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TitleStructural mechanisms of TRPV2 modulation by endogenous and exogenous ligands.
Journal, issue, pagesNat Chem Biol, Vol. 19, Issue 1, Page 72-80, Year 2023
Publish dateSep 26, 2022
AuthorsNannan Su / Wenxuan Zhen / Heng Zhang / Lingyi Xu / Yitian Jin / Xiaoying Chen / Cheng Zhao / Qinrui Wang / Xinyan Wang / Shaowei Li / Han Wen / Wei Yang / Jiangtao Guo / Fan Yang /
PubMed AbstractThe transient receptor potential vanilloid 2 (TRPV2) ion channel is a polymodal receptor widely involved in many physiological and pathological processes. Despite many TRPV2 modulators being ...The transient receptor potential vanilloid 2 (TRPV2) ion channel is a polymodal receptor widely involved in many physiological and pathological processes. Despite many TRPV2 modulators being identified, whether and how TRPV2 is regulated by endogenous lipids remains elusive. Here, we report an endogenous cholesterol molecule inside the vanilloid binding pocket (VBP) of TRPV2, with a 'head down, tail up' configuration, resolved at 3.2 Å using cryo-EM. Cholesterol binding antagonizes ligand activation of TRPV2, which is removed from VBP by methyl-β-cyclodextrin (MβCD) as resolved at 2.9 Å. We also observed that estradiol (E2) potentiated TRPV2 activation by 2-aminoethoxydiphenyl borate (2-APB), a classic tool compound for TRP channels. Our cryo-EM structures (resolved at 2.8-3.3 Å) further suggest how E2 disturbed cholesterol binding and how 2-APB bound within the VBP with E2 or without both E2 and endogenous cholesterol, respectively. Therefore, our study has established the structural basis for ligand recognition of the inhibitory endogenous cholesterol and excitatory exogenous 2-APB in TRPV2.
External linksNat Chem Biol / PubMed:36163384
MethodsEM (single particle)
Resolution2.47 - 3.27 Å
Structure data

EMDB-33156, PDB-7xem:
Cholesterol bound state of mTRPV2
Method: EM (single particle) / Resolution: 3.17 Å

EMDB-33157, PDB-7xeo:
MbetaCD treated state of mTRPV2
Method: EM (single particle) / Resolution: 2.89 Å

EMDB-33158, PDB-7xer:
Structure of mTRPV2_Q525T
Method: EM (single particle) / Resolution: 2.47 Å

EMDB-33159, PDB-7xeu:
Structure of mTRPV2_E2
Method: EM (single particle) / Resolution: 2.77 Å

EMDB-33160, PDB-7xev:
Structure of mTRPV2_2-APB
Method: EM (single particle) / Resolution: 3.27 Å

EMDB-33161, PDB-7xew:
Structure of mTRPV2_Q525F
Method: EM (single particle) / Resolution: 2.59 Å

EMDB-33774, PDB-7yep:
2-APB bound state of mTRPV2
Method: EM (single particle) / Resolution: 2.83 Å

Chemicals

ChemComp-CLR:
CHOLESTEROL / Cholesterol

ChemComp-HOH:
WATER / Water

ChemComp-FZ4:
2-aminoethyl diphenylborinate / 2-Aminoethoxydiphenyl borate

Source
  • mus musculus (house mouse)
KeywordsSTRUCTURAL PROTEIN / mTRPV2 / chloesterol / MbetaCD / MEMBRANE PROTEIN / 2-APB

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