HEADER    TRANSPORT PROTEIN                       15-MAY-14   4QE7              
TITLE     OPEN MTHK PORE STRUCTURE SOAKED IN 10 MM BA2+/100 MM NA+              
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CALCIUM-GATED POTASSIUM CHANNEL MTHK;                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 19-99;                                        
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 4QE7    1       REMARK SEQADV LINK                       
REVDAT   2   10-DEC-14 4QE7    1       JRNL                                     
REVDAT   1   09-JUL-14 4QE7    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.    2.40 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) : 2.40                           
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             : 3231                           
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) : 0.225                           
REMARK   3   R VALUE            (WORKING SET) : 0.221                           
REMARK   3   FREE R VALUE                     : 0.265                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 323                             
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) : 2.40                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.46                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 208                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 100.0                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3110                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 19                           
REMARK   3   BIN FREE R VALUE                    : 0.2640                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 633                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 3                                       
REMARK   3   SOLVENT ATOMS            : 28                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 67.42                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -2.38000                                             
REMARK   3    B22 (A**2) : -2.38000                                             
REMARK   3    B33 (A**2) : 4.76000                                              
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): 0.588         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.297         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.211         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 18.629        
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.945                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.932                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):   652 ; 0.009 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):   894 ; 1.127 ; 1.948       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):    80 ; 4.689 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):    22 ;20.066 ;21.364       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):    93 ;14.545 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     2 ;22.811 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   110 ; 0.076 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):   472 ; 0.004 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   324 ; 0.208 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):   474 ; 0.310 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):    26 ; 0.123 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    56 ; 0.279 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     4 ; 0.118 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
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):   399 ; 0.339 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):   649 ; 0.649 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   260 ; 1.034 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   245 ; 1.699 ; 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):  11.9182  -4.2817  20.4694              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.0072 T22:  -0.0017                                     
REMARK   3      T33:   0.0668 T12:  -0.0226                                     
REMARK   3      T13:  -0.0153 T23:   0.0038                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   1.6425 L22:   2.0567                                     
REMARK   3      L33:  17.0339 L12:   0.9555                                     
REMARK   3      L13:  -4.7346 L23:  -0.5001                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.0588 S12:  -0.1300 S13:   0.1954                       
REMARK   3      S21:   0.1328 S22:   0.0121 S23:   0.1386                       
REMARK   3      S31:   0.3013 S32:   0.7604 S33:  -0.0709                       
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):  19.6201  -3.8880  10.5944              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.0525 T22:  -0.0074                                     
REMARK   3      T33:   0.0322 T12:  -0.0404                                     
REMARK   3      T13:  -0.0327 T23:  -0.0279                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   2.7949 L22:   0.4122                                     
REMARK   3      L33:   5.3269 L12:  -0.7508                                     
REMARK   3      L13:  -0.7289 L23:  -0.8441                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.0410 S12:  -0.0238 S13:  -0.0383                       
REMARK   3      S21:  -0.0038 S22:  -0.0787 S23:  -0.0507                       
REMARK   3      S31:   0.1304 S32:  -0.0577 S33:   0.0377                       
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):  19.7961  -1.9758  23.7287              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.0561 T22:   0.0837                                     
REMARK   3      T33:  -0.0200 T12:  -0.0485                                     
REMARK   3      T13:   0.0706 T23:   0.0325                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   4.0583 L22:  14.7124                                     
REMARK   3      L33:  18.4833 L12:  -4.8462                                     
REMARK   3      L13:   6.0324 L23: -15.0666                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.0222 S12:  -0.5291 S13:  -0.1329                       
REMARK   3      S21:   0.5588 S22:   0.1134 S23:   0.4201                       
REMARK   3      S31:  -0.0676 S32:  -0.3617 S33:  -0.1357                       
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 4QE7 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_1000085942.                                   
