HEADER TOXIN 05-SEP-05 2AXK TITLE SOLUTION STRUCTURE OF DISCREPIN, A SCORPION VENOM TOXIN BLOCKING K+ TITLE 2 CHANNELS. COMPND MOL_ID: 1; COMPND 2 MOLECULE: DISCREPIN; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 OTHER_DETAILS: THIS SEQUENCE OCCURS NATURALLY IN THE VENOM OF SOURCE 4 SCORPION TITYUS DISCREPANS. KEYWDS DISCREPIN, SCORPION TOXIN, A-CURRENT, K+-CHANNEL, TOXIN EXPDTA SOLUTION NMR NUMMDL 10 AUTHOR A.PROCHNICKA-CHALUFOUR,G.CORZO,H.SATAKE,M.-F.MARTIN-EAUCLAIRE, AUTHOR 2 A.R.MURGIA,G.PRESTIPINO,G.D'SUZE,L.D.POSSANI,M.DELEPIERRE REVDAT 3 25-DEC-19 2AXK 1 REMARK SEQRES LINK REVDAT 2 24-FEB-09 2AXK 1 VERSN REVDAT 1 20-JUN-06 2AXK 0 JRNL AUTH A.PROCHNICKA-CHALUFOUR,G.CORZO,H.SATAKE, JRNL AUTH 2 M.-F.MARTIN-EAUCLAIRE,A.R.MURGIA,G.PRESTIPINO,G.D'SUZE, JRNL AUTH 3 L.D.POSSANI,M.DELEPIERRE JRNL TITL SOLUTION STRUCTURE OF DISCREPIN, A NEW K+-CHANNEL BLOCKING JRNL TITL 2 PEPTIDE FROM THE ALPHA-KTX15 SUBFAMILY. JRNL REF BIOCHEMISTRY V. 45 1795 2006 JRNL REFN ISSN 0006-2960 JRNL PMID 16460026 JRNL DOI 10.1021/BI0519248 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH G.D'SUZE,C.V.F.BATISTA,A.FRAU,A.R.MURGIA,F.Z.ZAMUDIO, REMARK 1 AUTH 2 C.SEVCIK,L.D.POSSANI,G.PRESTIPINO REMARK 1 TITL DISCREPIN, A NEW PEPTIDE OF THE SUB-FAMILY ALPHA-KTX15, REMARK 1 TITL 2 ISOLATED FROM THE SCORPION TITYUS DISCREPANS IRREVERSIBLY REMARK 1 TITL 3 BLOCKS K+-CHANNELS (IA CURRENTS) OF CEREBELLUM GRANULAR REMARK 1 TITL 4 CELLS. REMARK 1 REF ARCH.BIOCHEM.BIOPHYS. V. 430 256 2004 REMARK 1 REFN ISSN 0003-9861 REMARK 1 PMID 15369825 REMARK 1 DOI 10.1016/J.ABB.2004.07.010 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : VNMR 6.1C, CNS 1.1 REMARK 3 AUTHORS : VARIAN INC. (VNMR), BRUNGER (CNS) REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: STRUCTURES BASED ON TOTAL OF 565 REMARK 3 MEANINGFUL DISTANCE CONSTRAINTS, 22 DIHEDRAL ANGLE CONSTRAINTS REMARK 3 AND THREE HYDROGEN BONDS. THREE DISULFIDE BRIDGES (8-29, 14-34, REMARK 3 18-36) WERE ALSO INCLUDED IN CACLULATION. REMARK 4 REMARK 4 2AXK COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 06-SEP-05. REMARK 100 THE DEPOSITION ID IS D_1000034433. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 308 REMARK 210 PH : 4 REMARK 210 IONIC STRENGTH : 5 REMARK 210 PRESSURE : AMBIENT REMARK 210 SAMPLE CONTENTS : 3 MM DISCREPIN 10% D2O; 3 MM REMARK 210 DISCREPIN 100% D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 2D NOESY; 2Q-COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 600 MHZ REMARK 210 SPECTROMETER MODEL : INOVA REMARK 210 SPECTROMETER MANUFACTURER : VARIAN REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : XEASY 3.1, ARIA 1.2, CNS 1.1 REMARK 210 METHOD USED : TORSION ANGLE DYNAMICS REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 200 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 10 REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH THE LOWEST REMARK 210 ENERGY AND BEST SECONDARY REMARK 210 STRUCTURE REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 1 REMARK 210 REMARK 210 