DUFMech

All families / PF04356

PF04356: DUF489

Protein of unknown function (DUF489)

Curation status
SEEDED
Seed status
UNKNOWN CANDIDATE
Characterization
UNSCORED

Grounding

PF04356: Protein of unknown function (DUF489)
IPR007451: integrated entry for Protein of unknown function (DUF489)

Source description

Protein of unknown function, cotranscribed with purB in Escherichia coli, but with function unrelated to purine biosynthesis [InterPro reference PUB00009959].

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

UniProtProtein / organismSequenceProvenance
A0KI52High frequency lysogenization protein HflD homolog
Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / DSM 30187 / BCRC 13018 / CCUG 14551 / JCM 1027 / KCTC 2358 / NCIMB 9240 / NCTC 8049)
204 aa; version 1
UniProt 2026_03
UNIPROT FETCH
1 sibling references
A0KW10High frequency lysogenization protein HflD homolog
Shewanella sp. (strain ANA-3)
205 aa; version 1
UniProt 2026_03
UNIPROT FETCH
1 sibling references
P25746High frequency lysogenization protein HflD
Escherichia coli (strain K12)
213 aa; version 1
UniProt 2026_03
PTM REGISTRY MIRROR
8 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
2,941
matches
2,947
proteomes
2,855
taxa
3,952
structures
2
alphafold models
1,879
domain architectures
3

Classification basis

short name matches duf; name says unknown function; description says unknown function

No scoring reasons supplied.

Related Mech records

FamilyMechRecordProteinLink basis
DUF489 (PF04356)ProteinTraitsMechhigh frequency lysogenization protein HflDP25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechhigh frequency lysogenization protein HflDP25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechhigh frequency lysogenization protein HflDP25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechhigh frequency lysogenization protein HflDP25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechProtein of unknown function (DUF489)A0KI52
High frequency lysogenization protein HflD homolog
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechProtein of unknown function (DUF489)A0KW10
High frequency lysogenization protein HflD homolog
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechProtein of unknown function (DUF489)P25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechProtein of unknown function (DUF489)
trait identifier
DUF489 (PF04356)ProteinTraitsMechHflD-like superfamilyP25746
High frequency lysogenization protein HflD
canonical example family classification
DUF489 (PF04356)ProteinTraitsMechHflD-likeP25746
High frequency lysogenization protein HflD
canonical example family classification

Curation history and reviews

No retained curation events supplied.

No retained review supplied.

Record source

data/families/PF04356.yaml
Family YAML in this build

Download this family (JSON)

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.