Drosophila Kelch functions with Cullin-3 to organize the ring canal actin cytoskeleton.

Drosophila Kelch functions with Cullin-3 to organize the ring canal actin cytoskeleton.
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DOI:
10.1083/jcb.200909017
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发表时间:
2010-01-11
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Cooley L
Cooley L
中科院分区:
其他
文献类型:
--
作者:
Hudson AM;Cooley L

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除了交联f -肌动蛋白外,果蝇Kelch也是卵发生过程中环管形态发生所必需的cullin-RING泛素连接酶复合物的一个组成部分。黑腹果蝇Kelch (Drosophila melanogaster Kelch)是一个由被称为KEL repeat (KREP)的重复序列基序定义的多种蛋白质家族的创始成员。包括果蝇KEL在内的几种KREP蛋白结合丝状肌动蛋白(F-actin)并促进其组织。最近,KREP蛋白的一个子集被证明是cullin-RING(非常有趣的新基因)泛素E3连接酶的底物衔接蛋白。在这项研究中,我们证明了果蝇KEL与Cullin-3的关联,可能在cullin-RING连接酶中,对果蝇雌性生殖系环管的生长至关重要。这些结果表明蛋白质泛素化在复杂的f -肌动蛋白细胞骨架结构的重塑中的作用。
In addition to cross-linking F-actin, Drosophila Kelch is a component of a cullin-RING ubiquitin ligase complex required for morphogenesis of ring canals during oogenesis. Drosophila melanogaster Kelch (KEL) is the founding member of a diverse protein family defined by a repeated sequence motif known as the KEL repeat (KREP). Several KREP proteins, including Drosophila KEL, bind filamentous actin (F-actin) and contribute to its organization. Recently, a subset of KREP proteins has been shown to function as substrate adaptor proteins for cullin-RING (really interesting new gene) ubiquitin E3 ligases. In this study, we demonstrate that association of Drosophila KEL with Cullin-3, likely in a cullin-RING ligase, is essential for the growth of Drosophila female germline ring canals. These results suggest a role for protein ubiquitylation in the remodeling of a complex F-actin cytoskeletal structure.
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