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DNA helicase MCM9

Definition:

Component of the MCM8-MCM9 complex, a complex involved in the repair of double-stranded DNA breaks (DBSs) and DNA interstrand cross-links (ICLs) by homologous recombination (HR). Required for DNA resection by the MRE11-RAD50-NBN/NBS1 (MRN) complex by recruiting the MRN complex to the repair site and by promoting the complex nuclease activity. Probably by regulating the localization of the MRN complex, indirectly regulates the recruitment of downstream effector RAD51 to DNA damage sites including DBSs and ICLs. Acts as a helicase in DNA mismatch repair (MMR) following DNA replication errors to unwind the mismatch containing DNA strand. In addition, recruits MLH1, a component of the MMR complex, to chromatin. The MCM8-MCM9 complex is dispensable for DNA replication and S phase progression. Probably by regulating HR, plays a key role during gametogenesis (By similarity).

References:

[1]. Sabine Traver, et al. MCM9 Is Required for Mammalian DNA Mismatch Repair. Mol Cell. 2015 Sep 3;59(5):831-9. [Content Brief]

[2]. Kyung Yong Lee, et al. MCM8-9 complex promotes resection of double-strand break ends by MRE11-RAD50-NBS1 complex. Nat Commun. 2015 Jul 28;6:7744. [Content Brief]

[3]. Jonghoon Park, et al. The MCM8-MCM9 complex promotes RAD51 recruitment at DNA damage sites to facilitate homologous recombination. Mol Cell Biol. 2013 Apr;33(8):1632-44. [Content Brief]

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