All families / PF09900
PF09900: DUF2127
Predicted membrane protein (DUF2127)
- Curation status
- SEEDED
- Seed status
- KNOWN HISTORICAL DUF
- Characterization
- UNSCORED
Grounding
PF09900: Predicted membrane protein (DUF2127)
IPR021125: integrated entry for Predicted membrane protein (DUF2127)
Source description
This domain, found in various hypothetical prokaryotic and archaeal proteins, has no known function.
Evidence and references
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 |
|---|---|---|---|
| P64684 | Uncharacterized protein Mb0093 Mycobacterium bovis (strain ATCC BAA-935 / AF2122/97) | 256 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| P9WM70 | Uncharacterized protein MT0099 Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh) | 256 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| P9WM71 | Uncharacterized protein Rv0090 Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv) | 256 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
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
- 1,839
- matches
- 1,839
- proteomes
- 1,737
- taxa
- 2,601
- structures
- 0
- alphafold models
- 1,096
- domain architectures
- 4
Classification basis
short name matches duf
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| DUF2127 (PF09900) | ProteinTraitsMech | Domain of unknown function DUF2127 | trait identifier | |
| DUF2127 (PF09900) | ProteinTraitsMech | Predicted membrane protein (DUF2127) | P64684 Uncharacterized protein Mb0093 | canonical example family classification |
| DUF2127 (PF09900) | ProteinTraitsMech | Predicted membrane protein (DUF2127) | P9WM70 Uncharacterized protein MT0099 | canonical example family classification |
| DUF2127 (PF09900) | ProteinTraitsMech | Predicted membrane protein (DUF2127) | P9WM71 Uncharacterized protein Rv0090 | canonical example family classification |
| DUF2127 (PF09900) | ProteinTraitsMech | Predicted membrane protein (DUF2127) | 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.