Prokaryotic long-chain fatty acid CoA synthetases similar to Escherichia coli FadD
This subfamily of the AMP-forming adenylation family contains Escherichia coli FadD and similar prokaryotic fatty acid CoA synthetases. FadD was characterized as a long-chain fatty acid CoA synthetase. The gene fadD is regulated by the fatty acid regulatory protein FadR. Fatty acid CoA synthetase catalyzes the formation of fatty acyl-CoA in a two-step reaction: the formation of a fatty acyl-AMP molecule as an intermediate, followed by the formation of a fatty acyl-CoA. This is a required step before free fatty acids can participate in most catabolic and anabolic reactions.