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Regulation of cathepsin K activity by hydrogen peroxide
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Emmanuel Godat
Published/Copyright:
August 19, 2008
Abstract
Although cysteine cathepsins, including cathepsin K, are sensitive to oxidation, proteolytically active forms are found at inflammatory sites. Regulation of cathepsin K activity was analyzed in the presence of H2O2 to gain an insight into these puzzling observations. H2O2 impaired processing of procathepsin K and inactivated its mature form in a time- and dose-dependent mode. However, as a result of the formation of a sulfenic acid, as confirmed by trapping in the presence of 7-chloro-4-nitrobenzo-2-oxa-1,3-diazol, approximately one-third of its initial activity was restored by dithiothreitol. This incomplete inactivation may partially explain why active cysteine cathepsins are still found during acute lung inflammation.
Received: 2007-12-18
Accepted: 2008-1-14
Published Online: 2008-08-19
Published in Print: 2008-08-01
©2008 by Walter de Gruyter Berlin New York
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Keywords for this article
cysteine cathepsin;
inflammation;
oxidation;
protease;
proteolysis;
sulfenic acid
Articles in the same Issue
- Editors' Note
- Editors' Note
- Editorial
- Farewell to Hans Fritz, Executive Editor
- Guest Editorial
- Highlight on Advances in Proteolysis Research
- Highlight: 5th General Meeting of the International Proteolysis Society 2007
- Proteinases as hormones: targets and mechanisms for proteolytic signaling
- Glutaminyl cyclases from animals and plants: a case of functionally convergent protein evolution
- Alternative pathways for production of β-amyloid peptides of Alzheimer's disease
- Bauhinia Kunitz-type proteinase inhibitors: structural characteristics and biological properties
- Angiotensin-converting enzyme limits inflammation elicited by Trypanosoma cruzi cysteine proteases: a peripheral mechanism regulating adaptive immunity via the innate kinin pathway
- How Na+ activates thrombin – a review of the functional and structural data
- Cancer cells, adipocytes and matrix metalloproteinase 11: a vicious tumor progression cycle
- Isoaspartate residues dramatically influence substrate recognition and turnover by proteases
- Isoaspartate-containing amyloid precursor protein-derived peptides alter efficacy and specificity of potential β-secretases
- Trial of the cysteine cathepsin inhibitor JPM-OEt on early and advanced mammary cancer stages in the MMTV-PyMT-transgenic mouse model
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- Contribution of the C30/C75 disulfide bond to the biological properties of onconase
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