Mitochondria supply membranes for autophagosome biogenesis during starvation.
Mitochondria supply membranes for autophagosome biogenesis during starvation.
复制标题
DOI:
10.1016/j.cell.2010.04.009
复制
发表时间:
2010-05-14
期刊:
影响因子:
64.5
通讯作者:
Lippincott-Schwartz J
中科院分区:
文献类型:
--
作者:
Hailey DW;Rambold AS;Satpute-Krishnan P;Mitra K;Sougrat R;Kim PK;Lippincott-Schwartz J
Starvation-induced autophagosomes engulf cytosol and/or organelles and deliver them to lysosomes for degradation, thereby re-supplying depleted nutrients. Despite advances in understanding the molecular basis of this process, the membrane origin of autophagosomes remains unclear. Here, we demonstrate that, in starved cells, autophagosomes are derived from the outer membranes of mitochondria. In time-lapse movies, the early autophagosomal marker, mApg5, transiently localizes to punctae on the surface of mitochondria, followed by the late autophagosomal marker, LC3. A unique tail-anchored outer mitochondrial membrane protein, but not other outer nor inner mitochondrial membrane proteins, labels autophagosomes and diffuses into newly forming autophagosomes from mitochondria. The fluorescent lipid, NBD-PS (which converts to PE in mitochondria) transfers from mitochondria to autophagosomes in starved cells. In addition, when mitochondria/ER connections are perturbed by loss of mitofusin2, starvation-induced autophagosomes do not form. Mitochondria thus play a central role in starvation-induced autophagy, serving as membrane source of autophagosomes.
登录
查看更多内容
DOI:
10.1083/jcb.152.4.657
发表时间:
2001-02-19
期刊:
The Journal of cell biology
影响因子:
--
作者:
Mizushima N;Yamamoto A;Hatano M;Kobayashi Y;Kabeya Y;Suzuki K;Tokuhisa T;Ohsumi Y;Yoshimori T
通讯作者:
Yoshimori T
影响因子:
48
作者:
Lorenz, H;Hailey, DW;Lippincott-Schwartz, J
通讯作者:
Lippincott-Schwartz, J
影响因子:
13.3
作者:
Furuya, Norihiko;Yu, Jie;Levine, Beth
通讯作者:
Levine, Beth
影响因子:
64.5
作者:
Nakatogawa, Hitoshi;Ichimura, Yoshinobu;Ohsumi, Yoshinori
通讯作者:
Ohsumi, Yoshinori
影响因子:
4
作者:
Mizushima, N;Kuma, A;Yoshimori, T
通讯作者:
Yoshimori, T