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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Purification and enzymatic characterization of a novel metalloprotease from Lachesis muta rhombeata snake venom

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Autor(es):
Cordeiro, Francielle Almeida [1] ; Coutinho, Barbara Marques [1] ; Wiezel, Gisele Adriano [1] ; Figueiredo Bordon, Karla de Castro [1] ; Bregge-Silva, Cristiane [2] ; Rosa-Garzon, Nathalia Gonsales [3] ; Cabral, Hamilton [3] ; Ueberheide, Beatrix [4] ; Arantes, Eliane Candiani [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Phys & Chem, Sch Pharmaceut Sci Ribeirao Preto, Av Cafe S-N, BR-14040903 Ribeirao Preto, SP - Brazil
[2] Univ Latina Costa Rica, San Jose - Costa Rica
[3] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Dept Pharmaceut Sci, Ribeirao Preto, SP - Brazil
[4] NYU, Prote Resource Ctr, Langone Med Ctr, 430 East 29th St, New York, NY 10016 - USA
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of Venomous Animals and Toxins including Tropical Diseases; v. 24, NOV 22 2018.
Citações Web of Science: 0
Resumo

BackgroundLachesis muta rhombeata (Lmr) is the largest venomous snake in Latin America and its venom contains mainly enzymatic components, such as serine and metalloproteases, L-amino acid oxidase and phospholipases A(2). Metalloproteases comprise a large group of zinc-dependent proteases that cleave basement membrane components such as fibronectin, laminin and collagen type IV. These enzymes are responsible for local and systemic changes, including haemorrhage, myonecrosis and inflammation. This study aimed the isolation and enzymatic characterization of the first metalloprotease (Lmr-MP) from Lmr venom (LmrV).Methods and resultsLmr-MP was purified through two chromatographic steps and submitted to enzymatic characterization. It showed proteolytic activity on azocasein with maximum activity at pH7.0-9.0. It was inhibited by EDTA (a metal chelator that removes zinc, which is essential for enzymatic activity) and no effect was observed with PMSF, iodoacetic acid or pepstatin (inhibitors of serine, cysteine and aspartyl proteases, respectively). Ca2+, Mg2+ and Ba2+ ions increased its activity, while Al3+, Cu2+, Ni2+ and Zn2+ inhibited it. Additionally, ZnCl2 showed a dose dependent inhibition of the enzyme. Lmr-MP activity was also evaluated upon chromogenic substrates for plasma kallikrein (S-2302), plasmin and streptokinase-activated plasminogen (S-2251) and Factor Xa (S-2222) showing the highest activity on S-2302. The activity in different solutions (5mM or 50mM ammonium bicarbonate, pH7.8; 0.1% trifluoroacetic acid +50% acetonitrile; phosphate buffer saline, pH7.4; 50mM sodium acetate, pH4.0 or ammonium acetate pH4.5) was also evaluated and the results showed that its activity was abolished at acidic pHs. Its molecular mass (22,858Da) was determined by MALDI-TOF and about 90% of its primary structure was verified by high-resolution mass spectrometry using HCD and ETD fragmentations and database search against the sequence of closely related species. It is a novel enzyme which shared high identity with other snake venom metalloproteases (svMPs) belonging to the P-I group.ConclusionThe purification procedure achieved a novel pure highly active metalloprotease from LmrV. This new molecule can help to understand the metalloproteases mechanisms of action, the Lachesis envenoming, as well as to open new perspectives for its use as therapeutic tools. (AU)

Processo FAPESP: 14/23285-3 - Caracterização de modificações pós-traducionais de uma L-aminoácido oxidase isolada da peçonha da serpente Crotalus durissus terrificus
Beneficiário:Gisele Adriano Wiezel
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
Processo FAPESP: 16/09711-5 - Purificação e caracterização estrutural de toxinas de Lachesis muta e Crotalus durissus
Beneficiário:Bárbara Marques Coutinho
Linha de fomento: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
Processo FAPESP: 11/23236-4 - Toxinas animais nativas e recombinantes: análise funcional, estrutural e molecular
Beneficiário:Suely Vilela
Linha de fomento: Auxílio à Pesquisa - Temático