HEADER    ISOMERASE                               08-OCT-01   1K4L              
TITLE     CRYSTAL STRUCTURE OF 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE IN 
TITLE    2 COMPLEX WITH TWO MANGANESE IONS                                      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE;             
COMPND   3 CHAIN: A;                                                            
COMPND   4 EC: 5.4.99.-;                                                        
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: MAGNAPORTHE GRISEA;                             
SOURCE   3 ORGANISM_TAXID: 148305;                                              
SOURCE   4 GENE: RICE BLAST FUNGI;                                              
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21(DE3);                                 
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PET-24A(+)                                
KEYWDS    DIHYDROXYBUTANONE PHOSPHATE SYNTHASE, RIBOFLAVIN BIOSYNTHESIS,        
KEYWDS   2 ANTIMICROBIAL TARGET, STRUCTURE-BASED DESIGN, ISOMERASE              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    D.-I.LIAO,Y.-J.ZHENG,P.V.VIITANEN,D.B.JORDAN                          
REVDAT   6   16-AUG-23 1K4L    1       REMARK LINK                              
REVDAT   5   04-APR-18 1K4L    1       REMARK                                   
REVDAT   4   13-JUL-11 1K4L    1       VERSN                                    
REVDAT   3   24-FEB-09 1K4L    1       VERSN                                    
REVDAT   2   01-APR-03 1K4L    1       JRNL                                     
REVDAT   1   06-MAR-02 1K4L    0                                                
JRNL        AUTH   D.I.LIAO,Y.J.ZHENG,P.V.VIITANEN,D.B.JORDAN                   
JRNL        TITL   STRUCTURAL DEFINITION OF THE ACTIVE SITE AND CATALYTIC       
JRNL        TITL 2 MECHANISM OF 3,4-DIHYDROXY-2-BUTANONE-4-PHOSPHATE SYNTHASE.  
JRNL        REF    BIOCHEMISTRY                  V.  41  1795 2002              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   11827524                                                     
JRNL        DOI    10.1021/BI015652U                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.60 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : TNT                                                  
REMARK   3   AUTHORS     : TRONRUD,TEN EYCK,MATTHEWS                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 15.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 25979                          
REMARK   3                                                                      
REMARK   3  USING DATA ABOVE SIGMA CUTOFF.                                      
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE     (WORKING + TEST SET) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.199                           
REMARK   3   FREE R VALUE                     : 0.267                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 2614                            
REMARK   3                                                                      
REMARK   3  USING ALL DATA, NO SIGMA CUTOFF.                                    
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : NULL                   
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE                  (NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 26412                  
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1631                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 12                                      
REMARK   3   SOLVENT ATOMS            : 209                                     
REMARK   3                                                                      
REMARK   3  WILSON B VALUE (FROM FCALC, A**2) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.    RMS    WEIGHT  COUNT           
REMARK   3   BOND LENGTHS                 (A) : 0.015 ; NULL  ; NULL            
REMARK   3   BOND ANGLES            (DEGREES) : 2.500 ; NULL  ; NULL            
REMARK   3   TORSION ANGLES         (DEGREES) : NULL  ; NULL  ; NULL            
REMARK   3   PSEUDOROTATION ANGLES  (DEGREES) : NULL  ; NULL  ; NULL            
REMARK   3   TRIGONAL CARBON PLANES       (A) : NULL  ; NULL  ; NULL            
REMARK   3   GENERAL PLANES               (A) : NULL  ; NULL  ; NULL            
REMARK   3   ISOTROPIC THERMAL FACTORS (A**2) : NULL  ; NULL  ; NULL            
REMARK   3   NON-BONDED CONTACTS          (A) : NULL  ; NULL  ; NULL            
REMARK   3                                                                      
REMARK   3  INCORRECT CHIRAL-CENTERS (COUNT) : 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  RESTRAINT LIBRARIES.                                                
REMARK   3   STEREOCHEMISTRY : NULL                                             
REMARK   3   ISOTROPIC THERMAL FACTOR RESTRAINTS : NULL                         
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1K4L COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-OCT-01.                  
