HEADER    MEMBRANE PROTEIN                        29-FEB-20   6W0E              
TITLE     OPEN-GATE KCSA SOAKED IN 10 MM BACL2                                  
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: FAB HEAVY CHAIN;                                           
COMPND   3 CHAIN: A;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: FAB LIGHT CHAIN;                                           
COMPND   7 CHAIN: B;                                                            
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MOL_ID: 3;                                                           
COMPND  10 MOLECULE: PH-GATED POTASSIUM CHANNEL KCSA;                           
COMPND  11 CHAIN: C;                                                            
COMPND  12 SYNONYM: STREPTOMYCES LIVIDANS K+ CHANNEL,SKC1;                      
COMPND  13 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS;                              
SOURCE   3 ORGANISM_TAXID: 10116;                                               
SOURCE   4 EXPRESSION_SYSTEM: HOMO SAPIENS;                                     
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 9606;                                       
SOURCE   6 MOL_ID: 2;                                                           
SOURCE   7 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS;                              
SOURCE   8 ORGANISM_TAXID: 10116;                                               
SOURCE   9 EXPRESSION_SYSTEM: HOMO SAPIENS;                                     
SOURCE  10 EXPRESSION_SYSTEM_TAXID: 9606;                                       
SOURCE  11 MOL_ID: 3;                                                           
SOURCE  12 ORGANISM_SCIENTIFIC: STREPTOMYCES LIVIDANS;                          
SOURCE  13 ORGANISM_TAXID: 1916;                                                
SOURCE  14 GENE: KCSA, SKC1;                                                    
SOURCE  15 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  16 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    ION CHANNEL, MEMBRANE PROTEIN                                         
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.ROHAIM,L.GONG,J.LI                                                  
REVDAT   5   09-OCT-24 6W0E    1       REMARK                                   
REVDAT   4   11-OCT-23 6W0E    1       REMARK                                   
REVDAT   3   19-AUG-20 6W0E    1       JRNL   LINK                              
REVDAT   2   15-JUL-20 6W0E    1       JRNL                                     
REVDAT   1   08-JUL-20 6W0E    0                                                
JRNL        AUTH   A.ROHAIM,L.GONG,J.LI,H.RUI,L.BLACHOWICZ,B.ROUX               
JRNL        TITL   OPEN AND CLOSED STRUCTURES OF A BARIUM-BLOCKED POTASSIUM     
JRNL        TITL 2 CHANNEL.                                                     
JRNL        REF    J.MOL.BIOL.                   V. 432  4783 2020              
JRNL        REFN                   ESSN 1089-8638                               
JRNL        PMID   32615129                                                     
JRNL        DOI    10.1016/J.JMB.2020.06.012                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    3.51 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX 1.14_3260                                     
REMARK   3   AUTHORS     : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN            
REMARK   3               : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE,           
REMARK   3               : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER,            
REMARK   3               : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY,              
REMARK   3               : REETAL PAI,RANDY READ,JANE RICHARDSON,               
REMARK   3               : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI,           
REMARK   3               : NICHOLAS SAUTER,JACOB SMITH,LAURENT                  
REMARK   3               : STORONI,TOM TERWILLIGER,PETER ZWART                  
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : NULL                                          
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 3.51                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 51.22                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : 1.340                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 11500                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.196                           
REMARK   3   R VALUE            (WORKING SET) : 0.194                           
REMARK   3   FREE R VALUE                     : 0.250                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 4.630                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 533                             
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (IN BINS).                           
