PPE5 Family assigned · medium auto-curated

H37Rv Rv0304c · MTBC0 - · 2204 aa · 366150–372764 (-) · RefSeq YP_177714.1

Annotation: from legacy to revised

Legacy (H37Rv / Mycobrowser)PPE family protein PPE5
MTBC0 PGAP re-annotation
Revised (this work)PPE family protein PPE5. Pfam: Pentapeptide_2 (PF01469.25).

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 Q6MX49 TrEMBL · unreviewed · Predicted
UniProt namePPE family protein PPE5

Functional vocabulary (eggNOG-mapper, orthology transfer)

COG category N Cell motility
eggNOG descriptionPentapeptide repeats (8 copies)
Orthologous groupCOG3210

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 0.487 · purifying
Polymorphic sites (≥ 0.1% of strains) 28 synonymous, 40 missense, 1 nonsense, 3 frameshift
Disruption 4 distinct premature-stop/frameshift site(s); most common in 11.72% of strains (17022) · convergent

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)

PfamAccessioni-EvalueResiduesDescription
Pentapeptide_2PF01469.25 3.5e-121545–1583 Pentapeptide repeats (8 copies)

Functional interaction network (STRING v12, guilt-by-association)

Closest characterised functional partner: PPE6 (PPE family protein PPE6), high confidence from genomic context alone (score 947 excluding text-mining).

PartnerProductScoreNo text-miningChannels (≥400)
Rv0305c PPE6 PPE family protein PPE6 950 947 ctx neighborhood:618 coexpression:853
Rv0355c PPE8 PPE family protein PPE8 859 860 coexpression:850
Rv1548c PPE21 PPE family protein PPE21 854 854 coexpression:800
Rv3533c PPE62 PPE family protein PPE62 845 846 coexpression:796
Rv3903c cpnT hyp hypothetical protein 781 782 ctx cooccurence:753
Rv2082 hyp hypothetical protein 777 777 ctx cooccurence:774
Rv2209 integral membrane protein 775 775 ctx cooccurence:774
Rv0341 iniB isoniazid inducible protein IniB 775 775 ctx cooccurence:774
Rv2819c csm5 CRISPR type III-associated RAMP protein Csm5 782 774 ctx cooccurence:771
Rv1452c PE_PGRS28 PE-PGRS family protein PE_PGRS28 774 774 ctx cooccurence:774
Rv2490c PE_PGRS43 PE-PGRS family protein PE_PGRS43 774 774 ctx cooccurence:774
Rv3864 espE ESX-1 secretion-associated protein EspE 774 774 ctx cooccurence:771
Rv1651c PE_PGRS30 PE-PGRS family protein PE_PGRS30 774 774 ctx cooccurence:774
Rv1004c membrane protein 774 774 ctx cooccurence:774
Rv0872c PE_PGRS15 PE-PGRS family protein PE_PGRS15 773 773 ctx cooccurence:773

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): PPE family protein PPE5
  • Pfam (hmmscan --cut_ga): Pentapeptide_2 PF01469.25 (E=4e-12)
  • (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_177714.1)
  • Domains: Pfam-A via hmmscan --cut_ga — Pentapeptide_2 (PF01469.25)
  • 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 COG3210
  • Curated reference: UniProt Q6MX49 (TrEMBL, unreviewed; Predicted)
  • 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 — 134 functional partner(s); context anchor PPE6
  • Primary literature: none located yet; annotation rests on the domain/homology sources above.

