Seipin forms a flexible cage at lipid droplet formation sites.
Seipin forms a flexible cage at lipid droplet formation sites.
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DOI:
10.1038/s41594-021-00718-y
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发表时间:
2022-03
影响因子:
16.8
通讯作者:
Walther TC
中科院分区:
文献类型:
--
作者:
Arlt H;Sui X;Folger B;Adams C;Chen X;Remme R;Hamprecht FA;DiMaio F;Liao M;Goodman JM;Farese RV Jr;Walther TC
Lipid droplets (LDs) form in the endoplasmic reticulum by phase separation of neutral lipids. This process is facilitated by the seipin protein complex, which consists of a ring of seipin monomers, with a yet unclear function. Here, we report a structure of S. cerevisiae seipin based on cryogenic-electron microscopy and structural modeling data. Seipin forms a decameric, cage-like structure with the lumenal domains forming a stable ring at the cage floor and transmembrane segments forming the cage sides and top. The transmembrane segments interact with adjacent monomers in two distinct, alternating conformations. These conformations result from changes in switch regions, located between the lumenal domains and the transmembrane segments, that are required for seipin function. Our data indicate a model for LD formation in which a closed seipin cage enables triacylglycerol phase separation and subsequently switches to an open conformation to allow LD growth and budding. Arlt et al. report a structure of yeast seipin, a lipid droplet formation protein, and suggest that it forms a flexible, oligomeric cage in the endoplasmic reticulum membrane, enabling triacylglycerol phase separation, lipid droplet growth and budding toward the cytoplasm.
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影响因子:
14.8
作者:
Kelley LA;Mezulis S;Yates CM;Wass MN;Sternberg MJ
通讯作者:
Sternberg MJ
DOI:
10.1083/jcb.202006111
发表时间:
2020-10-05
期刊:
The Journal of cell biology
影响因子:
--
作者:
Becuwe M;Bond LM;Pinto AFM;Boland S;Mejhert N;Elliott SD;Cicconet M;Graham MM;Liu XN;Ilkayeva O;Saghatelian A;Walther TC;Farese RV Jr
通讯作者:
Farese RV Jr
影响因子:
64.8
作者:
Jumper J;Evans R;Pritzel A;Green T;Figurnov M;Ronneberger O;Tunyasuvunakool K;Bates R;Žídek A;Potapenko A;Bridgland A;Meyer C;Kohl SAA;Ballard AJ;Cowie A;Romera-Paredes B;Nikolov S;Jain R;Adler J;Back T;Petersen S;Reiman D;Clancy E;Zielinski M;Steinegger M;Pacholska M;Berghammer T;Bodenstein S;Silver D;Vinyals O;Senior AW;Kavukcuoglu K;Kohli P;Hassabis D
通讯作者:
Hassabis D
影响因子:
48
作者:
Kucukelbir, Alp;Sigworth, Fred J.;Tagare, Hemant D.
通讯作者:
Tagare, Hemant D.
影响因子:
11.4
作者:
Ding, Long;Yang, Xiao;Huang, Xun
通讯作者:
Huang, Xun