This is the LOTUS domain which is repeated in the C-terminal of of Meiosis regulator and mRNA stability factor 1 (MARF1) protein, an essential regulator of oogenesis required for completion of meiosis and retrotransposon silencing, key to maintain germline integrity. This domain provides RNA-binding properties to this protein, acting as an adapter to recruit targets for the effector domain NYN (Pfam:PF01936) at the N-terminal (RNase activity) [1].

1: 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