This family consists of several bacterial TraL proteins. TraL is a predicted peripheral membrane protein which is thought to be involved in bacterial sex pilus assembly [1]. The exact function of this family is unclear.

1: Analysis of the traLEKBP sequence and the TraP protein from three F-like plasmids: F, R100-1 and ColB2. Anthony KG, Kathir P, Moore D, Ippen-Ihler K, Frost LS; J Bacteriol 1996;178:3194-3200. PMID:8655498