HEADER    HORMONE/GROWTH FACTOR                   05-MAY-00   1EXZ              
TITLE     STRUCTURE OF STEM CELL FACTOR                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: STEM CELL FACTOR;                                          
COMPND   3 CHAIN: A, B, C, D;                                                   
COMPND   4 FRAGMENT: 26-166;                                                    
COMPND   5 SYNONYM: SCF;                                                        
COMPND   6 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    SCF, HORMONE-GROWTH FACTOR COMPLEX                                    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    Z.ZHANG,R.ZHANG,A.JOACHIMIAK,J.SCHLESSINGER,X.KONG                    
REVDAT   4   20-NOV-24 1EXZ    1       REMARK LINK                              
REVDAT   3   24-FEB-09 1EXZ    1       VERSN                                    
REVDAT   2   01-APR-03 1EXZ    1       JRNL                                     
REVDAT   1   06-JUL-00 1EXZ    0                                                
JRNL        AUTH   Z.ZHANG,R.ZHANG,A.JOACHIMIAK,J.SCHLESSINGER,X.P.KONG         
JRNL        TITL   CRYSTAL STRUCTURE OF HUMAN STEM CELL FACTOR: IMPLICATION FOR 
JRNL        TITL 2 STEM CELL FACTOR RECEPTOR DIMERIZATION AND ACTIVATION.       
JRNL        REF    PROC.NATL.ACAD.SCI.USA        V.  97  7732 2000              
JRNL        REFN                   ISSN 0027-8424                               
JRNL        PMID   10884405                                                     
JRNL        DOI    10.1073/PNAS.97.14.7732                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.30 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS                                                  
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : MLF                                             
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 40.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 10.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 21494                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOMLY SELECTED 10% OF        
REMARK   3                                      REFLECTIONS                     
REMARK   3   R VALUE            (WORKING SET) : 0.223                           
REMARK   3   FREE R VALUE                     : 0.294                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 2133                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : NULL                         
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : NULL                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                         
REMARK   3   BIN FREE R VALUE                    : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                         
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                         
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4090                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 14                                      
REMARK   3   SOLVENT ATOMS            : 132                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 45.00                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : NULL                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : NULL                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.220                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                      
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : NULL                                                 
REMARK   3   KSOL        : NULL                                                 
REMARK   3   BSOL        : NULL                                                 
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: MAXIMUM LIKELIHOOD TARGET USING           
REMARK   3  AMPLITUDES                                                          
REMARK   4                                                                      
REMARK   4 1EXZ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-MAY-00.                  
REMARK 100 THE DEPOSITION ID IS D_1000011008.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 26-NOV-99; NULL                    
REMARK 200  TEMPERATURE           (KELVIN) : 100; NULL                          
REMARK 200  PH                             : 7.0                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y; Y                               
REMARK 200  RADIATION SOURCE               : APS; APS                           
REMARK 200  BEAMLINE                       : 19-ID; 19-ID                       
REMARK 200  X-RAY GENERATOR MODEL          : NULL; NULL                         
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M; NULL                            
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.03; 1.55                         
REMARK 200  MONOCHROMATOR                  : NULL; NULL                         
REMARK 200  OPTICS                         : NULL; NULL                         
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD; NULL                          
REMARK 200  DETECTOR MANUFACTURER          : BRANDEIS; NULL                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 21454                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.300                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 40.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.5                               
REMARK 200  DATA REDUNDANCY                : 8.000                              
REMARK 200  R MERGE                    (I) : 0.05800                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 29.0000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.30                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.38                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 90.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 7.00                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.25000                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH; NULL                        
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: PHASES                                                
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 36.73                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.94                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 28% PEG 400, 250 MM CACL2, 1 MM SMCL3,   
