All families / PF06568
PF06568: YjiS-like
YjiS-like domain
- Curation status
- SEEDED
- Seed status
- EX DUF
- Characterization
- UNSCORED
Grounding
PF06568: YjiS-like domain
IPR009506: integrated entry for YjiS-like domain
Source description
This arginine rich domain is found at the C-terminal end of YjiS from Salmonella Typhimurium and similar short sequences from proteobacteria. YjiS, an inner membrane-associated small protein, acts as as a suppressor of flagella production, leading to pathogen escape from infected host cells [InterPro reference PUB00160930]. In the plant pathogen Agrobacterium tumefaciens, some small proteins that contain this domain are involved in nutrient acquisition and central carbon metabolism [InterPro reference PUB00160928]. CcaF1 from Rhodobacter sphaeroides is an RNA binding protein that has a role in the oxidative stress defence [InterPro reference PUB00160929]. In some uncharacterised proteins, this domain, previously known as DUF1127, covers the whole sequence.
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
1 verified sequence example. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| P39390 | Uncharacterized protein YjiS Escherichia coli (strain K12) | 54 aa; version 1 UniProt 2026_03 | UNIPROT FETCH2 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
- 9,243
- matches
- 9,266
- proteomes
- 2,798
- taxa
- 3,798
- structures
- 0
- alphafold models
- 5,914
- domain architectures
- 9
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.