Ancestral MTBC0 protein sequence

>H37Rv|Rv0304c|PPE5
MNLVSTTSGMSGFLNVGALGSGVANVGNTISGIYNVGTSDLSTPAVNSGLANIGTNIAGLLRDGAGTAAINLGLANHGNLNVGFASLGGFNFGGATIGHNNVGIGNTGIFDVGLANLGSYNIGFGNLGDDNLGFGNFGSYNIGFGNVGNDNLGFANAGGGNIGFANTGSNNVGFGNTGSNNVGIGLTGNGQIGFGSFNSGSGNIGLFNSGSNNIGFFNSGSGNFGIANSGSFNTGIGNTGNTNTGLFNSGDVNTGAFNPGSFNTGSFNTGSFNTGGFNPGNTNTGYLNIGNYNTGIANTGDVDTGAFITGNYSNGLFLSGDYQGLVGLNLVIDMPLPISLGVNIPIDIPITASAGNITLMGVTIPPTGDIVLSSIAGQRAHFGPITIPNITVVGPTTTVAIGGPNTAITITGGGAIRIPLISIPAAPGFGNSTTNPSSGFFNTGAGGASGFGNFGGANSGFWNLASATSGASGLLNVGALGSGLANVGTTVSGFYNTSTSDLATPAFNSGLANISTSIAGLLRDSTGTMVLNLGLANHGTLNVGIANLGDYNIGFANLGSANFGSANIGGNNIGGANTGIFDIGLANLGSYNIGFGNFGDDNLGFGNLGSYNVGFGNLGNDNLGFANTGSNNIGFANTGSNNIGIGLTGDGQIGFGSLNSGSGNIGLFNSGSGNIGFFNSGNGNVGIGNTGTANFGLGNTGSTNTGFFNSGDVNTGIGNTGSFNTGSFNPGDSNTGDFNPGSYNTGLGNTGDVDTGAFISGSYSNGFLWSGNYQGLIGLHAALAIPEIALTFGVDIPIHIPINIDAGVVTLQGFSIVAAENNIDFTPIIIPTINITLPTAAITVGGPTTSIGITASAGIGSITIPIIDIPATSGFGNSTTSPSSGFFNSGAGSASGFLNVVAGASGISGYLNVGALGSGVTNVGHTVSGFYNASALDLVTPAFASGLMRDGMGTMTLNLGLANLGSNNAGFGNTGIFDVGVANLGNYNIGFGNFGDDNLGFANLGSYNIGVANTGSNNIGFANTGSNNIGIGLTGTGQIGIGALNSGSGNIGLFNSGDGNIGFFNSGTGNFGIGNTGTGNFGIGNSGSTSTGLFNSGDGNTGGFNPGNFNTGNFNTGSFNTGGFNAGNTNTGHFNTGNYNTGIANTGDVSTGAFISGNYSNGILWRGDYQGLIGYSYALTIPEIPAHLDVNIPIDIPITGSFTDLVVDNFTIPIIGFESFAFSFHIHTEPDIGPIIVPSFVLSVPTFAIAVGGPTTAINISATAGLGPITIPIIDIPAAPGIGNSTTSPSSGFFNTGAGTASGFGNVGGNTSGLWNLASAASGVSGLLNVGALGSGVANVGNTISGIYNTSPLDLGTPAFGSGLANIAGLLQGGAGTTILDLAGLGNLNVGLANLGGSNFGIGNTGIFNVGFANVGNHNIGLANLGNYSVGFANSGNYHIGIANTGSANIGFANTGSGNIGIGLTGTGQIGFGSFNSGSHNIGLFNSGDGNVGFFNSGTGNVGIGNTGTANFGIANSGSFNTGLGNTGSTNTGLFNPGNVNTGVGNTGSINTGSINTGSFNTGSTNTGSFNLGDHNTGSFNSGDYNTGYFNAGDYNTGVANTGNVNTGAFISGNYSNGFFWRGDYQGLIGLSTTITIPEIPYRYDLSVPIDIPITGTVVATTPNSFTIPGFQIRVLLGPAAVLVNEMIGPITIDVNQVIAIDSPIQQTISMVGTGGFGPIPIGISIGGTPGFGNSTTGPSSGFFHTGAGHVSGFGNFGAGNMSGSGNFGAGNSGFFNAGGLGNSGLLNFGALQSGLANLGNTISGVYNTSTLDLATPAFGSGIANIGANLAGLFLDNTGNLTLNFGVANQGGLNAGIGNLGSVNIGFVNTGDSNLGIGNLGDLNFGGVNIGGNNIGIANTGIFDIGLANLGSYNIGLANLGDDNLGFGNAGSYNIGFANFGSDNLGFANTGSYNIGFANTGNNNIGVGLTGNGQIGIGSLNSGSNNIGLFNSGSGNIGFFNSGTGNVGIFNTGTGNFGLANSGGFNTGIGNAGSTNTGVFNPGDLNTGSFNPGSFNTGGFNPGSGNTGYLNTGDYNTGVANTGDVDTGAFITGSYSNGFLVSGDYQGLIGLPLLGIPVTPGYFNLTGGPSSGFFNSGAGSVSGFVNSGAGLSGYLNTGALGSGVANVGNTISGWLNASALDLATPGFLSGIGNFGTNLAGFFRG