This family is found in eukaryotes. Family members include MRN complex-interacting protein (MRNIP), which plays a role in preventing the accumulation of damaged DNA in cells. It associates with the MRE11-RAD50-NBS1 (MRN) damage-sensing complex and is rapidly recruited to sites of DNA damage. Phosphorylation of a serine promotes nuclear localization of MRNIP [1].

1: MRNIP/C5orf45 Interacts with the MRN Complex and Contributes to the DNA Damage Response. Staples CJ, Barone G, Myers KN, Ganesh A, Gibbs-Seymour I, Patil AA, Beveridge RD, Daye C, Beniston R, Maslen S, Ahel I, Skehel JM, Collis SJ; Cell Rep. 2016;16:2565-2575. PMID:27568553