Septins and K63 ubiquitin chains are present in separate bacterial microdomains during autophagy of entrapped Shigella.
Septins and K63 ubiquitin chains are present in separate bacterial microdomains during autophagy of entrapped Shigella.
复制标题
DOI:
10.1242/jcs.261139
复制
发表时间:
2023-04-01
影响因子:
4
通讯作者:
Mostowy S
中科院分区:
文献类型:
--
作者:
Lobato-Márquez D;Conesa JJ;López-Jiménez AT;Divine ME;Pruneda JN;Mostowy S
During host cell invasion, Shigella escapes to the cytosol and polymerizes actin for cell-to-cell spread. To restrict cell-to-cell spread, host cells employ cell-autonomous immune responses including antibacterial autophagy and septin cage entrapment. How septins interact with the autophagy process to target Shigella for destruction is poorly understood. Here, we employed a correlative light and cryo-soft X-ray tomography (cryo-SXT) pipeline to study Shigella septin cage entrapment in its near-native state. Quantitative cryo-SXT showed that Shigella fragments mitochondria and enabled visualization of X-ray-dense structures (∼30 nm resolution) surrounding Shigella entrapped in septin cages. Using Airyscan confocal microscopy, we observed lysine 63 (K63)-linked ubiquitin chains decorating septin-cage-entrapped Shigella. Remarkably, septins and K63 chains are present in separate bacterial microdomains, indicating they are recruited separately during antibacterial autophagy. Cryo-SXT and live-cell imaging revealed an interaction between septins and LC3B-positive membranes during autophagy of Shigella. Together, these findings demonstrate how septin-caged Shigella are targeted for autophagy and provide fundamental insights into autophagy–cytoskeleton interactions. Summary: Our combination of super resolution microscopy and cryo-soft X ray tomography provides fundamental insights into how septin cage entrapment of Shigella is coordinated with ubiquitin-mediated autophagy.
登录
查看更多内容
影响因子:
30.3
作者:
Huett A;Heath RJ;Begun J;Sassi SO;Baxt LA;Vyas JM;Goldberg MB;Xavier RJ
通讯作者:
Xavier RJ
影响因子:
8.8
作者:
Heath RJ;Goel G;Baxt LA;Rush JS;Mohanan V;Paulus GLC;Jani V;Lassen KG;Xavier RJ
通讯作者:
Xavier RJ
影响因子:
4.6
作者:
Conesa JJ;Otón J;Chiappi M;Carazo JM;Pereiro E;Chichón FJ;Carrascosa JL
通讯作者:
Carrascosa JL
影响因子:
4
作者:
Barve, Gaurav;Sridhar, Shreyas;Manjithaya, Ravi
通讯作者:
Manjithaya, Ravi
影响因子:
--
作者:
Groen, J;Conesa, J J;Pereiro, E
通讯作者:
Pereiro, E