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Type: Artigo de periódico
Title: Isolation and characterization of a new trypsin inhibitor from Crotalaria paulina seeds
Author: Pando, LA
Di Ciero, L
Novello, JC
Oliveira, B
Weder, JKP
Marangoni, S
Abstract: A new trypsin inhibitor (CPTI) has been isolated from Crotalaria paulina seeds. Purification of the inhibitor was carried out by gel filtration, ion-exchange chromatography, and subsequent reversed-phase HPLC. The presence of a single polypeptide chain, with a molecular mass of 20 kDa and isoelectric point 4.0, was detected. The trypsin inhibitor had a K-i value of 4.5 x 10(-8) M and was capable of acting on human, bovine, and porcine trypsin and weakly on bovine chymotrypsin, Amino acid analysis showed that CPTI has a high content of aspartate, glutamate, leucine, serine, and glycine, having 177 amino acid residues in its composition. These data suggest that the protein belongs to the Kunitz-type trypsin inhibitors.
Subject: Crotalaria paulina
trypsin inhibitor
Country: EUA
Editor: Taylor & Francis Inc
Citation: Iubmb Life. Taylor & Francis Inc, v. 48, n. 5, n. 519, n. 523, 1999.
Rights: fechado
Identifier DOI: 10.1080/713803553
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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