REMARK 280  PH 7.0, VAPOR DIFFUSION, HANGING DROP                               
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       43.76300            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2, 3                                                 
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 2440 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 14630 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -36.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 1890 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 13680 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -13.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, D                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 3                                                       
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 6950 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 25680 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -65.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D                            
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 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     GLU A     1                                                      
REMARK 465     GLY A     2                                                      
REMARK 465     ILE A     3                                                      
REMARK 465     GLU A   134                                                      
REMARK 465     THR A   135                                                      
REMARK 465     SER A   136                                                      
REMARK 465     VAL A   140                                                      
REMARK 465     SER A   141                                                      
REMARK 465     GLU B   201                                                      
REMARK 465     GLU C   401                                                      
REMARK 465     GLY C   402                                                      
REMARK 465     ILE C   403                                                      
REMARK 465     CYS C   404                                                      
REMARK 465     ARG C   405                                                      
REMARK 465     ASN C   406                                                      
REMARK 465     ARG C   407                                                      
REMARK 465     VAL C   408                                                      
REMARK 465     VAL C   540                                                      
REMARK 465     SER C   541                                                      
REMARK 465     GLU D   601                                                      
REMARK 465     GLY D   602                                                      
REMARK 465     ILE D   603                                                      
REMARK 465     CYS D   604                                                      
REMARK 465     ARG D   605                                                      
REMARK 465     ASN D   606                                                      
REMARK 465     ARG D   607                                                      
REMARK 465     VAL D   608                                                      
REMARK 465     SER D   733                                                      
REMARK 465     GLU D   734                                                      
REMARK 465     THR D   735                                                      
REMARK 465     SER D   736                                                      
REMARK 465     ASP D   737                                                      
REMARK 465     CYS D   738                                                      
REMARK 465     VAL D   739                                                      
REMARK 465     VAL D   740                                                      
REMARK 465     SER D   741                                                      
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     ARG A   5    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ARG A   7    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ASN A  10    CG   OD1  ND2                                       
REMARK 470     GLU B 292    CG   CD   OE1  OE2                                  
REMARK 470     ASN B 293    CG   OD1  ND2                                       
REMARK 470     SER B 294    OG                                                  
REMARK 470     SER B 295    OG                                                  
REMARK 470     LYS B 296    CG   CD   CE   NZ                                   
REMARK 470     ASP B 297    CG   OD1  OD2                                       
REMARK 470     LEU B 298    CG   CD1  CD2                                       
REMARK 470     LYS B 299    CG   CD   CE   NZ                                   
REMARK 470     LYS B 300    CG   CD   CE   NZ                                   
REMARK 470     SER B 301    OG                                                  
REMARK 470     PHE B 302    CG   CD1  CD2  CE1  CE2  CZ                         
REMARK 470     LYS B 303    CG   CD   CE   NZ                                   
REMARK 470     SER B 341    OG                                                  
REMARK 470     ASN C 410    CG   OD1  ND2                                       
REMARK 470     LYS C 413    CG   CD   CE   NZ                                   
REMARK 470     LYS C 491    CG   CD   CE   NZ                                   
REMARK 470     GLU C 492    CG   CD   OE1  OE2                                  
REMARK 470     ASN C 493    CG   OD1  ND2                                       
REMARK 470     SER C 494    OG                                                  
REMARK 470     SER C 495    OG                                                  
REMARK 470     LYS C 496    CG   CD   CE   NZ                                   
REMARK 470     ASP C 497    CG   OD1  OD2                                       
REMARK 470     LEU C 498    CG   CD1  CD2                                       
REMARK 470     LYS C 499    CG   CD   CE   NZ                                   
REMARK 470     LYS C 500    CG   CD   CE   NZ                                   
REMARK 470     SER C 501    OG                                                  
REMARK 470     PHE C 502    CG   CD1  CD2  CE1  CE2  CZ                         
