2E2S image
Deposition Date 2006-11-17
Release Date 2007-08-07
Last Version Date 2024-10-30
Entry Detail
PDB ID:
2E2S
Keywords:
TOXIN
Title:
Solution structure of agelenin, an insecticidal peptide from the venom of Agelena opulenta
Biological Source:
Source Organism:
Allagelena opulenta (Taxon ID: 29934)
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
2E2S validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Agelenin
Chain IDs:A
Chain Length:36
Number of Molecules:1
Biological Source:Allagelena opulenta
UniProt ID:P31328 Pfam ID:PF05980
Ligand Molecules
NA
Primary Citation
Solution structure of agelenin, an insecticidal peptide isolated from the spider Agelena opulenta, and its structural similarities to insect-specific calcium channel inhibitors
Febs Lett. 581 3789 3794 (2007)
PMID: 17644092 DOI: 10.1016/j.febslet.2007.06.077

Abstact

Agelenin, isolated from the Agelenidae spider Agelena opulenta, is a peptide composed of 35 amino acids. We determined the three-dimensional structure of agelenin using two-dimensional NMR spectroscopy. The structure is composed of a short antiparallel beta-sheet and four beta-turns, which are stabilized by three disulfide bonds. Agelenin has characteristic residues, Phe9, Ser28 and Arg33, which are arranged similarly to the pharmacophore of the insect channel inhibitor, omega-atracotoxin-Hv1a. These observations suggest that agelenin and omega-atracotoxin-Hv1a bind to insect calcium channels in a similar manner. We also suggest that another mode of action may operate in the channel inhibition by omega-agatoxin-IVA and omega-atracotoxin-Hv2a.

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Primary Citation of related structures
2E2S