REMARK: NULL 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 SER A 9 32.91 -86.43 REMARK 500 1 TYR A 22 -94.35 -117.11 REMARK 500 1 ASN A 23 18.40 -160.08 REMARK 500 2 TYR A 22 -116.53 -124.27 REMARK 500 2 ASN A 23 101.95 -164.40 REMARK 500 3 ASN A 5 71.71 52.98 REMARK 500 3 SER A 11 -27.66 -164.38 REMARK 500 3 TYR A 22 -109.11 -115.10 REMARK 500 3 ASN A 23 15.57 -161.85 REMARK 500 3 ILE A 30 -71.88 -112.75 REMARK 500 3 ASN A 31 40.37 -98.27 REMARK 500 4 SER A 11 -37.64 71.46 REMARK 500 4 TYR A 22 -113.57 -111.93 REMARK 500 4 ASN A 23 19.73 -159.04 REMARK 500 4 ARG A 25 -1.35 -142.50 REMARK 500 5 TYR A 22 -111.71 -110.64 REMARK 500 5 ASN A 23 12.92 -161.59 REMARK 500 5 ILE A 30 -63.60 -99.07 REMARK 500 6 TYR A 22 -108.07 -108.54 REMARK 500 6 ASN A 23 18.18 -161.21 REMARK 500 6 ILE A 30 -66.09 -98.46 REMARK 500 6 ASN A 31 34.98 -96.64 REMARK 500 7 TYR A 22 -109.38 -123.07 REMARK 500 7 ASN A 23 4.62 -162.51 REMARK 500 7 ASN A 31 40.74 -95.18 REMARK 500 8 TYR A 22 -101.87 -109.37 REMARK 500 8 ASN A 23 -15.08 -160.39 REMARK 500 8 ILE A 30 -64.34 -127.97 REMARK 500 8 ASN A 31 33.71 -95.77 REMARK 500 9 SER A 9 43.21 -96.76 REMARK 500 9 SER A 11 -51.41 65.46 REMARK 500 9 TYR A 22 -114.09 -121.81 REMARK 500 9 ASN A 23 92.06 -161.73 REMARK 500 10 TYR A 22 -111.50 -110.05 REMARK 500 10 ASN A 23 6.41 -162.13 REMARK 500 10 ILE A 30 -55.79 -121.77 REMARK 500 REMARK 500 REMARK: NULL REMARK 999 REMARK 999 SEQUENCE REMARK 999 NO SUITABLE SEQUENCE DATABASE REFERENCE WAS AVAILABLE AT REMARK 999 THE TIME OF PROCESSING THIS FILE. DBREF 2AXK A 1 38 UNP P84777 KA156_TITDI 1 38 SEQRES 1 A 38 PCA ILE ASP THR ASN VAL LYS CYS SER GLY SER SER LYS SEQRES 2 A 38 CYS VAL LYS ILE CYS ILE ASP ARG TYR ASN THR ARG GLY SEQRES 3 A 38 ALA LYS CYS ILE ASN GLY ARG CYS THR CYS TYR PRO MODRES 2AXK PCA A 1 GLN PYROGLUTAMIC ACID HET PCA A 1 14 HETNAM PCA PYROGLUTAMIC ACID FORMUL 1 PCA C5 H7 N O3 HELIX 1 1 GLY A 10 TYR A 22 1 13 SHEET 1 A 3 ILE A 2 LYS A 7 0 SHEET 2 A 3 ARG A 33 CYS A 36 -1 O CYS A 34 N VAL A 6 SHEET 3 A 3 ALA A 27 CYS A 29 -1 N LYS A 28 O THR A 35 SSBOND 1 CYS A 8 CYS A 29 1555 1555 2.03 SSBOND 2 CYS A 14 CYS A 34 1555 1555 2.02 SSBOND 3 CYS A 18 CYS A 36 1555 1555 2.03 LINK C PCA A 1 N ILE A 2 1555 1555 1.33 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 HETATM 1 N PCA A 1 -1.046 -10.763 0.485 1.00 0.00 N HETATM 2 CA PCA A 1 -1.788 -9.486 0.561 1.00 0.00 C HETATM 3 CB PCA A 1 -1.068 -8.804 1.724 1.00 0.00 C HETATM 4 CG PCA A 1 0.007 -9.727 2.222 1.00 0.00 C HETATM 5 CD PCA A 1 -0.082 -10.982 1.398 1.00 0.00 C HETATM 6 OE PCA A 1 0.927 -11.647 1.146 1.00 0.00 O HETATM 7 C PCA A 1 -1.669 -8.669 -0.722 1.00 0.00 C HETATM 8 O PCA A 1 -1.299 -9.197 -1.774 1.00 0.00 O HETATM 9 H PCA A 1 -1.257 -11.428 -0.207 1.00 0.00 H HETATM 10 HA PCA A 1 -2.828 -9.637 0.807 1.00 0.00 H HETATM 11 HB2 PCA A 1 -1.764 -8.609 2.526 1.00 0.00 H HETATM 12 HB3 PCA A 1 -0.622 -7.877 1.386 1.00 0.00 H HETATM 13 HG2 PCA A 1 -0.164 -9.968 3.259 1.00 0.00 H HETATM 14 HG3 PCA A 1 0.976 -9.265 2.089 1.00 0.00 H