Purification and characterization of four new cysteine endopeptidases from fruits of Bromelia pinguin L. grown in Cuba

Juan Abreu Payrol, Walter D. Obregón, Sebastián A. Trejo, Néstor O. Caffini

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Bromelia pinguin L. is a plant broadly distributed in Central America and Caribbean islands. The fruits have been used in traditional medicine as anthelmintic, probably owed to the presence of a mixture of cysteine endopeptidases, initially termed pinguinain. This work deals with the purification and characterization of the four main components of that mixture, two of them showing acid pI and the other two alkaline pI. Molecular masses (SDS-PAGE and MALDI-TOF), N-terminal sequence and the reactivity and kinetic parameters versus synthetic substrates (p-nitrophenyl-N-α-CBZ-amino acid esters, PFLNA, Z-Arg-Arg-p-NA, and Z-Phe-Arg-p-NA) of the studied peptidases are given, as well as the N-terminal sequences of the enzymes and the homology degree with other plant endopeptidases. © 2007 Springer Science+Business Media, LLC.
Original languageEnglish
Pages (from-to)88-96
JournalProtein Journal
Volume27
Issue number2
DOIs
Publication statusPublished - 1 Feb 2008

Keywords

  • Bromelia pinguin L.
  • Bromeliaceae
  • Pinguinain
  • Plant cysteine endopeptidases

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