PMCC PMCC

Search tips
Search criteria

Advanced
Results 1-1 (1)
 

Clipboard (0)
None

Select a Filter Below

Journals
Authors
Year of Publication
Document Types
1.  Transcriptional Repressor Rex Is Involved in Regulation of Oxidative Stress Response and Biofilm Formation by Streptococcus mutans 
FEMS microbiology letters  2011;320(2):110-117.
The transcriptional repressor Rex has been implicated in regulation of energy metabolism and fermentative growth in response to redox potential. Streptococcus mutans, the primary causative agent of human dental caries, possesses a gene that encodes a protein with high similarity to members of the Rex family of proteins. In this study, we showed that Rex-deficiency compromised the ability of S. mutans to cope with oxidative stress and to form biofilms. The Rex-deficient mutant also accumulated less biofilm after 3-days than the wild-type strain, especially when grown in sucrose-containing medium, but produced more extracellular glucans than the parental strain. Rex-deficiency caused substantial alterations in gene transcription, including those involved in heterofermentative metabolism, NAD+ regeneration and oxidative stress. Among the up-regulated genes was gtfC, which encodes glucosyltransferase C, an enzyme primarily responsible for synthesis of water-insoluble glucans. These results reveal that Rex plays an important role in oxidative stress responses and biofilm formation by S. mutans.
doi:10.1111/j.1574-6968.2011.02293.x
PMCID: PMC3115380  PMID: 21521360
Redox sensing; oxidative stress; biofilm formation; Streptococcus mutans

Results 1-1 (1)