Mechanism of parkin activation by PINK1.
Mechanism of parkin activation by PINK1.
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DOI:
10.1038/s41586-018-0224-x
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发表时间:
2018-07
期刊:
影响因子:
64.8
通讯作者:
Komander D
中科院分区:
文献类型:
--
作者:
Gladkova C;Maslen SL;Skehel JM;Komander D
Mutations in the E3 ubiquitin ligase Parkin (PARK2) and the protein kinase PINK1 (PARK6) are linked to autosomal-recessive juvenile Parkinsonism (AR-JP), and at the cellular level cause defects in mitophagy, the cellular process that organises destruction of damaged mitochondria. Parkin is autoinhibited, and requires activation by PINK1, which phosphorylates Ser65 in ubiquitin and in the Parkin ubiquitin-like (Ubl) domain. Parkin binds phospho-ubiquitin, which enables efficient Parkin phosphorylation, however the enzyme remains autoinhibited with an inaccessible active site. It is unclear how phosphorylation of Parkin activates the molecule. We here follow the activation of full-length human Parkin by hydrogen deuterium exchange mass spectrometry, and reveal large scale domain rearrangement in the activation process, in which the phospho-Ubl rebinds to the Parkin core, and releases the catalytic RING2 domain. A 1.8 Å crystal structure of phosphorylated human Parkin reveals the binding site of the phosphorylated Ubl on the Unique Parkin Domain (UPD), involving a phosphate-binding pocket lined by AR-JP mutations. Strikingly, a conserved linker region between Ubl and UPD acts as an activating element (ACT) that contributes to RING2 release by mimicking RING2 interactions on the UPD, explaining further AR-JP mutations. Our data unveils how autoinhibition in Parkin is resolved, and suggests how Parkin ubiquitinates its substrates via an untethered RING2 domain. This opens exciting new avenues to design Parkin activators for clinical use.
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影响因子:
7.7
作者:
Kazlauskaite A;Martínez-Torres RJ;Wilkie S;Kumar A;Peltier J;Gonzalez A;Johnson C;Zhang J;Hope AG;Peggie M;Trost M;van Aalten DM;Alessi DR;Prescott AR;Knebel A;Walden H;Muqit MM
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Muqit MM
影响因子:
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DOI:
10.1073/pnas.1506593112
发表时间:
2015-05-26
影响因子:
11.1
作者:
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通讯作者:
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通讯作者:
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16
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Ordureau A;Paulo JA;Zhang W;Ahfeldt T;Zhang J;Cohn EF;Hou Z;Heo JM;Rubin LL;Sidhu SS;Gygi SP;Harper JW
通讯作者:
Harper JW