This family represents the POTRA domain found in the membrane insertase TamA.

1: The structural basis of autotransporter translocation by TamA. Gruss F, Zahringer F, Jakob RP, Burmann BM, Hiller S, Maier T; Nat Struct Mol Biol. 2013;20:1318-1320. PMID:24056943

2: A comprehensive analysis of the Omp85/TpsB protein superfamily structural diversity, taxonomic occurrence, and evolution. Heinz E, Lithgow T; Front Microbiol. 2014;5:370. PMID:25101071