HEADER    LYASE                                   03-DEC-04   1Y60              
TITLE     STRUCTURE OF THE TETRAHYDROMETHANOPTERIN DEPENDENT FORMALDEHYDE-      
TITLE    2 ACTIVATING ENZYME (FAE) FROM METHYLOBACTERIUM EXTORQUENS AM1 WITH    
TITLE    3 BOUND 5,10-METHYLENE TETRAHYDROMETHANOPTERIN                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: FORMALDEHYDE-ACTIVATING ENZYME FAE;                        
COMPND   3 CHAIN: A, B, C, D, E;                                                
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 OTHER_DETAILS: COMPLEXED WITH PTERIN-RELATED COFACTOR                
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: METHYLOBACTERIUM EXTORQUENS;                    
SOURCE   3 ORGANISM_TAXID: 272630;                                              
SOURCE   4 STRAIN: AM1;                                                         
SOURCE   5 GENE: FAE;                                                           
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)PLYSS;                            
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET17B                                    
KEYWDS    PENTAMER; BETA-ALPHA-BETA LEFT HANDED CROSSOVER;                      
KEYWDS   2 TETRAHYDROMETHANOPTERIN-BINDING, LYASE                               
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    P.ACHARYA,M.GOENRICH,C.H.HAGEMEIER,U.DEMMER,J.A.VORHOLT,R.K.THAUER,   
AUTHOR   2 U.ERMLER                                                             
REVDAT   5   23-AUG-23 1Y60    1       REMARK                                   
REVDAT   4   13-JUL-11 1Y60    1       VERSN                                    
REVDAT   3   24-FEB-09 1Y60    1       VERSN                                    
REVDAT   2   26-APR-05 1Y60    1       JRNL                                     
REVDAT   1   11-JAN-05 1Y60    0                                                
JRNL        AUTH   P.ACHARYA,M.GOENRICH,C.H.HAGEMEIER,U.DEMMER,J.A.VORHOLT,     
JRNL        AUTH 2 R.K.THAUER,U.ERMLER                                          
JRNL        TITL   HOW AN ENZYME BINDS THE C1-CARRIER TETRAHYDROMETHANOPTERIN:  
JRNL        TITL 2 STRUCTURE OF THE TETRAHYDROMETHANOPTERIN DEPENDENT           
JRNL        TITL 3 FORMALDEHYDE-ACTIVATING ENZYME (FAE) FROM METHYLOBACTERIUM   
JRNL        TITL 4 EXTORQUENS AM1                                               
JRNL        REF    J.BIOL.CHEM.                  V. 280 13712 2005              
JRNL        REFN                   ISSN 0021-9258                               
JRNL        PMID   15632161                                                     
JRNL        DOI    10.1074/JBC.M412320200                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.1                                              
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) : 1.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 44.82                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 108436.210                     
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 96.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 57191                          
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) : 0.209                           
REMARK   3   FREE R VALUE                     : 0.241                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2967                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.004                           
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) : 1.90                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.02                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 83.70                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 8083                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3910                       
