Identification and characterization of the linear region of ATG3 that interacts with ATG7 in higher eukaryotes.

Identification and characterization of the linear region of ATG3 that interacts with ATG7 in higher eukaryotes.
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高等真核生物中 ATG3 与 ATG7 相互作用的线性区域的鉴定和表征。

DOI:
10.1016/j.bbrc.2015.05.107
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发表时间:
2015
影响因子:
3.1
通讯作者:
Otomo,Takanori
Otomo,Takanori
中科院分区:
生物学4区
文献类型:
--
作者:
Ohashi,Kazuto;Otomo,Takanori

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GABARAP硫酯从E1 ATG 7转移到E2 ATG 3需要ATG 7的N-末端结构域和ATG 3的柔性区(FR)之间的相互作用。这种相互作用已经在酵母Atg 7-Atg 3复合物晶体结构中可视化,但在高等真核生物中仍有待定义。在这里,我们的NMR数据精确地定义了与ATG 7(RIA 7)相互作用的人ATG 3的FR区域,并证明RIA 7与E3相互作用区域部分重叠,解释了E1-E2和E2-E3相互作用是如何相互排斥的。突变分析确定了E1相互作用和GABARAP转移的RIA 7的关键残基,推进了我们对高等真核生物中自噬共轭级联的分子机制的理解。
Transfer of GABARAP thioester from the E1 ATG7 to the E2 ATG3 requires the interaction between the N-terminal domain of ATG7 and the flexible region (FR) of ATG3. This interaction has been visualized in the yeast Atg7-Atg3 complex crystal structure, but remains to be defined in higher eukaryotes. Here, our NMR data precisely define the region of the FR of human ATG3 that interacts with ATG7 (RIA7) and demonstrate RIA7 partially overlaps with the E3-interacting region, explaining how the E1-E2 and E2-E3 interactions are mutually exclusive. Mutational analyses identify critical residues of the RIA7 for the E1 interaction and GABARAP transfer, advancing our understanding of a molecular mechanism of the autophagic conjugation cascade in higher eukaryotes.
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发表时间: 2000-11-23
期刊: NATURE
影响因子: 64.8
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