REMARK 100 THE DEPOSITION ID IS D_1000014553.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 18-DEC-00                          
REMARK 200  TEMPERATURE           (KELVIN) : 105                                
REMARK 200  PH                             : 6.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU200                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.54                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : MSC FOCUSING MIRROR                
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   : 26458                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.600                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 94.3                               
REMARK 200  DATA REDUNDANCY                : 4.000                              
REMARK 200  R MERGE                    (I) : 0.06000                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 21.5000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.60                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.63                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 70.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.00                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.49000                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.000                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: TNT                                                   
REMARK 200 STARTING MODEL: 1K49 BUT WITH NO WATERS.                             
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 40.24                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.06                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: LI2SO4, MES-NAOH, PEG5000 MONOMETHYL     
REMARK 280  ETHER, PH 6.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 295K      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2                        
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z                                                 
REMARK 290       3555   -X+1/2,Y+1/2,-Z                                         
REMARK 290       4555   X+1/2,-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        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000       26.68300            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       44.17300            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       26.68300            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       44.17300            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        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 HOMODIMER. APPLYING THE         
REMARK 300 FOLLOWING SYMMETRY RELATED OPERATION ON THE COORDINATES OF THE       
REMARK 300 MONOMER IN THE ASYMMETRIC UNIT WOULD GENERATE THE 2ND HALF OF THE    
REMARK 300 DIMER. ROTATION MATRIX -1.00000 0.00000 0.00000 0.00000 -1.00000     
REMARK 300 0.00000 0.00000 0.00000 1.00000 TRANSLATION -1, -1, 0                
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: 5640 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 15980 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -114.0 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        0.00000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375      HOH A1169  LIES ON A SPECIAL POSITION.                          
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     MET A     1                                                      
REMARK 465     PRO A     2                                                      
REMARK 465     SER A     3                                                      
REMARK 465     THR A     4                                                      
REMARK 465     ASP A     5                                                      
REMARK 465     SER A     6                                                      
REMARK 465     ILE A     7                                                      
REMARK 465     PRO A     8                                                      
REMARK 465     LYS A     9                                                      
REMARK 465     SER A    10                                                      
REMARK 465     ASN A    11                                                      
REMARK 465     GLU A   228                                                      
REMARK 465     THR A   229                                                      
REMARK 465     ASN A   230                                                      
REMARK 465     GLY A   231                                                      
REMARK 465     SER A   232                                                      
REMARK 465     GLY A   233                                                      
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    HOH A  1025     O    HOH A  1095              2.18            