REMARK   3   BIN FREE R VALUE                    : 0.3870                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 5.00                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 424                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.019                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 6293                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 225                                     
REMARK   3   SOLVENT ATOMS            : 492                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 20.90                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 29.00                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 18.76000                                             
REMARK   3    B22 (A**2) : -9.77000                                             
REMARK   3    B33 (A**2) : -8.99000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 6.46000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.25                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.45                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 50.0                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.29                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.46                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.011                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.600                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.00                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.070                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 2.320 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 2.970 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 3.530 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 4.660 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.39                                                 
REMARK   3   BSOL        : 53.50                                                
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  : DNA-RNA_REP.PARAM                              
REMARK   3  PARAMETER FILE  3  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  4  : ION.PARAM                                      
REMARK   3  PARAMETER FILE  5  : H4M.PAR                                        
REMARK   3  PARAMETER FILE  6  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : DNA-RNA.TOP                                    
REMARK   3  TOPOLOGY FILE  3   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  4   : ION.TOP                                        
REMARK   3  TOPOLOGY FILE  5   : H4M.TOP                                        
REMARK   3  TOPOLOGY FILE  6   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1Y60 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-DEC-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000031159.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 07-DEC-03                          
REMARK 200  TEMPERATURE           (KELVIN) : 77                                 
REMARK 200  PH                             : 7.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ESRF                               
REMARK 200  BEAMLINE                       : ID14-4                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.939270                           
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4R                    
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO, XDS                         
REMARK 200  DATA SCALING SOFTWARE          : XDS                                
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 57191                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.900                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 44.820                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 93.5                               
REMARK 200  DATA REDUNDANCY                : 3.700                              
REMARK 200  R MERGE                    (I) : 0.14400                            
REMARK 200  R SYM                      (I) : 0.08200                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 12.1500                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.01                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 76.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.20                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.50000                            
