Analysis of serine protease by Differential Scanning Fluorimetry(DSF) (CAT#: STEM-MB-0809-WXH)
Introduction
Serine proteases (or serine endopeptidases) are enzymes that cleave peptide bonds in proteins. Serine serves as the nucleophilic amino acid at the (enzyme's) active site. They are found ubiquitously in both eukaryotes and prokaryotes.
Differential Scanning Fluorimetry measures protein thermal unfolding by monitoring changes in fluorescence emission of a sample upon heating. This allows the determination of protein thermostability and complex formation even with weakly binding ligands by thermal shift assay. Differential Scanning Fluorimetry is therefore ideally suited for screening of optimum buffer conditions like pH, buffer composition and ionic strength. The technique is applicable to any biological sample, from soluble proteins to integral membrane proteins.
Applications
To identify low-molecular-weight ligands that bind and stabilize purified proteins. To measure the denaturation and unfolding of proteins.
Procedure
1. Preparation of compound solutions 2. Preparation of buffer/additive screen plates 3. Preparation of compound storage plates 4. Equipment preparation 5. Sample preparation 63. Performing the scan