DOCK8 protein regulates macrophage migration through Cdc42 protein activation and LRAP35a protein interaction

Akira Shiraishi, Takehito Uruno, Fumiyuki Sanematsu, Miho Ushijima, Daiji Sakata, Toshiro Hara, Yoshinori Fukui

研究成果: Contribution to journalArticle査読

14 被引用数 (Scopus)

抄録

DOCK8 is an atypical guanine nucleotide exchange factor for Cdc42, and its mutations cause combined immunodeficiency in humans. Accumulating evidence indicates that DOCK8 regulates the migration and activation of various subsets of leukocytes, but its regulatory mechanism is poorly understood. We here report that DOCK8-deficient macrophages exhibit a migration defect in a 2D setting. Although DOCK8 deficiency in macrophages did not affect the global Cdc42 activation induced by chemokine stimulation, rescue experiments revealed that the guanine nucleotide exchange factor activity of DOCK8 was required for macrophage migration. We found that DOCK8 associated with LRAP35a, an adaptor molecule that binds to the Cdc42 effector myotonic dystrophy kinase-related Cdc42-binding kinase, and facilitated its activity to phosphorylate myosin II regulatory light chain. When this interaction was disrupted in WT macrophages, they showed a migration defect, as seen in DOCK8-deficient macrophages. These results suggest that, during macrophage migration, DOCK8 links Cdc42 activation to actomyosin dynamics through the association with LRAP35a.

本文言語英語
ページ(範囲)2191-2202
ページ数12
ジャーナルJournal of Biological Chemistry
292
6
DOI
出版ステータス出版済み - 2 10 2017

All Science Journal Classification (ASJC) codes

  • 生化学
  • 分子生物学
  • 細胞生物学

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