REMARK 200  R SYM FOR SHELL            (I) : 0.40000                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.030                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: EPMR                                                  
REMARK 200 STARTING MODEL: FORMALDEHYDE-ACTIVATING ENZYME FROM                  
REMARK 200  METHYLOBACTERIUM EXTORQUENS AM1 PDB ID 1Y5Y                         
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 38.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.00                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1 M HEPES/NAOH PH 7.5, 20% (W/V)       
REMARK 280  POLYETHYLENEGLYCOL 10,000, 5 MM TETRAHYDROMETHANOPTERIN (H4MPT),    
REMARK 280  VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 281.0K                   
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       56.29500            
REMARK 290   SMTRY3   2  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 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: PENTAMERIC                        
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: PENTAMERIC                 
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 24880 ANGSTROM**2                         
REMARK 350 SURFACE AREA OF THE COMPLEX: 24710 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -137.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E                         
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     ALA A   170                                                      
REMARK 465     ALA B  1170                                                      
REMARK 465     ALA C  2170                                                      
REMARK 465     ALA E  4170                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     ASN B1169    CG   OD1  ND2                                       
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   NZ   LYS A   160     O    HOH A   344              2.14            
REMARK 500   O    ALA C  2002     OE2  GLU C  2108              2.16            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   NZ   LYS B  1139     O    HOH E   421     2545     2.17            
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    GLU C2011   CA  -  CB  -  CG  ANGL. DEV. =  13.3 DEGREES          
REMARK 500    PRO D3165   C   -  N   -  CA  ANGL. DEV. =   9.1 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ALA A  12      143.03   -170.92                                   
REMARK 500    ALA A 125      -35.07   -138.30                                   
REMARK 500    ALA A 167      -70.97   -119.71                                   
REMARK 500    ALA A 168      132.33     68.80                                   
REMARK 500    LYS B1003      -71.72    120.33                                   
REMARK 500    ALA B1012      142.57   -171.58                                   
REMARK 500    ALA B1125      -35.77   -139.68                                   
REMARK 500    LYS C2003      -49.00     98.65                                   
REMARK 500    ALA C2125      -35.33   -137.83                                   
REMARK 500    LYS D3003      -71.49     97.67                                   
REMARK 500    ALA D3125      -34.14   -141.01                                   
REMARK 500    ALA E4012      141.55   -170.50                                   
REMARK 500    ALA E4125      -32.69   -139.45                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 610                                                                      
REMARK 610 MISSING HETEROATOM                                                   
REMARK 610 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 610 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 610 I=INSERTION CODE):                                                   
REMARK 610   M RES C SSEQI                                                      
