FIG. 1.

Schematic diagram of the protocatechuate (PCA) branch of the β-ketoadipate pathway (A) and genetic organization of the genes involved in C. glutamicum and other bacteria (B). The complete designations of all regulator genes are indicated, and the pcaO gene is indicated by shading. Other pca genes are indicated by capital letters. PcaHG, PCA 3,4-dioxygenase; PcaB, β-carboxy-cis,cis-muconate cycloimerase; PcaC, γ-carboxymuconolactone decarboxylase; PcaD, β-ketoadipate enol-lactone hydrolase; PcaIJ, β-ketoadipate succinyl-coenzyme A transferase; PcaF, β-ketoadipate coenzyme A thiolase; TCA, tricarboxylic acid cycle.