The stomatin-like protein SLP-1 and Cdk2 interact with the F-Box protein Fbw7-γ.

The stomatin-like protein SLP-1 and Cdk2 interact with the F-Box protein Fbw7-γ.
复制标题

DOI:
10.1371/journal.pone.0047736
复制
发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Koepp DM
Koepp DM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhang W;MacDonald EM;Koepp DM

文献摘要

参考文献

相似文献

细胞增殖的控制对于细胞活力至关重要。 F-box 蛋白 Fbw7 (hAgo/hCdc4/FBXW7) 作为 Skp1-Cul1-F-box 蛋白 (SCF) 泛素连接酶复合物的特异性因子,并靶向细胞增殖所需的几种蛋白质,以实现泛素介导的破坏。 Fbw7 以三种剪接变体形式存在,但每种剪接变体的机制作用尚不完全清楚。我们检查了 Fbw7-γ 同工型的调节,该亚型与 c-Myc 的降解有关。我们在此表明​​ Fbw7-γ 是一种不稳定的蛋白质,其转换在转化细胞中依赖于蛋白酶体。使用双杂交筛选,我们鉴定了一种新的相互作用伴侣 SLP-1,它结合 Fbw7-γ 的 N 端结构域。 SLP-1 的过度表达会抑制 Fbw7-γ 的降解,表明这种相互作用可以在体内发生。当 Fbw7-γ 通过 SLP-1 的过表达而稳定时,c-Myc 蛋白丰度降低,表明 SCFFbw7-γ 复合物保持活性。我们证明 Cdk2 还结合 Fbw7-γ 以及 SLP-1 的 N 端结构域。有趣的是,Cdk2 和 SLP-1 的共表达不会抑制 Fbw7-γ 降解,表明 Cdk2 和 SLP-1 可能具有相反的功能。
Control of cellular proliferation is critical to cell viability. The F-box protein Fbw7 (hAgo/hCdc4/FBXW7) functions as a specificity factor for the Skp1-Cul1-F-box protein (SCF) ubiquitin ligase complex and targets several proteins required for cellular proliferation for ubiquitin-mediated destruction. Fbw7 exists as three splice variants but the mechanistic role of each is not entirely clear. We examined the regulation of the Fbw7-γ isoform, which has been implicated in the degradation of c-Myc. We show here that Fbw7-γ is an unstable protein and that its turnover is proteasome-dependent in transformed cells. Using a two-hybrid screen, we identified a novel interaction partner, SLP-1, which binds the N-terminal domain of Fbw7-γ. Overexpression of SLP-1 inhibits the degradation of Fbw7-γ, suggesting that this interaction can happen in vivo. When Fbw7-γ is stabilized by overexpression of SLP-1, c-Myc protein abundance decreases, suggesting that the SCFFbw7-γ complex maintains activity. We demonstrate that Cdk2 also binds the N-terminal domain of Fbw7-γ as well as SLP-1. Interestingly, co-expression of Cdk2 and SLP-1 does not inhibit Fbw7-γ degradation, suggesting that Cdk2 and SLP-1 may have opposing functions.
DOI: 10.1038/35095076
发表时间: 2001-09-20
期刊: NATURE
影响因子: 64.8
作者:
Strohmaier, H;Spruck, CH;Reed, SI
通讯作者: Reed, SI
DOI: 10.1016/j.cmet.2005.04.010
发表时间: 2005-06-01
期刊: CELL METABOLISM
影响因子: 29
作者:
Sundqvist, A;Bengoechea-Alonso, MT;Ericsson, J
通讯作者: Ericsson, J
DOI: 10.1186/1471-2148-8-44
发表时间: 2008-02-11
影响因子: 3.4
作者:
Green, Jasper B.;Young, J. Peter W.
通讯作者: Young, J. Peter W.
DOI: 10.1016/j.molcel.2007.02.022
发表时间: 2007-04-13
期刊: MOLECULAR CELL
影响因子: 16
作者:
Hao, Bing;Oehlmann, Stephanie;Pavletich, Nikola P.
通讯作者: Pavletich, Nikola P.
DOI: 10.1126/science.1092880
发表时间: 2004-02-27
期刊: SCIENCE
影响因子: 56.9
作者:
Nateri, AS;Riera-Sans, L;Behrens, A
通讯作者: Behrens, A