REMARK 610     H4M B  997                                                       
REMARK 610     H4M B  998                                                       
REMARK 610     H4M C  995                                                       
REMARK 610     H4M D  994                                                       
REMARK 610     H4M E  996                                                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4M D 994                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4M C 995                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4M E 996                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4M B 997                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H4M B 998                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1Y5Y   RELATED DB: PDB                                   
REMARK 900 THE SAME PROTEIN, APO FORM                                           
DBREF  1Y60 A    2   170  UNP    Q9FA38   FAE_METEX        1    169             
DBREF  1Y60 B 1002  1170  UNP    Q9FA38   FAE_METEX        1    169             
DBREF  1Y60 C 2002  2170  UNP    Q9FA38   FAE_METEX        1    169             
DBREF  1Y60 D 3002  3170  UNP    Q9FA38   FAE_METEX        1    169             
DBREF  1Y60 E 4002  4170  UNP    Q9FA38   FAE_METEX        1    169             
SEQRES   1 A  169  ALA LYS ILE THR LYS VAL GLN VAL GLY GLU ALA LEU VAL          
SEQRES   2 A  169  GLY ASP GLY ASN GLU VAL ALA HIS ILE ASP LEU ILE ILE          
SEQRES   3 A  169  GLY PRO ARG GLY SER PRO ALA GLU THR ALA PHE CYS ASN          
SEQRES   4 A  169  GLY LEU VAL ASN ASN LYS HIS GLY PHE THR SER LEU LEU          
SEQRES   5 A  169  ALA VAL ILE ALA PRO ASN LEU PRO CYS LYS PRO ASN THR          
SEQRES   6 A  169  LEU MET PHE ASN LYS VAL THR ILE ASN ASP ALA ARG GLN          
SEQRES   7 A  169  ALA VAL GLN MET PHE GLY PRO ALA GLN HIS GLY VAL ALA          
SEQRES   8 A  169  MET ALA VAL GLN ASP ALA VAL ALA GLU GLY ILE ILE PRO          
SEQRES   9 A  169  ALA ASP GLU ALA ASP ASP LEU TYR VAL LEU VAL GLY VAL          
SEQRES  10 A  169  PHE ILE HIS TRP GLU ALA ALA ASP ASP ALA LYS ILE GLN          
SEQRES  11 A  169  LYS TYR ASN TYR GLU ALA THR LYS LEU SER ILE GLN ARG          
SEQRES  12 A  169  ALA VAL ASN GLY GLU PRO LYS ALA SER VAL VAL THR GLU          
SEQRES  13 A  169  GLN ARG LYS SER ALA THR HIS PRO PHE ALA ALA ASN ALA          
SEQRES   1 B  169  ALA LYS ILE THR LYS VAL GLN VAL GLY GLU ALA LEU VAL          
SEQRES   2 B  169  GLY ASP GLY ASN GLU VAL ALA HIS ILE ASP LEU ILE ILE          
SEQRES   3 B  169  GLY PRO ARG GLY SER PRO ALA GLU THR ALA PHE CYS ASN          
SEQRES   4 B  169  GLY LEU VAL ASN ASN LYS HIS GLY PHE THR SER LEU LEU          
SEQRES   5 B  169  ALA VAL ILE ALA PRO ASN LEU PRO CYS LYS PRO ASN THR          
SEQRES   6 B  169  LEU MET PHE ASN LYS VAL THR ILE ASN ASP ALA ARG GLN          
SEQRES   7 B  169  ALA VAL GLN MET PHE GLY PRO ALA GLN HIS GLY VAL ALA          
SEQRES   8 B  169  MET ALA VAL GLN ASP ALA VAL ALA GLU GLY ILE ILE PRO          
SEQRES   9 B  169  ALA ASP GLU ALA ASP ASP LEU TYR VAL LEU VAL GLY VAL          
SEQRES  10 B  169  PHE ILE HIS TRP GLU ALA ALA ASP ASP ALA LYS ILE GLN          
SEQRES  11 B  169  LYS TYR ASN TYR GLU ALA THR LYS LEU SER ILE GLN ARG          
SEQRES  12 B  169  ALA VAL ASN GLY GLU PRO LYS ALA SER VAL VAL THR GLU          
SEQRES  13 B  169  GLN ARG LYS SER ALA THR HIS PRO PHE ALA ALA ASN ALA          
SEQRES   1 C  169  ALA LYS ILE THR LYS VAL GLN VAL GLY GLU ALA LEU VAL          
SEQRES   2 C  169  GLY ASP GLY ASN GLU VAL ALA HIS ILE ASP LEU ILE ILE          
SEQRES   3 C  169  GLY PRO ARG GLY SER PRO ALA GLU THR ALA PHE CYS ASN          
SEQRES   4 C  169  GLY LEU VAL ASN ASN LYS HIS GLY PHE THR SER LEU LEU          
SEQRES   5 C  169  ALA VAL ILE ALA PRO ASN LEU PRO CYS LYS PRO ASN THR          
SEQRES   6 C  169  LEU MET PHE ASN LYS VAL THR ILE ASN ASP ALA ARG GLN          
SEQRES   7 C  169  ALA VAL GLN MET PHE GLY PRO ALA GLN HIS GLY VAL ALA          
