All families / PF10093
PF10093: EarP
Elongation-Factor P (EF-P) rhamnosyltransferase EarP
- Curation status
- SEEDED
- Seed status
- EX DUF
- Characterization
- UNSCORED
Grounding
PF10093: Elongation-Factor P (EF-P) rhamnosyltransferase EarP
IPR016633: integrated entry for Elongation-Factor P (EF-P) rhamnosyltransferase EarP
Source description
This entry includes family members such as EarP enzymes which are essential for post-translational activation of elongation factor P(EF-P). It was identified as EF-P arginine R32 specific rhamnosyl transferase in Shewanella oneidensis using dTDP-beta-L-rhamnose as donor substrate [InterPro reference PUB00091040]. This was further confirmed for Pseudomonas aeruginosa [InterPro reference PUB00091041], Pseudomonas putida [InterPro reference PUB00091042] and Neisseria meningitidis [InterPro reference PUB00091043]. As for S. oneidensis [InterPro reference PUB00091044] and P. aeruginosa [InterPro reference PUB00091045], EarP enzyme acts as an inverting glycosyltransferase, thus mediating the formation of an alpha-L-rhamnosidic linkage. Structural analysis show that EarP is composed of two opposing domains with Rossmann folds, thus constituting a B pattern-type glycosyltransferase (GT-B) and provide basis for arginine glycosylation by EarP [InterPro reference PUB00091042]. Mutational analysis of efp and earP genes, resulted in a substantial decrease in the production of rhamnolipids and pyocyanin (important factors for colonization and invasion during infection) of P. aeruginosa. Collectively this indicates that EarP and EF-P are essential for P. aeruginosa pathogenicity [InterPro reference PUB00091040].The protein family is also annotated in the CaZy Database as GT104.
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
3 verified sequence examples. FASTA
| UniProt | Protein / organism | Sequence | Provenance |
|---|---|---|---|
| E6MVV9 | Protein-arginine rhamnosyltransferase Neisseria meningitidis serogroup B / serotype 15 (strain H44/76) | 382 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| Q88LS1 | Protein-arginine rhamnosyltransferase Pseudomonas putida (strain ATCC 47054 / DSM 6125 / CFBP 8728 / NCIMB 11950 / KT2440) | 377 aa; version 1 UniProt 2026_03 | UNIPROT FETCH1 sibling references |
| Q9HZZ1 | Protein-arginine rhamnosyltransferase Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) | 376 aa; version 1 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
- 1,864
- matches
- 1,898
- proteomes
- 1,846
- taxa
- 2,406
- structures
- 12
- alphafold models
- 1,101
- domain architectures
- 4
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.