2KGH
Solution structure of Brachyperma ruhnaui toxin 2
Summary for 2KGH
| Entry DOI | 10.2210/pdb2kgh/pdb |
| Descriptor | Venom peptide 2 (1 entity in total) |
| Functional Keywords | insecticidal peptides, disulfide bond, neurotoxin, secreted, toxin |
| Biological source | Brachypelma ruhnaui (Mexican golden redrump tarantula) |
| Cellular location | Secreted: P85504 |
| Total number of polymer chains | 1 |
| Total formula weight | 4457.55 |
| Authors | Corzo, G.,Bernard, C.,Clement, H.,Bosmans, F.,Tygat, J.,Possani, L.D.,Darbon, H.,Alagon, A. (deposition date: 2009-03-12, release date: 2009-12-15, Last modification date: 2022-03-16) |
| Primary citation | Corzo, G.,Bernard, C.,Clement, H.,Villegas, E.,Bosmans, F.,Tytgat, J.,Possani, L.D.,Darbon, H.,Alagon, A. Insecticidal peptides from the theraposid spider Brachypelma albiceps: an NMR-based model of Ba2. Biochim.Biophys.Acta, 1794:1190-1196, 2009 Cited by PubMed Abstract: Soluble venom and purified fractions of the theraposid spider Brachypelma albiceps were screened for insecticidal peptides based on toxicity to crickets. Two insecticidal peptides, named Ba1 and Ba2, were obtained after the soluble venom was separated by high performance liquid chromatography and cation exchange chromatography. The two insecticidal peptides contain 39 amino acid residues and three disulfide bonds, and based on their amino acid sequence, they are highly identical to the insecticidal peptides from the theraposid spiders Aphonopelma sp. from the USA and Haplopelma huwenum from China indicating a relationship among these genera. Although Ba1 and Ba2 were not able to modify currents in insect and vertebrate cloned voltage-gated sodium ion channels, they have noteworthy insecticidal activities compared to classical arachnid insecticidal toxins indicating that they might target unknown receptors in insect species. The most abundant insecticidal peptide Ba2 was submitted to NMR spectroscopy to determine its 3-D structure; a remarkable characteristic of Ba2 is a cluster of basic residues, which might be important for receptor recognition. PubMed: 19374957DOI: 10.1016/j.bbapap.2009.04.004 PDB entries with the same primary citation |
| Experimental method | SOLUTION NMR |
Structure validation
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