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Zanolari B, et al.  (2011) Transport to the plasma membrane is regulated differently early and late in the cell cycle in Saccharomyces cerevisiae. J Cell Sci 124(Pt 7):1055-66

Abstract: Traffic from the trans-Golgi network to the plasma membrane is thought to occur through at least two different independent pathways. The chitin synthase Chs3p requires the exomer complex and Arf1p to reach the bud neck of yeast cells in a cell-cycle-dependent manner, whereas the hexose transporter Hxt2p localizes over the entire plasma membrane independently of the exomer complex. Here, we conducted a visual screen for communalities and differences between the exomer-dependent and exomer-independent transport to the plasma membrane in Saccharomyces cerevisiae. We found that most of the components that are required for the fusion of transport vesicles with the plasma membrane, are involved in localization of both Chs3p and Hxt2p. However, the lethal giant larva homologue Sro7p is required primarily for the targeting of Chs3p, and not Hxt2p or other cargoes such as Itr1p, Cwp2p and Pma1p. Interestingly, this transport defect was more pronounced in large-budded cells just before cytokinesis than in small-budded cells. In addition, we found that the yeast Rab11 homologue Ypt31p determines the residence time of Chs3p in the bud neck of small-budded, but not large-budded, cells. We propose that transport to and from the bud neck is regulated differently in small- and large-budded cells, and differs early and late in the cell cycle.

Status: Published Type: Journal Article PubMed ID: 21363887

Topics addressed in this paper

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Topics Genes linked to topics (#1 - 10 )
CHS3 CHS5 CWP2 EXO84 HXT2 ITR1 PMA1 PRC1 SEC10 SEC3
Cellular Location blue ball blue ball blue ball blue ball blue ball blue ball
Function/Process blue ball blue ball blue ball blue ball
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Topics Genes linked to topics (#11 - 20 )
SEC4 SEC5 SEC6 SEC8 SRO7 SRO77 YPT1 YPT31 YPT32 YPT7
Cellular Location blue ball
Function/Process blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Genetic Interactions blue ball blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
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