Rv0920c Family assigned · medium auto-curated
H37Rv Rv0920c · MTBC0 mtbc0_000978 ·
439 aa · 1028712–1030031 (-) ·
RefSeq NP_215435.1
Annotation: from legacy to revised
| Legacy (H37Rv / Mycobrowser) | transposase |
|---|---|
| MTBC0 PGAP re-annotation | IS256-like element IS1554 family transposase |
| Revised (this work) | IS256-like element IS1554 family transposase. Pfam: Transposase_mut (PF00872.25). |
Auto-curated: this verdict and function were generated by rules from PGAP + Pfam + Foldseek and have not been hand-reviewed.
Curated reference (UniProt)
| UniProt |
I6Y941
TrEMBL · unreviewed
· Inferred from homology
|
|---|---|
| UniProt name | Mutator family transposase |
| Curated function | Required for the transposition of the insertion element. |
Functional vocabulary (eggNOG-mapper, orthology transfer)
| COG category |
L Replication, recombination and repair
|
|---|---|
| eggNOG description | Transposase |
| Orthologous group | COG3328 |
| KEGG orthology |
K07493
|
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 | 1.965 · diversifying/relaxed |
|---|---|
| Polymorphic sites (≥ 0.1% of strains) | 1 synonymous, 5 missense, 1 nonsense, 0 frameshift |
| Disruption | 1 distinct premature-stop/frameshift site(s); most common in 0.14% of strains (208) · clonal |
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 |
|---|---|---|---|---|
Transposase_mut | PF00872.25 | 4.8e-151 | 31–405 | Transposase, Mutator family |
Functional interaction network (STRING v12, guilt-by-association)
Closest characterised functional partner: Rv0921 (resolvase), medium confidence from genomic context alone (score 442 excluding text-mining).
| Partner | Product | Score | No text-mining | Channels (≥400) |
|---|---|---|---|---|
Rv0921 |
resolvase | 442 | 442 ctx | neighborhood:440 |
Rv0922 tnpB |
transposase | 440 | 437 ctx | neighborhood:434 |
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: transposase
- MTBC0 PGAP product: IS256-like element IS1554 family transposase
- Pfam (hmmscan --cut_ga): Transposase_mut PF00872.25 (E=5e-151)
- (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_215435.1)
- Domains: Pfam-A via hmmscan --cut_ga — Transposase_mut (PF00872.25)
- 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
COG3328 - Curated reference: UniProt I6Y941 (TrEMBL, unreviewed; Inferred from homology)
- 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 —
2 functional partner(s); context anchor
Rv0921 - Primary literature: none located yet; annotation rests on the domain/homology sources above.
Ancestral MTBC0 protein sequence
>mtbc0_000978|Rv0920c| MDAAQVIEPAHAGQDVDEAAVAARELSGAERALVGDLVRQARAEGVALTGPDGLLKALTKTVLEAALQEEMTEHLGYDRHAAAGRGSGNSRNGSRNKKVITDACGQVEIAVPRDRNGTFEPVIVGKRKRRVTDVDRVVLSLYAKGLTTGEIAAHFADVYGVSVSKDTISRITDRVIEEMQAWWSRPLEKVYAAVFIDAIMVKIRDGQVRNRPVYAAIGVDLDGHKDILGMWAGEGDGESAKFWLAVLTDLRNRGVKDIFFLVCDGLKGLPDSVSAAFPLATVQTCIIHLIRNTFRYASRKYWDKISVDLKPIYTAASAAEARLRYEEFAEKWGKPYPAITRLWDSAWEEFIPFLDYDVEIRRVPCSTNAIESLNARYRRAVRARGHFPNEQSALKTLYLVTRSLDPKGTGQTKWAVRWKPALNALAITFADRMPAAEER