alexa Substrate Analogue Targeting Glutamate Racemase (MurI) Alters Cellular Morphogenesis And Inhibits Biofilm Formation In Streptococcus Mutans
ISSN: 2332-0702

Journal of Oral Hygiene & Health
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2nd International Conference on Restorative Dentistry and Prosthodontics
May 01-02, 2017 Toronto, Canada

Jian-Ying Zhang and Jun-Qi Ling
Central South University, China
Sun Yat-sen University, China
Posters & Accepted Abstracts: J Oral Hyg Health
DOI: 10.4172/2332-0702-C1-006
Abstract
D-Glutamate (D-Glu) is an essential biosynthetic building block of the peptidoglycans that encapsulate the bacterial cell wall. Glutamate racemase (MurI) catalyses the reversible formation of D-glutamate from L-glutamate and, hence, the enzyme is a potential therapeutic target. The current study was designed to identify novel molecules that target glutamate racemase, thereby mitigating S. mutans cariogenic capacities, inhibiting biofilm formation and having the potential to prevent dental caries. High throughput screening of approximately 250 commercially available compounds against the recombinant S. mutans glutamate racemase resulted in the identification of a substrate-product analogue, D-glutamine, as a modest competitive inhibitor of glutamate racemase. In vitro assays, the addition of D-glutamine blocked the D-Glu metabolic way in S. mutans, leading to malformations in bacterial cell wall, inhibition of biofilm formation, and reductions in extracellular polysaccharide (EPS) synthesis without necessarily killing this bacterium directly. The exogenous addition of D-Glu could partially reverse the inhibitory effect of D-glutamine. In conclusion, these findings suggest that the substrate analogue of glutamate racemase represents a promising anti-cariogenic agent in that it suppresses virulence properties of S. mutans by affecting D-Glu metabolism.
Biography

Email: zhjiangying_csu@hotmail.com

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