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| Title | Structural insights into the activation of TMEM175 by small molecule. |
|---|---|
| Journal, issue, pages | Neuron, Vol. 113, Issue 21, Page 3567-33581.e9, Year 2025 |
| Publish date | Nov 5, 2025 |
Authors | Xuewu Zhu / Meixuan Ping / Heng Liu / Ting Yu / Zhongwen Jiang / Zhenhua Liu / Chanjing Li / Xinjiao Hou / Qinyu Chu / Shuyao Li / Caiwen Mao / Ting Luo / Chunlan Kang / Feng Wang / Chuanyan Yang / Meiqin Tang / Zhidong Jiang / Zhaobing Gao / Hong Liu / H Eric Xu / Beisha Tang / Xi Cheng / Wanchao Yin / Yu Zhou / Ping Li / ![]() |
| PubMed Abstract | The upregulation of transmembrane protein 175 (TMEM175) has the potential to improve Parkinson's disease (PD) by aiding in the removal of α-synuclein aggregates. Understanding the structural basis ...The upregulation of transmembrane protein 175 (TMEM175) has the potential to improve Parkinson's disease (PD) by aiding in the removal of α-synuclein aggregates. Understanding the structural basis of TMEM175 agonisms is crucial for uncovering its therapeutic potential for PD. Here, we have identified the first cryo-electron microscopy (cryo-EM) structure of human TMEM175 complexes with three agonists: DCY1020, DCY1040, and TUG-891. An open state of TMEM175 is unequivocally captured, laying the groundwork for designing more effective agonists. Further investigations using surface plasmon resonance, systematic mutagenesis, whole-endolysosome patch-clamp techniques, and molecular dynamics simulations consistently revealed that DCY1020/1040 binds at the interface between two subunits, inducing an open conformation further augmented by the synergistic agonist TUG-891. Notably, these agonists facilitate the removal of pathological α-synuclein and restore functions of PD-related TMEM175 variants in neurons. Our findings provide proof of concept that drug discovery targeting TMEM175 can develop agonists capable of effectively reducing pathological α-synuclein levels in PD. |
External links | Neuron / PubMed:40865534 |
| Methods | EM (single particle) |
| Resolution | 2.74 - 3.4 Å |
| Structure data | EMDB-65303, PDB-9vsp: EMDB-65304, PDB-9vsq: EMDB-65305, PDB-9vsr: |
| Chemicals | ![]()
PDB-1etd: Unknown entry ![]() ChemComp-YN9: ![]() ChemComp-CLR: ![]() ChemComp-K: ![]() ChemComp-HOH: ![]() PDB-1ete: |
| Source |
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Keywords | MEMBRANE PROTEIN / TMEM175 / cro-EM / agonist / Parkinson / lysosome / TUG-891 |
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homo sapiens (human)
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