z,X+1/2,-Y+1/2                                         
REMARK 290       9555   Y,Z,X                                                   
REMARK 290      10555   -Y,Z+1/2,-X+1/2                                         
REMARK 290      11555   Y+1/2,-Z+1/2,-X                                         
REMARK 290      12555   -Y+1/2,-Z,X+1/2                                         
REMARK 290      13555   X+1/2,Y+1/2,Z+1/2                                       
REMARK 290      14555   -X,-Y+1/2,Z                                             
REMARK 290      15555   -X+1/2,Y,-Z                                             
REMARK 290      16555   X,-Y,-Z+1/2                                             
REMARK 290      17555   Z+1/2,X+1/2,Y+1/2                                       
REMARK 290      18555   Z,-X,-Y+1/2                                             
REMARK 290      19555   -Z,-X+1/2,Y                                             
REMARK 290      20555   -Z+1/2,X,-Y                                             
REMARK 290      21555   Y+1/2,Z+1/2,X+1/2                                       
REMARK 290      22555   -Y+1/2,Z,-X                                             
REMARK 290      23555   Y,-Z,-X+1/2                                             
REMARK 290      24555   -Y,-Z+1/2,X                                             
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       66.25000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY2   5  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY1   6  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY2   6 -1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY3   6  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY1   7  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY2   7 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY1   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY2   8  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY3   8  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY1   9  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   9  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY3   9  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY1  10  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2  10  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY3  10 -1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY1  11  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY2  11  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY3  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY1  12  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY2  12  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY3  12  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY1  13  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY2  13  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY3  13  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY1  14 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  14  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY3  14  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1  15 -1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY2  15  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  15  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1  16  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  16  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  16  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY1  17  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY2  17  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY3  17  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY1  18  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY2  18 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3  18  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY1  19  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY2  19 -1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY3  19  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY1  20  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY2  20  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3  20  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY1  21  0.000000  1.000000  0.000000       66.25000            
REMARK 290   SMTRY2  21  0.000000  0.000000  1.000000       66.25000            
REMARK 290   SMTRY3  21  1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY1  22  0.000000 -1.000000  0.000000       66.25000            
REMARK 290   SMTRY2  22  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY3  22 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY1  23  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2  23  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY3  23 -1.000000  0.000000  0.000000       66.25000            
REMARK 290   SMTRY1  24  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2  24  0.000000  0.000000 -1.000000       66.25000            
REMARK 290   SMTRY3  24  1.000000  0.000000  0.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: THE BIOLOGICAL ASSEMBLY IS A DIMER CONSTRUCTED FROM CHAIN A  
REMARK 300 A SYMMETRY PARTNER.                                                  
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,PQS                                              
REMARK 350 TOTAL BURIED SURFACE AREA: 4270 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 21200 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -20.0 KCAL/MOL                        
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 350   BIOMT1   2  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000       66.25000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375      HOH A 300  LIES ON A SPECIAL POSITION.                          
