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The haloarchaeon Haloferax volcanii degrades D‐glucose via the semiphosphorylative Entner‐Doudoroff pathway and D‐fructose via a modified Embden‐Meyerhof pathway. Here, we report the identification of GfcR, a novel type of transcriptional regulator that functions as an activator of both D‐glucose and D‐fructose catabolism. We find that in the presence of D‐glucose, GfcR activates gluconate dehydratase,...
Pyruvate kinases (PKs) synthesize ATP as the final step of glycolysis in the three domains of life. PKs from most bacteria and eukarya are allosteric enzymes that are activated by sugar phosphates; for example, the feed‐forward regulator fructose‐1,6‐bisphosphate, or AMP as a sensor of energy charge. Archaea utilize unusual glycolytic pathways, but the allosteric properties of PKs from these species...
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