Mating yeast cells use an intrinsic polarity site to assemble a pheromone-gradient tracking machine
Mating yeast cells use an intrinsic polarity site to assemble a pheromone-gradient tracking machine
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交配酵母细胞使用固有极性位点来组装信息素梯度跟踪机
DOI:
10.1083/jcb.201901155
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发表时间:
2019
影响因子:
7.8
通讯作者:
Stone, David E.
中科院分区:
文献类型:
--
作者:
Wang, Xin;Tian, Wei;Banh, Bryan T.;Statler, Bethanie-Michelle;Liang, Jie;Stone, David E.
The mating of budding yeast depends on chemotropism, a fundamental cellular process. The two yeast mating types secrete peptide pheromones that bind to GPCRs on cells of the opposite type. Cells find and contact a partner by determining the direction of the pheromone source and polarizing their growth toward it. Actin-directed secretion to the chemotropic growth site (CS) generates a mating projection. When pheromone-stimulated cells are unable to sense a gradient, they form mating projections where they would have budded in the next cell cycle, at a position called the default polarity site (DS). Numerous models have been proposed to explain yeast gradient sensing, but none address how cells reliably switch from the intrinsically determined DS to the gradient-aligned CS, despite a weak spatial signal. Here we demonstrate that, in mating cells, the initially uniform receptor and G protein first polarize to the DS, then redistribute along the plasma membrane until they reach the CS. Our data indicate that signaling, polarity, and trafficking proteins localize to the DS during assembly of what we call the gradient tracking machine (GTM). Differential activation of the receptor triggers feedback mechanisms that bias exocytosis upgradient and endocytosis downgradient, thus enabling redistribution of the GTM toward the pheromone source. The GTM stabilizes when the receptor peak centers at the CS and the endocytic machinery surrounds it. A computational model simulates GTM tracking and stabilization and correctly predicts that its assembly at a single site contributes to mating fidelity.
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影响因子:
56.9
作者:
Butty, AC;Pryciak, PM;Peter, M
通讯作者:
Peter, M
影响因子:
2.9
作者:
A. Tolkovsky;A. Levitzki
通讯作者:
A. Levitzki
DOI:
10.1073/pnas.82.12.4055
发表时间:
1985-06
影响因子:
11.1
作者:
Steven I. Reed;J. Hadwiger;Attila T. Lorincz
通讯作者:
Steven I. Reed;J. Hadwiger;Attila T. Lorincz
影响因子:
9.2
作者:
Overton, MC;Blumer, KJ
通讯作者:
Blumer, KJ
DOI:
10.1083/jcb.201206081
发表时间:
2013-02-18
期刊:
The Journal of cell biology
影响因子:
--
作者:
Jose M;Tollis S;Nair D;Sibarita JB;McCusker D
通讯作者:
McCusker D