HEADER TOXIN 12-DEC-00 1HP2 TITLE SOLUTION STRUCTURE OF A TOXIN FROM THE SCORPION TITYUS SERRULATUS TITLE 2 (TSTX-K ALPHA) DETERMINED BY NMR. COMPND MOL_ID: 1; COMPND 2 MOLECULE: TITYUSTOXIN K ALPHA; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: TSTX-K ALPHA, TSK4; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: TITYUS SERRULATUS; SOURCE 3 ORGANISM_COMMON: BRAZILIAN SCORPION; SOURCE 4 ORGANISM_TAXID: 6887; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS K+ CHANNEL, SCORPION TOXIN, ALPHA-K TOXIN, TOXIN EXPDTA SOLUTION NMR NUMMDL 30 AUTHOR K.C.ELLIS,T.C.TENENHOLZ,W.F.GILLY,M.P.BLAUSTEIN,D.J.WEBER REVDAT 3 23-FEB-22 1HP2 1 REMARK REVDAT 2 24-FEB-09 1HP2 1 VERSN REVDAT 1 13-JUN-01 1HP2 0 JRNL AUTH K.C.ELLIS,T.C.TENENHOLZ,H.JERNG,M.HAYHURST,C.S.DUDLAK, JRNL AUTH 2 W.F.GILLY,M.P.BLAUSTEIN,D.J.WEBER JRNL TITL INTERACTION OF A TOXIN FROM THE SCORPION TITYUS SERRULATUS JRNL TITL 2 WITH A CLONED K+ CHANNEL FROM SQUID (SQKV1A). JRNL REF BIOCHEMISTRY V. 40 5942 2001 JRNL REFN ISSN 0006-2960 JRNL PMID 11352729 JRNL DOI 10.1021/BI010173G REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH M.P.BLAUSTEIN,R.S.ROGOWSKI,M.J.SCHNEIDER,B.K.KRUEGER REMARK 1 TITL POLYPEPTIDE TOXINS FROM THE VENOMS OF OLD WORLD AND NEW REMARK 1 TITL 2 WORLD SCORPIONS PREFERENTIALLY BLOCK DIFFERENT POTASSIUM REMARK 1 TITL 3 CHANNELS REMARK 1 REF MOL.PHARMACOL. V. 40 932 1991 REMARK 1 REFN ISSN 0026-895X REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.851 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: THESE STRUCTURES ARE BASED ON A TOTAL REMARK 3 OF 569 NOE DISTANCE CONTRAINTS, 13 DIHEDRAL ANGLE RESTRAINTS, REMARK 3 AND 16 PHI ANGLE RESTRAINTS. REMARK 4 REMARK 4 1HP2 COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-DEC-00. REMARK 100 THE DEPOSITION ID IS D_1000012493. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 310; 305; 300; 295; 290 REMARK 210 PH : 3.50; 3.50; 3.50; 3.50; 3.50 REMARK 210 IONIC STRENGTH : 1.44; 1.44; 1.44; 1.44; 1.44 REMARK 210 PRESSURE : 1 ATM; 1 ATM; 1 ATM; 1 ATM; 1 REMARK 210 ATM REMARK 210 SAMPLE CONTENTS : 4.53 MM TSTX-KA 2.2 MM D11-TRIS REMARK 210 0.1 MM EDTA 0.35 MM NAN3; 4.53 REMARK 210 MM TSTX-KA 2.2 MM D11-TRIS 0.1 REMARK 210 MM EDTA 0.35 MM NAN3 REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 2D NOESY; DQF-COSY; TOCSY; REMARK 210 ROESY; E-COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 600 MHZ REMARK 210 SPECTROMETER MODEL : DMX REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : X-PLOR 3.851, XWINNMR, NMRPIPE REMARK 210 1.7, FELIX REMARK 210 METHOD USED : DISTANCE GEOMETRY SIMULATED REMARK 210 ANNEALING REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 100 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 30 REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH ACCEPTABLE REMARK 210 COVALENT GEOMETRY,STRUCTURES REMARK 210 WITH THE LEAST RESTRAINT REMARK 210 VIOLATIONS,STRUCTURES WITH THE REMARK 210 LOWEST ENERGY REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 25 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: CLOSE CONTACTS 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 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 1 ALA A 5 104.64 -44.25 REMARK 500 1 LYS A 6 88.71 -55.02 REMARK 500 2 LYS A 6 80.02 -58.65 REMARK 500 2 ALA A 24 77.79 -65.53 REMARK 500 2 ASN A 30 23.81 48.77 REMARK 500 3 ALA A 5 94.79 -43.00 REMARK 500 3 LYS A 6 91.04 -47.57 REMARK 500 3 LYS A 23 -156.20 -126.97 REMARK 500 3 ALA A 24 44.47 -160.88 REMARK 500 3 ASN A 30 14.06 57.61 REMARK 500 4 ASN A 4 68.83 -118.91 REMARK 500 4 ALA A 24 62.28 -69.69 REMARK 500 5 ALA A 5 104.52 -41.97 REMARK 500 5 LYS A 6 99.90 -57.40 REMARK 500 5 CYS A 7 -164.59 -70.26 REMARK 500 5 SER A 10 -55.50 170.32 REMARK 500 5 ALA A 25 50.85 -145.23 REMARK 500 6 ALA A 20 -65.55 -91.10 REMARK 500 6 LYS A 27 -162.09 -107.90 REMARK 500 6 ASN A 30 17.87 53.86 REMARK 500 7 LYS A 6 62.63 33.18 REMARK 500 8 ASN A 4 59.31 -113.71 REMARK 500 8 CYS A 7 170.07 -44.14 REMARK 500 8 LYS A 23 -147.50 -123.53 REMARK 500 8 ALA A 24 48.36 -167.56 REMARK 500 8 LYS A 27 -165.00 -127.90 REMARK 500 9 LYS A 6 69.23 -64.35 REMARK 500 9 CYS A 7 156.87 -48.93 REMARK 500 9 SER A 10 -55.83 169.67 REMARK 500 9 ALA A 24 65.01 -65.65 REMARK 500 10 LYS A 6 94.42 -59.85 REMARK 500 11 ASN A 4 30.20 -86.33 REMARK 500 11 LYS A 6 92.56 -39.56 REMARK 500 11 ALA A 20 -65.65 -103.41 REMARK 500 12 LYS A 6 48.80 36.40 REMARK 500 13 CYS A 7 -162.54 -55.54 REMARK 500 13 ARG A 8 -33.87 -141.45 REMARK 500 13 SER A 10 -53.75 168.11 REMARK 500 13 ALA A 24 91.21 -67.30 REMARK 500 14 ASN A 4 46.78 -90.81 REMARK 500 14 ALA A 25 68.19 -150.35 REMARK 500 15 ALA A 5 171.03 -46.88 REMARK 500 15 LYS A 6 69.30 -116.32 REMARK 500 15 CYS A 7 175.24 -49.12 REMARK 500 15 SER A 10 -58.79 175.88 REMARK 500 16 ASN A 4 82.38 -63.87 REMARK 500 16 LYS A 6 92.02 -36.01 REMARK 500 16 ILE A 21 -37.40 -148.52 REMARK 500 17 ASN A 4 48.09 -79.34 REMARK 500 17 LYS A 6 91.08 -45.76 REMARK 500 REMARK 500 THIS ENTRY HAS 86 RAMACHANDRAN OUTLIERS. 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 1 ARG A 8 0.23 SIDE CHAIN REMARK 500 2 ARG A 8 0.31 SIDE CHAIN REMARK 500 3 ARG A 8 0.30 SIDE CHAIN REMARK 500 4 ARG A 8 0.29 SIDE CHAIN REMARK 500 5 ARG A 8 0.31 SIDE CHAIN REMARK 500 6 ARG A 8 0.31 SIDE CHAIN REMARK 500 7 ARG A 8 0.16 SIDE CHAIN REMARK 500 8 ARG A 8 0.31 SIDE CHAIN REMARK 500 9 ARG A 8 0.20 SIDE CHAIN REMARK 500 10 ARG A 8 0.18 SIDE CHAIN REMARK 500 11 ARG A 8 0.14 SIDE CHAIN REMARK 500 12 ARG A 8 0.32 SIDE CHAIN REMARK 500 13 ARG A 8 0.29 SIDE CHAIN REMARK 500 14 ARG A 8 0.32 SIDE CHAIN REMARK 500 15 ARG A 8 0.12 SIDE CHAIN REMARK 500 16 ARG A 8 0.26 SIDE CHAIN REMARK 500 17 ARG A 8 0.17 SIDE CHAIN REMARK 500 18 ARG A 8 0.16 SIDE CHAIN REMARK 500 19 ARG A 8 0.32 SIDE CHAIN REMARK 500 20 ARG A 8 0.12 SIDE CHAIN REMARK 500 21 ARG A 8 0.31 SIDE CHAIN REMARK 500 22 ARG A 8 0.29 SIDE CHAIN REMARK 500 23 ARG A 8 0.19 SIDE CHAIN REMARK 500 24 ARG A 8 0.28 SIDE CHAIN REMARK 500 25 ARG A 8 0.18 SIDE CHAIN REMARK 500 26 ARG A 8 0.32 SIDE CHAIN REMARK 500 27 ARG A 8 0.20 SIDE CHAIN REMARK 500 28 ARG A 8 0.15 SIDE CHAIN REMARK 500 29 ARG A 8 0.27 SIDE CHAIN REMARK 500 30 ARG A 8 0.32 SIDE CHAIN REMARK 500 REMARK 500 REMARK: NULL DBREF 1HP2 A 1 37 UNP P46114 SCKA_TITSE 1 37 SEQRES 1 A 37 VAL PHE ILE ASN ALA LYS CYS ARG GLY SER PRO GLU CYS SEQRES 2 A 37 LEU PRO LYS CYS LYS GLU ALA ILE GLY LYS ALA ALA GLY SEQRES 3 A 37 LYS CYS MET ASN GLY LYS CYS LYS CYS TYR PRO HELIX 1 1 GLY A 9 ILE A 21 1 13 SHEET 1 A 3 PHE A 2 ILE A 3 0 SHEET 2 A 3 LYS A 32 CYS A 35 -1 N CYS A 33 O ILE A 3 SHEET 3 A 3 GLY A 26 MET A 29 -1 O LYS A 27 N LYS A 34 SSBOND 1 CYS A 7 CYS A 28 1555 1555 2.02 SSBOND 2 CYS A 13 CYS A 33 1555 1555 2.02 SSBOND 3 CYS A 17 CYS A 35 1555 1555 2.02 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