title: Purification and characterization of a phospholipase A2 from the venom of the coral snake, Micrurus fulvius microgalbineus (Brown and Smith).
abstract: A phospholipase A2 was purified from the Mexican coral snake Micrurus fulvius microgalbieus (Brown and Smith). Gel filtration of the soluble crude venom on Sephadex g-50 resolved five fractions, of which fraction II had 98% of the total phospholipase activity. This fraction was rechromatographed on a CM-cellulose column that resolved eight fractions, four of which had an important phospholipase activity. The first fraction (II-1) was homogeneous by polyacrylamide-gel electrophoresis and displayed a phospholipase specific activity of 920 units/mg of protein. The apparent molecular weight as determined by sodium dodecyl sulphate/polyacrylamide-gel electrophoresis was approx. 14000. The amino acid analysis revealed the presence of 119 amino acid residues, with 12 half-cystines. the N-terminal sequence was shown to be Ser-Leu-Leu-Asx-Phe-Lys-Asx-Met-Ile-Glu-Ser-Thr..., which is homologous with that of phospholipases from other snake venoms.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004546:Elapid Venoms / Q000032:analysis*; D051379:Mice; D008970:Molecular Weight; D010740:Phospholipases / Q000302:isolation & purification*
chemical_list: D000596:Amino Acids; D004546:Elapid Venoms; D010740:Phospholipases