DNA repair protein REV1 is a protein that in humans is encoded by the REV1gene.[5][6]
This gene encodes a protein with similarity to the S. cerevisiaemutagenesis protein Rev1. The Rev1 proteins contain a BRCT domain, which is important in protein-protein interactions. A suggested role for the human Rev1-like protein is as a scaffold that recruits DNA polymerases involved in translesion synthesis (TLS) of damaged DNA. Two alternatively spliced transcript variants that encode different proteins have been found.[6]
Rev1 is a Y family DNA polymerase; it is sometimes referred to as a deoxycytidyl transferase because it only inserts deoxycytidine (dC) across from lesions. Whether G, A, T, C, or an abasic site, Rev1 will always add a C. Rev1 has the ability to always add a C, because it uses an arginine as a template which complements well with C.[7] Yet it is believed[by whom?] that Rev1 rarely uses its polymerase activity; rather it is thought that Rev1's primary role is as a protein landing pad, whereby it helps direct the recruitment of TLS proteins, especially Pol ζ (Rev3/Rev7).
Interactions
REV1 has been shown to interact with MAD2L2.[8] It is believed that Rev1 may interact with PCNA, once ubiquitylated due to a lesion, and help recruit Pol ζ (Rev3/Rev7) a B family polymerase involved in TLS.
Wixler V, Laplantine E, Geerts D, et al. (1999). "Identification of novel interaction partners for the conserved membrane proximal region of alpha-integrin cytoplasmic domains". FEBS Lett. 445 (2–3): 351–5. doi:10.1016/S0014-5793(99)00151-9. PMID10094488. S2CID9218762.
Tissier A, Kannouche P, Reck MP, et al. (2005). "Co-localization in replication foci and interaction of human Y-family members, DNA polymerase pol eta and REVl protein". DNA Repair (Amst.). 3 (11): 1503–14. doi:10.1016/j.dnarep.2004.06.015. PMID15380106.
Yuasa MS, Masutani C, Hirano A, et al. (2006). "A human DNA polymerase eta complex containing Rad18, Rad6 and Rev1; proteomic analysis and targeting of the complex to the chromatin-bound fraction of cells undergoing replication fork arrest". Genes Cells. 11 (7): 731–44. doi:10.1111/j.1365-2443.2006.00974.x. PMID16824193. S2CID32695133.
