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Analysis Biomolecular Interactions of hACE2 peptidase with BANAL-52/103 and BANAL-236 by BLI (CAT#: STEM-MB-0153-CJ)

Introduction

SARS-CoV-2-related viruses the closest SARS-CoV-2 bat-borne genome still remains the one from R. affinis, RaTG13, with 96.1% identity at the whole-genome level. Since its appearance in humans, SARS-CoV-2 has evolved through sporadic mutations and recombination events14, some of which correspond to gains in fitness allowing the virus to spread more widely, or to escape neutralizing antibodies. The spike sequence seems essential, as it determines the binding affinity and accessibility of the receptor-binding domain (RBD) to the cellular ACE2 receptor and is therefore responsible for host range. And the SARS-CoV-2 RBD binds to R. macrotis ACE2 with a lower affinity than to hACE2 .




Principle

Bio-Layer Interferometry (BLI) is an optical technique for measuring macromolecular interactions by analyzing interference patterns of white light reflected from the surface of a biosensor tip. BLI experiments are used to determine the kinetics and affinity of molecular interactions. In a BLI experiment, one molecule is immobilized to a Dip and Read Biosensor and binding to a second molecule is measured. A change in the number of molecules bound to the end of the biosensor tip causes a shift in the interference pattern that is measured in real-time.

Applications

Immunology/Inflammation; Virology; Pharmacology

Procedure

1. Detect Buffers and prepare samples. BLI experiments are set up with one molecule immobilised on the surface of the biosensor (load sample) and a second molecule in solution (the analytical sample).
2. Fix the load sample on the biocompatible biosensor while the analytical sample is in solution.
3. The biosensor tip is immersed in the solution so that the target molecule begins to bind to the analysis sample.
4. Set up and run the BLI experiment. Molecules bound to or dissociated from the biosensor can generate response curves on the BLI system; unbound molecules, changes in the refractive index of the surrounding medium or changes in flow rate do not affect the interferogram pattern.
5. Collect and analyse data on the BLI's system.

Materials

• Equipment: Fortebio Bio-Layer Interferometry (BLI)
• Sample Type: DNA, RNA, Protein, Antibodies, Peptides, Small Molecules