tatC (PA5070, Q9HUB3) review notes

No deep-research provider was available. Sources: UniProt record (Q9HUB3, HAMAP
MF_00902), cached PMID:16621825 (abstract only; PMC full text body not returned by
the PubMed MCP).

Function

Core subunit of the Tat translocon; TatBC receptor recognises twin-arginine
signal peptides [file:PSEAE/tatC/tatC-uniprot.txt "Part of the twin-arginine
translocation (Tat) system that transports large folded proteins containing a
characteristic twin-arginine motif in their signal peptide across membranes.
Together with TatB, TatC is part of a receptor directly interacting with Tat
signal peptides"].
Tat pathway required for PvdN export and pyoverdine [PMID:16621825 "export is Tat
dependent"; "no Pvd was produced"].

PseudoCAP IBA-seed assessment

PTN node	node term	n_seeds	leaf IBAs	seed annotation (term, evidence, PMID)	verdict	rationale	other seeds	IBD stands without this seed?
PTN000769484	GO:0033281 TAT protein transport complex	3	129 (76 taxa)	GO:0033281 TAT protein transport complex, IMP, PMID:16621825 (PseudoCAP)	SOUND	PMID:16621825 is a tat-pathway phenotype paper (PvdN export, pyoverdine), so the IMP evidence for complex membership is indirect; but TatC is unambiguously the core subunit of the Tat complex by family assignment (HAMAP MF_00902, NCBIfam tatC, PROSITE TATC), so the membership claim is correct. The node term fits the TatC clade.	E. coli TatC P69423 (canonical, strong experimental grounding), Arabidopsis AT2G01110	Yes; E. coli TatC anchors the node. No GO_CENTRAL defect.

The same node correctly carries GO:0009977 (PMF-dependent protein transmembrane
transporter activity), GO:0043953 (protein transport by the Tat complex) and
GO:0065002 (intracellular protein transmembrane transport), all seeded by E. coli
TatC; these were accepted on this gene.

PseudoCAP defects from this gene: none. The seed's evidence is phenotypic rather
than a direct complex assay, but the claim is correct and the IBD is anchored by
E. coli TatC, so no defect is raised (verdict SOUND).