Rv2802c Still unknown · low auto-curated
H37Rv Rv2802c · MTBC0 mtbc0_002982 ·
347 aa · 3133195–3134238 (-) ·
RefSeq NP_217318.1
Annotation: from legacy to revised
| Legacy (H37Rv / Mycobrowser) | arginine/hypothetical protein |
|---|---|
| MTBC0 PGAP re-annotation | DUF2293 domain-containing protein |
| Revised (this work) | Conserved hypothetical protein; DUF domain(s) DUF2293. Function unknown. |
Auto-curated: this verdict and function were generated by rules from PGAP + Pfam + Foldseek and have not been hand-reviewed.
Curated reference (UniProt)
| UniProt |
P71649
TrEMBL · unreviewed
· Evidence at protein level
|
|---|---|
| UniProt name | Hypothetical arginine and alanine rich protein |
Functional vocabulary (eggNOG-mapper, orthology transfer)
| COG category |
S Function unknown
|
|---|---|
| eggNOG description | Uncharacterized conserved protein (DUF2293) |
| Orthologous group | COG5586 |
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 | 0.305 · purifying |
|---|---|
| Polymorphic sites (≥ 0.1% of strains) | 25 synonymous, 21 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 |
|---|---|---|---|---|
DUF2293 | PF10056.15 | 6.5e-27 | 257–343 | Uncharacterized conserved protein (DUF2293) |
Functional interaction network (STRING v12, guilt-by-association)
Closest characterised functional partner: mazF9 (mRNA interferase MazF9), medium confidence from genomic context alone (score 693 excluding text-mining).
| Partner | Product | Score | No text-mining | Channels (≥400) |
|---|---|---|---|---|
Rv2801c mazF9 |
mRNA interferase MazF9 | 694 | 693 ctx | neighborhood:676 |
Rv2801A mazE9 |
antitoxin MazE9 | 665 | 665 ctx | neighborhood:665 |
Rv2803 hyp |
hypothetical protein | 583 | 582 ctx | neighborhood:581 |
Rv3351c hyp |
hypothetical protein | 439 | 439 ctx | cooccurence:438 |
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
- Legacy H37Rv annotation: arginine/hypothetical protein
- MTBC0 PGAP product: DUF2293 domain-containing protein
- Pfam (hmmscan --cut_ga): DUF2293 PF10056.15 (E=7e-27)
- (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 NP_217318.1)
- Domains: Pfam-A via hmmscan --cut_ga — DUF2293 (PF10056.15)
- 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
COG5586 - Curated reference: UniProt P71649 (TrEMBL, unreviewed; 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 —
4 functional partner(s); context anchor
mazF9 - Primary literature: none located yet; annotation rests on the domain/homology sources above.
Ancestral MTBC0 protein sequence
>mtbc0_002982|Rv2802c| MARQPLEQRVARAAQAALARQRFVSAIDVLLGLGWLAPSHVDQWRQGRVDSLEQVVQANLSKITAVMAALRRWARDRGLNPSETDYVARTRDRRRLRFSVTGEDAIERAYRTHWVSPELSERAVARQSRRPDLVVIMPVNDWSCASCGGSGDLMFLEDAGPLCLDCADLGHLVFLPSGDAALTRRAKRASRLSAVVVRWSRARKRYERQGILVEAEALERAENECLADAEVRARRRERDEARRANEDLRLQAEFGAAIRTLFPNCPAGRAEAIARHAATRGSGRIGRSAAGRALDPEAVRLAVAASVRHIDTSFDELLMSGVDRETARHRVGEHVEEVLRDWRATSR