Evidence for ESCRT- and clathrin-dependent microautophagy.
Evidence for ESCRT- and clathrin-dependent microautophagy.
复制标题
DOI:
10.1083/jcb.201611029
复制
发表时间:
2017-10-02
期刊:
影响因子:
--
通讯作者:
Sakai Y
中科院分区:
文献类型:
--
作者:
Oku M;Maeda Y;Kagohashi Y;Kondo T;Yamada M;Fujimoto T;Sakai Y
Microautophagy is a mode of autophagy in which the lysosomal or vacuolar membrane invaginates and engulfs target components. Oku et al. show that, upon a diauxic shift, yeast microautophagy involves recruitment of ESCRT proteins to the vacuolar membrane, including clathrin-interacting Vps27, and uptake of lipid droplets by the vacuole. Microautophagy refers to a mode of autophagy in which the lysosomal or vacuolar membrane invaginates and directly engulfs target components. The molecular machinery of membrane dynamics driving microautophagy is still elusive. Using immunochemical monitoring of yeast vacuolar transmembrane proteins, Vph1 and Pho8, fused to fluorescent proteins, we obtained evidence showing an induction of microautophagy after a diauxic shift in the yeast Saccharomyces cerevisiae. Components of the endosomal sorting complex required for transport machinery were found to be required for this process, and the gateway protein of the machinery, Vps27, was observed to change its localization onto the vacuolar membrane after a diauxic shift. We revealed the functional importance of Vps27’s interaction with clathrin in this microautophagy that also contributed to uptake of lipid droplets into the vacuole. This study sheds light on the molecular mechanism of microautophagy, which does not require the core Atg proteins.
登录
查看更多内容
影响因子:
16
作者:
Dubouloz, F;Deloche, O;De Virgillo, C
通讯作者:
De Virgillo, C
影响因子:
3.3
作者:
Amerik, AY;Nowak, J;Hochstrasser, M
通讯作者:
Hochstrasser, M
影响因子:
3.3
作者:
Krick, R.;Muehe, Y.;Thumm, M.
通讯作者:
Thumm, M.
影响因子:
7.8
作者:
Bilodeau, PS;Winistorfer, SC;Kearney, WR;Robertson, AD;Piper, RC
通讯作者:
Piper, RC
影响因子:
3.3
作者:
Hickey CM;Wickner W
通讯作者:
Wickner W