Exocyst and autophagy-related membrane trafficking in plants

0486070 - ÚEB 2018 RIV GB eng J - Journal Article
Pečenková, Tamara - Marković, Vedrana - Sabol, P. - Kulich, I. - Žárský, Viktor
Exocyst and autophagy-related membrane trafficking in plants.
Journal of Experimental Botany. Roč. 69, č. 1 (2018), s. 47-57. ISSN 0022-0957. E-ISSN 1460-2431
R&D Projects: GA ČR(CZ) GA15-14886S
Institutional support: RVO:61389030
Keywords : Autophagy * endomembranes * exocyst * plant defence * secretory transport * ups
OECD category: Cell biology
Impact factor: 5.360, year: 2018

Endomembrane traffic in eukaryotic cells functions partially as a means of communication, delivery of membrane in one direction has to be balanced with a reduction at the other end. This effect is typically the case during the defence against pathogens. To combat pathogens, cellular growth and differentiation are suppressed, while endomembrane traffic is poised towards limiting the pathogen attack. The octameric exocyst vesicle-tethering complex was originally discovered as a factor facilitating vesicle-targeting and vesicle-plasma membrane (PM) fusion during exocytosis prior to and possibly during SNARE complex formation. Interestingly, it was recently implicated both in animals and plants in autophagy membrane traffic. In animal cells, the exocyst is integrated into the mTOR-regulated energy metabolism stress/starvation pathway, participating in the formation and especially initiation of an autophagosome. In plants, the first functional link was to autophagy-related anthocyanin import to the vacuole and to starvation. In this concise review, we summarize the current knowledge of exocyst functions in autophagy and defence in plants that might involve unconventional secretion and compare it with animal conditions. Formation of different exocyst complexes during undisturbed cell growth, as opposed to periods of cellular stress reactions involving autophagy, might contribute to the coordination of endomembrane trafficking pathways.
Permanent Link: http://hdl.handle.net/11104/0280957