Membrane curvature directs the localization of Cdc42p to novel foci required for cell-cell fusion.

Abstract excerpt

Cell fusion is ubiquitous in eukaryotic fertilization and development. The highly conserved Rho-GTPase Cdc42p promotes yeast fusion through interaction with Fus2p, a pheromone-induced amphiphysin-like protein. We show that in prezygotes, Cdc42p forms a novel Fus2p-dependent focus at the center of the zone of cell fusion (ZCF) and remains associated with remnant cell walls after initial fusion. At the ZCF and...

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