HEADER    TOXIN                                   30-NOV-01   1KHO              
TITLE     CRYSTAL STRUCTURE ANALYSIS OF CLOSTRIDIUM PERFRINGENS ALPHA-TOXIN     
TITLE    2 ISOLATED FROM AVIAN STRAIN SWCP                                      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ALPHA-TOXIN;                                               
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: CLOSTRIDIUM PERFRINGENS;                        
SOURCE   3 ORGANISM_TAXID: 1502;                                                
SOURCE   4 GENE: CPA;                                                           
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21;                            
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 511693;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21                                       
KEYWDS    N-TERMINAL ALPHA-HELIX, C-TERMINAL BETA-SHEET, TOXIN                  
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    N.JUSTIN,D.S.MOSS,R.W.TITBALL,A.K.BASAK                               
REVDAT   3   14-FEB-24 1KHO    1       REMARK LINK                              
REVDAT   2   24-FEB-09 1KHO    1       VERSN                                    
REVDAT   1   19-JUN-02 1KHO    0                                                
JRNL        AUTH   N.JUSTIN,N.WALKER,H.L.BULLIFENT,G.SONGER,D.M.BUESCHEL,       
JRNL        AUTH 2 H.JOST,C.NAYLOR,J.MILLER,D.S.MOSS,R.W.TITBALL,A.K.BASAK      
JRNL        TITL   THE FIRST STRAIN OF CLOSTRIDIUM PERFRINGENS ISOLATED FROM AN 
JRNL        TITL 2 AVIAN SOURCE HAS AN ALPHA-TOXIN WITH DIVERGENT STRUCTURAL    
JRNL        TITL 3 AND KINETIC PROPERTIES.                                      
JRNL        REF    BIOCHEMISTRY                  V.  41  6253 2002              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   12009886                                                     
JRNL        DOI    10.1021/BI012015V                                            
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.40 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS                                                  
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                    
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
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)   (%) : 97.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 59406                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.210                           
REMARK   3   FREE R VALUE                     : 0.236                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 4828                            
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            : 5990                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 6                                       
REMARK   3   SOLVENT ATOMS            : 152                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
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) : 0.38                            
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) : 0.010                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.490                           
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: NULL                                      
REMARK   4                                                                      
REMARK   4 1KHO COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 04-DEC-01.                  
REMARK 100 THE DEPOSITION ID IS D_1000014972.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 03-MAR-99                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.4                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SRS                                
REMARK 200  BEAMLINE                       : PX9.6                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9                                
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : CCP4 (SCALA)                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 59406                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.400                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.7                               
REMARK 200  DATA REDUNDANCY                : 6.900                              
REMARK 200  R MERGE                    (I) : 0.05700                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 25.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.40                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.65                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 91.3                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.18700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 6.800                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 72.46                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.47                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NA ACETATE, ACETONE, NA CACODYLATE, PH   
