A cysteine-rich protein from an arthropod stabilizes clotting mesh and immobilizes bacteria at injury sites

Yasuyuki Matsuda, Tsukasa Osaki, Tomoyuki Hashii, Takumi Koshiba, Shun-Ichiro Kawabata

研究成果: ジャーナルへの寄稿記事

20 引用 (Scopus)

抄録

Hemolymph coagulation in arthropods plays key roles in host defense, including sealing wounds to staunch bleeding and immobilizing invading microorganisms. We have previously reported that horseshoe crab transglutaminase (TGase) promotes cross-linking of a clotting protein (coagulin) with hemocyte-derived proteins (proxins), resulting in the formation of stable coagulin fibrils. Here we show that TGase also cross-links proxins to another hemocyte-derived protein named stablin. Stablin is a cysteine-rich protein of 131 residues. Surface plasmon resonance analysis revealed the specific interaction of stablin with proxin-1 at Kd = 4.0 × 10 -9 M. Stablin was predominantly localized in the large granules of hemocytes and secreted by lipopolysaccharide-induced exocytosis. Interestingly, stablin bound to chitin at Kd = 1.5 × 10-8 M, as determined by using a quartz-crystal microbalance. Stablin also interacted with lipopolysaccharides and lipoteichoic acids and exhibited bacterial agglutinating activity against Gram-positive and -negative bacteria. Immunostaining showed that stablin is co-localized with coagulin in the clotting fibrils that effectively trap bacteria. Moreover, an anti-stablin antibody strongly inhibited the proper formation of the clotting fibrils. These data suggest that stablin promotes the formation of the clotting mesh and the immobilization of invading microbes at injury sites. In arthropods, the TGase-mediated cross-linking may play an important role in the initial stage of host defense, wound closure, and healing, as in the case of mammals.

元の言語英語
ページ(範囲)33545-33552
ページ数8
ジャーナルJournal of Biological Chemistry
282
発行部数46
DOI
出版物ステータス出版済み - 11 16 2007

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Arthropod Proteins
Hemocytes
Transglutaminases
Cysteine
Bacteria
Thromboplastin
Arthropods
Wounds and Injuries
Lipopolysaccharides
Proteins
Quartz Crystal Microbalance Techniques
Horseshoe Crabs
Mammals
Chitin
Surface Plasmon Resonance
Hemolymph
Quartz crystal microbalances
Exocytosis
Gram-Positive Bacteria
Surface plasmon resonance

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Cell Biology

これを引用

A cysteine-rich protein from an arthropod stabilizes clotting mesh and immobilizes bacteria at injury sites. / Matsuda, Yasuyuki; Osaki, Tsukasa; Hashii, Tomoyuki; Koshiba, Takumi; Kawabata, Shun-Ichiro.

:: Journal of Biological Chemistry, 巻 282, 番号 46, 16.11.2007, p. 33545-33552.

研究成果: ジャーナルへの寄稿記事

Matsuda, Yasuyuki ; Osaki, Tsukasa ; Hashii, Tomoyuki ; Koshiba, Takumi ; Kawabata, Shun-Ichiro. / A cysteine-rich protein from an arthropod stabilizes clotting mesh and immobilizes bacteria at injury sites. :: Journal of Biological Chemistry. 2007 ; 巻 282, 番号 46. pp. 33545-33552.
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