PINK1-mediated phosphorylation of LETM1 regulates mitochondrial calcium transport and protects neurons against mitochondrial stress.
PINK1-mediated phosphorylation of LETM1 regulates mitochondrial calcium transport and protects neurons against mitochondrial stress.
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DOI:
10.1038/s41467-017-01435-1
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发表时间:
2017-11-09
影响因子:
16.6
通讯作者:
Park DS
中科院分区:
文献类型:
--
作者:
Huang E;Qu D;Huang T;Rizzi N;Boonying W;Krolak D;Ciana P;Woulfe J;Klein C;Slack RS;Figeys D;Park DS
Mutations in PTEN-induced kinase 1 (PINK1) result in a recessive familial form of Parkinson’s disease (PD). PINK1 loss is associated with mitochondrial Ca2+ mishandling, mitochondrial dysfunction, as well as increased neuronal vulnerability. Here we demonstrate that PINK1 directly interacts with and phosphorylates LETM1 at Thr192 in vitro. Phosphorylated LETM1 or the phospho-mimetic LETM1-T192E increase calcium release in artificial liposomes and facilitates calcium transport in intact mitochondria. Expression of LETM1-T192E but not LETM1-wild type (WT) rescues mitochondrial calcium mishandling in PINK1-deficient neurons. Expression of both LETM1-WT and LETM1-T192E protects neurons against MPP+–MPTP-induced neuronal death in PINK1 WT neurons, whereas only LETM1-T192E protects neurons under conditions of PINK1 loss. Our findings delineate a mechanism by which PINK1 regulates mitochondrial Ca2+ level through LETM1 and suggest a model by which PINK1 loss leads to deficient phosphorylation of LETM1 and impaired mitochondrial Ca2+ transport.. Mutations in the mitochondrial kinase PINK1 result in familial Parkinson’s disease. Here the authors show that LETM1, a mitochondrial inner membrane protein, is a substrate of PINK1 that regulates Ca2+ handling in mitochondria in response to mitochondrial toxins.
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DOI:
10.1083/jcb.201008084
发表时间:
2010-11-29
期刊:
The Journal of cell biology
影响因子:
--
作者:
Jin SM;Lazarou M;Wang C;Kane LA;Narendra DP;Youle RJ
通讯作者:
Youle RJ
影响因子:
4.8
作者:
Becker, Dorothea;Richter, Judith;Voos, Wolfgang
通讯作者:
Voos, Wolfgang
影响因子:
4
作者:
Heeman, Bavo;Van den Haute, Chris;Baekelandt, Veerle
通讯作者:
Baekelandt, Veerle
影响因子:
4.8
作者:
Fallaize D;Chin LS;Li L
通讯作者:
Li L
影响因子:
64.8
作者:
De Stefani, Diego;Raffaello, Anna;Teardo, Enrico;Szabo, Ildiko;Rizzuto, Rosario
通讯作者:
Rizzuto, Rosario