HEADER    MEMBRANE PROTEIN                        
COMPND    MOL_ID: 1;                                                  
COMPND   2 MOLECULE: ANTIBODY FAB FRAGMENT HEAVY CHAIN;               
COMPND   3 CHAIN: A;                                                  
COMPND   4 MOL_ID: 2;                                                 
COMPND   5 MOLECULE: ANTIBODY FAB FRAGMENT LIGHT CHAIN;               
COMPND   6 CHAIN: B;                                                  
COMPND   7 MOL_ID: 3;                                                 
COMPND   8 MOLECULE: POTASSIUM CHANNEL KCSA;                          
COMPND   9 CHAIN: C;                                                  
COMPND  10 FRAGMENT: POTASSIUM CHANNEL KCSA;                          
COMPND  11 ENGINEERED: YES;                                           
COMPND  12 MUTATION: YES                                              
SOURCE    MOL_ID: 1;                                                  
SOURCE   2 ORGANISM_SCIENTIFIC: MUS MUSCULUS;                         
SOURCE   3 ORGANISM_COMMON: MOUSE;                                    
SOURCE   4 MOL_ID: 2;                                                 
SOURCE   5 ORGANISM_SCIENTIFIC: MUS MUSCULUS;                         
SOURCE   6 ORGANISM_COMMON: MOUSE;                                    
SOURCE   7 MOL_ID: 3;                                                 
SOURCE   8 ORGANISM_SCIENTIFIC: STREPTOMYCES LIVIDANS;                
SOURCE   9 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                       
SOURCE  10 EXPRESSION_SYSTEM_COMMON: BACTERIA                         
RESOLUTION  SOURCE               : CHESS                      
AUTHOR    Y.ZHOU,J.H.MORAIS-CABRAL,A.KAUFMAN,R.MACKINNON              
RESOLUTION     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-      
EXPDTA    X-RAY DIFFRACTION                                           
JRNL        AUTH   Y.ZHOU,J.H.MORAIS-CABRAL,A.KAUFMAN,R.MACKINNON     
JRNL        TITL   CHEMISTRY OF ION COORDINATION AND HYDRATION        
JRNL        TITL 2 REVEALED BY A K+ CHANNEL-FAB COMPLEX AT 2.0 A      
JRNL        TITL 3 RESOLUTION                                         
JRNL        REF    NATURE                        V. 414    43 2001    
JRNL        REFN   ASTM NATUAS  UK ISSN 0028-0836                     
RESOLUTION   2.00 ANGSTROMS.                                  



 Sequence in PIR format: 
>P1;1k4cC
 structureX:1k4cC:  22 :C: 124 :C:potassium channel kcsa:streptomyces lividans: 9.99: 9.99
 SALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRCVAVVVM
 VAGITSFGLVTAALATWFVGREQERRGH*




 View SSTRUC file for 1k4cC 
 Rasmol View of  1k4cC