REMARK 470     LYS D 696    CG   CD   CE   NZ                                   
REMARK 470     LYS D 699    CG   CD   CE   NZ                                   
REMARK 470     LYS D 700    CG   CD   CE   NZ                                   
REMARK 470     SER D 701    OG                                                  
REMARK 470     PHE D 702    CG   CD1  CD2  CE1  CE2  CZ                         
REMARK 470     LYS D 703    CG   CD   CE   NZ                                   
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   OE1  GLU D   713    SM     SM B   803     2645     2.12            
REMARK 500   OE2  GLU A    88    SM     SM C   801     2656     2.17            
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   5      -65.87     -4.28                                   
REMARK 500    THR A   9       90.96     38.88                                   
REMARK 500    VAL A  12        3.11    -60.25                                   
REMARK 500    VAL A  38      -36.73   -146.47                                   
REMARK 500    TRP A  44      -21.13   -142.18                                   
REMARK 500    ILE A  66       35.65    166.97                                   
REMARK 500    SER A  67       13.51    -50.81                                   
REMARK 500    GLU A  68       42.53    -98.98                                   
REMARK 500    ASN A  93       54.54    -99.72                                   
REMARK 500    SER A  95      126.17    169.36                                   
REMARK 500    LYS A  96       -9.40     67.02                                   
REMARK 500    LEU A  98       57.40    -66.75                                   
REMARK 500    LYS A  99       99.50    -42.89                                   
REMARK 500    LYS A 100     -159.84     60.57                                   
REMARK 500    SER A 101      120.52    104.88                                   
REMARK 500    PHE A 102     -100.99     78.79                                   
REMARK 500    LYS A 103       67.43     72.96                                   
REMARK 500    SER A 104       49.82   -174.65                                   
REMARK 500    PRO A 105     -174.23    -69.18                                   
REMARK 500    ASP A 128       77.39   -104.68                                   
REMARK 500    VAL A 130      -38.11   -140.22                                   
REMARK 500    ALA A 132     -109.35    -67.13                                   
REMARK 500    CYS B 204       48.64     33.49                                   
REMARK 500    VAL B 208       41.56   -100.74                                   
REMARK 500    ASN B 211       86.07     65.79                                   
REMARK 500    PRO B 234      -60.17    -18.72                                   
REMARK 500    LYS B 291      -88.25    -57.38                                   
REMARK 500    ASN B 293      114.50    -31.48                                   
REMARK 500    ASP B 297      -44.02   -144.70                                   
REMARK 500    LEU B 298       17.24    163.50                                   
REMARK 500    LYS B 299       66.66    -64.06                                   
REMARK 500    LYS B 300      -70.48   -156.74                                   
REMARK 500    SER B 301       33.75     79.48                                   
REMARK 500    PHE B 302      -96.61     50.55                                   
REMARK 500    LYS B 303     -135.72   -110.80                                   
REMARK 500    ASP B 328       46.04    -91.09                                   
REMARK 500    ALA B 332      -52.19   -155.77                                   
REMARK 500    ASP B 337     -170.84    -66.40                                   
REMARK 500    VAL C 412       82.43    -62.81                                   
REMARK 500    LYS C 413      -50.46   -144.05                                   
REMARK 500    TRP C 444      -30.36   -135.06                                   
REMARK 500    LYS C 491       35.27    -85.08                                   
REMARK 500    GLU C 492       74.18    166.92                                   
REMARK 500    ASN C 493      -90.23    -99.98                                   
REMARK 500    SER C 494      -70.57   -148.85                                   
REMARK 500    SER C 495      -21.21    177.16                                   
REMARK 500    LYS C 500     -141.40    -63.37                                   
REMARK 500    SER C 501      -26.26     69.81                                   
REMARK 500    PHE C 502      -95.94     54.70                                   
REMARK 500    SER C 504       23.12   -179.37                                   
REMARK 500                                                                      
REMARK 500 THIS ENTRY HAS      76 RAMACHANDRAN OUTLIERS.                        
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                              CA A 806  CA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A  54   OD1                                                    
REMARK 620 2 ASP A  54   OD2  52.5                                              
REMARK 620 3 ASP A  58   OD1  74.4  79.4                                        
REMARK 620 4 HOH A 861   O   128.7  76.8 106.4                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              SM C 804  SM                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A 124   OD2                                                    
REMARK 620 2 ASP A 124   OD1  49.4                                              
REMARK 620 3 ASP A 128   OD2 103.1  85.9                                        
REMARK 620 4 VAL C 531   O   109.5  60.3  75.7                                  
REMARK 620 5 SER C 533   OG  141.7 164.3  80.5 108.3                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              SM B 802  SM                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ARG B 207   NH1                                                    
REMARK 620 2 ASP B 285   OD1  50.0                                              
REMARK 620 3 GLU B 288   OE2 103.9  73.5                                        
REMARK 620 4 ASP D 677   OD1 126.1 173.9 112.6                                  
REMARK 620 5 ASP D 677   OD2  83.2 131.8 114.5  46.3                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CA C 805  CA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 SER B 267   O                                                      
