All families / PF12967
PF12967: DUF3855
Domain of Unknown Function with PDB structure (DUF3855)
- Curation status
- SEEDED
- Seed status
- UNKNOWN CANDIDATE
- Characterization
- UNSCORED
Grounding
PF12967: Domain of Unknown Function with PDB structure (DUF3855)
IPR024482: integrated entry for Domain of Unknown Function with PDB structure (DUF3855)
Source description
Family based on orphan protein (TM0875) from Thermotoga maritima that has been structurally determined as PDB:1022. The TM0875 gene of Thermotoga maritima encodes a hypothetical protein NP_228683 [InterPro reference PUB00029305] of unknown function. Analysis of TM0875 genomic context reveals the presence of MMT1 (a predicted Co/Zn/Cd cation transporter) and an inactive homolog of metal-dependent proteases. 1O22 shows weak structural similarity with the phosphoribosylformylglycinamidine synthase 1t4a (Dali Z-scr=4.6), the yggU protein (PDB structure:1n91; with DALI Z-scr=3), and with the thioesterase superfamily member (PDB structure 2cy9 - found using FATCAT), even though they have very low sequence identity.
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
No sibling protein candidate in the scanned commits.
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
- 4
- matches
- 4
- proteomes
- 4
- taxa
- 16
- structures
- 1
- alphafold models
- 4
- domain architectures
- 1
Classification basis
short name matches duf; name says unknown function; domain of unknown function
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| DUF3855 (PF12967) | ProteinTraitsMech | Domain of unknown function DUF3855 | trait identifier | |
| DUF3855 (PF12967) | ProteinTraitsMech | Domain of Unknown Function with PDB structure (DUF3855) | 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.