HEADER ION CHANNEL INHIBITOR 10-APR-06 2CK5 TITLE SOLUTION STRUCTURE OF DELTA 1-7 AOSK1 COMPND MOL_ID: 1; COMPND 2 MOLECULE: POTASSIUM CHANNEL TOXIN ALPHA-KTX 3.7; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: DELTA 1-7 AOSK1, TOXIN OSK1, OSK-1; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 ORGANISM_SCIENTIFIC: ORTHOCHIRUS SCROBICULOSUS; SOURCE 4 ORGANISM_COMMON: CENTRAL ASIAN SCORPION; SOURCE 5 ORGANISM_TAXID: 6892 KEYWDS ION CHANNEL INHIBITOR, POTASSIUM CHANNEL INHIBITOR, ION KEYWDS 2 CHANNEL BLOCKER, IONIC CHANNEL INHIBITOR, OSK1, TOXIN, KEYWDS 3 NEUROTOXIN, SCORPIO TOXIN EXPDTA SOLUTION NMR NUMMDL 20 AUTHOR S.ALPHONSE,S.MOUHAT,J.M.SABATIER,H.DARBON,C.BERNARD REVDAT 2 24-FEB-09 2CK5 1 VERSN REVDAT 1 15-MAY-07 2CK5 0 JRNL AUTH S.ALPHONSE,S.MOUHAT,J.M.SABATIER,H.DARBON,C.BERNARD JRNL TITL SOLUTION STRUCTURE OF TWO ANALOGUES OF THE OSK1 JRNL TITL 2 TOXIN JRNL REF TO BE PUBLISHED JRNL REFN REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : ARIA REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS, GROSSE- REMARK 3 KUNSTLEVE,JIANG,KUSZEWSKI,NILGES, PANNU,READ, REMARK 3 RICE,SIMONSON,WARREN REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: WATER REFINEMENT USING THE OPLSX REMARK 3 FORCEFIELD REMARK 4 REMARK 4 2CK5 COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 11-APR-06. REMARK 100 THE PDBE ID CODE IS EBI-28456. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 300.0 ; 300.0 ; 300.0 REMARK 210 PH : 3.5 ; 3.5 ; 3.5 REMARK 210 IONIC STRENGTH : NULL ; NULL ; NULL REMARK 210 PRESSURE : 1.0 ; 1.0 ; 1.0 REMARK 210 SAMPLE CONTENTS : 90% WATER/10% D2O REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : NOESY ; TOCSY ; COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 500 ; 500 ; 500 REMARK 210 SPECTROMETER MODEL : OTHER ; OTHER ; OTHER REMARK 210 SPECTROMETER MANUFACTURER : BRUKER ; BRUKER ; BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : NMRVIEW REMARK 210 METHOD USED : ARIA REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 50 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 20 REMARK 210 CONFORMERS, SELECTION CRITERIA : LEAST RESTRAINT VIOLATION REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 18 REMARK 210 REMARK 210 REMARK: NONE 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 400 REMARK 400 COMPOUND REMARK 400 BLOCKER OF SMALL CONDUCTANCE CALCIUM-ACTIVATED POTASSIUM REMARK 400 CHANNELS REMARK 400 ENGINEERED RESIDUE IN CHAIN A, GLU 16 TO LYS REMARK 400 ENGINEERED RESIDUE IN CHAIN A, LYS 20 TO ASP REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT 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 HB3 CYS A 11 - HG3 MET A 16 1.55 REMARK 500 HG3 MET A 16 - HB3 CYS A 28 1.59 REMARK 500 HG3 ARG A 17 - HG2 LYS A 31 1.44 REMARK 500 HB2 CYS A 21 - HB3 CYS A 26 1.50 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 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 14 LYS A 2 -27.55 -153.23 REMARK 500 17 LYS A 2 -16.45 -142.90 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1SCO RELATED DB: PDB REMARK 900 SCORPION TOXIN (OSK1 TOXIN) WITH HIGH REMARK 900 AFFINITY FOR SMALL CONDUCTANCE CA(2+)- REMARK 900 ACTIVATED K+ CHANNEL IN NEUROBLASTOMA-X- REMARK 900 GLUOMA NG 108-15 HYBRID CELLS, NMR, 30 REMARK 900 STRUCTURES REMARK 900 RELATED ID: 2CK4 RELATED DB: PDB REMARK 900 SOLUTION STRUCTURE OF AOSK1 REMARK 999 REMARK 999 SEQUENCE REMARK 999 MUTATIONS E16K K20D AND DELETION 1-7 DBREF 2CK5 A 1 31 UNP P55896 KAX37_ORTSC 8 38 SEQADV 2CK5 LYS A 9 UNP P55896 GLU 16 ENGINEERED MUTATION SEQADV 2CK5 ASP A 13 UNP P55896 LYS 20 ENGINEERED MUTATION SEQRES 1 A 31 CYS LYS ILE SER ARG GLN CYS LEU LYS PRO CYS LYS ASP SEQRES 2 A 31 ALA GLY MET ARG PHE GLY LYS CYS MET ASN GLY LYS CYS SEQRES 3 A 31 HIS CYS THR PRO LYS HELIX 1 1 SER A 4 ASP A 13 1 10 SHEET 1 AA 2 MET A 16 MET A 22 0 SHEET 2 AA 2 LYS A 25 PRO A 30 -1 O LYS A 25 N MET A 22 SSBOND 1 CYS A 1 CYS A 21 1555 1555 2.03 SSBOND 2 CYS A 7 CYS A 26 1555 1555 2.03 SSBOND 3 CYS A 11 CYS A 28 1555 1555 2.03 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