4,5-Dihydroxy-2,3-pentanedione DPD

A novel AI-2 furanosyl borate diester complex (6) was originally identified in the bioluminescent marine bacterium Vibrio harveyi as one of two autoinducers that regulate light production in response to cell density [29, 30]. AI-2 is produced from S-adenosylmethionine in at least three enzymatic steps [31, 32]. In the final stage 4,5-dihydroxy-2,3-pentanedione (DPD) (7) is converted to the cyclic form of DPD, which is named pro-AI-2 (8), and can react with borate to form a cyclic borate... 

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