Chemistry and Physics Faculty Articles
Title
Regulation of Cell Diameter, For3p Localization, and Cell Symmetry by Fission Yeast Rho-GAP Rga4p
Document Type
Article
Publication Date
6-2007
Publication Title
Molecular Biology of the Cell
ISSN
1059-1524
Volume
18
Issue/No.
6
First Page
2090
Last Page
2101
Abstract
Control of cellular dimensions and cell symmetry are critical for development and differentiation. Here we provide evidence that the putative Rho-GAP Rga4p of Schizosaccharomyces pombe controls cellular dimensions. rga4Δ cells are wider in diameter and shorter in length, whereas Rga4p overexpression leads to reduced diameter of the growing cell tip. Consistent with a negative role in cell growth control, Rga4p protein localizes to the cell sides in a “corset” pattern, and to the nongrowing cell tips. Additionally, rga4Δ cells show an altered growth pattern similar to that observed in mutants of the formin homology protein For3p. Consistent with these observations, Rga4p is required for normal localization of For3p and for normal distribution of the actin cytoskeleton. We show that different domains of the Rga4p protein mediate diverse morphological functions. The C-terminal GAP domain mediates For3p localization to the cell tips and maintains cell diameter. Conversely, overexpression of the N-terminal LIM homology domain of Rga4p promotes actin cable formation in a For3p-dependent manner. Our studies indicate that Rga4p functionally interacts with For3p and has a novel function in the control of cell diameter and cell growth.
NSUWorks Citation
Das, M., Wiley, D. J., Medina, S., Vincent, H. A., Larrea, M. D., Oriolo, A., & Verde, F. (2007). Regulation of Cell Diameter, For3p Localization, and Cell Symmetry by Fission Yeast Rho-GAP Rga4p. Molecular Biology of the Cell, 18, (6), 2090 - 2101. https://doi.org/10.1091/mbc.E06-09-0883. Retrieved from https://nsuworks.nova.edu/cnso_chemphys_facarticles/138
DOI
10.1091/mbc.E06-09-0883
Comments
©2007 by The American Society for Cell Biology