This domain represents the presumed membrane spanning region of the OprF proteins. This region is involved in channel formation and is thought to form an 8-stranded beta-barrel [3].

1: Molecular characterization of the major outer-membrane protein OprF from plant root-colonizing Pseudomonas fluorescens. De Mot R, Schoofs G, Roelandt A, Declerck P, Proost P, Van Damme J, Vanderleyden J; Microbiology 1994;140:1377-1387. PMID:7521711

2: Involvement of the C-terminal part of Pseudomonas fluorescens OprF in the modulation of its pore-forming properties. El Hamel C, Freulet MA, Jaquinod M, De E, Molle G, Orange N; Biochim Biophys Acta 2000;1509:237-244. PMID:11118535

3: Ion channel formation by N-terminal domain: a common feature of OprFs of Pseudomonas and OmpA of Escherichia coli. Saint N, El Hamel C, De E, Molle G; FEMS Microbiol Lett 2000;190:261-265. PMID:11034289