HEADER    POTASSIUM CHANNELS                      06-MAR-98   1A68              
TITLE     CRYSTAL STRUCTURE OF THE TETRAMERIZATION DOMAIN OF THE SHAKER         
TITLE    2 POTASSIUM CHANNEL                                                    
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: POTASSIUM CHANNEL KV1.1;                                   
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: TETRAMERIZATION DOMAIN;                                    
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: APLYSIA CALIFORNICA;                            
SOURCE   3 ORGANISM_COMMON: CALIFORNIA SEA HARE;                                
SOURCE   4 ORGANISM_TAXID: 6500;                                                
SOURCE   5 CELL_LINE: BL21;                                                     
SOURCE   6 TISSUE: CENTRAL NERVOUS SYSTEM;                                      
SOURCE   7 CELLULAR_LOCATION: CYTOPLASM;                                        
SOURCE   8 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   9 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE  10 EXPRESSION_SYSTEM_STRAIN: BL21 (DE3);                                
SOURCE  11 EXPRESSION_SYSTEM_CELLULAR_LOCATION: CYTOPLASM;                      
SOURCE  12 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  13 EXPRESSION_SYSTEM_PLASMID: PET20B                                    
KEYWDS    POTASSIUM CHANNELS, TETRAMERIZATION DOMAIN, APLYSIA KV1.1             
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.KREUSCH,P.J.PFAFFINGER,C.F.STEVENS,S.CHOE                           
REVDAT   3   07-FEB-24 1A68    1       REMARK                                   
REVDAT   2   24-FEB-09 1A68    1       VERSN                                    
REVDAT   1   10-JUN-98 1A68    0                                                
JRNL        AUTH   A.KREUSCH,P.J.PFAFFINGER,C.F.STEVENS,S.CHOE                  
JRNL        TITL   CRYSTAL STRUCTURE OF THE TETRAMERIZATION DOMAIN OF THE       
JRNL        TITL 2 SHAKER POTASSIUM CHANNEL.                                    
JRNL        REF    NATURE                        V. 392   945 1998              
JRNL        REFN                   ISSN 0028-0836                               
JRNL        PMID   9582078                                                      
JRNL        DOI    10.1038/31978                                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.80 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR 3.851                                         
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 10.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 10000000.000                   
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0010                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 99.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 7712                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.200                           
REMARK   3   FREE R VALUE                     : 0.241                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 7.900                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 612                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.010                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.80                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.91                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 97.20                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 1145                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3340                       
REMARK   3   BIN FREE R VALUE                    : 0.3760                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 7.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 97                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.038                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 741                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 35                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 18.90                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 26.20                          
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) : 0.21                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.22                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.24                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.20                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.300                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 24.40                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.140                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 2.070 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 3.420 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 3.500 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 5.300 ; 2.500                
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  : PARHCSDX.PRO                                   
REMARK   3  PARAMETER FILE  2  : PARAM19.SOL                                    
REMARK   3  PARAMETER FILE  3  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : TOPHCSDX.PRO                                   
REMARK   3  TOPOLOGY FILE  2   : TOPH19.SOL                                     
REMARK   3  TOPOLOGY FILE  3   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1A68 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 100 THE DEPOSITION ID IS D_1000170443.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : AUG-95                             
REMARK 200  TEMPERATURE           (KELVIN) : 290                                
REMARK 200  PH                             : 8.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SSRL                               
REMARK 200  BEAMLINE                       : BL1-5                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9799                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD AREA DETECTOR                  
REMARK 200  DETECTOR MANUFACTURER          : SIEMENS                            
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 7712                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.800                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 25.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 3.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.0                               
REMARK 200  DATA REDUNDANCY                : 10.90                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.06300                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 8.8000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.80                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.91                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 97.2                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.03500                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.500                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: NULL                                           
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: X-PLOR 3.851                                          
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 39.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.00                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN WAS CRYSTALLIZED FROM 7-8%       
REMARK 280  PEG8000, 300 MM NACL, 200MM MGCL2, 20 MM TRIS, PH 8.5               
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 4                              
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z                                                 
REMARK 290       3555   -Y,X,Z                                                  
REMARK 290       4555   Y,-X,Z                                                  
REMARK 290       5555   X+1/2,Y+1/2,Z+1/2                                       
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -Y+1/2,X+1/2,Z+1/2                                      
REMARK 290       8555   Y+1/2,-X+1/2,Z+1/2                                      
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3  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        0.00000            
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        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000       25.51700            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       25.51700            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       32.80250            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       25.51700            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       25.51700            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       32.80250            
REMARK 290   SMTRY1   7  0.000000 -1.000000  0.000000       25.51700            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000       25.51700            
REMARK 290   SMTRY3   7  0.000000  0.000000  1.000000       32.80250            
REMARK 290   SMTRY1   8  0.000000  1.000000  0.000000       25.51700            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000       25.51700            
REMARK 290   SMTRY3   8  0.000000  0.000000  1.000000       32.80250            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TETRAMERIC                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   2  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT2   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   3  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT2   3  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   4  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     MET A    65                                                      
REMARK 465     GLU A   153                                                      
REMARK 465     ASN A   154                                                      
REMARK 465     ALA A   155                                                      
REMARK 465     PHE A   156                                                      
REMARK 465     GLU A   157                                                      
REMARK 465     ARG A   158                                                      
REMARK 465     TYR A   159                                                      
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    PHE A  87       79.40   -119.13                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  1A68 A   66   159  UNP    Q16968   Q16968_APLCA    66    159             
SEQRES   1 A   95  MET GLU ARG VAL VAL ILE ASN VAL SER GLY LEU ARG PHE          
SEQRES   2 A   95  GLU THR GLN LEU LYS THR LEU ASN GLN PHE PRO ASP THR          
SEQRES   3 A   95  LEU LEU GLY ASN PRO GLN LYS ARG ASN ARG TYR TYR ASP          
SEQRES   4 A   95  PRO LEU ARG ASN GLU TYR PHE PHE ASP ARG ASN ARG PRO          
SEQRES   5 A   95  SER PHE ASP ALA ILE LEU TYR PHE TYR GLN SER GLY GLY          
SEQRES   6 A   95  ARG LEU ARG ARG PRO VAL ASN VAL PRO LEU ASP VAL PHE          
SEQRES   7 A   95  SER GLU GLU ILE LYS PHE TYR GLU LEU GLY GLU ASN ALA          
SEQRES   8 A   95  PHE GLU ARG TYR                                              
FORMUL   2  HOH   *35(H2 O)                                                     
HELIX    1   1 LEU A   81  PHE A   87  1                                   7    
HELIX    2   2 PRO A   95  TYR A  101  1                                   7    
HELIX    3   3 PRO A  116  GLN A  126  5                                  11    
HELIX    4   4 LEU A  139  TYR A  149  1                                  11    
SHEET    1   A 3 LEU A  75  GLN A  80  0                                        
SHEET    2   A 3 ARG A  67  VAL A  72 -1  N  VAL A  72   O  LEU A  75           
SHEET    3   A 3 TYR A 109  PHE A 111  1  N  TYR A 109   O  ASN A  71           
CRYST1   51.034   51.034   65.605  90.00  90.00  90.00 I 4           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      0.019595  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.019595  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.015243        0.00000