Título: Purification and characterization of soy cotyledon B-glucosidase.
Autores: SANTOS, R. F.
OLIVEIRA, C. F.
VARÉA, G. S.
SILVA, M. L. C. ORRADI da
IDA, E. I.
MANDARINO, J. M. G.
CARRÃO-PANIZZI, M. C.
RIBEIRO, M. L. L.
Fecha: 2013
2012-07-10
Publicador: Repositório Acesso Livre à Informação Científica da Embrapa (ALICE)
Fuente:
Tipo: Artigo em periódico indexado (ALICE)
Tema: Soybean
Descripción: b-Glucosidase F42 of soy cotyledons was purified by ammonium sulfate fractionation, ion-exchange chromatography (CM-Sephadex-C-50, Sigma, St. Louis, MO) and gel filtration (Sephadex G-100, Sigma). The enzyme was purified 111.8-fold relative to its concentration in the crude extract. It had an apparent molecular mass of 53 kDa in gel filtration experiments and produced a 33-kDa band in sodium dodecyl sulfate?polyacrylamide gel electrophoresis, suggesting that it is dimeric. The purified b-glucosidase F42 was characterized as a glycoprotein after the identification of fucose, galactosamine and glucosamine by high-pressure anion-exchange chromatography?pulsed amperometric detector. Its highest activity was observed at pH 5.0 and 45C, and it was stable for up to 4 days at 25C. The Km of the enzyme was 0.12 mMp-nitrophenyl-b-d-glucopyranoside. b-Glucosidase F42 showed specificity for different substrates, and its activity was inhibited by 1 mM HgCl2, 10mM glucono-d-lactone or 150 mMglucose and increased by 10 mMMnCl2.
2013
Idioma: en

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