developmental stage:Present during G1 and early S phase of the cell cycle. Degraded during the late S, G2, and M phases.,Function:Cooperates with CDC6 to promote the loading of the mini-chromosome maintenance complex onto chromatin to form the pre-replication complex necessary to initiate DNA replication. Binds DNA in a sequence-, strand-, and conformation-independent manner. Potential oncogene.,PTM:Phosphorylated by cyclin A-dependent kinases which results in the binding of CDT1 to the F-box protein SKP2 and subsequent degradation. Binding to GMNN is not affected by phosphorylation.,PTM:Ubiquitinated, leading to its subsequent degradation. The interaction with GMNN protects it against ubiquitination.,similarity:Belongs to the Cdt1 family.,subunit:Interaction with GMNN inhibits both binding of the MCM complex to origins of replication and DNA-binding activity.,
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