REMARK 280  6.4, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -Y,X,Z+1/4                                              
REMARK 290       4555   Y,-X,Z+3/4                                              
REMARK 290       5555   -X,Y,-Z                                                 
REMARK 290       6555   X,-Y,-Z+1/2                                             
REMARK 290       7555   Y,X,-Z+3/4                                              
REMARK 290       8555   -Y,-X,-Z+1/4                                            
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000      110.29500            
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000       55.14750            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000      165.44250            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000      110.29500            
REMARK 290   SMTRY1   7  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000      165.44250            
REMARK 290   SMTRY1   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000       55.14750            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
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: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: 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 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 B 194   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.3 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    ASN A  44       30.20    -99.29                                   
REMARK 500    ASN A  60     -155.33   -116.96                                   
REMARK 500    ASP A  75       22.45    -43.98                                   
REMARK 500    ASN A  76       75.07    161.60                                   
REMARK 500    ASP A 248       15.73    -68.89                                   
REMARK 500    SER A 249        7.74     45.87                                   
REMARK 500    SER A 250      127.40     67.41                                   
REMARK 500    ILE A 357      -70.73   -119.63                                   
REMARK 500    ASN B  60     -151.79   -147.03                                   
REMARK 500    ASP B  75      -11.26    -47.79                                   
REMARK 500    PHE B  78       87.59     38.25                                   
REMARK 500    ASP B  81      127.08    -29.54                                   
REMARK 500    ASP B 248      -92.87    -22.90                                   
REMARK 500    SER B 249      -31.78    168.47                                   
REMARK 500    SER B 250       91.77     83.13                                   
REMARK 500    TYR B 269       -1.57     77.52                                   
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                              ZN A 371  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 TRP A   1   O                                                      
REMARK 620 2 TRP A   1   N    70.8                                              
REMARK 620 3 HIS A  11   NE2  92.5 113.4                                        
REMARK 620 4 ASP A 130   OD2 164.8  94.0  94.9                                  
REMARK 620 5 HOH A 421   O    82.8 115.0 126.4 103.3                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN A 372  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A  56   OD1                                                    
REMARK 620 2 HIS A 126   NE2  88.9                                              
REMARK 620 3 ASP A 130   OD1 170.8  94.5                                        
REMARK 620 4 HOH A 421   O    76.6 121.1 108.7                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN A 373  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A 136   NE2                                                    
REMARK 620 2 HIS A 148   NE2  95.5                                              
REMARK 620 3 GLU A 152   OE2 148.6  92.0                                        
REMARK 620 4 GLU A 152   OE1  94.8 104.5  53.9                                  
REMARK 620 5 HOH A 374   O   100.0  77.1 111.3 164.9                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN B 374  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 TRP B   1   O                                                      
REMARK 620 2 TRP B   1   N    72.7                                              
REMARK 620 3 HIS B  11   NE2  87.2 111.9                                        
REMARK 620 4 ASP B 130   OD2 164.4  93.1 104.4                                  
