PE23 Family assigned · medium auto-curated
H37Rv Rv2328 · MTBC0 - ·
382 aa · 2600731–2601879 (+) ·
RefSeq YP_177867.1
Annotation: from legacy to revised
| Legacy (H37Rv / Mycobrowser) | PE family protein PE23 |
|---|---|
| MTBC0 PGAP re-annotation | — |
| Revised (this work) | PE family protein PE23. Pfam: PE (PF00934.26). |
Auto-curated: this verdict and function were generated by rules from PGAP + Pfam + Foldseek and have not been hand-reviewed.
Annotated on the H37Rv protein: this gene has no 1:1 ancestral MTBC0 anchor (PE/PPE, paralogue, IS element, or otherwise unanchored CDS).
Curated reference (UniProt)
| UniProt |
P9WIG9
SwissProt · reviewed
· Evidence at protein level
|
|---|---|
| UniProt name | Uncharacterized PE family protein PE23 |
UniProt still lists this protein as Uncharacterized PE family protein PE23; the revised annotation above is ahead of the current UniProt record.
Functional vocabulary (eggNOG-mapper, orthology transfer)
| COG category |
I Lipid transport and metabolism
|
|---|---|
| eggNOG description | acetylesterase activity |
| Orthologous group | COG0657 |
| EC number |
EC 3.1.1.3
|
| KEGG orthology |
K01046
|
| KEGG pathways |
map00561, map01100
|
| KEGG modules |
M00098
|
Orthology-based transfer (eggNOG 5.0.2, diamond). EC/KO/GO/CAZy are computed annotations, not manual curation; cross-check against the primary literature before treating a specific reaction as established.
Conservation & selection (intra-MTBC, 145 209 strains)
| pN/pS | n/a |
|---|---|
| Polymorphic sites (≥ 0.1% of strains) | 0 synonymous, 4 missense, 0 nonsense, 0 frameshift |
pN/pS from segregating SNPs (singletons removed) normalised by possible sites. Low pN/pS = purifying selection (a strong signal that a "hypothetical" is a real, constrained gene). A high pN/pS is ambiguous: relaxed constraint or positive selection (drug resistance, antigenic variation) inflate it; e.g. rpoB/katG/pncA score high here for resistance, not loss of function. A clonal disruption (one allele over a clade) suggests lineage pseudogenisation; a convergent one (many independent alleles) is typical of resistance loss-of-function.
Domains (Pfam, hmmscan --cut_ga)
| Pfam | Accession | i-Evalue | Residues | Description |
|---|---|---|---|---|
PE | PF00934.26 | 7.8e-31 | 4–94 | PE family |
Functional interaction network (STRING v12, guilt-by-association)
| Partner | Product | Score | No text-mining | Channels (≥400) |
|---|---|---|---|---|
Rv2133c hyp |
hypothetical protein | 871 | 863 | experimental:772 database:425 |
Rv2555c alaS |
alanine--tRNA ligase | 848 | 836 | experimental:570 database:622 |
Rv2267c stf3 hyp |
hypothetical protein | 817 | 766 | experimental:454 database:583 |
Rv2101 helZ |
helicase HelZ | 779 | 766 | database:613 |
Rv1691 hyp |
hypothetical protein | 778 | 766 | experimental:454 database:583 |
Rv3529c hyp |
hypothetical protein | 778 | 766 | experimental:454 database:583 |
Rv0719 rplF |
50S ribosomal protein L6 | 743 | 743 | experimental:415 database:579 |
Rv0722 rpmD |
50S ribosomal protein L30 | 740 | 740 | database:543 |
Rv3457c rpoA |
DNA-directed RNA polymerase subunit alpha | 747 | 738 | database:622 |
Rv0492c |
GMC-type oxidoreductase | 739 | 729 | database:573 |
Rv3409c choD |
cholesterol oxidase | 739 | 729 | database:573 |
Rv1279 |
GMC-type oxidoreductase | 739 | 729 | database:573 |
Rv0697 mftG |
dehydrogenase | 739 | 729 | database:573 |
Rv1390 rpoZ |
DNA-directed RNA polymerase subunit omega | 720 | 719 | database:624 |
Rv0703 rplW |
50S ribosomal protein L23 | 716 | 715 | database:548 |
STRING combines evidence channels (neighborhood, fusion, cooccurrence, coexpression, experimental, database, text-mining) into a 0–1000 score. The ctx badge marks edges carried by the genomic-context channels (conserved neighborhood, fusion, phylogenetic co-occurrence), which are independent of orthology and structure and the strongest signal for an unknown gene. The no text-mining column recomputes the score from data alone, so a link that does not depend on the literature is visible. Association is a function hypothesis, not proof: corroborate with the operon context and the primary literature before assigning a function.
Evidence
- Annotation from H37Rv (no MTBC0 1:1 anchor; H37Rv protein used): PE family protein PE23
- Pfam (hmmscan --cut_ga): PE PF00934.26 (E=8e-31)
- (auto-curated by rules from PGAP + Pfam + Foldseek; not hand-reviewed)
Sources
- Ancestral sequence & coordinates: Harrison LB et al. (2024), An imputed ancestral reference genome for the MTBC, doi:10.1101/2023.09.07.556366
- Product annotation: NCBI PGAP on MTBC0; legacy from H37Rv NC_000962.3 (RefSeq YP_177867.1)
- Domains: Pfam-A via hmmscan --cut_ga — PE (PF00934.26)
- Sequence-level signal: ESM Atlas (EvolutionaryScale × BioHub) — exploratory
- Controlled vocabulary: eggNOG-mapper 2.1.12 (Cantalapiedra et al. 2021,
doi:10.1093/molbev/msab293), eggNOG 5.0 DB
(Huerta-Cepas et al. 2019) — OG
COG0657 - Curated reference: UniProt P9WIG9 (SwissProt, reviewed; Evidence at protein level)
- Intra-MTBC selection: pN/pS and disruption from SPDI variants of 145 209 MTBC strains (this work, local collection vs H37Rv NC_000962.3)
- Interaction network: STRING v12.0 (Szklarczyk et al. 2023, doi:10.1093/nar/gkac1000), taxon 83332, CC-BY 4.0 — 108 functional partner(s)
- Primary literature: none located yet; annotation rests on the domain/homology sources above.
Ancestral MTBC0 protein sequence
>H37Rv|Rv2328|PE23 MQFLSVIPEQVESAAQDLAGIRSALSASYAAAAGPTTAVVSAAEDEVSTAIASIFGAYGRQCQVLSAQASAFHDEFVNLLKTGATAYRNTEFANAQSNVLNAVNAPARSLLGHPSAAESVQNSAPTLGGGHSTVTAGLAAQAGRAVATVEQQAAAAVAPLPSAGAGLAQVVNGVVTAGQGSAAKLATALQSAAPWLAKSGGEFIVAGQSALTGVALLQPAVVGVVQAGGTFLTAGTSAATGLGLLTLAGVEFSQGVGNLALASGTAATGLGLLGSAGVQLFSPAFLLAVPTALGGVGSLAIAVVQLVQGVQHLSLVVPNVVAGIAALQTAGAQFAQGVNHTMLAAQLGAPGIAVLQTAGGHFAQGIGHLTTAGNAAVTVLIS