Figure 1

The pln locus in L. plantarum C11 and sequence alignment of the two tandem repeats located in the pln promoters of five different strains of L. plantarum (C11, WCFS1, NC8, J23 and J51). (a) Genetic organisation of the pln locus in L. plantarum C11 and sequences of the conserved tandem repeats (left (L) and right (R) repeat) involved in regulation of the pln operons. Lollipops indicate the position of the regulatory repeats. (b) The regulatory repeats from all five pln loci organised based on which operons they control. Conserved nucleotides are shown in bold letters and non-consensus nucleotides that are conserved within the functional groups are boxed. Nucleotides in the two tandem repeats that are 100% conserved are marked with an asterisk, and highly conserved and moderately conserved nucleotides are marked with two dots and one dot, respectively. The two arrows indicate nucleotides that have been shown to be crucial for binding of both PlnC and PlnD [22].