HEADER    TRANSPORT PROTEIN                       15-MAY-14   4QE9              
TITLE     OPEN MTHK PORE STRUCTURE SOAKED IN 10 MM BA2+/100 MM K+               
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CALCIUM-GATED POTASSIUM CHANNEL MTHK;                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 18-100;                                       
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: METHANOTHERMOBACTER THERMAUTOTROPHICUS;         
SOURCE   3 ORGANISM_TAXID: 187420;                                              
SOURCE   4 STRAIN: ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / DELTA H;   
SOURCE   5 GENE: MTHK, MTH_1520;                                                
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    TRANSMEMBRANE, ION CHANNEL, OPEN CONFORMATION, TRANSPORT PROTEIN      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.GUO,W.ZENG,H.CUI,L.CHEN,S.YE                                        
REVDAT   3   08-NOV-23 4QE9    1       REMARK SEQADV LINK                       
REVDAT   2   10-DEC-14 4QE9    1       JRNL                                     
REVDAT   1   09-JUL-14 4QE9    0                                                
JRNL        AUTH   R.GUO,W.ZENG,H.CUI,L.CHEN,S.YE                               
JRNL        TITL   IONIC INTERACTIONS OF BA2+ BLOCKADES IN THE MTHK K+ CHANNEL  
JRNL        REF    J.GEN.PHYSIOL.                V. 144   193 2014              
JRNL        REFN                   ISSN 0022-1295                               
JRNL        PMID   25024268                                                     
JRNL        DOI    10.1085/JGP.201411192                                        
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.15 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.2.0019                                      
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.15                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.50                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 100.0                          
REMARK   3   NUMBER OF REFLECTIONS             : 4389                           
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 + TEST SET) : 0.204                           
REMARK   3   R VALUE            (WORKING SET) : 0.198                           
REMARK   3   FREE R VALUE                     : 0.257                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.800                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 478                             
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.15                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.21                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 322                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 100.0                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2430                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 31                           
REMARK   3   BIN FREE R VALUE                    : 0.4090                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 648                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 6                                       
REMARK   3   SOLVENT ATOMS            : 43                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 51.79                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -0.69000                                             
REMARK   3    B22 (A**2) : -0.69000                                             
REMARK   3    B33 (A**2) : 1.39000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.291         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.228         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.139         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 10.884        
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.954                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.910                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):   667 ; 0.010 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):   916 ; 1.149 ; 1.950       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):    82 ; 4.596 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):    23 ;23.916 ;21.739       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):    95 ;14.110 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     2 ;10.260 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   113 ; 0.078 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):   488 ; 0.004 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   361 ; 0.225 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):   488 ; 0.315 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):    40 ; 0.144 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     1 ; 0.001 ; 0.200       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    77 ; 0.451 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     6 ; 0.138 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):     3 ; 0.001 ; 0.200       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):   409 ; 0.523 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):   667 ; 0.984 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   263 ; 1.399 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   249 ; 2.188 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 3                                          
REMARK   3                                                                      
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A    19        A    42                          
REMARK   3    ORIGIN FOR THE GROUP (A):  11.9353  -4.2624  20.2995              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:  -0.0976 T22:  -0.0735                                     
REMARK   3      T33:   0.0007 T12:  -0.0251                                     
REMARK   3      T13:   0.0133 T23:  -0.0160                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   1.5030 L22:   2.7699                                     
REMARK   3      L33:  19.1667 L12:   1.1551                                     
REMARK   3      L13:  -2.5794 L23:  -2.8934                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.1302 S12:  -0.0728 S13:   0.2861                       
REMARK   3      S21:   0.1057 S22:  -0.1648 S23:   0.3711                       
REMARK   3      S31:   0.4777 S32:   0.7595 S33:   0.0346                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 2                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A    43        A    69                          
REMARK   3    ORIGIN FOR THE GROUP (A):  19.6274  -3.8643  10.4169              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:  -0.0150 T22:  -0.0521                                     
REMARK   3      T33:  -0.0583 T12:  -0.0351                                     
REMARK   3      T13:   0.0036 T23:  -0.0071                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.7239 L22:   0.8452                                     
REMARK   3      L33:   2.3084 L12:  -0.9992                                     
REMARK   3      L13:   0.4684 L23:  -1.2045                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.0064 S12:   0.1123 S13:  -0.1588                       
REMARK   3      S21:  -0.0365 S22:   0.0269 S23:   0.0703                       
REMARK   3      S31:   0.0662 S32:  -0.1076 S33:  -0.0205                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 3                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A    70        A    99                          
REMARK   3    ORIGIN FOR THE GROUP (A):  19.8018  -1.9727  23.5661              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:  -0.0550 T22:   0.0001                                     
REMARK   3      T33:  -0.0663 T12:   0.0039                                     
REMARK   3      T13:   0.0279 T23:   0.0132                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.5503 L22:  11.8647                                     
REMARK   3      L33:  17.0080 L12:  -4.9660                                     
REMARK   3      L13:   6.4263 L23: -14.1309                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.1016 S12:  -0.3966 S13:  -0.1351                       
REMARK   3      S21:   0.0788 S22:   0.2381 S23:   0.3776                       
REMARK   3      S31:  -0.0641 S32:  -0.3781 S33:  -0.3397                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.20                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 4QE9 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 20-MAY-14.                  
