The function of RPP25 (ribonuclease P/MRP subunit p25, ENSG00000178718) is as follows. Component of ribonuclease P, a ribonucleoprotein complex that generates mature tRNA molecules by cleaving their 5'-ends (PubMed:12003489, PubMed:16723659, PubMed:30454648). Also a component of the MRP ribonuclease complex, which cleaves pre-rRNA sequences (PubMed:28115465). {ECO:0000269|PubMed:12003489, ECO:0000269|PubMed:16723659, ECO:0000269|PubMed:28115465, ECO:0000269|PubMed:30454648}.