The function of RMP64 (ribonuclease MRP subunit p64, ENSG00000163608) is as follows. Specific component of the MRP ribonucleoprotein endoribonuclease, Rnase/Mrp complex, a ribonucleoprotein complex involved in pre-rRNA processing (PubMed:28115465, PubMed:40413743). May play a role in cortex development as part of the Notch signaling pathway. Downstream of Notch may repress the expression of proneural genes and inhibit neuronal differentiation thereby maintaining neural progenitors. May also play a role in preimplentation embryo development (By similarity). {ECO:0000250|UniProtKB:Q8R2U2, ECO:0000269|PubMed:28115465, ECO:0000269|PubMed:40413743}.