MARF1 (also known as Limkain-b1) is an essential protein for controlling meiosis and retrotransposon surveillance in mouse oocytes, first described as a human autoantigen localised to a subset of ABCD3 and PXF marked peroxisomes [1]. It may function both as an adaptor to recruit specific RNA targets and an effector to catalyse the specific cleavages of target RNAs [2]. MARF1 contains an N-terminal NYN domain, two central RRMs, and C-terminal OST-HTH/LOTUS domains [3,4]. This domain represents the RNA recognition motif 1 (RRM1) of MARF1.

1: Limkain b1, a novel human autoantigen localized to a subset of ABCD3 and PXF marked peroxisomes. Dunster K, Lai FP, Sentry JW; Clin Exp Immunol. 2005;140:556-563. PMID:15932519

2: MARF1 regulates essential oogenic processes in mice. Su YQ, Sugiura K, Sun F, Pendola JK, Cox GA, Handel MA, Schimenti JC, Eppig JJ; Science. 2012;335:1496-1499. PMID:22442484

3: Meiosis arrest female 1 (MARF1) has nuage-like function in mammalian oocytes. Su YQ, Sun F, Handel MA, Schimenti JC, Eppig JJ; Proc Natl Acad Sci U S A. 2012;109:18653-18660. PMID:23090997

4: Ribonuclease activity of MARF1 controls oocyte RNA homeostasis and genome integrity in mice. Yao Q, Cao G, Li M, Wu B, Zhang X, Zhang T, Guo J, Yin H, Shi L, Chen J, Yu X, Zheng L, Ma J, Su YQ; Proc Natl Acad Sci U S A. 2018;115:11250-11255. PMID:30333187