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. 1994 Jan;14(1):255–267. doi: 10.1128/mcb.14.1.255

CDC44: a putative nucleotide-binding protein required for cell cycle progression that has homology to subunits of replication factor C.

E A Howell 1, M A McAlear 1, D Rose 1, C Holm 1
PMCID: PMC358375  PMID: 8264593

Abstract

To investigate the means by which a cell regulates the progression of the mitotic cell cycle, we characterized cdc44, a mutation that causes Saccharomyces cerevisiae cells to arrest before mitosis. CDC44 encodes a 96-kDa basic protein with significant homology to a human protein that binds DNA (PO-GA) and to three subunits of human replication factor C (also called activator 1). The hypothesis that Cdc44p is involved in DNA metabolism is supported by the observations that (i) levels of mitotic recombination suggest elevated rates of DNA damage in cdc44 mutants and (ii) the cell cycle arrest observed in cdc44 mutants is alleviated by the DNA damage checkpoint mutations rad9, mec1, and mec2. The predicted amino acid sequence of Cdc44p contains GTPase consensus sites, and mutations in these regions cause a conditional cell cycle arrest. Taken together, these observations suggest that the essential CDC44 gene may encode the large subunit of yeast replication factor C.

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Selected References

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