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    THR A  47       21.12    -64.70                                   
REMARK 500    LYS A  48      129.55    174.76                                   
REMARK 500    TYR A  94      -80.85    -14.15                                   
REMARK 500    ALA A 100       55.90   -152.51                                   
REMARK 500    ASP A 122       59.59   -160.29                                   
REMARK 500    ASN A 211       31.23    -90.01                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  1FFL A    1   264  UNP    P0A884   TYSY_ECOLI       1    264             
SEQADV 1FFL CXM A    1  UNP  P0A884    MET     1 MODIFIED RESIDUE               
SEQADV 1FFL GLN A  166  UNP  P0A884    ARG   166 ENGINEERED MUTATION            
SEQRES   1 A  264  CXM LYS GLN TYR LEU GLU LEU MET GLN LYS VAL LEU ASP          
SEQRES   2 A  264  GLU GLY THR GLN LYS ASN ASP ARG THR GLY THR GLY THR          
SEQRES   3 A  264  LEU SER ILE PHE GLY HIS GLN MET ARG PHE ASN LEU GLN          
SEQRES   4 A  264  ASP GLY PHE PRO LEU VAL THR THR LYS ARG CYS HIS LEU          
SEQRES   5 A  264  ARG SER ILE ILE HIS GLU LEU LEU TRP PHE LEU GLN GLY          
SEQRES   6 A  264  ASP THR ASN ILE ALA TYR LEU HIS GLU ASN ASN VAL THR          
SEQRES   7 A  264  ILE TRP ASP GLU TRP ALA ASP GLU ASN GLY ASP LEU GLY          
SEQRES   8 A  264  PRO VAL TYR GLY LYS GLN TRP ARG ALA TRP PRO THR PRO          
SEQRES   9 A  264  ASP GLY ARG HIS ILE ASP GLN ILE THR THR VAL LEU ASN          
SEQRES  10 A  264  GLN LEU LYS ASN ASP PRO ASP SER ARG ARG ILE ILE VAL          
SEQRES  11 A  264  SER ALA TRP ASN VAL GLY GLU LEU ASP LYS MET ALA LEU          
SEQRES  12 A  264  ALA PRO CYS HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP          
SEQRES  13 A  264  GLY LYS LEU SER CYS GLN LEU TYR GLN GLN SER CYS ASP          
SEQRES  14 A  264  VAL PHE LEU GLY LEU PRO PHE ASN ILE ALA SER TYR ALA          
SEQRES  15 A  264  LEU LEU VAL HIS MET MET ALA GLN GLN CYS ASP LEU GLU          
SEQRES  16 A  264  VAL GLY ASP PHE VAL TRP THR GLY GLY ASP THR HIS LEU          
SEQRES  17 A  264  TYR SER ASN HIS MET ASP GLN THR HIS LEU GLN LEU SER          
SEQRES  18 A  264  ARG GLU PRO ARG PRO LEU PRO LYS LEU ILE ILE LYS ARG          
SEQRES  19 A  264  LYS PRO GLU SER ILE PHE ASP TYR ARG PHE GLU ASP PHE          
SEQRES  20 A  264  GLU ILE GLU GLY TYR ASP PRO HIS PRO GLY ILE LYS ALA          
SEQRES  21 A  264  PRO VAL ALA ILE                                              
MODRES 1FFL CXM A    1  MET  N-CARBOXYMETHIONINE                                
HET    CXM  A   1      11                                                       
HETNAM     CXM N-CARBOXYMETHIONINE                                              
FORMUL   1  CXM    C6 H11 N O4 S                                                
FORMUL   2  HOH   *10(H2 O)                                                     
HELIX    1   1 LYS A    2  GLY A   15  1                                  14    
HELIX    2   2 GLN A   39  GLY A   41  5                                   3    
HELIX    3   3 HIS A   51  GLN A   64  1                                  14    
HELIX    4   4 ILE A   69  ASN A   75  1                                   7    
HELIX    5   5 VAL A   93  ALA A  100  1                                   8    
HELIX    6   6 ASP A  110  ASP A  122  1                                  13    
HELIX    7   7 ASN A  134  LEU A  138  5                                   5    
HELIX    8   8 LEU A  172  CYS A  192  1                                  21    
HELIX    9   9 HIS A  212  LEU A  220  1                                   9    
HELIX   10  10 ARG A  243  GLU A  245  5                                   3    
SHEET    1   A 6 THR A  16  ASN A  19  0                                        
SHEET    2   A 6 GLY A  25  ASN A  37 -1  N  THR A  26   O  LYS A  18           
SHEET    3   A 6 GLU A 195  TYR A 209 -1  N  PHE A 199   O  PHE A  36           
SHEET    4   A 6 LYS A 158  ASP A 169  1  O  LEU A 159   N  GLY A 197           
SHEET    5   A 6 HIS A 147  ALA A 155 -1  N  ALA A 148   O  TYR A 164           
SHEET    6   A 6 ILE A 129  SER A 131 -1  N  VAL A 130   O  PHE A 150           
SHEET    1   B 2 TRP A 101  PRO A 102  0                                        
SHEET    2   B 2 HIS A 108  ILE A 109 -1  N  ILE A 109   O  TRP A 101           
SHEET    1   C 2 LYS A 229  ILE A 232  0                                        
SHEET    2   C 2 PHE A 247  GLU A 250 -1  O  GLU A 248   N  ILE A 231           
LINK         C   CXM A   1                 N   LYS A   2     1555   1555  1.33  
CRYST1  132.500  132.500  132.500  90.00  90.00  90.00 I 21 3       24          
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      0.007547  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.007547  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.007547        0.00000                         
HETATM    1  N   CXM A   1     -12.588  -1.070  15.591  1.00 25.28           N  
HETATM    2  CA  CXM A   1     -11.877  -0.094  16.395  1.00 25.28           C  
HETATM    3  CB  CXM A   1     -12.799   1.074  16.739  1.00 32.68           C  
HETATM    4  CG  CXM A   1     -14.192   0.689  17.134  1.00 32.68           C  
HETATM    5  SD  CXM A   1     -15.303   2.048  16.780  1.00 32.68           S  
HETATM    6  CE  CXM A   1     -16.858   1.293  17.152  1.00 32.68           C  
HETATM    7  C   CXM A   1     -11.231  -0.651  17.646  1.00 25.28           C  
HETATM    8  O   CXM A   1     -11.619  -1.706  18.156  1.00 25.28           O  
HETATM    9  CN  CXM A   1     -12.482  -1.027  14.266  1.00 28.42           C  
HETATM   10  ON1 CXM A   1     -12.795  -2.004  13.608  1.00 28.42           O  
HETATM   11  ON2 CXM A   1     -12.540   0.077  13.758  1.00 28.42           O