Leucaena leucocephala serine proteinase inhibitor: primary structure and action on blood coagulation, kinin release and rat paw edema

Leucaena leucocephala serine proteinase inhibitor: primary structure and action on blood coagulation, kinin release and rat paw edema

Autor Oliva, MLV Google Scholar
Souza-Pinto, José Carlos Autor UNIFESP Google Scholar
Batista, IFC Google Scholar
Araujo, M. S. Google Scholar
Silveira, V. F. Google Scholar
Auerswald, E. A. Google Scholar
Mentele, R. Google Scholar
Eckerskorn, C. Google Scholar
Sampaio, M. U. Google Scholar
Sampaio, CAM Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Max Planck Inst Biochem
Resumo A serine proteinase inhibitor isolated from Leucaena leucocephala seeds (LITI) was purified to homogeneity by acetone fractionation. ion exchange chromatography, gel filtration and reverse phase chromatography (HPLC). SDS-PAGE indicated a protein with M-r 30 000 and two polypeptide chains (alpha-chain, M-r 15 000, and beta-chain, M-r 5000), the sequence being determined by automatic Edman degradation and by mass spectroscopy. LITI is a 174 amino acid residue protein which shows high homology to plant Kunitz inhibitors, especially those double chain proteins purified from the Mimosoideae subfamily. LITI inhibits plasmin (K-i 3.2 X 10(-10) M), human plasma kallikrein (K-i 6.3 X 10(-10) M), trypsin (K-i 1.5 X 10(-8) M) and chymotrypsin (K-i 1.4 X 10(-8) M). Factor XIIa activity is inhibited but K-i was not determined, and factor Xa, tissue kallikrein and thrombin are not inhibited by LITI. the action of LITI on enzymes that participate in the blood clotting extrinsic pathway is confirmed by the prolongation of activated partial thromboplastin time, used as clotting time assay. the inhibition of the fibrinolytic activity of plasmin was confirmed on the hydrolysis of fibrin plates. LlTI inhibits kinin release from high molecular weight kininogen by human plasma kallikrein in vitro and, administered intravenously, causes a decrease in paw edema induced by carrageenin or heat in male Wistar rats. Is addition, lower concentrations of bradykinin were found in limb perfusion fluids of LlTI-treated rats, (C) 2000 Elsevier Science B.V. All rights reserved.
Palavra-chave Leucaena leucocephala
Kunitz inhibitor
Kallikrein inhibitor
amino acid sequence
paw edema
Idioma Inglês
Data de publicação 2000-03-07
Publicado em Biochimica Et Biophysica Acta-protein Structure and Molecular Enzymology. Amsterdam: Elsevier B.V., v. 1477, n. 1-2, p. 64-74, 2000.
ISSN 0167-4838 (Sherpa/Romeo, fator de impacto)
Publicador Elsevier B.V.
Extensão 64-74
Fonte http://dx.doi.org/10.1016/S0167-4838(99)00285-X
Direito de acesso Acesso restrito
Tipo Resenha
Web of Science WOS:000085998500007
Endereço permanente http://repositorio.unifesp.br/handle/11600/26269

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