Rapid 2,2'-bicinchoninic-based xylanase assay compatible with high throughput screening

Area of Science:

• Biochemistry
• Enzymology
• Analytical Chemistry

Background:

• High-throughput screening (HTS) demands simple, reliable, and quantitative assays.
• Existing methods for reducing sugar analysis may lack efficiency or versatility.
• Enzyme activity assays are crucial for biochemical research and industrial applications.

Purpose of the Study:

• To develop a novel microplate assay for quantitative reducing sugar analysis.
• To adapt the assay for simultaneous protein concentration determination.
• To establish an efficient and sensitive method for detecting endo-beta-D-xylanase activity.

Main Methods:

• Development of a microplate assay utilizing a 2,2'-bicinchoninic acid-based protein reagent.
• Application of the assay for detecting endo-1,4-beta-D-xylanase activity using oat spelt xylan as substrate.
• Validation of assay linearity for sugar concentrations ranging from 0 to 86 microg/ml and protein concentrations from 0 to 143 microg/ml.

Main Results:

• The assay successfully detected endo-1,4-beta-D-xylanase activity between 0.002 and 0.011 IU/ml.
• The assay demonstrated linearity for reducing sugar quantification within the tested range.
• The assay enabled simultaneous quantification of protein concentrations on the same microplate.
• The assay is adaptable to various temperatures and pH conditions, requiring a single detection reagent and heating step.

Conclusions:

• A versatile and sensitive microplate assay for reducing sugar and protein quantification has been established.
• The developed assay is suitable for high-throughput screening of enzyme activity, specifically endo-beta-D-xylanase.
• The assay's simplicity and efficiency offer advantages for biochemical and biotechnological applications.