The actomyosin ring recruits early secretory compartments to the division site in fission yeast.

Details

Serval ID
serval:BIB_66A3749F09AA
Type
Article: article from journal or magazin.
Collection
Publications
Title
The actomyosin ring recruits early secretory compartments to the division site in fission yeast.
Journal
Molecular biology of the cell
Author(s)
Vjestica A., Tang X.Z., Oliferenko S.
ISSN
1939-4586 (Electronic)
ISSN-L
1059-1524
Publication state
Published
Issued date
03/2008
Peer-reviewed
Oui
Volume
19
Number
3
Pages
1125-1138
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
The ultimate goal of cytokinesis is to establish a membrane barrier between daughter cells. The fission yeast Schizosaccharomyces pombe utilizes an actomyosin-based division ring that is thought to provide physical force for the plasma membrane invagination. Ring constriction occurs concomitantly with the assembly of a division septum that is eventually cleaved. Membrane trafficking events such as targeting of secretory vesicles to the division site require a functional actomyosin ring suggesting that it serves as a spatial landmark. However, the extent of polarization of the secretion apparatus to the division site is presently unknown. We performed a survey of dynamics of several fluorophore-tagged proteins that served as markers for various compartments of the secretory pathway. These included markers for the endoplasmic reticulum, the COPII sites, and the early and late Golgi. The secretion machinery exhibited a marked polarization to the division site. Specifically, we observed an enrichment of the transitional endoplasmic reticulum (tER) accompanied by Golgi cisternae biogenesis. These processes required actomyosin ring assembly and the function of the EFC-domain protein Cdc15p. Cdc15p overexpression was sufficient to induce tER polarization in interphase. Thus, fission yeast polarizes its entire secretory machinery to the cell division site by utilizing molecular cues provided by the actomyosin ring.
Keywords
Actins/metabolism, Actomyosin/metabolism, COP-Coated Vesicles/metabolism, Cell Cycle Proteins/chemistry, Cell Cycle Proteins/metabolism, Cell Division, Cytokinesis, Cytoskeleton/metabolism, Endoplasmic Reticulum/metabolism, GTP-Binding Proteins/chemistry, GTP-Binding Proteins/metabolism, Protein Structure, Tertiary, Schizosaccharomyces/cytology, Schizosaccharomyces/metabolism, Secretory Vesicles/metabolism
Pubmed
Web of science
Create date
13/01/2021 16:05
Last modification date
20/01/2021 6:26
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