REMARK   3   BIN  RESOLUTION RANGE  COMPL.    NWORK NFREE   RWORK  RFREE        
REMARK   3     1 51.2200 -  5.5729    0.99     2812   132  0.1636 0.2229        
REMARK   3     2  5.5729 -  4.4242    1.00     2763   147  0.1739 0.2258        
REMARK   3     3  4.4242 -  3.8651    1.00     2757   121  0.2259 0.2954        
REMARK   3     4  3.8651 -  3.5120    0.96     2635   133  0.2943 0.3398        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : FLAT BULK SOLVENT MODEL                       
REMARK   3   SOLVENT RADIUS     : 1.11                                          
REMARK   3   SHRINKAGE RADIUS   : 0.90                                          
REMARK   3   K_SOL              : NULL                                          
REMARK   3   B_SOL              : NULL                                          
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : 0.530            
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 26.010           
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 123.0                          
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  TWINNING INFORMATION.                                               
REMARK   3   FRACTION: NULL                                                     
REMARK   3   OPERATOR: NULL                                                     
REMARK   3                                                                      
REMARK   3  DEVIATIONS FROM IDEAL VALUES.                                       
REMARK   3                 RMSD          COUNT                                  
REMARK   3   BOND      :  0.004           4048                                  
REMARK   3   ANGLE     :  0.766           5534                                  
REMARK   3   CHIRALITY :  0.045            638                                  
REMARK   3   PLANARITY :  0.005            700                                  
REMARK   3   DIHEDRAL  :  3.790           2371                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 3                                          
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    SELECTION: ( CHAIN A AND RESID 1:219 )                            
REMARK   3    ORIGIN FOR THE GROUP (A):  -21.442  -38.748   -9.272              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   1.5904 T22:   0.9035                                     
REMARK   3      T33:   0.9934 T12:  -0.4594                                     
REMARK   3      T13:  -0.0669 T23:   0.0404                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.5578 L22:   3.3264                                     
REMARK   3      L33:   5.7559 L12:   1.3426                                     
REMARK   3      L13:  -3.4002 L23:  -1.5323                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.3794 S12:   0.0352 S13:  -0.5159                       
REMARK   3      S21:   0.1201 S22:  -0.0243 S23:  -0.3732                       
REMARK   3      S31:   1.6017 S32:  -0.7948 S33:   0.3706                       
REMARK   3   TLS GROUP : 2                                                      
REMARK   3    SELECTION: ( CHAIN B AND RESID 1:212 )                            
REMARK   3    ORIGIN FOR THE GROUP (A):  -26.052  -26.654    2.978              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   1.1289 T22:   1.0403                                     
REMARK   3      T33:   0.8292 T12:  -0.3636                                     
REMARK   3      T13:  -0.0790 T23:   0.0505                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.7633 L22:   2.1823                                     
REMARK   3      L33:   5.0585 L12:   1.3632                                     
REMARK   3      L13:  -3.0131 L23:  -1.4240                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.0356 S12:  -0.2656 S13:   0.0410                       
REMARK   3      S21:   0.6217 S22:  -0.0027 S23:  -0.0829                       
REMARK   3      S31:   0.5384 S32:  -0.4330 S33:  -0.1696                       
REMARK   3   TLS GROUP : 3                                                      
REMARK   3    SELECTION: ( CHAIN C AND RESID 28:120 )                           
REMARK   3    ORIGIN FOR THE GROUP (A):   -6.992  -10.822  -42.723              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.6905 T22:   0.8837                                     
REMARK   3      T33:   0.8673 T12:  -0.1197                                     
REMARK   3      T13:  -0.0695 T23:  -0.0839                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.3147 L22:   4.8543                                     
REMARK   3      L33:   6.9738 L12:  -1.5937                                     
REMARK   3      L13:  -0.4524 L23:  -2.0634                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.2023 S12:   0.7942 S13:  -0.1833                       
REMARK   3      S21:  -0.6927 S22:  -0.0006 S23:   0.3177                       
REMARK   3      S31:  -0.1800 S32:  -0.1889 S33:   0.0238                       
REMARK   3                                                                      
REMARK   3  NCS DETAILS                                                         
REMARK   3   NUMBER OF NCS GROUPS : NULL                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 6W0E COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-MAR-20.                  
