Insights into Cullin-RING E3 ubiquitin ligase recruitment: structure of the VHL-EloBC-Cul2 complex.

Insights into Cullin-RING E3 ubiquitin ligase recruitment: structure of the VHL-EloBC-Cul2 complex.
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DOI:
10.1016/j.str.2014.12.014
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发表时间:
2015-03-03
期刊:
影响因子:
5.7
通讯作者:
Xiong, Yong
Xiong, Yong
中科院分区:
生物学2区
文献类型:
--
作者:
Nguyen, Henry C.;Yang, Haitao;Fribourgh, Jennifer L.;Wolfe, Leslie S.;Xiong, Yong

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von Hippel-Lindau肿瘤抑制蛋白(VHL)招募Cullin 2 (Cul2) E3泛素连接酶下调HIF-1α, HIF-1α是缺氧反应的重要转录因子。VHL的突变可导致VHL疾病和肾细胞癌。抑制这一途径上调促红细胞生成素的产生是治疗缺血和慢性贫血的一种很有前景的新疗法。本文报道了与Cul2 n端结构域结合的VHL的晶体结构,长链蛋白B (EloB)和长链蛋白C (EloC)。Cul2与VHL BC盒和cullin盒以及一个新的EloC位点相互作用。与其他cullin E3连接酶结构的比较表明,cullin E3有一个保守但灵活的cullin识别模块,cullin选择性受到不同的静电相互作用的影响。我们的结构为研究VHL疾病的发病机制和设计可能调节cullin -底物受体相互作用的新化合物提供了结构基础。
The von Hippel-Lindau tumor suppressor protein (VHL) recruits a Cullin 2 (Cul2) E3 ubiquitin ligase to downregulate HIF-1α, an essential transcription factor for the hypoxia response. Mutations in VHL lead to VHL disease and renal cell carcinomas. Inhibition of this pathway to upregulate erythropoietin production is a promising new therapy to treat ischemia and chronic anemia. Here we report the crystal structure of VHL bound to a Cul2 N-terminal domain, Elongin B (EloB), and Elongin C (EloC). Cul2 interacts with both the VHL BC box and cullin box and a novel EloC site. Comparison to other cullin E3 ligase structures shows that there is a conserved, yet flexible, cullin recognition module and that cullin selectivity is influenced by distinct electrostatic interactions. Our structure provides a structural basis for the study of the pathogenesis of VHL disease and the rationale design of novel compounds that may modulate cullin–substrate receptor interactions.
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