FIG 5.
Schematic model proposed for the regulation of the tannase and gallate decarboxylase operons in L. plantarum WCFS1. Genes encoding tannase (tanBLp), gallate decarboxylase (lpdBCD), gallate transport protein (gacP), and the tannin transcriptional regulator (tanR) are represented by arrows. The unspecific ABC transporters Lp_2739 and Lp_2740 are shown in the membrane. Dark blue circles represent TanR not bound to gallic acid. Gallic acid is represented by orange circles. The thin green and red arrows represent the progression of transcription and the blockage of the tannase and gallate decarboxylase operons, respectively. GA-E, gallic acid esters; GA, gallic acid; PG, pyrogallol.