Caspase-8 cleavage of the interleukin-21 (IL-21) receptor is a negative feedback regulator of IL-21 signaling

Tatsuya Akagi, Kouhei Shimizu, Shoukichi Takahama, Takahiro Iwasaki, Kazuhiro Sakamaki, Yaeta Endo, Tatsuya Sawasaki

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We screened a library of human single-transmembrane proteins (sTMPs), produced by a cell-free system, using a luminescent assay to identify those that can be cleaved by caspase-8 (CASP8). Of the 407 sTMPs screened, only the interleukin-21 receptor (IL21R), vezatin (VEZT), and carbonic anhydrase XIV were cleaved at Asp344, Asp655 and Asp53, respectively. We confirmed that IL21R and VEZT were also cleaved in apoptotic HeLa cells with the cleavage sites. Interestingly, IL21R was cleaved within 30 min after apoptosis induction. Furthermore the CASP8-cleaved form of IL21R did not induce phosphorylation at Tyr705 of STAT3. Our results suggest that the interleukin-21 signaling cascade is negatively regulated by CASP8.

本文言語English
ページ(範囲)1835-1840
ページ数6
ジャーナルFEBS Letters
585
12
DOI
出版ステータスPublished - 2011 6月 23
外部発表はい

ASJC Scopus subject areas

  • 生物理学
  • 構造生物学
  • 生化学
  • 分子生物学
  • 遺伝学
  • 細胞生物学

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