All families / PF09902
PF09902: DUF2129
Uncharacterized protein conserved in bacteria (DUF2129)
- Curation status
- SEEDED
- Seed status
- KNOWN HISTORICAL DUF
- Characterization
- UNSCORED
Grounding
PF09902: Uncharacterized protein conserved in bacteria (DUF2129)
IPR016979: integrated entry for Uncharacterized protein conserved in bacteria (DUF2129)
Source description
This domain, found in various hypothetical prokaryotic proteins, has no known function. Structural modelling suggests this domain may bind nucleic acids [InterPro reference PUB00070793]. According to structure predictions, members of this entry are distantly related to SNaCT domains (CLan:CL0806).
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
3 verified sequence examples. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| A5IS08 | UPF0298 protein SaurJH9_1181 Staphylococcus aureus (strain JH9) | 84 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| A6U0T9 | UPF0298 protein SaurJH1_1203 Staphylococcus aureus (strain JH1) | 84 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| O34658 | UPF0298 protein YlbG Bacillus subtilis (strain 168) | 90 aa; version 1 UniProt 2026_03 | PTM REGISTRY MIRROR |
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
- 2,036
- matches
- 2,036
- proteomes
- 1,985
- taxa
- 2,666
- structures
- 0
- alphafold models
- 1,325
- domain architectures
- 1
Classification basis
short name matches duf
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| DUF2129 (PF09902) | ProteinTraitsMech | hypothetical protein | O34658 UPF0298 protein YlbG | canonical example family classification |
| DUF2129 (PF09902) | ProteinTraitsMech | Uncharacterized protein conserved in bacteria (DUF2129) | A5IS08 UPF0298 protein SaurJH9_1181 | canonical example family classification |
| DUF2129 (PF09902) | ProteinTraitsMech | Uncharacterized protein conserved in bacteria (DUF2129) | A6U0T9 UPF0298 protein SaurJH1_1203 | canonical example family classification |
| DUF2129 (PF09902) | ProteinTraitsMech | Uncharacterized protein conserved in bacteria (DUF2129) | O34658 UPF0298 protein YlbG | canonical example family classification |
| DUF2129 (PF09902) | ProteinTraitsMech | Uncharacterized protein conserved in bacteria (DUF2129) | trait identifier |
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.