ATG8 蛋白的非典型共轭作用在植物应对热胁迫中的新作用。

IF 14.6 1区 生物学 Q1 CELL BIOLOGY
Autophagy Pub Date : 2024-04-01 Epub Date: 2023-05-31 DOI:10.1080/15548627.2023.2219161
Xuanang Zheng, Siyu Chen, Caiji Gao, Jun Zhou
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引用次数: 0

摘要

ATG8(自噬相关蛋白8)蛋白家族的成员可与单个膜结合的细胞器非共轭。人们对 ATG8 在这些单层膜上的确切功能仍然知之甚少。最近,我们以拟南芥为模型系统,发现了ATG8在热胁迫时参与高尔基体重建的非规范共轭途径。短时间的急性热胁迫导致高尔基体迅速泡化,并伴随着 ATG8 蛋白(ATG8a 至 ATG8i)向扩张的细胞器转位。更重要的是,我们发现 ATG8 蛋白可以招募凝集素,通过刺激 ATG8 阳性囊泡从扩张的贮液器中出芽来促进高尔基体的重新组装。这些发现为了解 ATG8 易位到单个膜细胞器上的可能功能之一提供了新的视角,并将有助于更好地理解 ATG8 在真核细胞中的非经典共轭作用:缩写:ADS,AIMs对接位点;AIM,ATG8-interacting motif;ATG,自噬相关;CLC2,Clathrin轻链2;ConcA,康那霉素A;HS,热应激;PE,磷脂酰乙醇胺;PM,质膜;PS,磷脂酰丝氨酸;TGN,跨高尔基网络;V-ATPase,空泡型ATPase。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An emerging role of non-canonical conjugation of ATG8 proteins in plant response to heat stress.

Members of the ATG8 (autophagy-related protein 8) protein family can be non-canonically conjugated to single membrane-bound organelles. The exact function of ATG8 on these single membranes remains poorly understood. Recently, using Arabidopsis thaliana as a model system, we identified a non-canonical conjugation of ATG8 pathway involved in the reconstruction of the Golgi apparatus upon heat stress. Short acute heat stress resulted in rapid vesiculation of the Golgi, which was accompanied with the translocation of ATG8 proteins (ATG8a to ATG8i) to the dilated cisternae. More importantly, we found that ATG8 proteins can recruit clathrin to facilitate Golgi reassembly by stimulating the budding of ATG8-positive vesicles from dilated cisternae. These findings provide new insight into one of the possible functions of ATG8 translocation onto single membrane organelles, and will contribute to a better understanding of non-canonical conjugation of ATG8 in eukaryotic cells.Abbreviations: ADS, AIMs docking site; AIM, ATG8-interacting motif; ATG, autophagy-related; CLC2, Clathrin light chain 2; ConcA, concanamycin A; HS, heat stress; PE, phosphatidylethanolamine; PM, plasma membrane; PS, phosphatidylserine; TGN, trans-Golgi network; V-ATPase, vacuolar-type ATPase.

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来源期刊
Autophagy
Autophagy 生物-细胞生物学
CiteScore
21.30
自引率
2.30%
发文量
277
审稿时长
1 months
期刊介绍: Autophagy is a peer-reviewed journal that publishes research on autophagic processes, including the lysosome/vacuole dependent degradation of intracellular material. It aims to be the premier journal in the field and covers various connections between autophagy and human health and disease, such as cancer, neurodegeneration, aging, diabetes, myopathies, and heart disease. Autophagy is interested in all experimental systems, from yeast to human. Suggestions for specialized topics are welcome. The journal accepts the following types of articles: Original research, Reviews, Technical papers, Brief Reports, Addenda, Letters to the Editor, Commentaries and Views, and Articles on science and art. Autophagy is abstracted/indexed in Adis International Ltd (Reactions Weekly), EBSCOhost (Biological Abstracts), Elsevier BV (EMBASE and Scopus), PubMed, Biological Abstracts, Science Citation Index Expanded, Web of Science, and MEDLINE.
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