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
Ma, Averil
中科院分区:
综合性期刊1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

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直接调节TNFR信号转导的蛋白质在调节细胞激活和存活方面起着关键作用。A20结合和抑制NFkB(ABIN-1)是一种新的蛋白质,被认为抑制NFkB信号转导。在这里,我们展示了ABIN-1基因缺失的小鼠在胚胎发育过程中死亡,并伴有胎肝细胞凋亡、贫血和发育不全。Abin-1缺陷细胞对肿瘤坏死因子诱导的PCD高度敏感,而肿瘤坏死因子缺陷挽救了ABIN-1缺陷胚胎。Abin-1在肿瘤坏死因子诱导的信号复合体中抑制caspase8向FADD的募集,阻止caspase8的裂解和PCD。此外,ABIN-1直接与多泛素链结合,这种泛素传感活性是ABIN-1‘S抗细胞凋亡活性所必需的。这些研究为泛素化和泛素传感蛋白如何调控细胞和有机体的生存提供了新的见解。
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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