REMARK 100 THE DEPOSITION ID IS D_1000247404.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 08-FEB-17                          
REMARK 200  TEMPERATURE           (KELVIN) : 98                                 
REMARK 200  PH                             : 5.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 24-ID-E                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9792                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : PIXEL                              
REMARK 200  DETECTOR MANUFACTURER          : DECTRIS EIGER X 16M                
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : XDS                                
REMARK 200  DATA SCALING SOFTWARE          : AIMLESS                            
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 11509                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 3.500                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 51.220                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.9                               
REMARK 200  DATA REDUNDANCY                : 4.100                              
REMARK 200  R MERGE                    (I) : 0.17000                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 8.7000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 3.50                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 3.60                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER                                                
REMARK 200 STARTING MODEL: 1K4C                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 70.06                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.11                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 20 % PEG 400, 50 MM MAGNESIUM ACETATE,   
REMARK 280  50 MM SODIUM ACETATE, PH 5.5, VAPOR DIFFUSION, HANGING DROP,        
REMARK 280  TEMPERATURE 293K                                                    
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       79.14150            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       79.14150            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       37.10350            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       79.14150            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       79.14150            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       37.10350            
REMARK 290   SMTRY1   7  0.000000 -1.000000  0.000000       79.14150            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000       79.14150            
REMARK 290   SMTRY3   7  0.000000  0.000000  1.000000       37.10350            
REMARK 290   SMTRY1   8  0.000000  1.000000  0.000000       79.14150            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000       79.14150            
REMARK 290   SMTRY3   8  0.000000  0.000000  1.000000       37.10350            
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: DODECAMERIC                       
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DODECAMERIC                
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 29580 ANGSTROM**2                         
REMARK 350 SURFACE AREA OF THE COMPLEX: 86280 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -188.0 KCAL/MOL                       
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C                               
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 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  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  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT2   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT3   4  0.000000  0.000000  1.000000        0.00000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375 BA    BA C 201  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K C 202  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH C 303  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH C 304  LIES ON A SPECIAL POSITION.                          
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     GLN A   1    N    CA                                             
REMARK 470     LYS A  23    CG   CD   CE   NZ                                   
REMARK 470     LYS A  63    CG   CD   CE   NZ                                   
REMARK 470     GLN A  65    CG   CD   OE1  NE2                                  
REMARK 470     LYS A  74    CG   CD   CE   NZ                                   
REMARK 470     GLU A  89    CG   CD   OE1  OE2                                  
REMARK 470     LYS A 120    CG   CD   CE   NZ                                   
REMARK 470     GLN A 136    CG   CD   OE1  NE2                                  
REMARK 470     THR A 137    OG1  CG2                                            
