Drosophila IKK-Related Kinase Regulates Nonapoptotic Function of Caspases via Degradation of IAPs

Erina Kuranaga, Hirotaka Kanuka, Ayako Tonoki, Kiwamu Takemoto, Takeyasu Tomioka, Masatomo Kobayashi, Shigeo Hayashi, Masayuki Miura

研究成果: Article査読

112 被引用数 (Scopus)

抄録

Caspase activation has been extensively studied in the context of apoptosis. However, caspases also control other cellular functions, although the mechanisms regulating caspases in nonapoptotic contexts remain obscure. Drosophila IAP1 (DIAP1) is an endogenous caspase inhibitor that is crucial for regulating cell death during development. Here we describe Drosophila IKK-related kinase (DmIKKε) as a regulator of caspase activation in a nonapoptotic context. We show that DmIKKε promotes degradation of DIAP1 through direct phosphorylation. Knockdown of DmIKKε in the proneural clusters of the wing imaginal disc, in which nonapoptotic caspase activity is required for proper sensory organ precursor (SOP) development, stabilizes endogenous DIAP1 and affects Drosophila SOP development. Our results demonstrate that DmIKKε is a determinant of DIAP1 protein levels and that it establishes the threshold of activity required for the execution of nonapoptotic caspase functions.

本文言語English
ページ(範囲)583-596
ページ数14
ジャーナルCell
126
3
DOI
出版ステータスPublished - 2006 8月 4
外部発表はい

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)

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