SEQRES   8 C  169  MET ALA VAL GLN ASP ALA VAL ALA GLU GLY ILE ILE PRO          
SEQRES   9 C  169  ALA ASP GLU ALA ASP ASP LEU TYR VAL LEU VAL GLY VAL          
SEQRES  10 C  169  PHE ILE HIS TRP GLU ALA ALA ASP ASP ALA LYS ILE GLN          
SEQRES  11 C  169  LYS TYR ASN TYR GLU ALA THR LYS LEU SER ILE GLN ARG          
SEQRES  12 C  169  ALA VAL ASN GLY GLU PRO LYS ALA SER VAL VAL THR GLU          
SEQRES  13 C  169  GLN ARG LYS SER ALA THR HIS PRO PHE ALA ALA ASN ALA          
SEQRES   1 D  169  ALA LYS ILE THR LYS VAL GLN VAL GLY GLU ALA LEU VAL          
SEQRES   2 D  169  GLY ASP GLY ASN GLU VAL ALA HIS ILE ASP LEU ILE ILE          
SEQRES   3 D  169  GLY PRO ARG GLY SER PRO ALA GLU THR ALA PHE CYS ASN          
SEQRES   4 D  169  GLY LEU VAL ASN ASN LYS HIS GLY PHE THR SER LEU LEU          
SEQRES   5 D  169  ALA VAL ILE ALA PRO ASN LEU PRO CYS LYS PRO ASN THR          
SEQRES   6 D  169  LEU MET PHE ASN LYS VAL THR ILE ASN ASP ALA ARG GLN          
SEQRES   7 D  169  ALA VAL GLN MET PHE GLY PRO ALA GLN HIS GLY VAL ALA          
SEQRES   8 D  169  MET ALA VAL GLN ASP ALA VAL ALA GLU GLY ILE ILE PRO          
SEQRES   9 D  169  ALA ASP GLU ALA ASP ASP LEU TYR VAL LEU VAL GLY VAL          
SEQRES  10 D  169  PHE ILE HIS TRP GLU ALA ALA ASP ASP ALA LYS ILE GLN          
SEQRES  11 D  169  LYS TYR ASN TYR GLU ALA THR LYS LEU SER ILE GLN ARG          
SEQRES  12 D  169  ALA VAL ASN GLY GLU PRO LYS ALA SER VAL VAL THR GLU          
SEQRES  13 D  169  GLN ARG LYS SER ALA THR HIS PRO PHE ALA ALA ASN ALA          
SEQRES   1 E  169  ALA LYS ILE THR LYS VAL GLN VAL GLY GLU ALA LEU VAL          
SEQRES   2 E  169  GLY ASP GLY ASN GLU VAL ALA HIS ILE ASP LEU ILE ILE          
SEQRES   3 E  169  GLY PRO ARG GLY SER PRO ALA GLU THR ALA PHE CYS ASN          
SEQRES   4 E  169  GLY LEU VAL ASN ASN LYS HIS GLY PHE THR SER LEU LEU          
SEQRES   5 E  169  ALA VAL ILE ALA PRO ASN LEU PRO CYS LYS PRO ASN THR          
SEQRES   6 E  169  LEU MET PHE ASN LYS VAL THR ILE ASN ASP ALA ARG GLN          
SEQRES   7 E  169  ALA VAL GLN MET PHE GLY PRO ALA GLN HIS GLY VAL ALA          
SEQRES   8 E  169  MET ALA VAL GLN ASP ALA VAL ALA GLU GLY ILE ILE PRO          
SEQRES   9 E  169  ALA ASP GLU ALA ASP ASP LEU TYR VAL LEU VAL GLY VAL          
SEQRES  10 E  169  PHE ILE HIS TRP GLU ALA ALA ASP ASP ALA LYS ILE GLN          
SEQRES  11 E  169  LYS TYR ASN TYR GLU ALA THR LYS LEU SER ILE GLN ARG          
SEQRES  12 E  169  ALA VAL ASN GLY GLU PRO LYS ALA SER VAL VAL THR GLU          
SEQRES  13 E  169  GLN ARG LYS SER ALA THR HIS PRO PHE ALA ALA ASN ALA          
HET    H4M  B 997      45                                                       
HET    H4M  B 998      45                                                       
HET    H4M  C 995      45                                                       
HET    H4M  D 994      45                                                       
HET    H4M  E 996      45                                                       
HETNAM     H4M 5,10-DIMETHYLENE TETRAHYDROMETHANOPTERIN                         
FORMUL   6  H4M    5(C31 H45 N6 O16 P)                                          
FORMUL  11  HOH   *492(H2 O)                                                    
HELIX    1   1 ASP A   16  VAL A   20  5                                   5    
HELIX    2   2 SER A   32  ASN A   44  1                                  13    
HELIX    3   3 ASP A   76  PHE A   84  1                                   9    
HELIX    4   4 GLY A   85  GLU A  101  1                                  17    
HELIX    5   5 GLU A  108  ASP A  110  5                                   3    
HELIX    6   6 ASP A  126  ASN A  147  1                                  22    
HELIX    7   7 LYS A  151  ARG A  159  1                                   9    
HELIX    8   8 LYS A  160  ALA A  162  5                                   3    
HELIX    9   9 ASP B 1016  VAL B 1020  5                                   5    
HELIX   10  10 SER B 1032  ASN B 1044  1                                  13    
HELIX   11  11 ASP B 1076  PHE B 1084  1                                   9    
