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-Structure paper
| Title | Mechanisms of transport and analgesic compounds recognition by glycine transporter 2. |
|---|---|
| Journal, issue, pages | Proc Natl Acad Sci U S A, Vol. 122, Issue 48, Page e2506722122, Year 2025 |
| Publish date | Dec 2, 2025 |
Authors | Yuhang Wang / Jiawei Su / Jun Zhao / Renjie Li / Qinru Bai / Hongyi Song / Yufei Meng / Qiao Ma / Yan Zhao / ![]() |
| PubMed Abstract | Glycine transporter 2 (GlyT2) regulates inhibitory glycinergic neurotransmission, and its inhibition potentiates glycinergic signaling, which is a promising strategy for managing neuropathic pain. ...Glycine transporter 2 (GlyT2) regulates inhibitory glycinergic neurotransmission, and its inhibition potentiates glycinergic signaling, which is a promising strategy for managing neuropathic pain. This study presents high-resolution structures of GlyT2 in its apo state and in complexes with the substrate glycine, analgesic inhibitors, captured in three functional states: outward-facing, occluded, and inward-facing. The glycine-bound structure reveals the binding mode of the substrate, Na and Cl. Specifically, we identified the Na3 binding site, offering fundamental insights into Na/Cl coupled substrate binding and conformational changes. Moreover, we clearly elucidate a previously unseen allosteric binding pocket for the lipid-based oleoyl-D-lysine, which acts as a wedge to stabilize GlyT2 in the outward-facing conformation and prevents its transition. Furthermore, the complex structures with small compounds ALX1393, opiranserin, and ORG25543 reveal their competitive and allosteric inhibition mechanisms. Overall, our study provides a solid foundation for understanding glycine reuptake mechanisms and developing effective and safer analgesic agents. |
External links | Proc Natl Acad Sci U S A / PubMed:41284875 / PubMed Central |
| Methods | EM (single particle) |
| Resolution | 2.8 - 3.8 Å |
| Structure data | EMDB-62420, PDB-9km2: EMDB-62421, PDB-9km3: EMDB-62422, PDB-9km4: EMDB-62423, PDB-9km5: EMDB-62424, PDB-9km7: EMDB-62425, PDB-9km8: |
| Chemicals | ![]() ChemComp-CLR: ![]() ChemComp-GLY: ![]() ChemComp-NA: ![]() ChemComp-CL: ![]() ChemComp-HOH: ![]() ChemComp-DLY: ![]() ChemComp-OLA: ![]() PDB-1ez0: ![]() PDB-1ef1: ![]() PDB-1ef3: |
| Source |
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Keywords | MEMBRANE PROTEIN / GLYT2; PROTEIN STRUCTURE |
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