HEADER    TOXIN                                   16-APR-02   1LGL              
TITLE     SOLUTION STRUCTURE OF HERG-SPECIFIC SCORPION TOXIN BEKM-1             
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: BEKM-1 TOXIN;                                              
COMPND   3 CHAIN: A;                                                            
COMPND   4 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: MESOBUTHUS EUPEUS;                              
SOURCE   3 ORGANISM_COMMON: LESSER ASIAN SCORPION;                              
SOURCE   4 ORGANISM_TAXID: 34648;                                               
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: HB101;                                     
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PEZZ18                                    
KEYWDS    ALPHA-BETA MOTIF, CYSTEINE-KNOT MOTIF, TOXIN                          
EXPDTA    SOLUTION NMR                                                          
NUMMDL    20                                                                    
AUTHOR    Y.V.KOROLOKOVA,E.V.BOCHAROV,K.ANGELO,I.V.MASLENNIKOV,O.V.GRINENKO,    
AUTHOR   2 A.V.LIPKIN,E.D.NOSIREVA,K.A.PLUZHNIKOV,S.-P.OLESEN,A.S.ARSENIEV,     
AUTHOR   3 E.V.GRISHIN                                                          
REVDAT   4   06-NOV-24 1LGL    1       REMARK                                   
REVDAT   3   23-FEB-22 1LGL    1       REMARK                                   
REVDAT   2   24-FEB-09 1LGL    1       VERSN                                    
REVDAT   1   20-NOV-02 1LGL    0                                                
JRNL        AUTH   Y.V.KOROLKOVA,E.V.BOCHAROV,K.ANGELO,I.V.MASLENNIKOV,         
JRNL        AUTH 2 O.V.GRINENKO,A.V.LIPKIN,E.D.NOSYREVA,K.A.PLUZHNIKOV,         
JRNL        AUTH 3 S.P.OLESEN,A.S.ARSENIEV,E.V.GRISHIN                          
JRNL        TITL   NEW BINDING SITE ON COMMON MOLECULAR SCAFFOLD PROVIDES HERG  
JRNL        TITL 2 CHANNEL SPECIFICITY OF SCORPION TOXIN BEKM-1.                
JRNL        REF    J.BIOL.CHEM.                  V. 277 43104 2002              
JRNL        REFN                   ISSN 0021-9258                               
JRNL        PMID   12151390                                                     
JRNL        DOI    10.1074/JBC.M204083200                                       
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   Y.V.KOROLKOVA,S.A.KOZLOV,A.V.LIPKIN,K.A.PLUZHNIKOV,          
REMARK   1  AUTH 2 J.K.HADLEY,A.K.FILIPPOV,D.A.BROWN,K.ANGELO,D.STROBEK,        
REMARK   1  AUTH 3 T.JESPERSEN,S.P.OLESEN,B.S.JENSEN,E.V.GRISHIN                
REMARK   1  TITL   AN ERG CHANNEL INHIBITOR FROM THE SCORPION BUTHUS EUPEUS     
REMARK   1  REF    J.BIOL.CHEM.                  V. 276  9868 2001              
REMARK   1  REFN                   ISSN 0021-9258                               
REMARK   1  DOI    10.1074/JBC.M005973200                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION. NOT APPLICABLE.                                          
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : VNMR 5.3B, FANTOM 4                                  
REMARK   3   AUTHORS     : VARIAN (VNMR), SCHAUMANN (FANTOM)                    
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS:                                           
REMARK   3  THE STRUCTURES ARE BASED ON A TOTAL OF 653 RESTRAINTS:              
REMARK   3  326/67 ARE NOE-DERIVED UPPER/LOWER DISTANCE CONSTRAINTS,            
REMARK   3  68/46 BACKBONE/SIDECHAIN DIHEDRAL ANGLE RESTRAINTS,                 
REMARK   3  64/64 UPPER/LOWER DISTANCE RESTRAINTS FROM 23 (18 BB-BB, 5 BB-SC)   
REMARK   3  HYDROGEN BONDS,                                                     
REMARK   3  9/9 UPPER/LOWER DISTANCE RESTRAINTS FROM 3 SS-BONDS.                
REMARK   4                                                                      
REMARK   4 1LGL COMPLIES WITH FORMAT V. 3.15, 01-DEC-08                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 17-APR-02.                  
REMARK 100 THE DEPOSITION ID IS D_1000015932.                                   
