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- W2145948328 abstract "The multisubunit conserved oligomeric Golgi (COG) complex has been shown previously to be involved in Golgi function in yeast and mammalian tissue culture cells. Despite this broad conservation, several subunits, including Cog5, were not essential for growth and showed only mild effects on secretion when mutated in yeast, raising questions about what functions these COG complex subunits play in the life of the cell. Here, we show that function of the gene four way stop (fws), which encodes the Drosophila Cog5 homologue, is necessary for dramatic changes in cellular and subcellular morphology during spermatogenesis. Loss-of-function mutations in fws caused failure of cleavage furrow ingression in dividing spermatocytes and failure of cell elongation in differentiating spermatids and disrupted the formation and/or stability of the Golgi-based spermatid acroblast. Consistent with the lack of a growth defect in yeast lacking Cog5, animals lacking fws function were viable, although males were sterile. Fws protein localized to Golgi structures throughout spermatogenesis. We propose that Fws may directly or indirectly facilitate efficient vesicle traffic through the Golgi to support rapid and extensive increases in cell surface area during spermatocyte cytokinesis and polarized elongation of differentiating spermatids. Our study suggests that Drosophila spermatogenesis can be an effective sensitized genetic system to uncover in vivo functions for proteins involved in Golgi architecture and/or vesicle transport." @default.
- W2145948328 created "2016-06-24" @default.
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- W2145948328 date "2003-01-01" @default.
- W2145948328 modified "2023-10-14" @default.
- W2145948328 title "The<i>Drosophila Cog5</i>Homologue Is Required for Cytokinesis, Cell Elongation, and Assembly of Specialized Golgi Architecture during Spermatogenesis" @default.
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- W2145948328 doi "https://doi.org/10.1091/mbc.e02-06-0343" @default.
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