This 54 amino acid repeat is found in many hypothetical proteins. Several hypothetical proteins from C.glutamicum and C.efficiens along with PS1 protein contain this repeat region. The N-terminus region of PS1 contains an esterase domain which transfers corynomycolic acid. The C-terminus region consists of 4 tandem LGFP repeats. It is hypothesised that the PS1 proteins in Corynebacterium, when associated with the cell wall, may be anchored via the LGFP tandem repeats that may be important for maintaining cell wall integrity [Adindla et al. Comparative and Functional Genomics 2004; 5:2-16]. Deletion of Swiss:Q01377 protein results in a 10-fold increase in the cell volume of the organism and infers the corresponding proteins involvement in the cell shape formation [1]. The secondary structure of each repeat is predicted to comprise two beta-strands and one alpha-helix [Adindla et al. 2004].

1: Identification and functional analysis of six mycolyltransferase genes of Corynebacterium glutamicum ATCC 13032: the genes cop1, cmt1, and cmt2 can replace each other in the synthesis of trehalose dicorynomycolate, a component of the mycolic acid layer of Brand S, Niehaus K, Puhler A, Kalinowski J; Arch Microbiol 2003;180:33-44. PMID:12740729