دورية أكاديمية
Recruitment dynamics of ESCRT-III and Vps4 to endosomes and implications for reverse membrane budding
| العنوان: | Recruitment dynamics of ESCRT-III and Vps4 to endosomes and implications for reverse membrane budding |
|---|---|
| المؤلفون: | Manuel Alonso Y Adell, Simona M Migliano, Srigokul Upadhyayula, Yury S Bykov, Simon Sprenger, Mehrshad Pakdel, Georg F Vogel, Gloria Jih, Wesley Skillern, Reza Behrouzi, Markus Babst, Oliver Schmidt, Michael W Hess, John AG Briggs, Tomas Kirchhausen, David Teis |
| المصدر: | eLife, Vol 6 (2017) |
| بيانات النشر: | eLife Sciences Publications Ltd, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Medicine LCC:Science LCC:Biology (General) |
| مصطلحات موضوعية: | ESCRT, endosomes, membrane budding, lattice light sheet microscopy, 3D tracking, electron tomography, Medicine, Science, Biology (General), QH301-705.5 |
| الوصف: | The ESCRT machinery mediates reverse membrane scission. By quantitative fluorescence lattice light-sheet microscopy, we have shown that ESCRT-III subunits polymerize rapidly on yeast endosomes, together with the recruitment of at least two Vps4 hexamers. During their 3–45 s lifetimes, the ESCRT-III assemblies accumulated 75–200 Snf7 and 15–50 Vps24 molecules. Productive budding events required at least two additional Vps4 hexamers. Membrane budding was associated with continuous, stochastic exchange of Vps4 and ESCRT-III components, rather than steady growth of fixed assemblies, and depended on Vps4 ATPase activity. An all-or-none step led to final release of ESCRT-III and Vps4. Tomographic electron microscopy demonstrated that acute disruption of Vps4 recruitment stalled membrane budding. We propose a model in which multiple Vps4 hexamers (four or more) draw together several ESCRT-III filaments. This process induces cargo crowding and inward membrane buckling, followed by constriction of the nascent bud neck and ultimately ILV generation by vesicle fission. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2050-084X |
| Relation: | https://elifesciences.org/articles/31652; https://doaj.org/toc/2050-084X |
| DOI: | 10.7554/eLife.31652 |
| URL الوصول: | https://doaj.org/article/bfacb53d082646339785a5fcad761fe0 |
| رقم الأكسشن: | edsdoj.bfacb53d082646339785a5fcad761fe0 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2050084X |
|---|---|
| DOI: | 10.7554/eLife.31652 |