DOCK2 regulates Rac activation and cytoskeletal reorganization through interaction with ELMO1

Terukazu Sanui, Ayumi Inayoshi, Mayuko Noda, Eiko Iwata, Jens V. Stein, Takehiko Sasazuki, Yoshinori Fukui

研究成果: ジャーナルへの寄稿学術誌査読

89 被引用数 (Scopus)


Although the migratory property of lymphocytes is critical for protective immunity, tissue infiltration of lymphocytes sometimes causes harmful immune responses. DOCK2 plays a critical role in lymphocyte migration by regulating actin cytoskeleton through Rac activation, yet the mechanism by which DOCK2 activates Rac remains unknown. We found that DOCK2 associates with engulfment and cell motility (ELMO1) through its Src-homology 3 (SH3) domain. When DOCK2 was expressed in T-hybridoma cells lacking endogenous expression of DOCK2, Rac activation and actin polymerization were induced. However, such responses were not elicited by the DOCK2 mutant lacking the region required for ELMO1 binding. On the other hand, we found that the expression of ELMO1 induces Rac activation in the plasmacytoma cells expressing DOCK2 but not ELMO1. These results indicate that the association of DOCK2 with ELMO1 is critical for DOCK2-mediated Rac activation, thereby suggesting that their association might be a therapeutic target for immunologic disorders caused by lymphocyte infiltration.

出版ステータス出版済み - 10月 15 2003

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 免疫学
  • 血液学
  • 細胞生物学


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