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  37   CD    GLU A  37   OE2     0.067                       
REMARK 500    GLU A  39   CD    GLU A  39   OE2     0.075                       
REMARK 500    GLU A 155   CD    GLU A 155   OE2     0.078                       
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    ASP A  33   CB  -  CG  -  OD1 ANGL. DEV. =   5.6 DEGREES          
REMARK 500    ASP A  41   CB  -  CG  -  OD2 ANGL. DEV. =  -6.0 DEGREES          
REMARK 500    ARG A  73   NE  -  CZ  -  NH1 ANGL. DEV. =   4.1 DEGREES          
REMARK 500    ARG A  73   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.0 DEGREES          
REMARK 500    ASP A  88   CB  -  CG  -  OD1 ANGL. DEV. =   5.5 DEGREES          
REMARK 500    ASP A  88   CB  -  CG  -  OD2 ANGL. DEV. =  -8.0 DEGREES          
REMARK 500    ARG A  90   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.1 DEGREES          
REMARK 500    TYR A  94   CB  -  CG  -  CD2 ANGL. DEV. =  -3.9 DEGREES          
REMARK 500    ASP A  99   CB  -  CG  -  OD2 ANGL. DEV. =  -6.1 DEGREES          
REMARK 500    ASP A 125   CB  -  CG  -  OD1 ANGL. DEV. =   6.3 DEGREES          
REMARK 500    ARG A 141   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.1 DEGREES          
REMARK 500    ARG A 151   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.7 DEGREES          
REMARK 500    ASP A 177   CB  -  CG  -  OD1 ANGL. DEV. =   5.8 DEGREES          
REMARK 500    ASP A 177   CB  -  CG  -  OD2 ANGL. DEV. =  -6.4 DEGREES          
REMARK 500    ASP A 178   CB  -  CG  -  OD2 ANGL. DEV. =  -5.5 DEGREES          
REMARK 500    ASP A 215   CB  -  CG  -  OD1 ANGL. DEV. =   5.8 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    ARG A  36     -112.00   -100.80                                   
REMARK 500    SER A  61     -169.56   -114.50                                   
REMARK 500    THR A 106      -94.80   -117.37                                   
REMARK 500    ARG A 151       49.92    -83.96                                   
REMARK 500    PRO A 168       45.02    -78.73                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MN A1003  MN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A  37   OE2                                                    
REMARK 620 2 HIS A 153   ND1 104.3                                              
REMARK 620 3 SO4 A1001   O2   93.2  88.0                                        
REMARK 620 4 HOH A1025   O   107.1 148.6  91.7                                  
REMARK 620 5 HOH A1028   O    90.1  83.1 171.1  95.2                            
REMARK 620 6 HOH A1040   O   167.7  87.1  91.7  61.5  86.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MN A1004  MN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A  37   OE1                                                    
REMARK 620 2 HOH A1025   O    96.0                                              
REMARK 620 3 HOH A1035   O    86.4  99.2                                        
REMARK 620 4 HOH A1084   O    99.0 162.8  90.1                                  
REMARK 620 5 HOH A1096   O   103.6  83.8 169.3  84.5                            
REMARK 620 6 HOH A1112   O   170.1  79.7  85.6  86.7  84.9                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 1001                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 1002                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MN A 1003                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MN A 1004                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1K49   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE   
REMARK 900 (CATION FREE FORM)                                                   
REMARK 900 RELATED ID: 1K4I   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF 3,4-DIHYDROXY-2-BUTANONE 4-PHOSPHATE SYNTHASE   
REMARK 900 IN COMPLEX WITH TWO MAGNESIUM IONS                                   
DBREF  1K4L A    1   233  UNP    Q8TG90   Q8TG90_MAGGR     1    233             
SEQRES   1 A  233  MET PRO SER THR ASP SER ILE PRO LYS SER ASN PHE ASP          
SEQRES   2 A  233  ALA ILE PRO ASP VAL ILE GLN ALA PHE LYS ASN GLY GLU          
SEQRES   3 A  233  PHE VAL VAL VAL LEU ASP ASP PRO SER ARG GLU ASN GLU          
SEQRES   4 A  233  ALA ASP LEU ILE ILE ALA ALA GLU SER VAL THR THR GLU          
SEQRES   5 A  233  GLN MET ALA PHE MET VAL ARG HIS SER SER GLY LEU ILE          
SEQRES   6 A  233  CYS ALA PRO LEU THR PRO GLU ARG THR THR ALA LEU ASP          
SEQRES   7 A  233  LEU PRO GLN MET VAL THR HIS ASN ALA ASP PRO ARG GLY          
SEQRES   8 A  233  THR ALA TYR THR VAL SER VAL ASP ALA GLU HIS PRO SER          
SEQRES   9 A  233  THR THR THR GLY ILE SER ALA HIS ASP ARG ALA LEU ALA          
SEQRES  10 A  233  CYS ARG MET LEU ALA ALA PRO ASP ALA GLN PRO SER HIS          
SEQRES  11 A  233  PHE ARG ARG PRO GLY HIS VAL PHE PRO LEU ARG ALA VAL          
SEQRES  12 A  233  ALA GLY GLY VAL ARG ALA ARG ARG GLY HIS THR GLU ALA          