REMARK 620 5 HOH B 424   O    84.9 108.3 134.4  93.9                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN B 375  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B  56   OD1                                                    
REMARK 620 2 HIS B 126   NE2  90.6                                              
REMARK 620 3 ASP B 130   OD1 165.3  82.1                                        
REMARK 620 4 HOH B 424   O    81.7 135.3 112.5                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN B 376  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS B 136   NE2                                                    
REMARK 620 2 HIS B 148   NE2  97.3                                              
REMARK 620 3 GLU B 152   OE1  96.9  99.7                                        
REMARK 620 4 GLU B 152   OE2 149.8  83.1  53.7                                  
REMARK 620 N                    1     2     3                                   
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 371                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 372                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 373                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 374                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 375                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 376                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1CA1   RELATED DB: PDB                                   
REMARK 900 ALPHA-TOXIN FROM CLOSTRIDIUM PERFRINGENS                             
REMARK 900 RELATED ID: 1QM6   RELATED DB: PDB                                   
REMARK 900 R32 FORM OF CLOSTRIDIUM PERFRINGENS ALPHA-TOXIN STRAIN               
REMARK 900 RELATED ID: 1QMD   RELATED DB: PDB                                   
REMARK 900 CALCIUM BOUND CLOSED FORM ALPHA-TOXIN FROM CLOSTRIDIUM PERFRINGENS   
DBREF  1KHO A    1   370  UNP    Q9RF12   PHLC2_CLOPE     29    398             
DBREF  1KHO B    1   370  UNP    Q9RF12   PHLC2_CLOPE     29    398             
SEQRES   1 A  370  TRP ASP GLY LYS ALA ASP GLY THR GLY THR HIS ALA MET          
SEQRES   2 A  370  ILE ALA THR GLN GLY VAL THR ILE LEU GLU ASN ASP LEU          
SEQRES   3 A  370  SER SER ASN GLU PRO GLU VAL ILE ARG ASN ASN LEU GLU          
SEQRES   4 A  370  ILE LEU LYS GLN ASN MET HIS ASP LEU GLN LEU GLY SER          
SEQRES   5 A  370  THR TYR PRO ASP TYR ASP LYS ASN ALA TYR ASP LEU TYR          
SEQRES   6 A  370  GLN ASP HIS PHE TRP ASP PRO ASP THR ASP ASN ASN PHE          
SEQRES   7 A  370  THR LYS ASP SER LYS TRP TYR LEU SER TYR SER ILE PRO          
SEQRES   8 A  370  ASP THR ALA GLU SER GLN ILE ARG LYS PHE SER ALA LEU          
SEQRES   9 A  370  ALA ARG TYR GLU TRP LYS ARG GLY ASN TYR LYS GLN ALA          
SEQRES  10 A  370  THR PHE TYR LEU GLY GLU ALA MET HIS TYR PHE GLY ASP          
SEQRES  11 A  370  ALA ASP THR PRO TYR HIS ALA ALA ASN VAL THR ALA VAL          
SEQRES  12 A  370  ASP SER PRO GLY HIS VAL LYS PHE GLU THR PHE ALA GLU          
SEQRES  13 A  370  ASP ARG LYS ASP GLN TYR LYS ILE ASN THR THR GLY SER          
SEQRES  14 A  370  LYS THR ASN ASP ALA PHE TYR SER ASN ILE LEU THR ASN          
SEQRES  15 A  370  GLU ASP PHE ASN SER TRP SER LYS GLU PHE ALA ARG SER          
SEQRES  16 A  370  PHE ALA LYS THR ALA LYS ASP LEU TYR TYR SER HIS ALA          
SEQRES  17 A  370  ASN MET SER CYS SER TRP ASP GLU TRP ASP TYR ALA ALA          
SEQRES  18 A  370  LYS VAL ALA LEU ALA ASN SER GLN LYS GLY THR SER GLY          
SEQRES  19 A  370  TYR ILE TYR ARG PHE LEU HIS ASP VAL SER ASP GLY LYS          
SEQRES  20 A  370  ASP SER SER ALA ASN LYS ASN VAL ASN GLU LEU VAL ALA          
SEQRES  21 A  370  TYR ILE THR THR GLY GLY GLU LYS TYR ALA GLY THR ASP          
SEQRES  22 A  370  ASP TYR MET TYR PHE GLY ILE LYS THR LYS ASP GLY GLN          
SEQRES  23 A  370  THR GLN GLU TRP THR MET ASP ASN PRO GLY ASN ASP PHE          
SEQRES  24 A  370  MET THR GLY SER GLN ASP THR TYR THR PHE LYS LEU LYS          
SEQRES  25 A  370  ASP LYS ASN LEU LYS ILE ASP ASP ILE GLN ASN MET TRP          
SEQRES  26 A  370  ILE ARG LYS SER LYS TYR THR GLU PHE GLY ASP ASP TYR          
SEQRES  27 A  370  LYS PRO ALA ASN ILE LYS VAL ILE ALA ASN GLY ASN VAL          
SEQRES  28 A  370  VAL LEU ASN LYS ASP ILE ASN GLU TRP ILE SER GLY ASN          
SEQRES  29 A  370  SER THR TYR ASN ILE LYS                                      
SEQRES   1 B  370  TRP ASP GLY LYS ALA ASP GLY THR GLY THR HIS ALA MET          
SEQRES   2 B  370  ILE ALA THR GLN GLY VAL THR ILE LEU GLU ASN ASP LEU          
SEQRES   3 B  370  SER SER ASN GLU PRO GLU VAL ILE ARG ASN ASN LEU GLU          
SEQRES   4 B  370  ILE LEU LYS GLN ASN MET HIS ASP LEU GLN LEU GLY SER          
SEQRES   5 B  370  THR TYR PRO ASP TYR ASP LYS ASN ALA TYR ASP LEU TYR          
