PF06682: SARAF

SOCE-associated regulatory factor of calcium homoeostasis

Curation status: SEEDED
Seed status: EX DUF
Characterization: UNSCORED

Grounding

PF06682: SOCE-associated regulatory factor of calcium homoeostasis
IPR009567: integrated entry for SOCE-associated regulatory factor of calcium homoeostasis

Source description

SARAF is as family of eukaryotic proteins embedded in the ER. SARAF is SOCE-associated regulatory factor, where SOCE is store operated calcium entry. ie a mechanism governing calcium homoeostasis in the cell and the mitochondria. SOCE involves the enabling of Ca2+ release-activated Ca2+ (CRAC) channels. SARAF is a single pass ER membrane protein whose systolic-facing domain is responsible for activity and whose luminary-facing domain carries out a regulatory function in conjunction with another membrane protein STIM, an ER single pass membrane protein that detects changes in ER Ca2+ levels through its EF-hand, conserved Ca2+ binding domain. STIM is the major target for SARAF regulation, and thus SARAF negatively regulates the SOCE entry of calcium into cells protecting them from overfilling [InterPro reference PUB00075537].

Evidence and references

InterPro entry and its literature references. PUB identifiers are internal InterPro references, not PubMed identifiers. Unresolved citations link to the originating entry.
Frozen description source: InterPro/Pfam API

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

2 verified sequence examples. FASTA

UniProt	Protein / organism	Sequence	Provenance
Q8R3Q0	Store-operated calcium entry-associated regulatory factor Mus musculus	334 aa; version 2 UniProt 2026_03	UNIPROT FETCH 1 sibling references ProteinTraitsMech: Pfam:PF06682
Q96BY9	Store-operated calcium entry-associated regulatory factor Homo sapiens	339 aa; version 1 UniProt 2026_03	UNIPROT FETCH 1 sibling references ProteinTraitsMech: Pfam:PF06682

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: 2,681
matches: 2,789
proteomes: 2,228
taxa: 5,903
structures: 3
alphafold models: 2,297
domain architectures: 44

Classification basis

pfam previous unknown name

No scoring reasons supplied.

Related Mech records

This family joined the worklist after the frozen cross-Mech scan, so other Mechs were not searched for it. Missing links here are not evidence that other Mechs lack it; rows shown come from mentions of a former DUF/UPF name.

No cross-Mech examples are present in the supplied snapshot.

Curation history and reviews

No retained curation events supplied.

No retained review supplied.

Record source

data/families/PF06682.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.