TraN is a large cysteine-rich outer membrane protein involved in the mating-pair stabilisation (adhesin) component of the F-type conjugative plasmid transfer system. TraN is believed to interact with the core type IV secretion system apparatus through the TraV protein [1][2][3].

1: Characterization of the F plasmid mating aggregation gene traN and of a new F transfer region locus trbE. Maneewannakul S, Kathir P, Ippen-Ihler K; J Mol Biol 1992;225:299-311. PMID:1593622

2: F factor conjugation is a true type IV secretion system. Lawley TD, Klimke WA, Gubbins MJ, Frost LS; FEMS Microbiol Lett. 2003;224:1-15. PMID:12855161

3: Mobile genetic elements: the agents of open source evolution. Frost LS, Leplae R, Summers AO, Toussaint A; Nat Rev Microbiol. 2005;3:722-732. PMID:16138100