Structural basis for RING-Cys-Relay E3 ligase activity and its role in axon integrity.
Structural basis for RING-Cys-Relay E3 ligase activity and its role in axon integrity.
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DOI:
10.1038/s41589-020-0598-6
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发表时间:
2020-11
影响因子:
14.8
通讯作者:
Virdee S
中科院分区:
文献类型:
--
作者:
Mabbitt PD;Loreto A;Déry MA;Fletcher AJ;Stanley M;Pao KC;Wood NT;Coleman MP;Virdee S
MYCBP2 is a ubiquitin (Ub) E3 ligase (E3) that is essential for neurodevelopment and regulates axon maintenance. MYCBP2 transfers Ub to non-lysine substrates via a newly discovered RING-Cys-Relay (RCR) mechanism where Ub is relayed from an upstream cysteine to a downstream substrate esterification site. The molecular bases for E2-E3 Ub transfer and Ub relay are unknown. Whether these activities are linked to the neural phenotypes is also unclear. We describe the crystal structure of a covalently trapped E2-Ub:MYCBP2 transfer intermediate revealing key structural rearrangements upon E2-E3 Ub transfer and Ub relay. Our data suggest that transfer to the dynamic upstream cysteine, whilst mitigating lysine activity, requires a closed-like E2-Ub conjugate with tempered reactivity, and Ub relay is facilitated by a helix-coil transition. Furthermore, neurodevelopmental defects and delayed injury-induced degeneration in RCR-defective knock-in mice suggest its requirement, and that of substrate esterification activity, for normal neural development and programmed axon degeneration.
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DOI:
10.1038/s41583-020-0269-3
发表时间:
2020-04
期刊:
Nature reviews. Neuroscience
影响因子:
--
作者:
Coleman MP;Höke A
通讯作者:
Höke A
影响因子:
16
作者:
Brownell, James E.;Sintchak, Michael D.;Dick, Lawrence R.
通讯作者:
Dick, Lawrence R.
影响因子:
16.6
作者:
Crawley, Oliver;Opperman, Karla J.;Grill, Brock
通讯作者:
Grill, Brock
DOI:
10.1107/s1399004714028132
发表时间:
2015-03
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Afonine PV;Moriarty NW;Mustyakimov M;Sobolev OV;Terwilliger TC;Turk D;Urzhumtsev A;Adams PD
通讯作者:
Adams PD
影响因子:
16.8
作者:
Dou, Hao;Buetow, Lori;Sibbet, Gary J.;Cameron, Kenneth;Huang, Danny T.
通讯作者:
Huang, Danny T.