1SIS

SPATIAL STRUCTURE OF INSECTOTOXIN I5A BUTHUS EUPEUS BY 1H NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY (RUSSIAN)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 10 

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This is version 1.3 of the entry. See complete history

Literature

Determination of the spatial structure of insectotoxin 15A from Buthus erpeus by (1)H-NMR spectroscopy data

Lomize, A.L.Maiorov, V.N.Arsen'ev, A.S.

(1991) Bioorg.Khim. 17: 1613-1632


  • PubMed Abstract: 
  • The solution structure of insectotoxin 15A (35 residues) from scorpion Buthus eupeus was determined on the basis of 386 interproton distance restraints 12 hydrogen-bonding restraints and 113 dihedral angle restraints derived from 1H NMR experiments. ...

    The solution structure of insectotoxin 15A (35 residues) from scorpion Buthus eupeus was determined on the basis of 386 interproton distance restraints 12 hydrogen-bonding restraints and 113 dihedral angle restraints derived from 1H NMR experiments. A group of 20 structures was calculated with the distance geometry program DIANA followed by the restrained energy minimization with the program CHARMM. The atomic RMS distribution about the mean coordinate position is 0.64 +/- 0.11 A for the backbone atoms and 1.35 +/- 0.20 A for all atoms. The structure contains an alpha-helix (residues 10-20) and a three-stranded antiparallel beta-sheet (residues 2-5, 24-28 and 29-33). A pairing of the eight cysteine residues of insectotoxin 15A was established basing on NMR data. Three disulfide bridges (residues 2-19, 16-31 and 20-33) connect the alpha-helix with the beta-sheet, and the fourth one (5-26) joins beta-strands together. The spatial fold of secondary structure elements (the alpha-helix and the beta-sheet) of the insectotoxin 15A is very similar to those of the other short and long scorpion toxins in spite of a low (about 20%) sequence homology.


    Related Citations: 
    • Secondary Structure and Sequential Resonance Assignments in Two Dimensional Proton Magnetic Resonance Spectra of Insectotoxin I5A Buthus Eupeus (Russian)
      Arseniev, A.S.,Kondakov, V.I.,Maiorov, V.N.,Volkova, T.V.,Grishin, E.V.,Bystrov, V.F.,Ovchinnikov, Y.A.
      (1983) Bioorg.Khim. 9: 768
    • The Local Structure of a Protein Insectotoxin I5A from Buthus Eupeus Determined from 1H NMR Data (Russian)
      Lomize, A.L.,Arseniev, A.S.,Maslennikov, I.V.,Bystrov, V.F.
      (1990) Bioorg.Khim. 16: 1310
    • NMR Conformational Analysis of the Spatial Structure of Insectotoxin I5A Buthus Eupeus (Russian)
      Arseniev, A.S.,Kondakov, V.I.,Maiorov, V.N.,Bystrov, V.F.,Ovchinnikov, Y.A.
      (1983) Bioorg.Khim. 9: 1667
    • NMR Solution Spatial Structure of 'Short' Insectotoxin I5A
      Arseniev, A.S.,Kondakov, V.I.,Maiorov, V.N.,Bystrov, V.F.
      (1984) FEBS Lett. 165: 57



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SCORPION INSECTOTOXIN I5A
A
36Mesobuthus eupeusMutation(s): 0 
Find proteins for P15222 (Mesobuthus eupeus)
Go to UniProtKB:  P15222
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 10 
  • Olderado: 1SIS Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-04-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other