酰基辅酶 A 结合域蛋白 3(ACBD3)将蛋白磷酸酶 PPM1L 招募到内质网-高尔基体膜接触位点。

Acyl-CoA binding domain containing 3 (ACBD3) recruits the protein phosphatase PPM1L to ER-Golgi membrane contact sites.

机构信息

Department of Biochemistry, Institute of Development, Aging and Cancer, Tohoku University, Japan.

出版信息

FEBS Lett. 2012 Sep 21;586(19):3024-9. doi: 10.1016/j.febslet.2012.06.050. Epub 2012 Jul 10.

Abstract

The metal-dependent protein phosphatase family (PPM) governs a number of signaling pathways. PPM1L, originally identified as a negative regulator of stress-activated protein kinase signaling, was recently shown to be involved in the regulation of ceramide trafficking at ER-Golgi membrane contact sites. Here, we identified acyl-CoA binding domain containing 3 (ACBD3) as an interacting partner of PPM1L. We showed that this association, which recruits PPM1L to ER-Golgi membrane contact sites, is mediated by a GOLD (Golgi dynamics) domain in ACBD3. These results suggested that ACBD3 plays a pivotal role in ceramide transport regulation at the ER-Golgi interface.

摘要

金属依赖的蛋白磷酸酶家族(PPM)调控着许多信号通路。PPM1L 最初被鉴定为应激激活蛋白激酶信号的负调控因子,最近的研究表明其参与调控内质网-高尔基体膜接触部位的神经酰胺转运。在这里,我们鉴定酰基辅酶 A 结合域蛋白 3(ACBD3)为 PPM1L 的相互作用伙伴。我们发现这种关联将 PPM1L 募集到内质网-高尔基体膜接触部位,是由 ACBD3 中的 GOLD(高尔基体动力学)结构域介导的。这些结果表明,ACBD3 在 ER-Golgi 界面处的神经酰胺转运调控中发挥关键作用。

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