This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Studying cytokinesis in the fission yeast, Schizosaccharomyces pombe, we previously identified Pik1p, a phosphatidylinositol 4-kinase, as a Cdc4p-binding protein. Cdc4p is a contractile ring component that is required for cytokinesis and for cell viability. We hypothesize that Cdc4p Pik1p interactions are involved in the mechanism and regulation of cytokinesis and in other aspects of cell cycle control. We have evidence that Pik1p may have a number of other binding partners with regulatory roles in S. pombe. The purpose of this proposed study is to identify Pik1p partner proteins and thereby the biological functions of this protein.
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