C9orf72-catalyzed GTP loading of Rab39A enables HOPS-mediated membrane tethering and fusion in mammalian autophagy.
C9orf72-catalyzed GTP loading of Rab39A enables HOPS-mediated membrane tethering and fusion in mammalian autophagy.
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DOI:
10.1038/s41467-023-42003-0
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发表时间:
2023-10-11
影响因子:
16.6
通讯作者:
Zhong, Qing
中科院分区:
文献类型:
--
作者:
Zhang, Shen;Tong, Mindan;Zheng, Denghao;Huang, Huiying;Li, Linsen;Ungermann, Christian;Pan, Yi;Luo, Hanyan;Lei, Ming;Tang, Zaiming;Fu, Wan;Chen, She;Liu, Xiaoxia;Zhong, Qing
The multi-subunit homotypic fusion and vacuole protein sorting (HOPS) membrane-tethering complex is required for autophagosome-lysosome fusion in mammals, yet reconstituting the mammalian HOPS complex remains a challenge. Here we propose a “hook-up” model for mammalian HOPS complex assembly, which requires two HOPS sub-complexes docking on membranes via membrane-associated Rabs. We identify Rab39A as a key small GTPase that recruits HOPS onto autophagic vesicles. Proper pairing with Rab2 and Rab39A enables HOPS complex assembly between proteoliposomes for its tethering function, facilitating efficient membrane fusion. GTP loading of Rab39A is important for the recruitment of HOPS to autophagic membranes. Activation of Rab39A is catalyzed by C9orf72, a guanine exchange factor associated with amyotrophic lateral sclerosis and familial frontotemporal dementia. Constitutive activation of Rab39A can rescue autophagy defects caused by C9orf72 depletion. These results therefore reveal a crucial role for the C9orf72-Rab39A-HOPS axis in autophagosome-lysosome fusion. The HOPS complex mediates membrane tethering and autophagosome-lysosome fusion. Here, the authors biochemically reconstitute the mammalian HOPS in protoliposomes and propose a model of complex assembly that depends on Rab2 and Rab39A.
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影响因子:
64.8
作者:
Diao, Jiajie;Liu, Rong;Rong, Yueguang;Zhao, Minglei;Zhang, Jing;Lai, Ying;Zhou, Qiangjun;Wilz, Livia M.;Li, Jianxu;Vivona, Sandro;Pfuetzner, Richard A.;Brunger, Axel T.;Zhong, Qing
通讯作者:
Zhong, Qing
影响因子:
16
作者:
Ganley IG;Wong PM;Gammoh N;Jiang X
通讯作者:
Jiang X
DOI:
10.1126/science.1254917
发表时间:
2014-09-05
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Kwon I;Xiang S;Kato M;Wu L;Theodoropoulos P;Wang T;Kim J;Yun J;Xie Y;McKnight SL
通讯作者:
McKnight SL
影响因子:
11.4
作者:
ALEXANDROV, K;HORIUCHI, H;ZERIAL, M
通讯作者:
ZERIAL, M
影响因子:
32.4
作者:
Garg S;Sharma M;Ung C;Tuli A;Barral DC;Hava DL;Veerapen N;Besra GS;Hacohen N;Brenner MB
通讯作者:
Brenner MB