Journal: iScience
Article Title: De novo cysteine biosynthesis in Pseudomonas aeruginosa : Characterization of the two main cysteine synthase isoforms
doi: 10.1016/j.isci.2025.114304
Figure Lengend Snippet: Biophysical characterization of PA2706 (black symbols) and PA0932 (red symbols) (A) Far-UV circular dichroism spectra were collected in a 20 mM potassium phosphate buffer, pH 7.0, at 20 °C on solutions containing 4 μM protein (monomer concentration). (B) Near-UV circular dichroism spectra were collected in a 20 mM potassium phosphate buffer, pH 7.0, at 20 °C on solutions containing 60 μM protein (monomer concentration). (C) Oligomeric state determination. Size-exclusion chromatography (SEC) chromatograms obtained from an Agilent AdvanceBio 300 Å column coupled to UV-vis and dual-angle light scattering detectors. The proteins were analyzed at a concentration of 1 mg/mL. Data shown are a representative run of two independent experiments. (D) Thermal denaturation collected at 195 nm on solutions containing 4 μM protein in 20 mM potassium phosphate buffer, pH 7.0. Lines through data points are the fitting to with T m = 60.0 ± 0.1 °C for PA2706 and T m = 74.6 ± 0.2 °C for PA0932. Each value is the average of two independent experiments ± standard deviation.
Article Snippet: Size-exclusion chromatography (SEC) chromatograms obtained from an Agilent AdvanceBio 300 Å column coupled to UV-vis and dual-angle light scattering detectors.
Techniques: Circular Dichroism, Concentration Assay, Size-exclusion Chromatography, Standard Deviation