REMARK 470     ASN A 138    CG   OD1  ND2                                       
REMARK 470     SER A 165    OG                                                  
REMARK 470     SER A 166    OG                                                  
REMARK 470     SER A 177    OG                                                  
REMARK 470     ASP A 178    CG   OD1  OD2                                       
REMARK 470     ASP A 219    CG   OD1  OD2                                       
REMARK 470     ASN B 212    CG   OD1  ND2                                       
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   OE1  GLU C    71     O    HOH C   301              1.22            
REMARK 500   CB   LEU C    59     O    HOH C   302              2.12            
REMARK 500   O    PRO A   128     OG   SER B   121              2.14            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   OG1  THR C   101     CG2  THR C   107     3555     1.46            
REMARK 500   CB   THR C   101     CG2  THR C   107     3555     2.18            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ALA B  51   CB  -  CA  -  C   ANGL. DEV. =  -9.7 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    GLN A   3      -76.22    -81.34                                   
REMARK 500    CYS A  22       89.18   -159.47                                   
REMARK 500    SER A  76      -17.45   -159.46                                   
REMARK 500    SER A  85       78.42     57.66                                   
REMARK 500    ALA A 134       65.41   -154.98                                   
REMARK 500    GLN A 176      107.88   -164.65                                   
REMARK 500    LYS A 213      115.96   -160.11                                   
REMARK 500    ASP B  32       56.79    -92.04                                   
REMARK 500    ASN B  41      -11.20     74.91                                   
REMARK 500    ARG B  45      118.65   -165.25                                   
REMARK 500    LEU B  47      -64.75   -122.54                                   
REMARK 500    ALA B  51      -13.60     71.90                                   
REMARK 500    SER B  52      -46.35   -140.57                                   
REMARK 500    SER B  77      163.08     92.56                                   
REMARK 500    SER B 162      119.99   -160.42                                   
REMARK 500    ASP B 170      -23.83   -148.39                                   
REMARK 500    SER B 171       39.71     79.16                                   
REMARK 500    SER B 177       91.47   -162.15                                   
REMARK 500    LEU B 181     -153.78   -140.68                                   
REMARK 500    ARG B 188       42.44   -105.87                                   
REMARK 500    ALA C  29      -80.41    -51.98                                   
REMARK 500    ALA C  31      -61.16   -100.04                                   
REMARK 500    LEU C  59       53.90    -91.76                                   
REMARK 500    PRO C  63      -77.24    -54.93                                   
REMARK 500    GLU C  71      -26.95    -35.86                                   
REMARK 500    THR C  75       -8.97      9.78                                   
REMARK 500    ASP C  80      -78.97    -72.11                                   
REMARK 500    LEU C 105      -37.01   -132.00                                   
REMARK 500    TRP C 113      -74.36    -38.19                                   
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                              BA C 201  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 THR C  75   O                                                      
REMARK 620 2 THR C  75   O     0.0                                              
REMARK 620 3 HOH C 303   O    57.2  57.2                                        
REMARK 620 4 HOH C 303   O    57.2  57.2   0.0                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K C 202   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLY C  77   O                                                      
REMARK 620 2 GLY C  77   O     0.0                                              
REMARK 620 N                    1                                               
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: binding site for residue BA C 201                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: binding site for residue K C 202                   
DBREF  6W0E A    1   219  PDB    6W0E     6W0E             1    219             
DBREF  6W0E B    1   212  PDB    6W0E     6W0E             1    212             
DBREF  6W0E C   28   120  UNP    P0A334   KCSA_STRLI      28    120             
