Skip to main content

MCM3

Function

Acts as component of the MCM2-7 complex (MCM complex) which is the putative replicative helicase essential for 'once per cell cycle' DNA replication initiation and elongation in eukaryotic cells. The active ATPase sites in the MCM2-7 ring are formed through the interaction surfaces of two neighboring subunits such that a critical structure of a conserved arginine finger motif is provided in trans relative to the ATP-binding site of the Walker A box of the adjacent subunit. The six ATPase active sites, however, are likely to contribute differentially to the complex helicase activity. Required for DNA replication and cell proliferation.

Post-translational modifications

Acetylated by MCM3AP.

O-glycosylated (O-GlcNAcylated), in a cell cycle-dependent manner.

Sequence similarities

Belongs to the MCM family.

Cellular localization

  • Nucleus
  • Chromosome
  • Associated with chromatin before the formation of nuclei and detaches from it as DNA replication progresses.

Alternative names

  • DNA replication licensing factor MCM3
  • DNA polymerase alpha holoenzyme-associated protein P1
  • P1-MCM3
  • RLF subunit beta
  • p102
  • MCM3

Target type

Proteins

Molecular weight

90981Da