PDB Short entry for 4K55
HEADER    SIGNALING PROTEIN                       13-APR-13   4K55              
TITLE     STRUCTURE OF THE EXTRACELLULAR DOMAIN OF BUTYROPHILIN BTN3A1 IN       
TITLE    2 COMPLEX WITH (E)-4-HYDROXY-3-METHYL-BUT-2-ENYL PYROPHOSPHATE (HMBPP) 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: BUTYROPHILIN SUBFAMILY 3 MEMBER A1;                        
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 28-143;                                       
COMPND   5 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: BT3.2, BTF3, BTF4, BTF5, BTN3A1, BTN3A2, BUTYROPHILIN          
SOURCE   6 SUBFAMILY 3 MEMBER A1;                                               
SOURCE   7 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   8 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET22B(+)-HIS6                            
KEYWDS    IMMUNOGLOBULIN SUPERFAMILY, SIGNALING PROTEIN                         
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.KUMAR,L.MORI,G.DE LIBERO                                            
REVDAT   4   25-SEP-13 4K55    1       JRNL                                     
REVDAT   3   28-AUG-13 4K55    1       JRNL                                     
REVDAT   2   31-JUL-13 4K55    1       TITLE                                    
REVDAT   1   24-JUL-13 4K55    0                                                
JRNL        AUTH   S.VAVASSORI,A.KUMAR,G.S.WAN,G.S.RAMANJANEYULU,M.CAVALLARI,   
JRNL        AUTH 2 S.EL DAKER,T.BEDDOE,A.THEODOSSIS,N.K.WILLIAMS,E.GOSTICK,     
JRNL        AUTH 3 D.A.PRICE,D.U.SOUDAMINI,K.K.VOON,M.OLIVO,J.ROSSJOHN,L.MORI,  
JRNL        AUTH 4 G.DE LIBERO                                                  
JRNL        TITL   BUTYROPHILIN 3A1 BINDS PHOSPHORYLATED ANTIGENS AND           
JRNL        TITL 2 STIMULATES HUMAN GAMMA DELTA T CELLS.                        
JRNL        REF    NAT.IMMUNOL.                  V.  14   908 2013              
JRNL        REFN                   ISSN 1529-2908                               
JRNL        PMID   23872678                                                     
JRNL        DOI    10.1038/NI.2665                                              
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.91 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.6.0117                                      
REMARK   3   AUTHORS     : MURSHUDOV,VAGIN,DODSON                               
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.91                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 21.52                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.2                           
REMARK   3   NUMBER OF REFLECTIONS             : 9761                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.194                           
REMARK   3   R VALUE            (WORKING SET) : 0.192                           
REMARK   3   FREE R VALUE                     : 0.256                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 4.800                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 495                             
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.91                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.96                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 613                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 97.70                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1790                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 25                           
REMARK   3   BIN FREE R VALUE                    : 0.2590                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 916                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 15                                      
REMARK   3   SOLVENT ATOMS            : 84                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 14.90                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 23.06                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.02000                                              
REMARK   3    B22 (A**2) : -0.02000                                             
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 OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.158         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.161         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.093         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.083         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.946                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.894                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):   954 ; 0.021 ; 0.020       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  1294 ; 2.508 ; 1.977       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   119 ; 6.773 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):    42 ;32.570 ;23.810       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   159 ;16.249 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     6 ;17.850 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   143 ; 0.191 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):   717 ; 0.010 ; 0.021       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.20                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN USED IF PRESENT IN    
REMARK   3  THE INPUT                                                           
REMARK   4                                                                      
REMARK   4 4K55 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-APR-13.                  
