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- W1215692518 abstract "The composition of oral biofilm communities, and their pathogenic potential, may depend on interspecies binding and communication interactions. Multivalent coadhesive interactions characterize the binding of Porphyromonas gingivalis to oral streptococci such as Streptococcus gordonii and drive subsequent development of heterotypic S. gordonii-P. gingivalis communities. Gene regulation by two-component systems (TCSs) is a common mechanism used by bacteria to modulate cell behavior in response to environmental changes. Following the initial binding interaction between P. gingivalis and S. gordonii, adherent P. gingivalis cells undergo a programmatic phenotypic shift in order to prepare for community living. P. gingivalis produces autoinducer 2 (AI-2) and responds both to homologous signal and to AI-2 from other organisms such as S. gordonii and Actinobacillus actinomycetemcomitans. The expression of GTF, Rgg, and exo-β;-D-fructosidase (fructanase) is downregulated in the absence of LuxS, whereas expression of tagatose 1,6-diphosphate aldolase is elevated. Contact with S. cristatus propagates a signal in P. gingivalis that causes downregulation of fimA expression. Signaling is mediated by arginine deiminase (ArcA) on the surface of Streptococcus cristatus. Biofilms tend to be polymicrobial in nature, and the subgingival plaque biofilm is an exemplar of this situation, with as many as 200 species present in any one individual." @default.
- W1215692518 created "2016-06-24" @default.
- W1215692518 creator A5008946134 @default.
- W1215692518 creator A5040308100 @default.
- W1215692518 date "2011-08-02" @default.
- W1215692518 modified "2023-09-25" @default.
- W1215692518 title "Heterotypic Streptococcus gordonii‐Porphyromonas gingivalis Communities: Formation, Gene Regulation, and Development" @default.
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