Signal-transducing adaptor protein-2 modulates fas-mediated T cell apoptosis by interacting with caspase-8

Yuichi Sekine, Chikako Yamamoto, Michinori Kakisaka, Ryuta Muromoto, Shigeyuki Kon, Dai Ashitomi, Natsuko Fujita, Akihiko Yoshimura, Kenji Oritani, Tadashi Matsuda

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We found that an adaptor protein, signal-transducing adaptor protein (STAP)-2, is a new member of the Fas-death-inducing signaling complex and participates in activation-induced cell death in T cells. STAP-2 enhanced Fas-mediated apoptosis and caspase-8 aggregation and activation in Jurkat T cells. Importantly, STAP-2 directly interacted with caspase-8 and Fas, resulting in enhanced interactions between caspase-8 and FADD in the Fas-death-inducing signaling complex. Moreover, STAP-2 protein has a consensus caspase-8 cleavage sequence, VEAD, in its C-terminal domain, and processing of STAP-2 by caspase-8 was crucial for Fas-induced apoptosis. Physiologic roles of STAP-2 were confirmed by observations that STAP-2-deficient mice displayed impaired activation-induced cell death and superantigen-induced T cell depletion. Therefore, STAP-2 is a novel participant in the regulation of T cell apoptosis after stimulation.

本文言語English
ページ(範囲)6194-6204
ページ数11
ジャーナルJournal of Immunology
188
12
DOI
出版ステータスPublished - 2012 6 15

ASJC Scopus subject areas

  • 免疫アレルギー学
  • 免疫学

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