The minichromosome maintenance (Mcm) complex is the replicative helicase in eukaryotic species, that plays essential roles in the initiation and elongation phases of DNA replication. During late M and early G(1), the Mcm complex is loaded onto chromatin to form prereplicative complex in a Cdt1-dependent manner. This entry represents the C-terminal domain of human Mcm6 which is the Cdt1 binding domain (CBD). The structure of CBD exhibits a typical winged helix fold that is generally involved in protein-nucleic acid interaction. The CBD failed to interact with DNA in experiments [1]. The CBD-Cdt1 interaction involves the helix-turn-helix motif of CBD [1].

1: Characterization and structure determination of the Cdt1 binding domain of human minichromosome maintenance (Mcm) 6. Wei Z, Liu C, Wu X, Xu N, Zhou B, Liang C, Zhu G; J Biol Chem. 2010;285:12469-12473. PMID:20202939