All families / PF08952
PF08952: DUF1866
Domain of unknown function (DUF1866)
- Curation status
- SEEDED
- Seed status
- UNKNOWN CANDIDATE
- Characterization
- UNSCORED
Grounding
PF08952: Domain of unknown function (DUF1866)
IPR015047: integrated entry for Domain of unknown function (DUF1866)
Source description
This domain, found in Synaptojanin, 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 |
|---|---|---|---|
| G5ECL2 | Synaptojanin Caenorhabditis elegans | 1119 aa; version 1 UniProt 2026_03 | UNIPROT FETCH16 sibling references
|
| O15056 | Polyphosphatidylinositol phosphatase SYNJ2 Homo sapiens | 1496 aa; version 3 UniProt 2026_03 | PTM REGISTRY MIRROR |
| O43426 | Polyphosphatidylinositol phosphatase SYNJ1 Homo sapiens | 1573 aa; version 2 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
- 3,724
- matches
- 3,740
- proteomes
- 1,173
- taxa
- 3,875
- structures
- 2
- alphafold models
- 993
- domain architectures
- 24
Classification basis
short name matches duf; name says unknown function; domain of unknown function
No scoring reasons supplied.
Related Mech records
| Family | Mech | Record | Protein | Link basis |
|---|---|---|---|---|
| DUF1866 (PF08952) | ProteinTraitsMech | inositol-1,4,5-trisphosphate 5-phosphatase activity | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | phosphatidylinositol-3,5-bisphosphate 5-phosphatase activity | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | phosphatidylinositol-4,5-bisphosphate 5-phosphatase activity | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | acetylcholine transport | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | gamma-aminobutyric acid transport | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Golgi vesicle uncoating | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | necroptotic process | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | phosphatidylinositol dephosphorylation | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | positive regulation of muscle contraction | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | regulation of backward locomotion | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | regulation of forward locomotion | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | synaptic vesicle budding from presynaptic endocytic zone membrane | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | synaptic vesicle uncoating | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | INPP5c_Synj | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Synaptojanin-1/2, RNA recognition motif | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Synaptojanin-1/2, RNA recognition motif | trait identifier | |
| DUF1866 (PF08952) | ProteinTraitsMech | Domain of unknown function (DUF1866) | G5ECL2 Synaptojanin | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Domain of unknown function (DUF1866) | O15056 Polyphosphatidylinositol phosphatase SYNJ2 | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Domain of unknown function (DUF1866) | O43426 Polyphosphatidylinositol phosphatase SYNJ1 | canonical example family classification |
| DUF1866 (PF08952) | ProteinTraitsMech | Domain of unknown function (DUF1866) | trait identifier | |
| DUF1866 (PF08952) | ProteinTraitsMech | Endonuclease/Exonuclease/phosphatase family 2 | O15056 Polyphosphatidylinositol phosphatase SYNJ2 | 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.