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Biochemical characterization of human kallikrein 8 and its possible involvement in the degradation of extracellular matrix proteins

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タイトル: Biochemical characterization of human kallikrein 8 and its possible involvement in the degradation of extracellular matrix proteins
著者: Rajapakse, Sanath 著作を一覧する
Ogiwara, Katsueki 著作を一覧する
Takano, Naoharu 著作を一覧する
Moriyama, Akihiko 著作を一覧する
Takahashi, Takayuki 著作を一覧する
キーワード: Human kallikrein 8
Enzymatic characterization
Extracellular matrix proteins
Tissue-type plasminogen activator
発行日: 2005年12月 1日
出版者: Elsevier B.V.
誌名: Febs Letters
巻: 579
号: 30
開始ページ: 6879
終了ページ: 6884
出版社 DOI: 10.1016/j.febslet.2005.11.039
抄録: Human kallikrein 8 (KLK8) is a member of the human kallikrein gene family of serine proteases, and its protein, hK8, has recently been suggested to serve as a new ovarian cancer marker. To gain insights into the physiological role of hK8, the active recombinant enzyme was obtained in a pure state for biochemical and enzymatic characterizations. hK8 had trypsin-like activity with a strong preference for Arg over Lys in the P1 position, and its activity was inhibited by typical serine protease inhibitors. The protease degraded casein, fibronectin, gelatin, collagen type IV, fibrinogen, and high-molecular-weight kininogen. hK8 also converted human single-chain tissue-type plasminogen activator (65 kDa) to its two-chain form (32 and 33 kDa) by specifically cleaving the peptide bond Arg275–Ile276. This conversion resulted in a drastic increase in the activity of the activator toward the fluorogenic substrate Pyr-Gly-Arg-MCA and plasminogen in the absence of fibrin. Our findings suggest that hK8 may be implicated in ECM protein degradation in the area surrounding hK8-producing cells.
Relation (URI): http://www.sciencedirect.com/science/journal/00145793
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/985
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 高橋 孝行

 

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