ArticleMolecular microbiology2021
Molecular mechanisms controlling fructose-specific memory and catabolite repression in lactose metabolism by Streptococcus mutans.
Article in Molecular microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 39 citations in OpenAlex.
- AJournal of bacteriology · 2026Review
- Mechanisms of caries induced by sugars: a narratives review from microbial metabolism to oral ecological imbalance and public health strategies for caries prevention.Frontiers in cellular and infection microbiology · 2026Review
- Pyruvate metabolism is involved in adaptability and cariogenicity ofJournal of oral microbiology · 2026Review
- Article
- Exploring Naturally Tailored Bacterial Outer Membrane Vesicles for Selective Bacteriostatic Implant Coatings.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- luxS contributes to intramacrophage survival of Streptococcus agalactiae by positively affecting the expression of fruRKI operon.Veterinary research · 2023Article
- Identification of Putative Bacterial Pathogens for Orofacial Granulomatosis Based on 16S rRNA Metagenomic Analysis.Microbiology spectrum · 2023Article
- Current and prospective therapeutic strategies: tacklingFrontiers in cellular and infection microbiology · 2023Review
- AhrC Negatively Regulates Streptococcus mutans Arginine Biosynthesis.Microbiology spectrum · 2022Article
- TheMicrobiology spectrum · 2022Article
- [Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2022Article
- Spontaneous Mutants of Streptococcus sanguinis with Defects in the Glucose-Phosphotransferase System Show Enhanced Post-Exponential-Phase Fitness.Journal of bacteriology · 2021Article
- Subpopulation behaviors in lactose metabolism by Streptococcus mutans.Molecular microbiology · 2021Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
Lactose is an abundant dietary carbohydrate metabolized by the dental pathogen Streptococcus mutans. Lactose metabolism presents both classic diauxic behaviors and long-term memory, where the bacteria can pause for >11 h before initiating growth on lactose. Here, we explored mechanisms contributing to unusual aspects of regulation of the lac operon. The fructose-phosphate metabolites, F-1-P and F-6-P, could modulate the DNA-binding activities of the lactose repressor. Recombinant LacR proteins bound upstream of lacA and Gal-6-P induced the formation of different LacR-DNA complexes. Deletion of lacR resulted in strain-specific growth phenotypes on lactose, but also on a number of mono- and di-saccharides that involve the glucose-PTS or glucokinase in their catabolism. The phenotypes were consistent with the novel findings that loss of LacR altered glucose-PTS activity and expression of the gene for glucokinase. CcpA was also shown to affect lactose metabolism in vivo and to bind to the lacA promoter region in vitro. Collectively, our study reveals complex molecular circuits controlling lactose metabolism in S. mutans, where LacR and CcpA integrate cellular and environmental cues to regulate metabolism of a variety of carbohydrates that are critical to persistence and pathogenicity of S. mutans.
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