Regulation of central carbon metabolism and storage polymers by PTS(Ntr) in Rhizobium leguminosarum.

Disruption of PTS Ntr signaling in Rhizobium leguminosarum reprograms carbon allocation, mimicking nitrogen starvation even under nitrogen-replete conditions.

• Why it matters: Understanding how bacteria coordinate carbon and nitrogen metabolism is crucial for insights into microbial survival, plant symbiosis, and environmental adaptation, yet this regulation remains poorly understood.
• What they did: The study examined the effects of PTS Ntr components, ManX and HprK, on central metabolism and storage polymer accumulation, using genetic mutants and biochemical analyses to assess enzyme activity and metabolite levels.
• The result: Disruption of PTS Ntr signaling led to increased storage polymer production and altered TCA cycle activity, revealing a regulatory link that uncouples growth from storage and influences bacterial adaptation strategies.