Small molecule drugs, like the one in the center, can be designed to fit in the drug pocket of the protein receptor.
Courtesy Dr. Andrew Dore, Heptares Therapeutics
This little molecule is what stress looks like.
Researchers from Heptares Therapeutics, a drug company, have discovered the 3-D structure of a protein receptor that mediates our response to stress, according to a new study in Nature. Using a powerful X-ray machine at Diamond Light Source, the UK’s national particle accelerator, they were able to detail the structure of CRF1, a find that they say opens up the possibility of creating specially tailored drugs to treat depression and anxiety.
A vital aspect of the discovery is that the receptor has a small binding pocket located in a much different position than other G-protein-coupled receptors, (GPCRs). Knowing the structure of Class B GPCRs like CRF1 could potentially help researchers develop drugs that better target receptors within the same family, Heptares claims. Scientists could just design a drug that pops right into that pocket.
“The finding that the structure of CRF1, a Class B GPCR, is completely different to previously solved Class A receptors confirms why Class B receptors could not previously be modeled for the purpose of rational drug design,” said Fiona Marshall, Chief Scientific Officer for Heptares, in a press statement. “Now we know its shape, we can design a molecule that will lock into this crevice and block it so that CRF1 becomes inactive–ending the biochemical cascade that ends in stress,” she later told the Sunday Times. The company says it could possibly also lead to targeted drugs for Type 2 diabetes and osteoporosis, since those diseases deal with receptors of the same class and structure.
The discovery is detailed online in Nature this week.
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