• Ribonucleotide reductases (RNR) are indispensable enzymes that convert ribonucleotides to deoxyribonucleotides (dNTPs), the precursors to make up DNA. • Because DNA synthesis is fundamental to cell survival, RNR activity must be tightly controlled. • In bacteria, this control is exerted by a specialized transcriptional regulator, NrdR, which has no equivalent in eukaryotic organisms and therefore represents a potential selective target for antimicrobial development. • Despite its central role, the structural basis of NrdR’s function and the mechanisms by which it senses cellular nucleotide levels and modulates RNR expression have remained only partially understood.
Article Summaries:
- Scientists have revealed new details about NrdR, a bacterial transcription regulator that controls ribonucleotide reductase (RNR) activity, the enzyme essential for DNA synthesis. The study clarifies how NrdR senses cellular nucleotide levels and modulates RNR expression, filling gaps in the structural understanding of this unique regulator. Because NrdR has no counterpart in eukaryotes, the findings highlight it as a promising selective target for next‑generation antibiotics. The research suggests that disrupting NrdR function could impair bacterial DNA production without affecting human cells, offering a potential pathway for novel antimicrobial development.
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