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Crystal structure of an acidic, non-myotoxic phospholipase A2 from the venom of Bothrops jararacussu
Structural highlights
FunctionPA2A_BOTJR Snake venom phospholipase A2 (PLA2) that induces edema (activity that is inhibited by EDTA and dexamethasone), inhibits phospholipid-dependent collagen/ADP-induced platelet aggregation, possess hypotensive as well as anticoagulant activities. In addition, this enzyme shows bactericidal activity against E.coli and S.aureus. PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides.[1] [2] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedPhospholipases A2 belong to the superfamily of proteins which hydrolyzes the sn-2 acyl groups of membrane phospholipids to release arachidonic acid and lysophospholipids. An acidic phospholipase A2 isolated from Bothrops jararacussu snake venom presents a high catalytic, platelet aggregation inhibition and hypotensive activities. This protein was crystallized in two oligomeric states: monomeric and dimeric. The crystal structures were solved at 1.79 and 1.90 angstroms resolution, respectively, for the two states. It was identified a Na+ ion at the center of Ca2+-binding site of the monomeric form. A novel dimeric conformation with the active sites exposed to the solvent was observed. Conformational states of the molecule may be due to the physicochemical conditions used in the crystallization experiments. We suggest dimeric state is one found in vivo. Crystal structure of an acidic platelet aggregation inhibitor and hypotensive phospholipase A2 in the monomeric and dimeric states: insights into its oligomeric state.,Magro AJ, Murakami MT, Marcussi S, Soares AM, Arni RK, Fontes MR Biochem Biophys Res Commun. 2004 Oct 8;323(1):24-31. PMID:15351695[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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