FAD-dependent catabolic D-arginine dehydrogenase DauA

UniProtKB accession:  Q9HXE3

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UniProtKB description:  DauA is highly expressed within the cystic fibrosis (CF) lung, and it is required for virulence via the optimal production of hydrogen cyanide, pyocyanine, pyoverdine, rhamnolipid and alginate during biofilm formation (PubMed:24011342). Involved in the catabolism of D-lysine and D-arginine. Under aerobic conditions, the arginine succinyltransferase (AST) and arginine transaminase (ATA) pathways are 2 major routes for L-arginine utilization as the sole source of carbon and nitrogen. The D-to-L racemization of arginine by DauA and DauB is necessary, before to be channeled into the AST and/or ATA pathways. DauA catalyzes the flavin-dependent oxidative deamination of D-arginine into 2-ketoarginine (2-KA) and ammonia (PubMed:3141581, PubMed:19139398, PubMed:19850617, PubMed:20809650). It has also dehydrogenase activity towards D-lysine, D-tyrosine, D-methionine, D-phenylalanine, D-ornithine, D-histidine and D-leucine as substrates (PubMed:19850617, PubMed:20809650).