SEQRES   6 B  370  GLN ASP HIS PHE TRP ASP PRO ASP THR ASP ASN ASN PHE          
SEQRES   7 B  370  THR LYS ASP SER LYS TRP TYR LEU SER TYR SER ILE PRO          
SEQRES   8 B  370  ASP THR ALA GLU SER GLN ILE ARG LYS PHE SER ALA LEU          
SEQRES   9 B  370  ALA ARG TYR GLU TRP LYS ARG GLY ASN TYR LYS GLN ALA          
SEQRES  10 B  370  THR PHE TYR LEU GLY GLU ALA MET HIS TYR PHE GLY ASP          
SEQRES  11 B  370  ALA ASP THR PRO TYR HIS ALA ALA ASN VAL THR ALA VAL          
SEQRES  12 B  370  ASP SER PRO GLY HIS VAL LYS PHE GLU THR PHE ALA GLU          
SEQRES  13 B  370  ASP ARG LYS ASP GLN TYR LYS ILE ASN THR THR GLY SER          
SEQRES  14 B  370  LYS THR ASN ASP ALA PHE TYR SER ASN ILE LEU THR ASN          
SEQRES  15 B  370  GLU ASP PHE ASN SER TRP SER LYS GLU PHE ALA ARG SER          
SEQRES  16 B  370  PHE ALA LYS THR ALA LYS ASP LEU TYR TYR SER HIS ALA          
SEQRES  17 B  370  ASN MET SER CYS SER TRP ASP GLU TRP ASP TYR ALA ALA          
SEQRES  18 B  370  LYS VAL ALA LEU ALA ASN SER GLN LYS GLY THR SER GLY          
SEQRES  19 B  370  TYR ILE TYR ARG PHE LEU HIS ASP VAL SER ASP GLY LYS          
SEQRES  20 B  370  ASP SER SER ALA ASN LYS ASN VAL ASN GLU LEU VAL ALA          
SEQRES  21 B  370  TYR ILE THR THR GLY GLY GLU LYS TYR ALA GLY THR ASP          
SEQRES  22 B  370  ASP TYR MET TYR PHE GLY ILE LYS THR LYS ASP GLY GLN          
SEQRES  23 B  370  THR GLN GLU TRP THR MET ASP ASN PRO GLY ASN ASP PHE          
SEQRES  24 B  370  MET THR GLY SER GLN ASP THR TYR THR PHE LYS LEU LYS          
SEQRES  25 B  370  ASP LYS ASN LEU LYS ILE ASP ASP ILE GLN ASN MET TRP          
SEQRES  26 B  370  ILE ARG LYS SER LYS TYR THR GLU PHE GLY ASP ASP TYR          
SEQRES  27 B  370  LYS PRO ALA ASN ILE LYS VAL ILE ALA ASN GLY ASN VAL          
SEQRES  28 B  370  VAL LEU ASN LYS ASP ILE ASN GLU TRP ILE SER GLY ASN          
SEQRES  29 B  370  SER THR TYR ASN ILE LYS                                      
HET     ZN  A 371       1                                                       
HET     ZN  A 372       1                                                       
HET     ZN  A 373       1                                                       
HET     ZN  B 374       1                                                       
HET     ZN  B 375       1                                                       
HET     ZN  B 376       1                                                       
HETNAM      ZN ZINC ION                                                         
FORMUL   3   ZN    6(ZN 2+)                                                     
FORMUL   9  HOH   *152(H2 O)                                                    
HELIX    1   1 GLY A    9  LEU A   26  1                                  18    
HELIX    2   2 PRO A   31  ASN A   44  1                                  14    
HELIX    3   3 ASN A   44  TYR A   54  1                                  11    
HELIX    4   4 PRO A   55  TYR A   57  5                                   3    
HELIX    5   5 TYR A   65  PHE A   69  5                                   5    
HELIX    6   6 SER A   82  SER A   87  5                                   6    
HELIX    7   7 THR A   93  ARG A  111  1                                  19    
HELIX    8   8 ASN A  113  ASP A  132  1                                  20    
HELIX    9   9 THR A  133  ALA A  138  1                                   6    
HELIX   10  10 PRO A  146  ARG A  158  1                                  13    
HELIX   11  11 LYS A  159  LYS A  163  5                                   5    
HELIX   12  12 ASP A  173  THR A  181  1                                   9    
HELIX   13  13 ASP A  184  HIS A  207  1                                  24    
HELIX   14  14 SER A  213  ASP A  245  1                                  33    
HELIX   15  15 LYS A  317  ASP A  319  5                                   3    
HELIX   16  16 GLY B    9  LEU B   26  1                                  18    
HELIX   17  17 PRO B   31  ASN B   44  1                                  14    
HELIX   18  18 ASN B   44  TYR B   54  1                                  11    
HELIX   19  19 PRO B   55  TYR B   57  5                                   3    
HELIX   20  20 TYR B   65  PHE B   69  5                                   5    
HELIX   21  21 SER B   82  SER B   87  5                                   6    
HELIX   22  22 THR B   93  GLY B  112  1                                  20    
HELIX   23  23 ASN B  113  ASP B  132  1                                  20    
HELIX   24  24 THR B  133  ALA B  138  1                                   6    
HELIX   25  25 PRO B  146  ARG B  158  1                                  13    
HELIX   26  26 LYS B  159  LYS B  163  5                                   5    
HELIX   27  27 ASP B  173  THR B  181  1                                   9    
