All families / PF10344
PF10344: Hobbit
Hobbit/FMP27/BTLP2 family
- Curation status
- SEEDED
- Seed status
- EX DUF
- Characterization
- UNSCORED
Grounding
PF10344: Hobbit/FMP27/BTLP2 family
IPR045167: integrated entry for Hobbit/FMP27/BTLP2 family
Source description
This entry represents the Hobbit protein from Drosophila melanogaster and its homologues such as the mitochondrial FMP27 protein from yeast (also known as Hob1) and BLTP2 (also known as KIAA0100) from human. These proteins are localized to endoplasmic reticulum-plasma membrane (ER-PM) contact sites described as conserved lipid-binding proteins. They are tube-forming transport proteins which bind to phosphatidylinositols and affect phosphatidylinositol-4,5-bisphosphate (PtdIns-4,5-P2) distribution [InterPro reference PUB00101862,InterPro reference PUB00101860,InterPro reference PUB00101861]. They belong to the repeating beta-groove (RBG) superfamily together with VPS13, ATG2, SHIP164, Csf1/BLTP1 proteins, which are all conserved lipid transfer proteins containing long hydrophobic grooves [InterPro reference PUB00101860,InterPro reference PUB00101861]. They all share the same structure consisting of multiple repeating modules comprising five beta-sheets followed by a loop.
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
7 verified sequence examples. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| Q06116 | Protein YPR117W Saccharomyces cerevisiae (strain ATCC 204508 / S288c) | 2489 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
| Q06179 | Protein FMP27, mitochondrial Saccharomyces cerevisiae (strain ATCC 204508 / S288c) | 2628 aa; version 1 UniProt 2026_03 | UNIPROT FETCH |
| Q14667 | Bridge-like lipid transfer protein family member 2 Homo sapiens | 2235 aa; version 3 UniProt 2026_03 | PTM REGISTRY MIRROR |
| Q5SYL3 | Bridge-like lipid transfer protein family member 2 Mus musculus | 2234 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| Q6IMT0 | Protein KINKY POLLEN Arabidopsis thaliana | 2587 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| Q6IMT1 | Protein SABRE Arabidopsis thaliana | 2603 aa; version 1 UniProt 2026_03 | UNIPROT FETCH2 sibling references |
| Q9VZS7 | Protein hobbit Drosophila melanogaster | 2300 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
- 4,971
- matches
- 6,616
- proteomes
- 2,947
- taxa
- 7,811
- structures
- 0
- alphafold models
- 835
- domain architectures
- 118
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
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.