A plant Bro1 domain protein BRAF regulates multivesicular body biogenesis and membrane protein homeostasis.

A plant Bro1 domain protein BRAF regulates multivesicular body biogenesis and membrane protein homeostasis.
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植物 Bro1 结构域蛋白 BRAF 调节多泡体生物发生和膜蛋白稳态

DOI:
10.1038/s41467-018-05913-y
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发表时间:
2018-09-17
影响因子:
16.6
通讯作者:
Jiang L
Jiang L
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Shen J;Zhao Q;Wang X;Gao C;Zhu Y;Zeng Y;Jiang L

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植物的发育、防御和许多生理过程都依赖于内体转运所需的分选复合物(ESCRT)机制,通过选择性液泡降解来控制膜蛋白的稳态。虽然ESCRT核心成分在高等真核生物中是保守的,但控制ESCRT机制功能的调节剂仍然难以捉摸。我们最近确定了一个植物特异性ESCRT组件,FREE 1,这是必不可少的多泡体/prevacuolar隔间(MVB/PVC)的生物发生和液泡膜蛋白的分选。在这里,我们确定了一种植物特异性的Bro 1结构域蛋白BRAF,它通过竞争性结合ESCRT-I组分Vps 23来调节FREE 1向MVB/PVC膜的募集。总之,我们已经成功地确定了BRAF的作用,其功能作为一个独特的进化ESCRT调节器,在编排管腔内囊泡形成MVB/PVC和分类的膜蛋白降解在植物中,使其成为一个重要的监管机制,在高等真核生物的ESCRT机器。
Plant development, defense, and many physiological processes rely on the endosomal sorting complex required for transport (ESCRT) machinery to control the homeostasis of membrane proteins by selective vacuolar degradation. Although ESCRT core components are conserved among higher eukaryotes, the regulators that control the function of the ESCRT machinery remain elusive. We recently identified a plant-specific ESCRT component, FREE1, that is essential for multivesicular body/prevacuolar compartment (MVB/PVC) biogenesis and vacuolar sorting of membrane proteins. Here we identify a plant-specific Bro1-domain protein BRAF, which regulates FREE1 recruitment to the MVB/PVC membrane by competitively binding to the ESCRT-I component Vps23. Altogether, we have successfully identified a role for BRAF, whose function as a unique evolutionary ESCRT regulator in orchestrating intraluminal vesicle formation in MVB/PVCs and the sorting of membrane proteins for degradation in plants makes it an important regulatory mechanism underlying the ESCRT machinery in higher eukaryotes.
DOI: 10.3389/fpls.2017.00346
发表时间: 2017
影响因子: 5.6
作者:
Li Y;Qi B
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发表时间: 2016-09-01
期刊: PLANT CELL
影响因子: 11.6
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发表时间: 2008-01-11
期刊: PLANT METHODS
影响因子: 5.1
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