ABIN-1 is a ubiquitin sensor that restricts cell death and sustains embryonic development.
ABIN-1 is a ubiquitin sensor that restricts cell death and sustains embryonic development.
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DOI:
10.1038/nature07575
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发表时间:
2009-02-12
期刊:
影响因子:
64.8
通讯作者:
Ma, Averil
中科院分区:
文献类型:
--
作者:
Oshima, Shigeru;Turer, Emre E.;Callahan, Joseph A.;Chai, Sophia;Advincula, Rommel;Barrera, Julio;Shifrin, Nataliya;Lee, Bettina;Yen, Benjamin;Woo, Tammy;Malynn, Barbara A.;Ma, Averil
Proteins that directly regulate TNFR signaling play critical roles in regulating cellular activation and survival. A20 Binding and Inhibitor of NFkB (ABIN-1) is a novel protein that is thought to inhibit NFkB signaling. Here we show that mice deficient for ABIN-1 die during embryogenesis with fetal liver apoptosis, anemia and hypoplasia. ABIN-1 deficient cells are hypersensitive to TNF-induced PCD, and TNF deficiency rescues ABIN-1 deficient embryos. ABIN-1 inhibits caspase 8 recruitment to FADD in TNF-induced signaling complexes, preventing caspase 8 cleavage and PCD. Moreover, ABIN-1 directly binds polyubiquitin chains and this ubiquitin sensing activity is required for ABIN-1’s anti-apoptotic activity. These studies provide new insights into how ubiquitination and ubiquitin sensing proteins regulate cellular and organismal survival.
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