Structural insights into the inhibition of glycine reuptake

Azadeh Shahsavar, Peter Stohler, Gleb Bourenkov, Iwan Zimmermann, Martin Siegrist, Wolfgang Guba, Emmanuel Pinard, Steffen Sinning, Markus A. Seeger, Thomas R. Schneider*, Roger J. P. Dawson*, Poul Nissen*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

The human glycine transporter 1 (GlyT1) regulates glycine-mediated neuronal excitation and inhibition through the sodium- and chloride-dependent reuptake of glycine1,2,3. Inhibition of GlyT1 prolongs neurotransmitter signalling, and has long been a key strategy in the development of therapies for a broad range of disorders of the central nervous system, including schizophrenia and cognitive impairments4. Here, using a synthetic single-domain antibody (sybody) and serial synchrotron crystallography, we have determined the structure of GlyT1 in complex with a benzoylpiperazine chemotype inhibitor at 3.4 Å resolution. We find that the inhibitor locks GlyT1 in an inward-open conformation and binds at the intracellular gate of the release pathway, overlapping with the glycine-release site. The inhibitor is likely to reach GlyT1 from the cytoplasmic leaflet of the plasma membrane. Our results define the mechanism of inhibition and enable the rational design of new, clinically efficacious GlyT1 inhibitors.
Original languageEnglish
JournalNature
Volume591
Issue7851
Pages (from-to)677-681
Number of pages5
ISSN1476-4687
DOIs
Publication statusPublished - Mar 2021

Cite this