DUFMech

All families / PF02656

PF02656: DUF202

Domain of unknown function (DUF202)

Curation status
SEEDED
Seed status
UNKNOWN CANDIDATE
Characterization
UNSCORED

Grounding

PF02656: Domain of unknown function (DUF202)
IPR003807: integrated entry for Domain of unknown function (DUF202)

Source description

This family consists of hypothetical proteins some of which are putative membrane proteins. No functional information or experimental verification of function is known. This domain is around 100 amino acids long.

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
P0ADL6Inner membrane protein YidG
Escherichia coli (strain K12)
120 aa; version 1
UniProt 2026_03
UNIPROT FETCH
1 sibling references
P0ADM0Inner membrane protein YidH
Escherichia coli (strain K12)
115 aa; version 1
UniProt 2026_03
UNIPROT FETCH
1 sibling references
P40046Vacuolar transporter chaperone complex subunit 1
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
129 aa; version 3
UniProt 2026_03
UNIPROT FETCH
10 sibling references
P43585Vacuolar transporter chaperone complex subunit 2
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
828 aa; version 1
UniProt 2026_03
UNIPROT FETCH
12 sibling references
P47075Vacuolar transporter chaperone complex subunit 4
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
721 aa; version 2
UniProt 2026_03
UNIPROT FETCH
13 sibling references
Q02725Vacuolar transporter chaperone 3 complex subunit 3
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
835 aa; version 1
UniProt 2026_03
UNIPROT FETCH
11 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
18,669
matches
18,687
proteomes
7,356
taxa
11,815
structures
3
alphafold models
13,291
domain architectures
173

Classification basis

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

No scoring reasons supplied.

Related Mech records

FamilyMechRecordProteinLink basis
DUF202 (PF02656)ProteinTraitsMechfungal-type vacuole membraneP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuolar transporter chaperone complexP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuolar transporter chaperone complexP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuolar transporter chaperone complexP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuolar transporter chaperone complexQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate kinase activityP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechengulfment of target by autophagosomeP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechengulfment of target by autophagosomeP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechengulfment of target by autophagosomeP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechengulfment of target by autophagosomeQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechmicroautophagyP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate biosynthetic processP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate biosynthetic processP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate biosynthetic processP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate biosynthetic processQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate metabolic processP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate metabolic processP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate metabolic processP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechpolyphosphate metabolic processQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuolar transportP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechvacuole fusion, non-autophagicP40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechPolyPPase_VTC4_likeP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechPolyPPase_VTC2-3_likeP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechPolyPPase_VTC2-3_likeQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechSPX_VTC2_likeP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechSPX_VTC2_likeP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechSPX_VTC2_likeQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202P0ADL6
Inner membrane protein YidG
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202P0ADM0
Inner membrane protein YidH
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202P40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202P43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202P47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202Q02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function DUF202
trait identifier
DUF202 (PF02656)ProteinTraitsMechVTC domainP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domainP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domainQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domainP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domainP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domainQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function (DUF202)P40046
Vacuolar transporter chaperone complex subunit 1
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function (DUF202)P43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function (DUF202)P47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechDomain of unknown function (DUF202)
trait identifier
DUF202 (PF02656)ProteinTraitsMechVTC domain superfamilyP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domain superfamilyP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC domain superfamilyQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC, catalytic tunnel domainP43585
Vacuolar transporter chaperone complex subunit 2
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC, catalytic tunnel domainP47075
Vacuolar transporter chaperone complex subunit 4
canonical example family classification
DUF202 (PF02656)ProteinTraitsMechVTC, catalytic tunnel domainQ02725
Vacuolar transporter chaperone 3 complex subunit 3
canonical example family classification

Curation history and reviews

No retained curation events supplied.

No retained review supplied.

Record source

data/families/PF02656.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.