Analyzing poppies to make better drugs

A team of researchers from the University of Calgary has uncovered new information about a class of plant enzymes that could have implications for the pharmaceutical industry. In a paper published in the Journal of Biological Chemistry, the scientists explain how they revealed molecular details of an enzyme class that is central to the synthesis of many widely used pharmaceuticals, including the painkillers codeine and morphine.  

The team used the Canadian Light Source at the University of Saskatchewan and the SLAC National Accelerator Laboratory to better understand how the enzyme behaves, which is crucial for unleashing its potential to make novel medicines. “Until this study, we didn’t know the key structural details of the enzyme. We learned from the structure of the enzyme bound to the product how the methylation reaction locks the product into a certain stereochemistry. It was completely unknown how the enzyme did that before we determined this structure,” corresponding author Dr. Kenneth Ng explained.

Stereochemistry is an important concept when it comes to safety and efficacy in drug design. A molecule can have a few different arrangements—similar to how your left hand is a mirror image of your right hand. These arrangements can lead to very different effects.

>Read more on the Canadian Light Source website

Image: group photo of some of the researchers involved with this project. From left to right: Ken Ng (Professor and corresponding author), Jeremy Morris (PhD graduate and second author), Dean Lang (PhD student and first author), and Peter Facchini (Professor, CSO of Willow Biosciences and senior author).