HELIX   12  12 GLY B 1085  GLU B 1101  1                                  17    
HELIX   13  13 GLU B 1108  ASP B 1110  5                                   3    
HELIX   14  14 ASP B 1126  ASN B 1147  1                                  22    
HELIX   15  15 LYS B 1151  ARG B 1159  1                                   9    
HELIX   16  16 LYS B 1160  ALA B 1162  5                                   3    
HELIX   17  17 ASP C 2016  VAL C 2020  5                                   5    
HELIX   18  18 SER C 2032  ASN C 2044  1                                  13    
HELIX   19  19 ASP C 2076  PHE C 2084  1                                   9    
HELIX   20  20 GLY C 2085  GLU C 2101  1                                  17    
HELIX   21  21 GLU C 2108  ASP C 2110  5                                   3    
HELIX   22  22 ASP C 2126  ASN C 2147  1                                  22    
HELIX   23  23 LYS C 2151  ARG C 2159  1                                   9    
HELIX   24  24 LYS C 2160  ALA C 2162  5                                   3    
HELIX   25  25 ASP D 3016  VAL D 3020  5                                   5    
HELIX   26  26 SER D 3032  ASN D 3044  1                                  13    
HELIX   27  27 ASP D 3076  PHE D 3084  1                                   9    
HELIX   28  28 GLY D 3085  GLU D 3101  1                                  17    
HELIX   29  29 GLU D 3108  ASP D 3110  5                                   3    
HELIX   30  30 ASP D 3126  ASN D 3147  1                                  22    
HELIX   31  31 LYS D 3151  ARG D 3159  1                                   9    
HELIX   32  32 LYS D 3160  ALA D 3162  5                                   3    
HELIX   33  33 ASP E 4016  VAL E 4020  5                                   5    
HELIX   34  34 SER E 4032  ASN E 4044  1                                  13    
HELIX   35  35 ASP E 4076  PHE E 4084  1                                   9    
HELIX   36  36 GLY E 4085  GLU E 4101  1                                  17    
HELIX   37  37 GLU E 4108  ASP E 4110  5                                   3    
HELIX   38  38 ASP E 4126  ASN E 4147  1                                  22    
HELIX   39  39 LYS E 4151  ARG E 4159  1                                   9    
HELIX   40  40 LYS E 4160  ALA E 4162  5                                   3    
SHEET    1   A 5 GLN A   8  VAL A  14  0                                        
SHEET    2   A 5 ALA A  21  PRO A  29 -1  O  LEU A  25   N  GLY A  10           
SHEET    3   A 5 LEU A 112  VAL A 118 -1  O  LEU A 115   N  ILE A  26           
SHEET    4   A 5 ASN A  65  ASN A  70  1  N  LEU A  67   O  VAL A 116           
SHEET    5   A 5 LEU A  52  LEU A  53 -1  N  LEU A  52   O  MET A  68           
SHEET    1   B 2 VAL A  55  ALA A  57  0                                        
SHEET    2   B 2 LEU A  60  PRO A  61 -1  O  LEU A  60   N  ALA A  57           
SHEET    1   C 5 GLN B1008  VAL B1014  0                                        
SHEET    2   C 5 ALA B1021  PRO B1029 -1  O  LEU B1025   N  GLY B1010           
SHEET    3   C 5 LEU B1112  VAL B1118 -1  O  GLY B1117   N  ASP B1024           
SHEET    4   C 5 ASN B1065  ASN B1070  1  N  LEU B1067   O  VAL B1116           
SHEET    5   C 5 LEU B1052  LEU B1053 -1  N  LEU B1052   O  MET B1068           
SHEET    1   D 2 VAL B1055  ALA B1057  0                                        
SHEET    2   D 2 LEU B1060  PRO B1061 -1  O  LEU B1060   N  ALA B1057           
SHEET    1   E 5 GLN C2008  VAL C2014  0                                        
SHEET    2   E 5 ALA C2021  PRO C2029 -1  O  LEU C2025   N  GLY C2010           
SHEET    3   E 5 LEU C2112  VAL C2118 -1  O  GLY C2117   N  ASP C2024           
SHEET    4   E 5 ASN C2065  ASN C2070  1  N  LEU C2067   O  VAL C2116           
SHEET    5   E 5 LEU C2052  LEU C2053 -1  N  LEU C2052   O  MET C2068           
SHEET    1   F 2 VAL C2055  ALA C2057  0                                        
SHEET    2   F 2 LEU C2060  PRO C2061 -1  O  LEU C2060   N  ALA C2057           
SHEET    1   G 5 GLN D3008  VAL D3014  0                                        