REMARK 100 THE DEPOSITION ID IS D_1000085944.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 01-JUN-13                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 7.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SSRF                               
REMARK 200  BEAMLINE                       : BL17U                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9786                             
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 : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-2000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 4888                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.150                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.4                               
REMARK 200  DATA REDUNDANCY                : 10.50                              
REMARK 200  R MERGE                    (I) : 0.10500                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 26.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
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: PHASES                                                
REMARK 200 STARTING MODEL: PDB ENTRY 3LDC                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 46.19                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.29                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 3.0-3.5M 1,6-HEXANDIOL, 100MM HEPES,     
REMARK 280  PH 7.5, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K             
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 4 21 2                         
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+1/2,X+1/2,Z                                          
REMARK 290       4555   Y+1/2,-X+1/2,Z                                          
REMARK 290       5555   -X+1/2,Y+1/2,-Z                                         
REMARK 290       6555   X+1/2,-Y+1/2,-Z                                         
REMARK 290       7555   Y,X,-Z                                                  
REMARK 290       8555   -Y,-X,-Z                                                
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000       30.50250            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       30.50250            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       30.50250            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       30.50250            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       30.50250            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       30.50250            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       30.50250            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       30.50250            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000        0.00000            
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        0.00000            
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        0.00000            
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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 6080 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 15470 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -72.0 KCAL/MOL                        
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 -1.000000  0.000000  0.000000       61.00500            
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       30.50250            
REMARK 350   BIOMT2   3  1.000000  0.000000  0.000000      -30.50250            
REMARK 350   BIOMT3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   4  0.000000  1.000000  0.000000       30.50250            
REMARK 350   BIOMT2   4 -1.000000  0.000000  0.000000       30.50250            
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 K      K A 201  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K A 202  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K A 203  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K A 204  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K A 205  LIES ON A SPECIAL POSITION.                          
REMARK 375 K      K A 206  LIES ON A SPECIAL POSITION.                          
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                               K A 203   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 THR A  59   O                                                      
REMARK 620 2 VAL A  60   O    70.9                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K A 204   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 THR A  59   OG1                                                    
REMARK 620 2 THR A  59   O    58.0                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K A 202   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 VAL A  60   O                                                      
REMARK 620 2 GLY A  61   O    69.4                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K A 201   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLY A  61   O                                                      
REMARK 620 2 TYR A  62   O    70.3                                              
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 K A 201                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 202                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 203                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 204                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 206                   
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 3LDC   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 3LDD   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 3LDE   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4QE7   RELATED DB: PDB                                   
DBREF  4QE9 A   18   100  UNP    O27564   MTHK_METTH      18    100             
SEQADV 4QE9 HIS A   68  UNP  O27564    SER    68 ENGINEERED MUTATION            
SEQADV 4QE9 CYS A   77  UNP  O27564    VAL    77 ENGINEERED MUTATION            
SEQRES   1 A   83  VAL PRO ALA THR ARG ILE LEU LEU LEU VAL LEU ALA VAL          
SEQRES   2 A   83  ILE ILE TYR GLY THR ALA GLY PHE HIS PHE ILE GLU GLY          
SEQRES   3 A   83  GLU SER TRP THR VAL SER LEU TYR TRP THR PHE VAL THR          
SEQRES   4 A   83  ILE ALA THR VAL GLY TYR GLY ASP TYR SER PRO HIS THR          
SEQRES   5 A   83  PRO LEU GLY MET TYR PHE THR CYS THR LEU ILE VAL LEU          
SEQRES   6 A   83  GLY ILE GLY THR PHE ALA VAL ALA VAL GLU ARG LEU LEU          
SEQRES   7 A   83  GLU PHE LEU ILE ASN                                          
HET      K  A 201       1                                                       
HET      K  A 202       1                                                       
HET      K  A 203       1                                                       
HET      K  A 204       1                                                       
HET      K  A 205       1                                                       
HET      K  A 206       1                                                       
HETNAM       K POTASSIUM ION                                                    
FORMUL   2    K    6(K 1+)                                                      
FORMUL   8  HOH   *43(H2 O)                                                     
HELIX    1   1 PRO A   19  GLY A   43  1                                  25    
HELIX    2   2 SER A   45  ALA A   58  1                                  14    
HELIX    3   3 THR A   69  ASN A  100  1                                  32    
LINK         O   THR A  59                 K     K A 203     1555   1555  2.89  
LINK         OG1 THR A  59                 K     K A 204     1555   1555  2.84  
LINK         O   THR A  59                 K     K A 204     1555   1555  3.07  
LINK         O   VAL A  60                 K     K A 202     1555   1555  2.95  
LINK         O   VAL A  60                 K     K A 203     1555   1555  2.91  
LINK         O   GLY A  61                 K     K A 201     1555   1555  3.04  
LINK         O   GLY A  61                 K     K A 202     1555   1555  2.82  
LINK         O   TYR A  62                 K     K A 201     1555   1555  3.03  
LINK         K     K A 206                 O   HOH A 341     1555   1555  2.79  
SITE     1 AC1  3 GLY A  61  TYR A  62    K A 202                               
SITE     1 AC2  4 VAL A  60  GLY A  61    K A 201    K A 203                    
SITE     1 AC3  4 THR A  59  VAL A  60    K A 202    K A 204                    
SITE     1 AC4  3 THR A  59    K A 203    K A 206                               
SITE     1 AC5  3 THR A  59    K A 204  HOH A 341                               
CRYST1   61.005   61.005   44.950  90.00  90.00  90.00 P 4 21 2      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      0.016392  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.016392  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.022247        0.00000