The MCM2-7 complex consists of six closely related proteins that are highly conserved throughout the eukaryotic kingdom. In eukaryotes, Mcm3 is a component of the MCM2-7 complex (MCM complex), which consists of six sequence-related AAA + type ATPases/helicases that form a hetero-hexameric ring []. MCM2-7 complex is part of the pre-replication complex (pre-RC). In G1 phase, inactive MCM2-7 complex is loaded onto origins of DNA replication [, , ]. During G1-S phase, MCM2-7 complex is activated to unwind the double stranded DNA and plays an important role in DNA replication forks elongation [].The components of the MCM2-7 complex are: .DNA replication licensing factor MCM2, DNA replication licensing factor MCM3, DNA replication licensing factor MCM4, DNA replication licensing factor MCM5, DNA replication licensing factor MCM6, DNA replication licensing factor MCM7,
This entry represents the RNA recognition motif (RRM) of MCM3-associated protein (MCM3AP, also known as GANP), a nuclear protein with multiple domains, which have different functions. GANP serves as the scaffold of the mammalian TREX-2 complex that links transcription with nuclear messenger RNA export []. GANP can act as an RNA export factor that interacts with activation-induced cytidine deaminase (AID) and shepherds it from the cytoplasm to the nucleus, and toward the IgV region loci in B cells []. GANP contains the Sac3-homology domain, a putative RNA recognition motif, the Nup-homology domain, and the C-terminal histone-acetyltransferase (HAT) domain. Its HAT domain has been shown to regulate minichromosome maintenance protein 3 (MCM3) []. An alternatively spliced variant of GANP mRNA has been reported in humans. A shorter isoform of GANP (likely to encode an 80kDa protein) is associated with MCM3 of the DNA helicase MCM-complex (composed of MCM2-MCM7) and possesses HAT activity [].
