All families / PF08331
PF08331: QueG_DUF1730
Epoxyqueuosine reductase QueG, DUF1730
- Curation status
- SEEDED
- Seed status
- UNKNOWN CANDIDATE
- Characterization
- UNSCORED
Grounding
PF08331: Epoxyqueuosine reductase QueG, DUF1730
IPR013542: integrated entry for Epoxyqueuosine reductase QueG, DUF1730
Source description
This domain of unknown function occurs in Epoxyqueuosine reductase QueG, an iron-sulfur cluster-binding protein, together with the 4Fe-4S binding domain (PF00037 (Pfam entry)). QueG catalyses the conversion of epoxyqueuosine (oQ) to queuosine (Q), which is a hypermodified base found in the wobble positions of tRNA(Asp), tRNA(Asn), tRNA(His) and tRNA(Tyr) [InterPro reference PUB00058202].
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
2 verified sequence examples. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| P39288 | Epoxyqueuosine reductase Escherichia coli (strain K12) | 379 aa; version 1 UniProt 2026_03 | PTM REGISTRY MIRROR |
| P97030 | Epoxyqueuosine reductase Bacillus subtilis (strain 168) | 386 aa; version 2 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
- 10,770
- matches
- 10,771
- proteomes
- 10,737
- taxa
- 15,247
- structures
- 5
- alphafold models
- 6,905
- domain architectures
- 17
Classification basis
name matches duf; description says unknown function; domain of unknown function
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | epoxyqueuosine reductase activity | P39288 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | epoxyqueuosine reductase activity | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | tRNA queuosine(34) biosynthetic process | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | tRNA epoxyqueuosine(34) reductase QueG | P39288 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | tRNA epoxyqueuosine(34) reductase QueG | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, Cbl-binding domain | P39288 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, Cbl-binding domain | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, Cbl-binding domain | trait identifier | |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | 4Fe-4S double cluster binding domain | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, DUF1730 | P39288 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, DUF1730 | P97030 Epoxyqueuosine reductase | canonical example family classification |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | Epoxyqueuosine reductase QueG, DUF1730 | trait identifier | |
| QueG_DUF1730 (PF08331) | ProteinTraitsMech | PBS lyase HEAT-like repeat | P97030 Epoxyqueuosine reductase | canonical example family classification |
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.