All families / PF01900
PF01900: RNase_P_Rpp14
Rpp14/Pop5 family
- Curation status
- SEEDED
- Seed status
- EX DUF
- Characterization
- UNSCORED
Grounding
PF01900: Rpp14/Pop5 family
IPR002759: integrated entry for Rpp14/Pop5 family
Source description
tRNA processing enzyme ribonuclease P (RNase P) is a ubiquitous ribozyme that catalyzes a Mg2-dependent hydrolysis to remove the 5'-leader sequence of precursor tRNA (pre-tRNA). Archaeal and eukaryotic 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 [InterPro reference PUB00007201]. Human RNase P is composed of a singular protein Pop1 and three subcomplexes, the Rpp20-Rpp25 heterodimer, Pop5-Rpp14- (Rpp30)2-Rpp40 heteropentamer, and Rpp21-Rpp29-Rpp38 heterotrimer. This family includes Rnp2 (also known as Pop5) from archaea [InterPro reference PUB00097410] and Pop5/Rpp14 from eukaryotes [InterPro reference PUB00100655,InterPro reference PUB00097413].
Evidence and references
- InterPro entry and its literature references. PUB identifiers are internal InterPro references, not PubMed identifiers. Unresolved citations link to the originating entry.
- Frozen description source: InterPro/Pfam API
Source descriptions and links are provenance, not independent functional validation.
Evidence counts: not scored.
Curated functional assertions
No curated functional assertions supplied.
Protein sequence examples
7 verified sequence examples. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| O95059 | Ribonuclease P protein subunit p14 Homo sapiens | 124 aa; version 3 UniProt 2026_03 | PTM REGISTRY MIRROR |
| P28005 | Ribonuclease P/MRP protein subunit POP5 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) | 173 aa; version 1 UniProt 2026_03 | UNIPROT FETCH11 sibling references
|
| Q57917 | Ribonuclease P protein component 2 Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) | 134 aa; version 1 UniProt 2026_03 | PTM REGISTRY MIRROR |
| Q6AWV1 | Probable ribonuclease P/MRP protein subunit POP5 Arabidopsis thaliana | 151 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
| Q969H6 | Ribonuclease P/MRP protein subunit POP5 Homo sapiens | 163 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
| Q9CQH8 | Ribonuclease P protein subunit p14 Mus musculus | 122 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
| Q9DB28 | Ribonuclease P/MRP protein subunit POP5 Mus musculus | 169 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
Pfam membership is not functional evidence. Whole-protein sequences do not establish domain boundaries. A coverage gap here is not absence from UniProt.
Sequences and metadata: UniProt Consortium, CC BY 4.0.
Domain matches
No residue-level domain match evidence is available in this build. Structure and AlphaFold counters do not supply coordinates or establish function.
Snapshot counters
- proteins
- 5,287
- matches
- 5,297
- proteomes
- 3,673
- taxa
- 9,445
- structures
- 15
- alphafold models
- 4,599
- domain architectures
- 79
Classification basis
pfam previous unknown name
No scoring reasons supplied.
Related Mech records
This family joined the worklist after the frozen cross-Mech scan, so other Mechs were not searched for it. Missing links here are not evidence that other Mechs lack it; rows shown come from mentions of a former DUF/UPF name.
No cross-Mech examples are present in the supplied snapshot.
Curation history and reviews
No retained curation events supplied.
No retained review supplied.
Record source
Status and evidence
- Seed status
- A name-based classification of frozen InterPro/Pfam metadata. UNKNOWN CANDIDATE means the metadata explicitly says the function is unknown. KNOWN HISTORICAL DUF means a DUF name matched without that wording; this heuristic is not proof of a known function and does not establish experimental characterization. EX DUF means Pfam renamed the family away from a DUF/UPF name, as recorded in Pfam's previous identifiers; a rename usually follows published work on some members but is naming history, not proof of function for every member. Some EX DUF families' current names or descriptions still say the function is unknown; their classification basis lists this, and scoring does not treat them as characterized. FALSE POSITIVE TEXT HIT means the naming rules did not match.
- Characterization
- A separate evidence-scoring result. UNSCORED means no score has been calculated; it is not evidence that the family lacks a known function. Missing scores are not negative evidence. PARTIALLY CHARACTERIZED has partial support; KNOWN HISTORICAL DUF can inherit the seed label or reflect a known-function signal. Neither label implies experimental validation.
- Evidence counts
- Source-specific signals, not unique proteins, publications, or confidence scores. Known counts Rhea reactions and experimentally supported GO molecular-function annotations. Partial counts functional/domain assignments. Context counts structural, environmental, orthology, interaction and neighborhood signals; context alone does not assign function. Repeated annotations may not be independent.
- Curation status
- Reported separately from seed classification and characterization. SNAPSHOT ONLY means no curated metadata was supplied for this build. SEEDED denotes a source-derived record, not an expert-reviewed functional claim.
- Missing counts
- Not available means the source did not supply that counter. A zero is a reported count. Not scored means evidence counts are unavailable.