Genetic Loci Associated With Fluoride Resistance in
Overview
Affiliations
The prolonged exposure of the cariogenic bacterial species to high concentrations of fluoride leads to the development of fluoride resistance in this species. Previous studies confirmed the involvement of a mutation in a single chromosomal region in the occurrence of fluoride resistance. The involvement of multiple genomic mutations has not been verified. The aim of this study is to identify multiple genetic loci associated with fluoride resistance in . The previously published whole genome sequences of two fluoride-resistant strains (UA159-FR and C180-2FR) and their corresponding wild-type strains (UA159 and C180-2) were analyzed to locate shared chromosomal mutations in fluoride-resistant strains. Both fluoride-resistant strains were isolated in laboratory by culturing their mother strains in media with high concentrations of fluoride. The corresponding gene expression and enzyme activities were accordingly validated. Mutations were identified in two glycolytic enzymes, namely pyruvate kinase and enolase. Pyruvate kinase was deactivated in fluoride-resistant strain C180-2FR. Enolase was less inhibited by fluoride in fluoride-resistant strain UA159-FR than in its wild-type strain. Mutations in the promoter constitutively increased the promoter activity and up-regulated the expression of the downstream fluoride antiporters in fluoride-resistant strains. Mutations in the intergenic region led to lower expression of , encoding a glycerol uptake facilitator protein, in fluoride-resistant strains than in wild-type strains. Our results revealed that there is overlap of chromosomal regions with mutations among different fluoride-resistant strains. They provide novel candidates for the study of the mechanisms of fluoride resistance.
Sun Y, Chen Y, Du Q, Zhang J, Xu M, Zheng G Front Microbiol. 2024; 15:1399525.
PMID: 39035442 PMC: 11257928. DOI: 10.3389/fmicb.2024.1399525.
Construction of an arrayed CRISPRi library as a resource for essential gene function studies in .
St Pierre J, Roberts J, Alam M, Shields R Microbiol Spectr. 2023; 12(1):e0314923.
PMID: 38054713 PMC: 10783072. DOI: 10.1128/spectrum.03149-23.
Singh A, Yadav V, Gautam H, Rathod L, Chundawat R, Singh G Front Microbiol. 2023; 14:1271034.
PMID: 37901824 PMC: 10603187. DOI: 10.3389/fmicb.2023.1271034.
Ecological influence by colonization of fluoride-resistant in oral biofilm.
Shen Y, Yu F, Qiu L, Gao M, Xu P, Zhang L Front Cell Infect Microbiol. 2023; 12:1106392.
PMID: 36699726 PMC: 9868560. DOI: 10.3389/fcimb.2022.1106392.
Thirumala M, Sai Krishna E, Sindhu Priya P, Vishnuvardhan Reddy S AIMS Microbiol. 2023; 8(4):470-483.
PMID: 36694586 PMC: 9834081. DOI: 10.3934/microbiol.2022031.