SEQRES   1 A  219  GLN VAL GLN LEU GLN GLN PRO GLY ALA GLU LEU VAL LYS          
SEQRES   2 A  219  PRO GLY ALA SER VAL LYS LEU SER CYS LYS ALA SER GLY          
SEQRES   3 A  219  TYR THR PHE THR SER ASP TRP ILE HIS TRP VAL LYS GLN          
SEQRES   4 A  219  ARG PRO GLY HIS GLY LEU GLU TRP ILE GLY GLU ILE ILE          
SEQRES   5 A  219  PRO SER TYR GLY ARG ALA ASN TYR ASN GLU LYS ILE GLN          
SEQRES   6 A  219  LYS LYS ALA THR LEU THR ALA ASP LYS SER SER SER THR          
SEQRES   7 A  219  ALA PHE MET GLN LEU SER SER LEU THR SER GLU ASP SER          
SEQRES   8 A  219  ALA VAL TYR TYR CYS ALA ARG GLU ARG GLY ASP GLY TYR          
SEQRES   9 A  219  PHE ALA VAL TRP GLY ALA GLY THR THR VAL THR VAL SER          
SEQRES  10 A  219  SER ALA LYS THR THR PRO PRO SER VAL TYR PRO LEU ALA          
SEQRES  11 A  219  PRO GLY SER ALA ALA GLN THR ASN SER MET VAL THR LEU          
SEQRES  12 A  219  GLY CYS LEU VAL LYS GLY TYR PHE PRO GLU PRO VAL THR          
SEQRES  13 A  219  VAL THR TRP ASN SER GLY SER LEU SER SER GLY VAL HIS          
SEQRES  14 A  219  THR PHE PRO ALA VAL LEU GLN SER ASP LEU TYR THR LEU          
SEQRES  15 A  219  SER SER SER VAL THR VAL PRO SER SER SER TRP PRO SER          
SEQRES  16 A  219  GLU THR VAL THR CYS ASN VAL ALA HIS PRO ALA SER SER          
SEQRES  17 A  219  THR LYS VAL ASP LYS LYS ILE VAL PRO ARG ASP                  
SEQRES   1 B  212  ASP ILE LEU LEU THR GLN SER PRO ALA ILE LEU SER VAL          
SEQRES   2 B  212  SER PRO GLY GLU ARG VAL SER PHE SER CYS ARG ALA SER          
SEQRES   3 B  212  GLN SER ILE GLY THR ASP ILE HIS TRP TYR GLN GLN ARG          
SEQRES   4 B  212  THR ASN GLY SER PRO ARG LEU LEU ILE LYS TYR ALA SER          
SEQRES   5 B  212  GLU SER ILE SER GLY ILE PRO SER ARG PHE SER GLY SER          
SEQRES   6 B  212  GLY SER GLY THR ASP PHE THR LEU SER ILE ASN SER VAL          
SEQRES   7 B  212  GLU SER GLU ASP ILE ALA ASN TYR TYR CYS GLN GLN SER          
SEQRES   8 B  212  ASN ARG TRP PRO PHE THR PHE GLY SER GLY THR LYS LEU          
SEQRES   9 B  212  GLU ILE LYS ARG ALA ASP ALA ALA PRO THR VAL SER ILE          
SEQRES  10 B  212  PHE PRO PRO SER SER GLU GLN LEU THR SER GLY GLY ALA          
SEQRES  11 B  212  SER VAL VAL CYS PHE LEU ASN ASN PHE TYR PRO LYS ASP          
SEQRES  12 B  212  ILE ASN VAL LYS TRP LYS ILE ASP GLY SER GLU ARG GLN          
SEQRES  13 B  212  ASN GLY VAL LEU ASN SER TRP THR ASP GLN ASP SER LYS          
SEQRES  14 B  212  ASP SER THR TYR SER MET SER SER THR LEU THR LEU THR          
SEQRES  15 B  212  LYS ASP GLU TYR GLU ARG HIS ASN SER TYR THR CYS GLU          
SEQRES  16 B  212  ALA THR HIS LYS THR SER THR SER PRO ILE VAL LYS SER          
SEQRES  17 B  212  PHE ASN ARG ASN                                              
SEQRES   1 C   93  ALA ALA GLY ALA ALA THR VAL LEU LEU VAL ILE VAL LEU          
SEQRES   2 C   93  LEU ALA GLY SER TYR LEU ALA VAL LEU ALA GLU ARG GLY          
SEQRES   3 C   93  ALA PRO GLY ALA GLN LEU ILE THR TYR PRO ARG ALA LEU          
SEQRES   4 C   93  TRP TRP SER VAL GLU THR ALA THR THR VAL GLY TYR GLY          
SEQRES   5 C   93  ASP LEU TYR PRO VAL THR LEU TRP GLY ARG LEU VAL ALA          
SEQRES   6 C   93  VAL VAL VAL MET VAL ALA GLY ILE THR SER PHE GLY LEU          
SEQRES   7 C   93  VAL THR ALA ALA LEU ALA THR TRP PHE VAL GLY ARG GLU          
SEQRES   8 C   93  GLN GLU                                                      
HET     BA  C 201       1                                                       
HET      K  C 202       1                                                       
HETNAM      BA BARIUM ION                                                       
HETNAM       K POTASSIUM ION                                                    
FORMUL   4   BA    BA 2+                                                        
FORMUL   5    K    K 1+                                                         
FORMUL   6  HOH   *5(H2 O)                                                      
HELIX    1 AA1 THR A   87  SER A   91  5                                   5    
HELIX    2 AA2 SER A  161  SER A  163  5                                   3    
HELIX    3 AA3 GLU B   79  ILE B   83  5                                   5    
HELIX    4 AA4 SER B  121  THR B  126  1                                   6    
HELIX    5 AA5 THR B  182  ARG B  188  1                                   7    
HELIX    6 AA6 GLY C   30  ARG C   52  1                                  23    
HELIX    7 AA7 THR C   61  THR C   74  1                                  14    
HELIX    8 AA8 THR C   85  GLU C  120  1                                  36    
SHEET    1 AA1 4 LEU A   4  GLN A   5  0                                        
SHEET    2 AA1 4 VAL A  18  ALA A  24 -1  O  LYS A  23   N  GLN A   5           
