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Updated: Aug 30, 2025
Structural Biology and Analytical Chemistry Approaches for Characterizing C-Glycoside Metabolic Enzymes in Human Gut Microbiota
Published on: May 23, 2025
Biochemical, structural, and computational studies of a γ-carbonic anhydrase from the pathogenic bacterium
Anna Di Fiore1, Viviana De Luca2, Emma Langella1
1Institute of Biostructures and Bioimaging-CNR, via Pietro Castellino 111, 80131 Napoli, Italy.
Abstract:
Melioidosis is a severe disease caused by the highly pathogenic gram-negative bacterium Burkholderia pseudomallei. Several studies have highlighted the broad resistance of this pathogen to many antibiotics and pointed out the pivotal importance of improving the pharmacological arsenal against it. Since γ-carbonic anhydrases (γ-CAs) have been recently introduced as potential and novel antibacterial drug targets, in this paper, we report a detailed characterization of BpsγCA, a γ-CA from B. pseudomallei by a multidisciplinary approach. In particular, the enzyme was recombinantly produced and biochemically characterized. Its catalytic activity at different pH values was measured, the crystal structure was determined and theoretical pKa calculations were carried out. Results provided a snapshot of the enzyme active site and dissected the role of residues involved in the catalytic mechanism and ligand recognition. These findings are an important starting point for developing new anti-melioidosis drugs targeting BpsγCA.
Insights
Researchers characterized BpsγCA, a novel drug target from Burkholderia pseudomallei, the bacterium causing melioidosis. Understanding this enzyme
Area of Science:
- Microbiology
- Biochemistry
- Structural Biology
Background:
- Melioidosis is a severe disease caused by Burkholderia pseudomallei.
- This bacterium exhibits significant antibiotic resistance, necessitating new therapeutic strategies.
- Gamma-carbonic anhydrases (γ-CAs) are emerging as promising antibacterial drug targets.
Purpose of the Study:
- To perform a detailed multidisciplinary characterization of BpsγCA, a γ-CA from B. pseudomallei.
- To investigate BpsγCA as a potential drug target for combating melioidosis.
Main Methods:
- Recombinant production and biochemical characterization of BpsγCA.
- Measurement of catalytic activity across various pH levels.
- Determination of the crystal structure and theoretical pKa calculations.
Main Results:
- Detailed insights into the enzyme's active site and catalytic mechanism.
- Identification of key residues involved in catalysis and ligand binding.
- Structural and biochemical data provide a foundation for drug development.
Conclusions:
- BpsγCA is a viable and novel target for anti-melioidosis drug development.
- The characterization provides crucial data for designing specific inhibitors.
- This research opens new avenues for therapeutic interventions against B. pseudomallei infections.