REMARK 620 2 HOH B 937   O    85.4                                              
REMARK 620 3 HOH B 943   O   130.4 142.5                                        
REMARK 620 4 GLU C 513   OE1 118.5  84.5  86.2                                  
REMARK 620 5 GLU C 513   OE2  66.8  94.7 108.6  54.0                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              SM B 803  SM                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B 337   OD2                                                    
REMARK 620 2 ASP B 337   OD1  44.1                                              
REMARK 620 3 VAL B 339   O    87.2  91.9                                        
REMARK 620 4 HOH B 859   O    65.7 109.1  93.4                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              SM C 801  SM                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP C 454   OD2                                                    
REMARK 620 2 ASP C 454   OD1  52.8                                              
REMARK 620 3 ASP C 458   OD2  79.7  97.0                                        
REMARK 620 4 ASP C 458   OD1 108.5  84.3  48.7                                  
REMARK 620 5 HOH C 946   O    71.7  81.2 145.2 161.2                            
REMARK 620 N                    1     2     3     4                             
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM C 801                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM B 802                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM B 803                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM C 804                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA C 805                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 806                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TRS D 807                 
DBREF  1EXZ A    1   141  UNP    P21583   SCF_HUMAN       26    166             
DBREF  1EXZ B  201   341  UNP    P21583   SCF_HUMAN       26    166             
DBREF  1EXZ C  401   541  UNP    P21583   SCF_HUMAN       26    166             
DBREF  1EXZ D  601   741  UNP    P21583   SCF_HUMAN       26    166             
SEQRES   1 A  141  GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS          
SEQRES   2 A  141  ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR          
SEQRES   3 A  141  MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU          
SEQRES   4 A  141  PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU          
SEQRES   5 A  141  SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN          
SEQRES   6 A  141  ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS          
SEQRES   7 A  141  LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS          
SEQRES   8 A  141  GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER          
SEQRES   9 A  141  PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG          
SEQRES  10 A  141  ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL          
SEQRES  11 A  141  VAL ALA SER GLU THR SER ASP CYS VAL VAL SER                  
SEQRES   1 B  141  GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS          
SEQRES   2 B  141  ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR          
SEQRES   3 B  141  MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU          
SEQRES   4 B  141  PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU          
SEQRES   5 B  141  SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN          
SEQRES   6 B  141  ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS          
SEQRES   7 B  141  LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS          
SEQRES   8 B  141  GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER          
SEQRES   9 B  141  PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG          
SEQRES  10 B  141  ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL          
SEQRES  11 B  141  VAL ALA SER GLU THR SER ASP CYS VAL VAL SER                  
SEQRES   1 C  141  GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS          
SEQRES   2 C  141  ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR          
SEQRES   3 C  141  MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU          
SEQRES   4 C  141  PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU          
SEQRES   5 C  141  SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN          
SEQRES   6 C  141  ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS          
SEQRES   7 C  141  LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS          
SEQRES   8 C  141  GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER          
SEQRES   9 C  141  PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG          
SEQRES  10 C  141  ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL          
SEQRES  11 C  141  VAL ALA SER GLU THR SER ASP CYS VAL VAL SER                  
SEQRES   1 D  141  GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS          
SEQRES   2 D  141  ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR          
SEQRES   3 D  141  MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU          
SEQRES   4 D  141  PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU          
SEQRES   5 D  141  SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN          
SEQRES   6 D  141  ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS          
SEQRES   7 D  141  LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS          
SEQRES   8 D  141  GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER          
SEQRES   9 D  141  PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG          
SEQRES  10 D  141  ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL          
SEQRES  11 D  141  VAL ALA SER GLU THR SER ASP CYS VAL VAL SER                  
HET     CA  A 806       1                                                       
HET     SM  B 802       1                                                       
HET     SM  B 803       1                                                       
HET     SM  C 801       1                                                       
HET     SM  C 804       1                                                       
HET     CA  C 805       1                                                       
