DUFMech

All families / PF13778

PF13778: DUF4174

Domain of unknown function (DUF4174)

Curation status
SEEDED
Seed status
UNKNOWN CANDIDATE
Characterization
UNSCORED

Grounding

PF13778: Domain of unknown function (DUF4174)
IPR025232: integrated entry for Domain of unknown function (DUF4174)

Source description

This domain of unknown function is found in a putative tumour suppressor gene [InterPro reference PUB00057318] and in a ligand for the the urokinase-type plasminogen activator receptor, which plays a role in cellular migration and adhesion [InterPro reference PUB00057319,InterPro reference PUB00057320].

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

6 verified sequence examples. FASTA

UniProtProtein / organismSequenceProvenance
O60687Sushi repeat-containing protein SRPX2
Homo sapiens
465 aa; version 1
UniProt 2026_03
PTM REGISTRY MIRROR
7 sibling references
P78539Sushi repeat-containing protein SRPX
Homo sapiens
464 aa; version 1
UniProt 2026_03
UNIPROT FETCH
6 sibling references
Q76M96Coiled-coil domain-containing protein 80
Homo sapiens
950 aa; version 1
UniProt 2026_03
UNIPROT FETCH
1 sibling references
Q8R054Sushi repeat-containing protein SRPX2
Mus musculus
468 aa; version 2
UniProt 2026_03
UNIPROT FETCH
5 sibling references
Q8R2G6Coiled-coil domain-containing protein 80
Mus musculus
949 aa; version 2
UniProt 2026_03
UNIPROT FETCH
1 sibling references
Q9R0M3Sushi-repeat-containing protein SRPX
Mus musculus
464 aa; version 1
UniProt 2026_03
UNIPROT FETCH
4 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
5,184
matches
7,353
proteomes
2,744
taxa
5,180
structures
0
alphafold models
4,088
domain architectures
38

Classification basis

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

No scoring reasons supplied.

Related Mech records

FamilyMechRecordProteinLink basis
DUF4174 (PF13778)ProteinTraitsMechhepatocyte growth factor bindingO60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechhepatocyte growth factor bindingQ8R054
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechnegative regulation of cell proliferation involved in contact inhibitionQ9R0M3
Sushi-repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechphagolysosome assemblyP78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174O60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174P78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174Q76M96
Coiled-coil domain-containing protein 80
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174Q8R054
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174Q8R2G6
Coiled-coil domain-containing protein 80
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174Q9R0M3
Sushi-repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function DUF4174
trait identifier
DUF4174 (PF13778)ProteinTraitsMechHYR domainO60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domainP78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domainQ8R054
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domainQ9R0M3
Sushi-repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domainO60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domainP78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function (DUF4174)O60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function (DUF4174)P78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function (DUF4174)Q8R054
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechDomain of unknown function (DUF4174)
trait identifier
DUF4174 (PF13778)ProteinTraitsMechHYR domain profileO60687
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domain profileP78539
Sushi repeat-containing protein SRPX
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domain profileQ8R054
Sushi repeat-containing protein SRPX2
canonical example family classification
DUF4174 (PF13778)ProteinTraitsMechHYR domain profileQ9R0M3
Sushi-repeat-containing protein SRPX
canonical example family classification

Curation history and reviews

No retained curation events supplied.

No retained review supplied.

Record source

data/families/PF13778.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.