This family represents Ribonuclease MRP protein subunit RMP1 from yeast, a component of ribonuclease MRP (RNase MRP), which is involved in rRNA processing in mitochondria [1]. This protein is found only in RNase MRP and is involved in extensive interactions with RNA, contributing to the formation of the substrate binding pocket of MRP [2]. It is, likely, orthologue to human NEPRO.

1: Characterization and purification of Saccharomyces cerevisiae RNase MRP reveals a new unique protein component. Salinas K, Wierzbicki S, Zhou L, Schmitt ME; J Biol Chem. 2005;280:11352-11360. PMID:15637077

2: Cryo-EM structure of catalytic ribonucleoprotein complex RNase MRP. Perederina A, Li D, Lee H, Bator C, Berezin I, Hafenstein SL, Krasilnikov AS; Nat Commun. 2020;11:3474. PMID:32651392

3: Structural insight into precursor ribosomal RNA processing by ribonuclease MRP. Lan P, Zhou B, Tan M, Li S, Cao M, Wu J, Lei M; Science. 2020;369:656-663. PMID:32586950