HET    TRS  D 807       8                                                       
HETNAM      CA CALCIUM ION                                                      
HETNAM      SM SAMARIUM (III) ION                                               
HETNAM     TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL                         
HETSYN     TRS TRIS BUFFER                                                      
FORMUL   5   CA    2(CA 2+)                                                     
FORMUL   6   SM    4(SM 3+)                                                     
FORMUL  11  TRS    C4 H12 N O3 1+                                               
FORMUL  12  HOH   *132(H2 O)                                                    
HELIX    1   1 ASN A   11  ASN A   21  1                                  11    
HELIX    2   2 PRO A   40  CYS A   43  5                                   4    
HELIX    3   3 TRP A   44  ASP A   61  1                                  18    
HELIX    4   4 SER A   71  ASN A   93  1                                  23    
HELIX    5   5 THR A  111  ASP A  128  1                                  18    
HELIX    6   6 ASN B  211  ASN B  221  1                                  11    
HELIX    7   7 PRO B  240  CYS B  243  5                                   4    
HELIX    8   8 TRP B  244  ASP B  261  1                                  18    
HELIX    9   9 SER B  271  VAL B  290  1                                  20    
HELIX   10  10 THR B  311  ALA B  325  1                                  15    
HELIX   11  11 LYS C  413  ASN C  421  1                                   9    
HELIX   12  12 PRO C  440  CYS C  443  5                                   4    
HELIX   13  13 TRP C  444  ASP C  461  1                                  18    
HELIX   14  14 SER C  471  LYS C  491  1                                  21    
HELIX   15  15 THR C  511  ALA C  525  1                                  15    
HELIX   16  16 VAL D  612  ASN D  621  1                                  10    
HELIX   17  17 ILE D  645  ASP D  661  1                                  17    
HELIX   18  18 SER D  671  ASN D  693  1                                  23    
HELIX   19  19 THR D  711  LYS D  727  1                                  17    
SHEET    1   A 2 ILE A  28  TYR A  32  0                                        
SHEET    2   A 2 GLU A 106  PHE A 110 -1  O  GLU A 106   N  TYR A  32           
SHEET    1   B 2 ILE B 228  LYS B 231  0                                        
SHEET    2   B 2 PRO B 307  PHE B 310 -1  O  ARG B 308   N  LEU B 230           
SHEET    1   C 2 ILE C 428  LYS C 431  0                                        
SHEET    2   C 2 PRO C 507  PHE C 510 -1  O  ARG C 508   N  LEU C 430           
SHEET    1   D 2 ILE D 628  LYS D 631  0                                        
SHEET    2   D 2 PRO D 707  PHE D 710 -1  N  ARG D 708   O  LEU D 630           
SSBOND   1 CYS A    4    CYS A   89                          1555   1555  2.03  
SSBOND   2 CYS A   43    CYS A  138                          1555   1555  2.03  
SSBOND   3 CYS B  204    CYS B  289                          1555   1555  2.04  
SSBOND   4 CYS B  243    CYS B  338                          1555   1555  2.03  
SSBOND   5 CYS C  443    CYS C  538                          1555   1555  2.03  
LINK         OD1 ASP A  54                CA    CA A 806     1555   1555  2.04  
LINK         OD2 ASP A  54                CA    CA A 806     1555   1555  2.74  
LINK         OD1 ASP A  58                CA    CA A 806     1555   1555  3.29  
LINK         OD2 ASP A 124                SM    SM C 804     1555   1555  2.71  
LINK         OD1 ASP A 124                SM    SM C 804     1555   1555  2.53  
LINK         OD2 ASP A 128                SM    SM C 804     1555   1555  2.61  
LINK        CA    CA A 806                 O   HOH A 861     1555   1555  3.39  
LINK         NH1 ARG B 207                SM    SM B 802     1555   1555  3.10  
LINK         O   SER B 267                CA    CA C 805     1555   1555  2.31  
LINK         OD1 ASP B 285                SM    SM B 802     1555   1555  3.06  
LINK         OE2 GLU B 288                SM    SM B 802     1555   1555  2.90  
LINK         OD2 ASP B 337                SM    SM B 803     1555   1555  2.17  
LINK         OD1 ASP B 337                SM    SM B 803     1555   1555  3.15  
LINK         O   VAL B 339                SM    SM B 803     1555   1555  2.35  
LINK        SM    SM B 802                 OD1 ASP D 677     1555   1555  2.54  
LINK        SM    SM B 802                 OD2 ASP D 677     1555   1555  2.93  
LINK        SM    SM B 803                 O   HOH B 859     1555   1555  2.47  
LINK         O   HOH B 937                CA    CA C 805     1555   1555  2.38  
LINK         O   HOH B 943                CA    CA C 805     1555   1555  2.91  
LINK         OD2 ASP C 454                SM    SM C 801     1555   1555  2.43  
LINK         OD1 ASP C 454                SM    SM C 801     1555   1555  2.49  
LINK         OD2 ASP C 458                SM    SM C 801     1555   1555  2.45  
LINK         OD1 ASP C 458                SM    SM C 801     1555   1555  2.81  
LINK         OE1 GLU C 513                CA    CA C 805     1555   1555  2.46  
LINK         OE2 GLU C 513                CA    CA C 805     1555   1555  2.42  
LINK         O   VAL C 531                SM    SM C 804     1555   1555  2.70  
LINK         OG  SER C 533                SM    SM C 804     1555   1555  2.55  
LINK        SM    SM C 801                 O   HOH C 946     1555   1555  1.92  
SITE     1 AC1  3 ASP C 454  ASP C 458  HOH C 946                               
SITE     1 AC2  4 ARG B 207  ASP B 285  GLU B 288  ASP D 677                    
SITE     1 AC3  3 ASP B 337  VAL B 339  HOH B 859                               
SITE     1 AC4  5 ASP A 124  ASP A 128  PHE C 529  VAL C 531                    
SITE     2 AC4  5 SER C 533                                                     
SITE     1 AC5  4 SER B 267  HOH B 937  HOH B 943  GLU C 513                    
SITE     1 AC6  2 ASP A  54  ASP A  58                                          
SITE     1 AC7  3 GLU B 288  ASN D 681  ASP D 685                               
CRYST1   36.154   87.526   79.434  90.00  97.76  90.00 P 1 21 1      8          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.027659  0.000000  0.003769        0.00000                         
SCALE2      0.000000  0.011425  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012705        0.00000