REMARK 210                                                                      
REMARK 210 EXPERIMENTAL DETAILS                                                 
REMARK 210  EXPERIMENT TYPE                : NMR                                
REMARK 210  TEMPERATURE           (KELVIN) : 303                                
REMARK 210  PH                             : 3.5                                
REMARK 210  IONIC STRENGTH                 : 0                                  
REMARK 210  PRESSURE                       : AMBIENT                            
REMARK 210  SAMPLE CONTENTS                : 1 MM BEKM-1, 90% H2O, 10% D2O; 1   
REMARK 210                                   MM BEKM-1, 99.9% D2O               
REMARK 210                                                                      
REMARK 210  NMR EXPERIMENTS CONDUCTED      : DQF-COSY; 2D TOCSY; 2D NOESY       
REMARK 210  SPECTROMETER FIELD STRENGTH    : 600 MHZ                            
REMARK 210  SPECTROMETER MODEL             : UNITY                              
REMARK 210  SPECTROMETER MANUFACTURER      : VARIAN                             
REMARK 210                                                                      
REMARK 210  STRUCTURE DETERMINATION.                                            
REMARK 210   SOFTWARE USED                 : VNMR 5.3B, XEASY 1.2.11, DYANA     
REMARK 210                                   1.5                                
REMARK 210   METHOD USED                   : SIMULATED ANNEALING COMBINED       
REMARK 210                                   WITH TORSION ANGLE DYNAMICS        
REMARK 210                                                                      
REMARK 210 CONFORMERS, NUMBER CALCULATED   : 200                                
REMARK 210 CONFORMERS, NUMBER SUBMITTED    : 20                                 
REMARK 210 CONFORMERS, SELECTION CRITERIA  : TARGET FUNCTION                    
REMARK 210                                                                      
REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 5                   
REMARK 210                                                                      
REMARK 210 REMARK: THIS STRUCTURE WAS DETERMINED USING STANDARD 2D              
REMARK 210  HOMONUCLEAR TECHNIQUES.                                             
REMARK 215                                                                      
REMARK 215 NMR STUDY                                                            
REMARK 215 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLUTION           
REMARK 215 NMR DATA.  PROTEIN DATA BANK CONVENTIONS REQUIRE THAT                
REMARK 215 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON              
REMARK 215 THESE RECORDS ARE MEANINGLESS.                                       
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: MONOMERIC                         
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 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  1 THR A   3     -161.28   -127.12                                   
REMARK 500  2 THR A   3     -164.54   -126.95                                   
REMARK 500  3 THR A   3     -164.29   -125.60                                   
REMARK 500  6 THR A   3     -165.06   -126.54                                   
REMARK 500  8 THR A   3     -164.67   -124.99                                   
REMARK 500 10 THR A   3     -162.36   -126.41                                   
REMARK 500 12 THR A   3     -162.14   -123.47                                   
REMARK 500 15 THR A   3     -164.11   -126.62                                   
REMARK 500 16 THR A   3     -164.44   -123.98                                   
REMARK 500 18 THR A   3     -159.58   -126.98                                   
REMARK 500 20 THR A   3     -159.61   -129.39                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500 10 ARG A  27         0.10    SIDE CHAIN                              
REMARK 500 15 ARG A  27         0.11    SIDE CHAIN                              
REMARK 500 16 ARG A   1         0.11    SIDE CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 5184   RELATED DB: BMRB                                  
REMARK 900 PROTON CHEMICAL SHIFTS AND COUPLING CONSTANTS OF BEKM-1              
DBREF  1LGL A    1    36  UNP    Q9BKB7   SEKM_BUTEU      22     57             
SEQRES   1 A   36  ARG PRO THR ASP ILE LYS CYS SER GLU SER TYR GLN CYS          
SEQRES   2 A   36  PHE PRO VAL CYS LYS SER ARG PHE GLY LYS THR ASN GLY          
SEQRES   3 A   36  ARG CYS VAL ASN GLY PHE CYS ASP CYS PHE                      
HELIX    1   1 GLU A    9  GLN A   12  5                                   4    
HELIX    2   2 CYS A   13  PHE A   21  1                                   9    
SHEET    1   A 3 PRO A   2  LYS A   6  0                                        
SHEET    2   A 3 PHE A  32  PHE A  36 -1  N  CYS A  33   O  ILE A   5           
SHEET    3   A 3 ASN A  25  VAL A  29 -1  O  ASN A  25   N  PHE A  36           
SSBOND   1 CYS A    7    CYS A   28                          1555   1555  2.01  
SSBOND   2 CYS A   13    CYS A   33                          1555   1555  2.18  
SSBOND   3 CYS A   17    CYS A   35                          1555   1555  1.93  
CRYST1    1.000    1.000    1.000  90.00  90.00  90.00 P 1           1          
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      1.000000  0.000000  0.000000        0.00000                         
SCALE2      0.000000  1.000000  0.000000        0.00000                         
SCALE3      0.000000  0.000000  1.000000        0.00000                         
MODEL        1