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  • Title: Interdependent nuclear accumulation of budding yeast Cdt1 and Mcm2-7 during G1 phase.
    Author: Tanaka S, Diffley JF.
    Journal: Nat Cell Biol; 2002 Mar; 4(3):198-207. PubMed ID: 11836525.
    Abstract:
    Cdt1 is essential for loading Mcm2-7 proteins into prereplicative complexes (pre-RCs) during replication licensing and has been found in organisms as diverse as fission yeast and humans. We have identified a homologue of Cdt1 in Saccharomyces cerevisiae, which is required for pre-RC assembly. We show that, like Mcm2-7p, Cdt1p accumulates in the nucleus during G1 phase and is excluded from the nucleus later in the cell cycle by cyclin dependent kinases (cdks). Cdt1p interacts with the Mcm2--7p complex, and the nuclear accumulation of these proteins during G1 is interdependent. This coregulation of Cdt1p and Mcm2-7p represents a novel level of pre-RC control.
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