SEQRES  13 A  233  GLY VAL GLU LEU CYS ARG LEU ALA GLY LYS ARG PRO VAL          
SEQRES  14 A  233  ALA VAL ILE SER GLU ILE VAL ASP ASP GLY GLN GLU VAL          
SEQRES  15 A  233  GLU GLY ARG ALA VAL ARG ALA ALA PRO GLY MET LEU ARG          
SEQRES  16 A  233  GLY ASP GLU CYS VAL ALA PHE ALA ARG ARG TRP GLY LEU          
SEQRES  17 A  233  LYS VAL CYS THR ILE GLU ASP MET ILE ALA HIS VAL GLU          
SEQRES  18 A  233  LYS THR GLU GLY LYS LEU GLU THR ASN GLY SER GLY              
HET    SO4  A1001       5                                                       
HET    SO4  A1002       5                                                       
HET     MN  A1003       1                                                       
HET     MN  A1004       1                                                       
HETNAM     SO4 SULFATE ION                                                      
HETNAM      MN MANGANESE (II) ION                                               
FORMUL   2  SO4    2(O4 S 2-)                                                   
FORMUL   4   MN    2(MN 2+)                                                     
FORMUL   6  HOH   *209(H2 O)                                                    
HELIX    1   1 ALA A   14  ASN A   24  1                                  11    
HELIX    2   2 GLU A   47  VAL A   49  5                                   3    
HELIX    3   3 THR A   50  SER A   61  1                                  12    
HELIX    4   4 THR A   70  LEU A   77  1                                   8    
HELIX    5   5 SER A  110  ALA A  123  1                                  14    
HELIX    6   6 GLN A  127  SER A  129  5                                   3    
HELIX    7   7 GLY A  145  ARG A  150  1                                   6    
HELIX    8   8 GLY A  152  ALA A  164  1                                  13    
HELIX    9   9 GLY A  196  TRP A  206  1                                  11    
HELIX   10  10 ILE A  213  GLY A  225  1                                  13    
SHEET    1   A 4 ALA A 170  GLU A 174  0                                        
SHEET    2   A 4 ALA A  40  ALA A  45 -1  N  ILE A  44   O  VAL A 171           
SHEET    3   A 4 VAL A  28  LEU A  31 -1  N  VAL A  30   O  ASP A  41           
SHEET    4   A 4 LYS A 209  THR A 212  1  O  CYS A 211   N  LEU A  31           
SHEET    1   B 3 CYS A  66  LEU A  69  0                                        
SHEET    2   B 3 PHE A 131  ARG A 141  1  O  LEU A 140   N  LEU A  69           
SHEET    3   B 3 VAL A  98  ALA A 100 -1  N  ASP A  99   O  ARG A 132           
SHEET    1   C 2 VAL A 176  ASP A 177  0                                        
SHEET    2   C 2 GLY A 192  MET A 193 -1  O  GLY A 192   N  ASP A 177           
SHEET    1   D 2 GLN A 180  GLU A 181  0                                        
SHEET    2   D 2 ARG A 188  ALA A 189 -1  O  ALA A 189   N  GLN A 180           
LINK         OE2 GLU A  37                MN    MN A1003     1555   1555  1.88  
LINK         OE1 GLU A  37                MN    MN A1004     1555   1555  2.03  
LINK         ND1 HIS A 153                MN    MN A1003     1555   1555  2.32  
LINK         O2  SO4 A1001                MN    MN A1003     1555   1555  2.23  
LINK        MN    MN A1003                 O   HOH A1025     1555   1555  2.07  
LINK        MN    MN A1003                 O   HOH A1028     1555   1555  2.25  
LINK        MN    MN A1003                 O   HOH A1040     1555   1555  2.23  
LINK        MN    MN A1004                 O   HOH A1025     1555   1555  2.19  
LINK        MN    MN A1004                 O   HOH A1035     1555   1555  2.43  
LINK        MN    MN A1004                 O   HOH A1084     1555   2555  2.28  
LINK        MN    MN A1004                 O   HOH A1096     1555   1555  2.34  
LINK        MN    MN A1004                 O   HOH A1112     1555   1555  2.56  
CISPEP   1 ARG A  133    PRO A  134          0         2.10                     
SITE     1 AC1  9 ARG A  36  GLU A  37  ARG A 150  GLY A 152                    
SITE     2 AC1  9 HIS A 153  THR A 154   MN A1003  HOH A1025                    
SITE     3 AC1  9 HOH A1096                                                     
SITE     1 AC2  6 GLN A  81  ARG A 141  ARG A 205  HOH A1082                    
SITE     2 AC2  6 HOH A1115  HOH A1188                                          
SITE     1 AC3  7 GLU A  37  HIS A 153  SO4 A1001   MN A1004                    
SITE     2 AC3  7 HOH A1025  HOH A1028  HOH A1040                               
SITE     1 AC4  7 GLU A  37   MN A1003  HOH A1025  HOH A1035                    
SITE     2 AC4  7 HOH A1084  HOH A1096  HOH A1112                               
CRYST1   53.366   88.346   43.747  90.00  90.00  90.00 P 21 21 2     4          
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      0.018739  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.011319  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.022859        0.00000