SLC-mediated transport of neurotransmitters / glycine:sodium symporter activity / synaptic transmission, glycinergic / glycine import across plasma membrane / sodium ion transmembrane transport / synapse / metal ion binding / plasma membrane 類似検索 - 分子機能
Sodium:neurotransmitter symporter family signature 2. / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile. 類似検索 - ドメイン・相同性
ジャーナル: Proc Natl Acad Sci U S A / 年: 2025 タイトル: Mechanisms of transport and analgesic compounds recognition by glycine transporter 2. 著者: Yuhang Wang / Jiawei Su / Jun Zhao / Renjie Li / Qinru Bai / Hongyi Song / Yufei Meng / Qiao Ma / Yan Zhao / 要旨: 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.