REMARK 100 THE RCSB ID CODE IS RCSB078903.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 21-APR-12                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSRRC                              
REMARK 200  BEAMLINE                       : BL13B1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.0                                
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315R                  
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-2000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 10398                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.910                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 21.520                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.1                               
REMARK 200  DATA REDUNDANCY                : 4.800                              
REMARK 200  R MERGE                    (I) : 0.04600                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 30.0000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.91                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.98                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 97.2                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 4.70                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.07400                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 19.000                             
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: MOLREP                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 46.25                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.29                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.12 M ETHYLENE GLYCOLS, 0.1 M BUFFER    
REMARK 280  SYSTEM 1, 30% PEG 550 MME AND PEG 20,000, PH 6.5, VAPOR             
REMARK 280  DIFFUSION, HANGING DROP, TEMPERATURE 291K                           
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
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                                                                      
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       17.88300            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       16.35800            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       53.87200            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       16.35800            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       17.88300            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       53.87200            
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: ONE MOLECULE IN THE ASYMMETRIC UNIT                          
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     SER A     1                                                      
REMARK 465     ALA A     2                                                      
REMARK 465     HIS A   121                                                      
REMARK 465     HIS A   122                                                      
REMARK 465     HIS A   123                                                      
REMARK 465     HIS A   124                                                      
REMARK 480                                                                      
REMARK 480 ZERO OCCUPANCY ATOM                                                  
REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO                  
REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS                
REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME;              
REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):         
REMARK 480   M RES C SSEQI ATOMS                                                
REMARK 480     CYS A   25   N    CA   C    O    CB   SG                         
REMARK 480     CYS A   99   N    CA   C    O    CB   SG                         
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   366     O    HOH A   381              2.09            
REMARK 500   O    HOH A   324     O    HOH A   381              2.16            
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    HIS A  26   CG    HIS A  26   CD2     0.061                       
REMARK 500    HIS A 119   CG    HIS A 119   CD2     0.060                       
REMARK 500    HIS A 120   CG    HIS A 120   CD2     0.064                       
REMARK 500    HIS A 120   C     HIS A 120   O       0.216                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ARG A  74   NE  -  CZ  -  NH1 ANGL. DEV. =  -3.6 DEGREES          
REMARK 500    ARG A  74   NE  -  CZ  -  NH2 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    HIS A 120   CA  -  C   -  O   ANGL. DEV. = -21.5 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    LEU A  45      -16.96    167.93                                   
REMARK 500    GLU A 118     -138.38   -152.10                                   
REMARK 500    HIS A 119       82.81     55.90                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE H6P A 201                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 4JKW   RELATED DB: PDB                                   
DBREF  4K55 A    1   116  UNP    O00481   BT3A1_HUMAN     28    143             
SEQADV 4K55 LEU A  117  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 GLU A  118  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  119  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  120  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  121  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  122  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  123  UNP  O00481              EXPRESSION TAG                 
SEQADV 4K55 HIS A  124  UNP  O00481              EXPRESSION TAG                 
SEQRES   1 A  124  SER ALA GLN PHE SER VAL LEU GLY PRO SER GLY PRO ILE          
SEQRES   2 A  124  LEU ALA MET VAL GLY GLU ASP ALA ASP LEU PRO CYS HIS          
SEQRES   3 A  124  LEU PHE PRO THR MET SER ALA GLU THR MET GLU LEU LYS          
SEQRES   4 A  124  TRP VAL SER SER SER LEU ARG GLN VAL VAL ASN VAL TYR          
SEQRES   5 A  124  ALA ASP GLY LYS GLU VAL GLU ASP ARG GLN SER ALA PRO          
SEQRES   6 A  124  TYR ARG GLY ARG THR SER ILE LEU ARG ASP GLY ILE THR          
SEQRES   7 A  124  ALA GLY LYS ALA ALA LEU ARG ILE HIS ASN VAL THR ALA          
SEQRES   8 A  124  SER ASP SER GLY LYS TYR LEU CYS TYR PHE GLN ASP GLY          
SEQRES   9 A  124  ASP PHE TYR GLU LYS ALA LEU VAL GLU LEU LYS VAL LEU          
SEQRES  10 A  124  GLU HIS HIS HIS HIS HIS HIS                                  
HET    H6P  A 201      15                                                       
HETNAM     H6P (2E)-4-HYDROXY-3-METHYLBUT-2-EN-1-YL TRIHYDROGEN                 
HETNAM   2 H6P  DIPHOSPHATE                                                     
FORMUL   2  H6P    C5 H12 O8 P2                                                 
FORMUL   3  HOH   *84(H2 O)                                                     
HELIX    1   1 GLU A   59  GLN A   62  5                                   4    
HELIX    2   2 SER A   63  ARG A   67  5                                   5    
HELIX    3   3 GLY A   76  ALA A   79  5                                   4    
HELIX    4   4 THR A   90  SER A   94  5                                   5    
SHEET    1   A 4 SER A   5  LEU A   7  0                                        
SHEET    2   A 4 ALA A  21  PHE A  28 -1  O  HIS A  26   N  LEU A   7           
SHEET    3   A 4 LYS A  81  ILE A  86 -1  O  ALA A  82   N  CYS A  25           
SHEET    4   A 4 THR A  70  LEU A  73 -1  N  LEU A  73   O  ALA A  83           
SHEET    1   B 6 ILE A  13  MET A  16  0                                        
SHEET    2   B 6 PHE A 106  LEU A 117  1  O  LYS A 115   N  ILE A  13           
SHEET    3   B 6 GLY A  95  ASP A 103 -1  N  TYR A  97   O  VAL A 112           
SHEET    4   B 6 GLU A  37  SER A  42 -1  N  VAL A  41   O  LEU A  98           
SHEET    5   B 6 GLN A  47  ALA A  53 -1  O  GLN A  47   N  SER A  42           
SHEET    6   B 6 LYS A  56  GLU A  57 -1  O  LYS A  56   N  ALA A  53           
SSBOND   1 CYS A   25    CYS A   99                          1555   1555  2.07  
CISPEP   1 PHE A   28    PRO A   29          0        -4.40                     
SITE     1 AC1  4 LYS A  39  TYR A 100  GLN A 102  TYR A 107                    
CRYST1   35.766  107.744   32.716  90.00  90.00  90.00 P 21 21 21    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      0.027960  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.009281  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.030566        0.00000