ribonuclease P complex

GO:0030677 · Ribonucleoprotein · Ribonucleoprotein complex · Proposed

A ribonucleoprotein complex that catalyzes cleavage of the leader sequence of precursor tRNAs (pre-tRNAs), generating the mature 5' end of tRNAs. [GO:0030677]

Synonyms: RNase P complex

UniProt location names: UniProt Consortium, CC BY 4.0. Reference label and route sources.

Functions

ribonuclease P activity GO:0004526 — The ribonuclease P complex removes 5-prime extra nucleotides from precursor tRNA by endonucleolytic RNA cleavage.
- GO:0004526 GO:0004526 is the Gene Ontology molecular-function term for ribonuclease P activity.
- GO:0030677 GO:0030677 defines RNase P complexes as catalyzing leader-sequence cleavage of precursor tRNAs.
tRNA 5'-leader removal GO:0001682 — RNase P complexes generate mature tRNA 5-prime ends by cleaving 5-prime leader sequences from pre-tRNAs.
- GO:0001682 GO:0001682 is the Gene Ontology biological-process term for tRNA 5'-leader removal.
- GO:0030677 GO:0030677 defines RNase P complexes by their cleavage of precursor tRNAs to generate mature 5-prime tRNA ends.

Mechanism graphs

RNase P processes precursor tRNAs (FUNCTION)

GO defines the ribonuclease P complex as a ribonucleoprotein complex that cleaves precursor-tRNA leader sequences to generate mature tRNA 5-prime ends.

Subject	Predicate	Object	Evidence
ribonuclease P complex	enables	ribonuclease P activity	`GO:0030677` GO:0030677 defines the complex by cleavage of precursor-tRNA leader sequences. `GO:0004526` GO:0004526 is the molecular-function term for ribonuclease P activity.
precursor tRNA	has 5-prime leader removed by	ribonuclease P activity	`GO:0004526` GO:0004526 defines ribonuclease P activity as endonucleolytic removal of 5-prime extra nucleotides from tRNA precursor.
ribonuclease P complex	supports	tRNA 5'-leader removal	`GO:0030677` GO:0030677 defines RNase P complexes as generating mature 5-prime ends of tRNAs by precursor-tRNA cleavage. `GO:0001682` GO:0001682 is the biological-process term for tRNA 5'-leader removal.

Discussions

CURATION_TODO (OPEN): Resolve source-neutral component boundaries across RNase P complex lineages. GO:0030677 captures the shared RNase P ribonucleoprotein identity and pre-tRNA 5-prime leader cleavage function, while its term comment flags that chloroplast complexes called RNase P appear not to contain RNA. Exact RNA and protein components should be curated on source-specific dimeric, multimeric, nucleolar, cyanelle and mitochondrial children before assigning source-neutral constituents to this generic parent; chloroplast or other RNA-free RNase P-like complexes need separate protein-only modeling instead of inheriting a generic RNase P RNA component.

Evidence

GO:0030677 Gene Ontology cellular-component term for the ribonuclease P complex, its exact synonym and its caveat that chloroplast RNase P-like complexes appear not to contain RNA.
GO:1902555 Gene Ontology cellular-component parent term for endoribonuclease complexes.
GO:1990904 Gene Ontology cellular-component parent term for ribonucleoprotein complexes.
GO:0004526 Gene Ontology molecular-function term for ribonuclease P activity.
GO:0001682 Gene Ontology biological-process term for tRNA 5'-leader removal.
PMID:12045094 Publication cited in GO:0030677 definition xrefs.

Curation history

2026-09-25T16:50:03Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-25T16:50:39Z codex · EXPANDED_RECORD — Added GO exact synonymy, endoribonuclease and ribonucleoprotein parentage, GO-backed tRNA 5-prime leader cleavage functions, GO/PubMed evidence, a nonmechanistic function graph and a TODO for source-neutral RNase P component boundaries.
2026-09-25T17:03:44Z codex · ADDRESS_REVIEW — Resolved PR #1588 review issue #1589 by recording the GO:0030677 chloroplast RNase P caveat in the source-neutral component-boundary TODO.

Source: data/structures/ribonucleoprotein/ribonuclease_p_complex.yaml