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Biological Chemistry

Editor-in-Chief: Brüne, Bernhard

Editorial Board: Buchner, Johannes / Lei, Ming / Ludwig, Stephan / Sies, Helmut / Thomas, Douglas D. / Turk, Boris / Wittinghofer, Alfred

12 Issues per year


IMPACT FACTOR 2017: 3.022

CiteScore 2017: 2.81

SCImago Journal Rank (SJR) 2017: 1.562
Source Normalized Impact per Paper (SNIP) 2017: 0.705

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ISSN
1437-4315
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Volume 383, Issue 5

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Epoxysuccinyl Peptide-Derived Cathepsin B Inhibitors: Modulating Membrane Permeability by Conjugation with the C-Terminal Heptapeptide Segment of Penetratin

Norbert Schaschke / Dominga Deluca / Irmgard Assfalg-Machleidt / Clara Höhneke / Christian P. Sommerhoff / Werner Machleidt
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/BC.2002.090

Abstract

Besides its physiological role in lysosomal protein breakdown, extralysosomal cathepsin B has recently been implicated in apoptotic cell death. Highly specific irreversible cathepsin B inhibitors that are readily cellpermeant should be useful tools to elucidate the effects of cathepsin B in the cytosol. We have covalently functionalised the poorly cellpermeant epoxysuccinyl based cathepsin B inhibitor [RGlyGlyLeu(2S, 3S)tEpsLeuProOH; R=OMe] with the Cterminal heptapeptide segment of penetratin (R=AhxArg ArgNleLysTrpLysLysNH2). The high inhibitory potency and selectivity for cathepsin B versus cathepsin L of the parent compound was not affected by the conjugation with the penetratin heptapeptide. The conjugate was shown to efficiently penetrate into MCF-7 cells as an active inhibitor, thereby circumventing an intracellular activation step that is required by other inhibitors, such as the prodruglike epoxysuccinyl peptides E64d and CA074Me.

About the article

Published Online: 2005-06-01

Published in Print: 2002-05-15


Citation Information: Biological Chemistry, Volume 383, Issue 5, Pages 849–852, ISSN (Print) 1431-6730, DOI: https://doi.org/10.1515/BC.2002.090.

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