Abstract
3-Dehydroshikimate was formed with a yield of 57-77% from quinate via 3-dehydroquinate by two successive enzyme reactions, quinoprotein quinate dehydrogenase (QDH) and 3-dehydroquinate dehydratase, in the cytoplasmic membranes of acetic acid bacteria. 3-Dehydroshikimate was then reduced to shikimate (SKA) with NADP-dependent SKA dehydrogenase (SKDH) from the same organism. When SKDH was coupled with NADP-dependent D-glucose dehydrogenase (GDH) in the presence of excess D-glucose as an NADPH re-generating system, SKDH continued to produce SKA until 3-dehydroshikimate added initially in the reaction mixture was completely converted to SKA. Based on the data presented, a strategy for high SKA production was proposed.
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