SHEET    2   G 5 ALA D3021  PRO D3029 -1  O  LEU D3025   N  GLY D3010           
SHEET    3   G 5 LEU D3112  VAL D3118 -1  O  LEU D3115   N  ILE D3026           
SHEET    4   G 5 ASN D3065  ASN D3070  1  N  LEU D3067   O  VAL D3116           
SHEET    5   G 5 LEU D3052  LEU D3053 -1  N  LEU D3052   O  MET D3068           
SHEET    1   H 2 VAL D3055  ALA D3057  0                                        
SHEET    2   H 2 LEU D3060  PRO D3061 -1  O  LEU D3060   N  ALA D3057           
SHEET    1   I 5 GLN E4008  VAL E4014  0                                        
SHEET    2   I 5 ALA E4021  PRO E4029 -1  O  LEU E4025   N  GLY E4010           
SHEET    3   I 5 LEU E4112  VAL E4118 -1  O  GLY E4117   N  ASP E4024           
SHEET    4   I 5 ASN E4065  ASN E4070  1  N  LEU E4067   O  VAL E4116           
SHEET    5   I 5 LEU E4052  LEU E4053 -1  N  LEU E4052   O  MET E4068           
SHEET    1   J 2 VAL E4055  ALA E4057  0                                        
SHEET    2   J 2 LEU E4060  PRO E4061 -1  O  LEU E4060   N  ALA E4057           
CISPEP   1 LYS A   63    PRO A   64          0         0.88                     
CISPEP   2 GLU A  149    PRO A  150          0        -0.03                     
CISPEP   3 LYS B 1063    PRO B 1064          0         0.83                     
CISPEP   4 GLU B 1149    PRO B 1150          0        -0.19                     
CISPEP   5 LYS C 2063    PRO C 2064          0         0.82                     
CISPEP   6 GLU C 2149    PRO C 2150          0         0.04                     
CISPEP   7 LYS D 3063    PRO D 3064          0         0.80                     
CISPEP   8 GLU D 3149    PRO D 3150          0        -0.10                     
CISPEP   9 LYS E 4063    PRO E 4064          0         0.90                     
CISPEP  10 GLU E 4149    PRO E 4150          0        -0.17                     
SITE     1 AC1 17 HOH D 224  HOH D 843  HIS D3022  ASP D3024                    
SITE     2 AC1 17 LYS D3071  VAL D3072  THR D3073  ASN D3075                    
SITE     3 AC1 17 PHE D3119  HOH E 810  LEU E4052  LEU E4053                    
SITE     4 AC1 17 ASP E4076  ALA E4077  ALA E4080  PHE E4084                    
SITE     5 AC1 17 GLN E4088                                                     
SITE     1 AC2 18 HOH C 483  HIS C2022  ASP C2024  LYS C2071                    
SITE     2 AC2 18 VAL C2072  THR C2073  PHE C2119  PHE C2166                    
SITE     3 AC2 18 HIS D3047  GLY D3048  THR D3050  LEU D3052                    
SITE     4 AC2 18 LEU D3053  ASN D3075  ASP D3076  ALA D3077                    
SITE     5 AC2 18 PHE D3084  GLN D3088                                          
SITE     1 AC3 15 THR A  50  LEU A  52  LEU A  53  ASP A  76                    
SITE     2 AC3 15 ALA A  77  PHE A  84  GLN A  88  HOH A 855                    
SITE     3 AC3 15 HOH E 260  HIS E4022  ASP E4024  LYS E4071                    
SITE     4 AC3 15 VAL E4072  THR E4073  PHE E4119                               
SITE     1 AC4 17 HOH B 812  HOH B 815  HIS B1022  ASP B1024                    
SITE     2 AC4 17 LYS B1071  VAL B1072  THR B1073  THR C2050                    
SITE     3 AC4 17 LEU C2052  LEU C2053  ILE C2074  ASN C2075                    
SITE     4 AC4 17 ASP C2076  ALA C2077  ALA C2080  PHE C2084                    
SITE     5 AC4 17 GLN C2088                                                     
SITE     1 AC5 18 HIS A  22  ASP A  24  LYS A  71  VAL A  72                    
SITE     2 AC5 18 THR A  73  PHE A 119  HOH A 388  HOH B 814                    
SITE     3 AC5 18 THR B1050  LEU B1052  LEU B1053  VAL B1055                    
SITE     4 AC5 18 ILE B1074  ASN B1075  ASP B1076  ALA B1077                    
SITE     5 AC5 18 PHE B1084  GLN B1088                                          
CRYST1   48.860  112.590   72.010  90.00  91.00  90.00 P 1 21 1     10          
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      0.020467  0.000000  0.000357        0.00000                         
SCALE2      0.000000  0.008882  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.013889        0.00000