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Updated: May 9, 2026

Purification of a High Molecular Mass Protein in Streptococcus mutans
Published on: September 14, 2019
Curcumin inhibits the Sortase A activity of the Streptococcus mutans UA159
Ping Hu1, Ping Huang, Wei Min Chen
1Center of Stomatology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, No. 1095, Jiefang Road, Wuhan 430030, People's Republic of China, gloriaping@126.com.
Abstract:
Streptococcus mutans (S. mutans) forms part of the commensal microflora and is deemed to be the major pathogen responsible for the generation of dental caries. The enzyme, sortase A enzyme, modulates the surface properties and cariogenicity of S. mutans. Curcumin has been reported to be an inhibitor of Staphylococcus aureus sortase A. In this study, inhibition of a purified S. mutans UA159 sortase A by curcumin was evaluated. Curcumin exerted strong inhibitory activity with a half maximal inhibitory concentration (IC50) of 10.2 ± 0.7 μM which was lower than the minimum inhibitory concentration of 175 μM and the minimum bactericidal concentration of 350 μM. These results indicated that curcumin is a S. mutans UA159 sortase A inhibitor and therefore represents as a promising anticaries agent.
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