Antibiotic binding of STY3178, a yfdX protein from Salmonella Typhi.

Abstract

The yfdX family proteins are known for long time to occur in various virulent bacteria including their multidrug resistant (MDR) strains, without any direct assigned function for them. However, yfdX protein along with other proteins involved in acid tolerance response is reported to be up regulated by the multidrug response regulatory system in E. coli. Hence, molecular and functional characterization of this protein is important for understanding of key cellular processes in bacterial cells. Here we study STY3178, a yfdX protein from a MDR strain of typhoid fever causing Salmonella Typhi. Our experimental results indicate that STY3178 is a helical protein existing in a trimeric oligomerization state in solution. We also observe many small antibiotics, like ciprofloxacin, rifampin and ampicillin viably interact with this protein. The dissociation constants from the quenching of steady state fluorescence and isothermal titration calorimetry show that ciprofloxacin binding is stronger than rifampin followed by ampicillin.

• Authors: Paramita Saha, Camelia Manna, Santasabuj Das, Mahua Ghosh
• Journal: Scientific reports (Sci Rep) Vol. 6 Pg. 21305 (Feb 19 2016) ISSN: 2045-2322 [Electronic] England
• PMID: 26892637 (Publication Type: Journal Article)

Chemical References

• Anti-Bacterial Agents
• Bacterial Proteins
• Protein Aggregates
• Recombinant Proteins

Topics

• Anti-Bacterial Agents (chemistry, metabolism)
• Bacterial Proteins (chemistry, genetics, isolation & purification, metabolism)
• Gene Expression
• Nuclear Magnetic Resonance, Biomolecular
• Protein Aggregates
• Protein Binding
• Recombinant Proteins (chemistry, genetics, isolation & purification, metabolism)
• Salmonella typhi (genetics, metabolism)