Protein Domain : Ribonuclease P/MRP subunit Rpp29 superfamily IPR036980

Type	Homologous_superfamily
Description	Ribonuclease P (Rnp) is a ubiquitous ribozyme that catalyzes a Mg2 -dependent hydrolysis to remove the 5'-leader sequence of precursor tRNA (pre-tRNA) in all three domains of life [ ]. In bacteria, the catalytic RNA (typically ~120kDa) is aided by a small protein cofactor (~14kDa) []. Archaeal and eukaryote RNase P consist of a single RNA and archaeal RNase P has four or five proteins, while eukaryotic RNase P consists of 9 or 10 proteins. Eukaryotic and archaeal RNase P RNAs cooperatively function with protein subunits in catalysis [].This entry includes p29 subunit (also known as Rpp29 or Pop4) of the Ribonuclease P complex [ ]. Its homologues from eukaryotes are also a subunit of the RNase MRP complex. The structure of the RNase P subunit, Rpp29, from Methanobacterium thermoautotrophicum has been determined. Mth Rpp29 is a member of the oligonucleotide/oligosaccharide binding fold family. It contains a structured β-barrel core and unstructured N- and C-terminal extensions bearing several highly conserved amino acid residues that could be involved in RNA contacts in the protein-RNA complex []. Rpp29 () catalyses the endonucleolytic cleavage of RNA, removing 5'-extranucleotides from tRNA precursor. It interacts with the Rpp25 and Pop5 subunits.
Short Name	RNase_P/MRP_Rpp29_sf