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coiled-coil domain found in the geminin family The geminin family includes geminin, geminin coiled-coil domain-containing protein 1 (GemC1), and McIdas. Together, geminin, GemC1, and McIdas (also called Idas or multicilin), controls both the cell cycle and differentiation decisions in cells. They were initially identified as cell cycle regulators associated with the chromosome cycle. Geminin is required to ensure once-per-cell-cycle genome replication, while McIdas and GemC1 bind to geminin and are implicated in DNA replication control. Geminin binds to Cdt1, a key component and crucial regulator of pre-replicative complexes (pre-RC), in a timely manner to inhibit DNA replication. Geminin family members also function as early regulators of multiciliogenesis. GemC1 and McIdas specify the multiciliate cell fate by forming complexes with the E2F4/5 transcription factors, resulting in centriole amplification and cilia formation. Geminin family proteins contain a homologous central coiled-coil domain that mediates homo- and heterodimerization; this ability is likely to be important for modulating their function in cycling and differentiating cells. This model represents the central coiled-coil domain of the geminin family. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",