TolA

• PFAM accession number: PF06519
• Interpro abstract (IPR014161):

  Tol proteins are involved in the translocation of group A colicins. Colicins are bacterial protein toxins, which are active against Escherichia coli and other related species. TolA is anchored to the cytoplasmic membrane by a single membrane spanning segment near the N terminus, leaving most of the protein exposed to the periplasm [ (PUBMED:12423782) ].

  TolA couples the inner membrane complex of itself with TolQ and TolR to the outer membrane complex of TolB and OprL (also called Pal). Most of the length of the protein consists of low-complexity sequence that may differ in both length and composition from one species to another, complicating efforts to discriminate TolA (the most divergent gene in the tol-pal system) from paralogs such as TonB. Selection of members of the seed alignment and criteria for setting scoring cut-offs are based largely on conserved operon structure. The Tol-Pal complex is required for maintaining outer membrane integrity, and is also involved in transport (uptake) of colicins and filamentous DNA, and implicated in pathogenesis. Transport is energized by the proton motive force. TolA is an inner membrane protein that interacts with periplasmic TolB and with outer membrane porins OmpC, PhoE and LamB.

• GO process: bacteriocin transport (GO:0043213)
• GO component: integral component of membrane (GO:0016021)
• GO function: toxin transmembrane transporter activity (GO:0019534)

This is a PFAM domain. For full annotation and more information, please see the PFAM entry TolA