1.2.1.20 metabolism glutarate semialdehyde dehydrogenase encoded by davD converts glutarate semialdehyde into glutaric acid. In the natural L-lysine catabolic pathway of Pseudomonas strains, glutaric acid is then further converted to acetyl-CoA, a main intermediate of Krebs cycle -, 754623 1.2.1.20 metabolism the enzyme is involved in the metabolic pathways for the production of 5-aminovalerate and glutarate from L-lysine -, 743218