Mitoguardin-2-mediated lipid transfer preserves mitochondrial morphology and lipid droplet formation.
Mitoguardin-2-mediated lipid transfer preserves mitochondrial morphology and lipid droplet formation.
复制标题
DOI:
10.1083/jcb.202207022
复制
发表时间:
2022-12-05
期刊:
影响因子:
--
通讯作者:
中科院分区:
文献类型:
--
作者:
Mitochondrial protein mitoguardin-2, at contacts with the ER or with lipid droplets (LDs), binds fatty acids and phospholipids, and non-specifically transfers phospholipids between membranes in vitro. Its lipid transfer ability is required for roles in mitochondrial and LD biology. Lipid transport proteins at membrane contacts, where organelles are closely apposed, are critical in redistributing lipids from the endoplasmic reticulum (ER), where they are made, to other cellular membranes. Such protein-mediated transfer is especially important for maintaining organelles disconnected from secretory pathways, like mitochondria. We identify mitoguardin-2, a mitochondrial protein at contacts with the ER and/or lipid droplets (LDs), as a lipid transporter. An x-ray structure shows that the C-terminal domain of mitoguardin-2 has a hydrophobic cavity that binds lipids. Mass spectrometry analysis reveals that both glycerophospholipids and free-fatty acids co-purify with mitoguardin-2 from cells, and that each mitoguardin-2 can accommodate up to two lipids. Mitoguardin-2 transfers glycerophospholipids between membranes in vitro, and this transport ability is required for roles both in mitochondrial and LD biology. While it is not established that protein-mediated transfer at contacts plays a role in LD metabolism, our findings raise the possibility that mitoguardin-2 functions in transporting fatty acids and glycerophospholipids at mitochondria-LD contacts.
登录
查看更多内容
影响因子:
64.8
作者:
Tunyasuvunakool K;Adler J;Wu Z;Green T;Zielinski M;Žídek A;Bridgland A;Cowie A;Meyer C;Laydon A;Velankar S;Kleywegt GJ;Bateman A;Evans R;Pritzel A;Figurnov M;Ronneberger O;Bates R;Kohl SAA;Potapenko A;Ballard AJ;Romera-Paredes B;Nikolov S;Jain R;Clancy E;Reiman D;Petersen S;Senior AW;Kavukcuoglu K;Birney E;Kohli P;Jumper J;Hassabis D
通讯作者:
Hassabis D
DOI:
10.1126/science.aah6171
发表时间:
2017-02-17
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Lees JA;Messa M;Sun EW;Wheeler H;Torta F;Wenk MR;De Camilli P;Reinisch KM
通讯作者:
Reinisch KM
影响因子:
56.9
作者:
von Filseck, Joachim Moser;Copic, Alenka;Drin, Guillaume
通讯作者:
Drin, Guillaume
DOI:
10.1038/s41580-019-0180-9
发表时间:
2020-01
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
21.3
作者:
Saheki Y;Bian X;Schauder CM;Sawaki Y;Surma MA;Klose C;Pincet F;Reinisch KM;De Camilli P
通讯作者:
De Camilli P