HELIX   28  28 ASP B  184  HIS B  207  1                                  24    
HELIX   29  29 SER B  213  ASP B  245  1                                  33    
HELIX   30  30 LYS B  317  ASP B  319  5                                   3    
SHEET    1   A 4 GLN A 304  LYS A 310  0                                        
SHEET    2   A 4 GLU A 257  THR A 264 -1  N  LEU A 258   O  PHE A 309           
SHEET    3   A 4 PRO A 340  ALA A 347 -1  O  ILE A 346   N  VAL A 259           
SHEET    4   A 4 ASN A 350  ASP A 356 -1  O  LYS A 355   N  ILE A 343           
SHEET    1   B 4 THR A 287  THR A 291  0                                        
SHEET    2   B 4 TYR A 275  THR A 282 -1  N  PHE A 278   O  TRP A 290           
SHEET    3   B 4 ILE A 321  SER A 329 -1  O  TRP A 325   N  GLY A 279           
SHEET    4   B 4 SER A 365  ASN A 368 -1  O  SER A 365   N  LYS A 328           
SHEET    1   C 4 GLN B 304  LYS B 310  0                                        
SHEET    2   C 4 GLU B 257  THR B 264 -1  N  LEU B 258   O  PHE B 309           
SHEET    3   C 4 PRO B 340  ALA B 347 -1  O  ILE B 346   N  VAL B 259           
SHEET    4   C 4 ASN B 350  ASP B 356 -1  O  ASN B 350   N  ALA B 347           
SHEET    1   D 4 THR B 287  THR B 291  0                                        
SHEET    2   D 4 TYR B 275  THR B 282 -1  N  PHE B 278   O  TRP B 290           
SHEET    3   D 4 ILE B 321  SER B 329 -1  O  ARG B 327   N  TYR B 277           
SHEET    4   D 4 SER B 365  ASN B 368 -1  O  TYR B 367   N  ILE B 326           
LINK         O   TRP A   1                ZN    ZN A 371     1555   1555  2.44  
LINK         N   TRP A   1                ZN    ZN A 371     1555   1555  2.30  
LINK         NE2 HIS A  11                ZN    ZN A 371     1555   1555  2.23  
LINK         OD1 ASP A  56                ZN    ZN A 372     1555   1555  2.50  
LINK         NE2 HIS A 126                ZN    ZN A 372     1555   1555  2.26  
LINK         OD2 ASP A 130                ZN    ZN A 371     1555   1555  2.33  
LINK         OD1 ASP A 130                ZN    ZN A 372     1555   1555  2.32  
LINK         NE2 HIS A 136                ZN    ZN A 373     1555   1555  2.33  
LINK         NE2 HIS A 148                ZN    ZN A 373     1555   1555  2.32  
LINK         OE2 GLU A 152                ZN    ZN A 373     1555   1555  2.55  
LINK         OE1 GLU A 152                ZN    ZN A 373     1555   1555  2.31  
LINK        ZN    ZN A 371                 O   HOH A 421     1555   1555  2.40  
LINK        ZN    ZN A 372                 O   HOH A 421     1555   1555  2.34  
LINK        ZN    ZN A 373                 O   HOH A 374     1555   1555  2.49  
LINK         O   TRP B   1                ZN    ZN B 374     1555   1555  2.32  
LINK         N   TRP B   1                ZN    ZN B 374     1555   1555  2.43  
LINK         NE2 HIS B  11                ZN    ZN B 374     1555   1555  2.20  
LINK         OD1 ASP B  56                ZN    ZN B 375     1555   1555  2.53  
LINK         NE2 HIS B 126                ZN    ZN B 375     1555   1555  2.20  
LINK         OD2 ASP B 130                ZN    ZN B 374     1555   1555  2.35  
LINK         OD1 ASP B 130                ZN    ZN B 375     1555   1555  2.36  
LINK         NE2 HIS B 136                ZN    ZN B 376     1555   1555  2.27  
LINK         NE2 HIS B 148                ZN    ZN B 376     1555   1555  2.29  
LINK         OE1 GLU B 152                ZN    ZN B 376     1555   1555  2.38  
LINK         OE2 GLU B 152                ZN    ZN B 376     1555   1555  2.48  
LINK        ZN    ZN B 374                 O   HOH B 424     1555   1555  2.57  
LINK        ZN    ZN B 375                 O   HOH B 424     1555   1555  2.53  
SITE     1 AC1  5 TRP A   1  HIS A  11  ASP A 130   ZN A 372                    
SITE     2 AC1  5 HOH A 421                                                     
SITE     1 AC2  6 ASP A  56  HIS A  68  HIS A 126  ASP A 130                    
SITE     2 AC2  6  ZN A 371  HOH A 421                                          
SITE     1 AC3  4 HIS A 136  HIS A 148  GLU A 152  HOH A 374                    
SITE     1 AC4  5 TRP B   1  HIS B  11  ASP B 130   ZN B 375                    
SITE     2 AC4  5 HOH B 424                                                     
SITE     1 AC5  6 ASP B  56  HIS B  68  HIS B 126  ASP B 130                    
SITE     2 AC5  6  ZN B 374  HOH B 424                                          
SITE     1 AC6  4 HIS B 136  HIS B 148  GLU B 152  HOH B 377                    
CRYST1  117.230  117.230  220.590  90.00  90.00  90.00 P 41 2 2     16          
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      0.008530  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.008530  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.004533        0.00000