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   : 3576                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.400                              
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     (%) : 97.5                               
REMARK 200  DATA REDUNDANCY                : 11.80                              
REMARK 200  R MERGE                    (I) : 0.09200                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 41.2000                            
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   (%): 47.86                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.36                     
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       30.49900            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       30.49900            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       30.49900            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       30.49900            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       30.49900            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       30.49900            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       30.49900            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       30.49900            
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: 7580 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 14210 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -130.0 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       60.99800            
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       30.49900            
REMARK 350   BIOMT2   3  1.000000  0.000000  0.000000      -30.49900            
REMARK 350   BIOMT3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   4  0.000000  1.000000  0.000000       30.49900            
REMARK 350   BIOMT2   4 -1.000000  0.000000  0.000000       30.49900            
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 A 101  LIES ON A SPECIAL POSITION.                          
REMARK 375 BA    BA A 102  LIES ON A SPECIAL POSITION.                          
REMARK 375 BA    BA A 103  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 201  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 202  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                              BA A 102  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 THR A  59   O                                                      
REMARK 620 2 VAL A  60   O    69.5                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              BA A 103  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 THR A  59   OG1                                                    
REMARK 620 2 THR A  59   O    55.4                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              BA A 101  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 VAL A  60   O                                                      
REMARK 620 2 GLY A  61   O    63.1                                              
REMARK 620 3 HOH A 201   O   116.6  62.2                                        
REMARK 620 N                    1     2                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BA A 101                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BA A 102                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BA A 103                  
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: 4QE9   RELATED DB: PDB                                   
DBREF  4QE7 A   19    99  UNP    O27564   MTHK_METTH      19     99             
SEQADV 4QE7 HIS A   68  UNP  O27564    SER    68 ENGINEERED MUTATION            
SEQADV 4QE7 CYS A   77  UNP  O27564    VAL    77 ENGINEERED MUTATION            
SEQRES   1 A   81  PRO ALA THR ARG ILE LEU LEU LEU VAL LEU ALA VAL ILE          
SEQRES   2 A   81  ILE TYR GLY THR ALA GLY PHE HIS PHE ILE GLU GLY GLU          
SEQRES   3 A   81  SER TRP THR VAL SER LEU TYR TRP THR PHE VAL THR ILE          
SEQRES   4 A   81  ALA THR VAL GLY TYR GLY ASP TYR SER PRO HIS THR PRO          
SEQRES   5 A   81  LEU GLY MET TYR PHE THR CYS THR LEU ILE VAL LEU GLY          
SEQRES   6 A   81  ILE GLY THR PHE ALA VAL ALA VAL GLU ARG LEU LEU GLU          
SEQRES   7 A   81  PHE LEU ILE                                                  
HET     BA  A 101       1                                                       
HET     BA  A 102       1                                                       
HET     BA  A 103       1                                                       
HETNAM      BA BARIUM ION                                                       
FORMUL   2   BA    3(BA 2+)                                                     
FORMUL   5  HOH   *28(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  ILE A   99  1                                  31    
LINK         O   THR A  59                BA    BA A 102     1555   1555  3.01  
LINK         OG1 THR A  59                BA    BA A 103     1555   1555  2.98  
LINK         O   THR A  59                BA    BA A 103     1555   1555  3.01  
LINK         O   VAL A  60                BA    BA A 101     1555   1555  3.03  
LINK         O   VAL A  60                BA    BA A 102     1555   1555  3.12  
LINK         O   GLY A  61                BA    BA A 101     1555   1555  2.91  
LINK        BA    BA A 101                 O   HOH A 201     1555   1555  2.94  
SITE     1 AC1  4 VAL A  60  GLY A  61   BA A 102  HOH A 201                    
SITE     1 AC2  4 THR A  59  VAL A  60   BA A 101   BA A 103                    
SITE     1 AC3  2 THR A  59   BA A 102                                          
CRYST1   60.998   60.998   45.320  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      0.016394  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.016394  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.022065        0.00000