Structural highlights
Function
BIB11_SICTE Dermonecrotic toxins cleave the phosphodiester linkage between the phosphate and headgroup of certain phospholipids (sphingolipid and lysolipid substrates), forming an alcohol (often choline) and a cyclic phosphate (PubMed:25752604). This toxin acts on lysophosphatidylethanolamine (LPE) and ceramide phosphoethanolamine (CPE) with high activity (PubMed:25752604). This toxin acts on sphingomyelin (SM) with very low activity and is not active on lysophosphatidylserine (LPS), lysophosphatidylcholine (LPC) and lysophosphatidylglycerol (LPG) (PubMed:25752604). It acts by transphosphatidylation, releasing exclusively cyclic phosphate as second products (PubMed:25752604). It is not surprising that spider toxins have affinity for ethanolamine-containing sphingolipids since they are common in insect prey (PubMed:25752604). Induces dermonecrosis, hemolysis, increased vascular permeability, edema, inflammatory response, and platelet aggregation (By similarity).[UniProtKB:P0CE80][1]
References
- ↑ Lajoie DM, Roberts SA, Zobel-Thropp PA, Delahaye JL, Bandarian V, Binford GJ, Cordes MH. Variable Substrate Preference Among Phospholipase D Toxins From Sicariid Spiders. J Biol Chem. 2015 Mar 9. pii: jbc.M115.636951. PMID:25752604 doi:http://dx.doi.org/10.1074/jbc.M115.636951
