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, increasing storage polymers and mimicking nitrogen starvation under nutrient-rich conditions.

• Why it matters: Understanding how bacteria coordinate carbon and nitrogen metabolism is crucial for insights into their survival, growth, and symbiosis, yet the regulatory mechanisms remain poorly characterized.
• What they did: The study examined the roles of PTS Ntr components, ManX and HprK, through genetic mutants and biochemical assays, revealing their influence on TCA cycle activity and polymer accumulation.
• The result: Findings demonstrate that PTS Ntr regulators control central metabolism and storage polymer production, linking carbon-nitrogen signaling to bacterial adaptation and symbiotic efficiency.