SHEET    3 AA1 4 THR A  78  LEU A  83 -1  O  LEU A  83   N  VAL A  18           
SHEET    4 AA1 4 ALA A  68  ALA A  72 -1  N  THR A  69   O  GLN A  82           
SHEET    1 AA2 6 ALA A   9  VAL A  12  0                                        
SHEET    2 AA2 6 THR A 112  VAL A 116  1  O  THR A 113   N  GLU A  10           
SHEET    3 AA2 6 VAL A  93  GLU A  99 -1  N  TYR A  94   O  THR A 112           
SHEET    4 AA2 6 TRP A  33  GLN A  39 -1  N  HIS A  35   O  ALA A  97           
SHEET    5 AA2 6 GLU A  46  ILE A  51 -1  O  GLU A  46   N  LYS A  38           
SHEET    6 AA2 6 ALA A  58  TYR A  60 -1  O  ASN A  59   N  GLU A  50           
SHEET    1 AA3 4 ALA A   9  VAL A  12  0                                        
SHEET    2 AA3 4 THR A 112  VAL A 116  1  O  THR A 113   N  GLU A  10           
SHEET    3 AA3 4 VAL A  93  GLU A  99 -1  N  TYR A  94   O  THR A 112           
SHEET    4 AA3 4 PHE A 105  TRP A 108 -1  O  VAL A 107   N  ARG A  98           
SHEET    1 AA4 4 SER A 125  LEU A 129  0                                        
SHEET    2 AA4 4 MET A 140  TYR A 150 -1  O  LEU A 146   N  TYR A 127           
SHEET    3 AA4 4 TYR A 180  PRO A 189 -1  O  TYR A 180   N  TYR A 150           
SHEET    4 AA4 4 HIS A 169  THR A 170 -1  N  HIS A 169   O  SER A 185           
SHEET    1 AA5 4 SER A 125  LEU A 129  0                                        
SHEET    2 AA5 4 MET A 140  TYR A 150 -1  O  LEU A 146   N  TYR A 127           
SHEET    3 AA5 4 TYR A 180  PRO A 189 -1  O  TYR A 180   N  TYR A 150           
SHEET    4 AA5 4 VAL A 174  LEU A 175 -1  N  VAL A 174   O  THR A 181           
SHEET    1 AA6 3 THR A 156  TRP A 159  0                                        
SHEET    2 AA6 3 THR A 199  HIS A 204 -1  O  ASN A 201   N  THR A 158           
SHEET    3 AA6 3 THR A 209  LYS A 214 -1  O  LYS A 213   N  CYS A 200           
SHEET    1 AA7 4 LEU B   4  THR B   5  0                                        
SHEET    2 AA7 4 VAL B  19  ALA B  25 -1  O  ARG B  24   N  THR B   5           
SHEET    3 AA7 4 ASP B  70  ILE B  75 -1  O  PHE B  71   N  CYS B  23           
SHEET    4 AA7 4 PHE B  62  SER B  67 -1  N  SER B  63   O  SER B  74           
SHEET    1 AA8 6 ILE B  10  LEU B  11  0                                        
SHEET    2 AA8 6 THR B 102  LEU B 104  1  O  LYS B 103   N  LEU B  11           
SHEET    3 AA8 6 ASN B  85  CYS B  88 -1  N  TYR B  86   O  THR B 102           
SHEET    4 AA8 6 TRP B  35  GLN B  38 -1  N  GLN B  38   O  ASN B  85           
SHEET    5 AA8 6 ARG B  45  LYS B  49 -1  O  LEU B  47   N  TRP B  35           
SHEET    6 AA8 6 GLU B  53  SER B  54 -1  O  GLU B  53   N  LYS B  49           
SHEET    1 AA9 4 THR B 114  PHE B 118  0                                        
SHEET    2 AA9 4 VAL B 133  PHE B 139 -1  O  ASN B 137   N  THR B 114           
SHEET    3 AA9 4 TYR B 173  LEU B 179 -1  O  MET B 175   N  LEU B 136           
SHEET    4 AA9 4 VAL B 159  TRP B 163 -1  N  LEU B 160   O  THR B 178           
SHEET    1 AB1 3 ILE B 144  LYS B 149  0                                        
SHEET    2 AB1 3 SER B 191  HIS B 198 -1  O  GLU B 195   N  LYS B 147           
SHEET    3 AB1 3 SER B 201  ASN B 210 -1  O  ILE B 205   N  ALA B 196           
SSBOND   1 CYS A   22    CYS A   96                          1555   1555  2.05  
SSBOND   2 CYS A  145    CYS A  200                          1555   1555  2.04  
SSBOND   3 CYS B  134    CYS B  194                          1555   1555  2.04  
LINK         O   THR C  75                BA    BA C 201     1555   1555  2.82  
LINK         O   THR C  75                BA    BA C 201     1555   2555  2.82  
LINK         O   GLY C  77                 K     K C 202     1555   1555  2.10  
LINK         O   GLY C  77                 K     K C 202     1555   2555  2.10  
LINK        BA    BA C 201                 O   HOH C 303     1555   1555  2.57  
LINK        BA    BA C 201                 O   HOH C 303     1555   2555  2.57  
CISPEP   1 PHE A  151    PRO A  152          0        -5.26                     
CISPEP   2 GLU A  153    PRO A  154          0        -0.83                     
CISPEP   3 TRP A  193    PRO A  194          0         1.80                     
CISPEP   4 SER B    7    PRO B    8          0        -0.87                     
CISPEP   5 TRP B   94    PRO B   95          0        -0.81                     
CISPEP   6 TYR B  140    PRO B  141          0         0.44                     
SITE     1 AC1  2 THR C  75  HOH C 303                                          
SITE     1 AC2  1 GLY C  77                                                     
CRYST1  158.283  158.283   74.207  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      0.006318  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.006318  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.013476        0.00000