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Biological Chemistry

Editor-in-Chief: Brüne, Bernhard

Editorial Board Member: Buchner, Johannes / Lei, Ming / Ludwig, Stephan / Sies, Helmut / Turk, Boris / Wittinghofer, Alfred

12 Issues per year


IMPACT FACTOR 2015: 2.710
Rank 142 out of 289 in category Biochemistry & Molecular Biology in the 2015 Thomson Reuters Journal Citation Report/Science Edition

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ISSN
1437-4315
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Volume 380, Issue 4 (Apr 1999)

Issues

Isolation and Primary Structure of the CCI Papain-Like Cysteine Proteinases from the Latex of Carica candamarcensis Hook

V. Walraevens / M.-C. Vandermeers-Piret / A. Vandermeers / P. Gourlet / P. Robberecht
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/BC.1999.062

Abstract

The dried latex of the mountain papaya, Carica candamarcensis, was chromatographed on CM-Sephadex C50, giving rise to three peaks (CCI, CCII and CCIII) with amidase activity on N-α-benzoyl-DL-arginine-4-nitroanilide. The less basic, most active, peak, CCI, was separated into two components, CCIa and CCIb, by reverse-phase HPLC under denaturing conditions. The primary structures of CCla and CCIb are presented. They were deduced from sequence analysis of the whole proteins and peptides resulting from enzymatic digestions. Both proteinases are made of 213 amino acid residues, CCIb sharing 88–89% similarity with the three subvariants (G90/R212, E90/R212, E90/K212) of CCIa. 139–140 amino acid residues (65.8%) of CCIa and 141 residues (66.5%) of CCIb are common to papain. The seven cysteine residues are aligned with those of papain and the catalytic triad (Cys25, His159, Asn175) of all cysteine peptidases of the papain family is conserved. The similarity with the other cysteine proteases from Carica papaya is discussed.

About the article

Published Online: 2005-06-01

Published in Print: 1999-04-01


Citation Information: Biological Chemistry, ISSN (Print) 1431-6730, DOI: https://doi.org/10.1515/BC.1999.062. Export Citation

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