Chondroitin Sulfate Promotes Activation of Cathepsin K

Chondroitin Sulfate Promotes Activation of Cathepsin K
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DOI:
10.1074/jbc.m114.559898
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发表时间:
2014-08-01
影响因子:
4.8
通讯作者:
Duong, Le T.
Duong, Le T.
中科院分区:
生物学2区
文献类型:
--
作者:
Lemaire, Peter A.;Huang, Lingyi;Duong, Le T.

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组织蛋白酶K (CatK)是一种主要的溶酶体胶原酶,由破骨细胞产生,在骨吸收中起重要作用。有证据表明,CatK的胶原酶活性是由硫酸软骨素(CS)促进的,硫酸软骨素是一种硫酸糖胺聚糖。本研究探讨了CS在促进CatK激活中的作用。我们已经证明硫酸软骨素(C4-S)在pH下促进CatK前结构域的自动加工
Cathepsin K (CatK), a major lysosomal collagenase produced by osteoclasts, plays an important role in bone resorption. Evidence exists that the collagenase activity of CatK is promoted by chondroitin sulfate (CS), a sulfated glycosaminoglycan. This study examines the role of CS in facilitating CatK activation. We have demonstrated that chondroitin 4-sulfate (C4-S) promotes autoprocessing of the pro-domain of CatK at pH