Crystallization and preliminary X-ray diffraction studies of BmooPLA(2)-I, a platelet-aggregation inhibitor and hypotensive phospholipase A(2) from Bothrops moojeni venom

Salvador, Guilherme H. M. [UNESP]; Marchi-Salvador, Daniela P. [UNESP]; Silveira, Lucas B.; Soares, Andreimar M.; Fontes, Marcos R. M. [UNESP]

Crystallization and preliminary X-ray diffraction studies of BmooPLA(2)-I, a platelet-aggregation inhibitor and hypotensive phospholipase A(2) from Bothrops moojeni venom

Arquivos

WOS000293698400013.pdf (166.55 KB)

Data

2011-08-01

Autores

Salvador, Guilherme H. M.

Marchi-Salvador, Daniela P.

Silveira, Lucas B.

Soares, Andreimar M.

Fontes, Marcos R. M.

Editor

Wiley-Blackwell

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

Phospholipases A(2) (PLA(2)s) are enzymes that cause the liberation of fatty acids and lysophospholipids by the hydrolysis of membrane phospholipids. In addition to their catalytic action, a wide variety of pharmacological activities have been described for snake-venom PLA(2)s. BmooPLA(2)-I is an acidic, nontoxic and catalytic PLA(2) isolated from Bothrops moojeni snake venom which exhibits an inhibitory effect on platelet aggregation, an immediate decrease in blood pressure, inducing oedema at a low concentration, and an effective bactericidal effect. BmooPLA(2)-I has been crystallized and X-ray diffraction data have been collected to 1.6 angstrom resolution using a synchrotron-radiation source. The crystals belonged to space group C222(1), with unit-cell parameters a = 39.7, b = 53.2, c = 89.2 angstrom. The molecular-replacement solution of BmooPLA(2)-I indicated a monomeric conformation, which is in agreement with nondenaturing electrophoresis and dynamic light-scattering experiments. A comparative study of this enzyme with the acidic PLA(2) from B. jararacussu (BthA-I) and other toxic and nontoxic PLA(2)s may provide important insights into the functional aspects of this class of proteins.