What exactly is the new BLI instrument?

Biolayer Interferometry (BLI) is a technique for analyzing the rate at which proteins interact with, or bind, their target molecules in real time. The technology involves special sensors called biosensors that are coated with a material that immobilizes the target biomolecules to be tested for their ability to bind the protein of interest.

How does it work?

The target protein is allowed to bind the immobilized biomolecules on the biosensor. Binding causes a change in the amount of reflected light in the biosensor, which is measured by a light detector. This allows us to perform real- time analysis of protein interactions.

What does BLI do differently than other instruments your team uses?

This new technology saves time and is also easier to maintain. BLI performs analysis on samples in a format that allows for rapid screening of binding partners or inhibitors to a target protein. Additionally, BLI is a label-free method so it does not require fluorescent or radioactive tags that can interfere with binding interactions.

What is the benefit of having this instrument at Stowers?

The BLI instrument is very simple to use even for beginners in bioanalytical techniques. As we encourage researchers to incorporate more biochemistry experiments into their research, this simple yet powerful, high throughput instrument provides a good option. Researchers at the Institute study multiple interactions between biomolecules such as protein-protein, protein–DNA, and antibody-antigen. BLI facilitates accurate quantitative measurements of such interactions and their binding properties in real time.

What are some of the most exciting discoveries achieved with this technology?

BLI technology has been available and constantly improving over the past 15 years. It is well established as a powerful bioanalytical tool in the scientific community with over 7,000 publications reporting the use of the technology in a range of applications from protein biochemistry to drug development. At the Stowers Institute, BLI is being used to study the properties of miniature antibodies called nanobodies, how very small proteins (peptides) interact with their targets, and other protein binding interactions.