All families / PF12404
PF12404: DUF3663
Peptidase
- Curation status
- SEEDED
- Seed status
- KNOWN HISTORICAL DUF
- Characterization
- UNSCORED
Grounding
Source description
This domain family is found in bacteria, and is approximately 80 amino acids in length. The family is found in association with PF00883 (Pfam entry). There is a conserved WAF sequence motif.
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 |
|---|---|---|---|
| A4WDA4 | Peptidase B Enterobacter sp. (strain 638) | 428 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| P37095 | Peptidase B Escherichia coli (strain K12) | 427 aa; version 2 UniProt 2026_03 | PTM REGISTRY MIRROR |
| Q9RF52 | Peptidase B Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720) | 427 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
- 1,373
- matches
- 1,373
- proteomes
- 1,262
- taxa
- 1,750
- structures
- 3
- alphafold models
- 843
- domain architectures
- 3
Classification basis
short name matches duf
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| DUF3663 (PF12404) | ProteinTraitsMech | aminopeptidase PepB | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase_M17 | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase M17, leucyl aminopeptidase, C-terminal | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase M17, peptidase B-like, N-terminal domain | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase M17, peptidase B-like, N-terminal domain | trait identifier | |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase | A4WDA4 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase | Q9RF52 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Peptidase | trait identifier | |
| DUF3663 (PF12404) | ProteinTraitsMech | Cytosol aminopeptidase family, catalytic domain | P37095 Peptidase B | canonical example family classification |
| DUF3663 (PF12404) | ProteinTraitsMech | Cytosol aminopeptidase signature | P37095 Peptidase B | 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.