Serine proteinase inhibitors from eggs and larvae of tick Boophilus microplus: Purification and biochemical characterization

Show simple item record Andreotti, R. Malavazi-Piza, K. C. Sasaki, S. D. Torquato, RJS Gomes, A. Tanaka, A. S. 2016-01-24T12:31:26Z 2016-01-24T12:31:26Z 2001-07-01
dc.identifier.citation Journal of Protein Chemistry. New York: Kluwer Academic/plenum Publ, v. 20, n. 5, p. 337-343, 2001.
dc.identifier.issn 0277-8033
dc.description.abstract The present study describes the purification, characterization, and comparison of serine proteinase inhibitors during the development of egg and larva phases of the tick Boophilus microplus. Samples were collected of eggs between the first day of hatching and the beginning of eclosion (defined as E1, E2, and E3) and of larvae between the first day of eclosion and the infectant phase (defined as L1, L2, and L3). Crude extracts of the samples (2.5% w/v in Tris-HCl buffer) were analyzed by SDS-PAGE, and showed three major protein bands of 42, 62, and 85 kDa, differing in intensity, from El to L3 samples. the total protein of the larva extracts was 34% less than that of the egg extracts, while no differences in active protein were detected. the apparent dissociation constant Ki determined for trypsin was 10-fold lower from E1 to L3 samples. Serine proteinase inhibitors from tick eggs and larvae (BmTls) were purified on trypsin-Sepharose column and analyzed by SDS-PAGE. the results showed a slight difference in protein pattern, with a protein band of 20 kDa in the El and E2 samples which did not appear in the other samples. the K-i for neutrophil elastase was 10-fold lower in L3 than E1. BmTI reverse-phase chromatography showed two and one major peaks in egg and larva samples, respectively. the N-terminal amino acid sequence of the L3 main peak from a C8 column showed a mix of BmTls with the major sequence AVDFDKGCVPTADPGPCKG. Changes indicated by molecular weight and inhibition activity suggest different roles for BmTIs during the development process. en
dc.format.extent 337-343
dc.language.iso eng
dc.publisher Kluwer Academic/plenum Publ
dc.relation.ispartof Journal of Protein Chemistry
dc.rights Acesso restrito
dc.subject serine proteinase inhibitors en
dc.subject Boophilus microplus tick en
dc.subject protein purification en
dc.subject human neutrophil elastase en
dc.title Serine proteinase inhibitors from eggs and larvae of tick Boophilus microplus: Purification and biochemical characterization en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.contributor.institution Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.description.affiliation UNIFESP, EPM, Dept Bioquim, BR-04044020 São Paulo, Brazil
dc.description.affiliation Embrapa Gado de Corte, Campo Grande, MS, Brazil
dc.description.affiliationUnifesp UNIFESP, EPM, Dept Bioquim, BR-04044020 São Paulo, Brazil
dc.identifier.doi 10.1023/A:1012242817869
dc.description.source Web of Science
dc.identifier.wos WOS:000172137100001


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