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- PDB-8slx: Rat TRPV2 bound with 1 CBD ligand in nanodiscs -

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Basic information

Entry
Database: PDB / ID: 8slx
TitleRat TRPV2 bound with 1 CBD ligand in nanodiscs
ComponentsTransient receptor potential cation channel subfamily V member 2
KeywordsMEMBRANE PROTEIN / Transport protein
Function / homology
Function and homology information


growth cone membrane / TRP channels / response to temperature stimulus / positive regulation of calcium ion import / monoatomic cation transmembrane transport / endomembrane system / positive regulation of axon extension / axonal growth cone / monoatomic cation channel activity / calcium channel activity ...growth cone membrane / TRP channels / response to temperature stimulus / positive regulation of calcium ion import / monoatomic cation transmembrane transport / endomembrane system / positive regulation of axon extension / axonal growth cone / monoatomic cation channel activity / calcium channel activity / melanosome / lamellipodium / cell body / positive regulation of cold-induced thermogenesis / axon / negative regulation of cell population proliferation / cell surface / identical protein binding / plasma membrane
Similarity search - Function
Transient receptor potential cation channel subfamily V member 1-4 / Transient receptor potential cation channel subfamily V / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
cannabidiol / Transient receptor potential cation channel subfamily V member 2
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.23 Å
AuthorsTan, X. / Swartz, K.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) United States
CitationJournal: Elife / Year: 2023
Title: Cannabidiol sensitizes TRPV2 channels to activation by 2-APB.
Authors: Aaron Gochman / Xiao-Feng Tan / Chanhyung Bae / Helen Chen / Kenton J Swartz / Andres Jara-Oseguera /
Abstract: The cation-permeable TRPV2 channel is important for cardiac and immune cell function. Cannabidiol (CBD), a non-psychoactive cannabinoid of clinical relevance, is one of the few molecules known to ...The cation-permeable TRPV2 channel is important for cardiac and immune cell function. Cannabidiol (CBD), a non-psychoactive cannabinoid of clinical relevance, is one of the few molecules known to activate TRPV2. Using the patch-clamp technique, we discover that CBD can sensitize current responses of the rat TRPV2 channel to the synthetic agonist 2-aminoethoxydiphenyl borate (2-APB) by over two orders of magnitude, without sensitizing channels to activation by moderate (40°C) heat. Using cryo-EM, we uncover a new small-molecule binding site in the pore domain of rTRPV2 in addition to a nearby CBD site that had already been reported. The TRPV1 and TRPV3 channels are also activated by 2-APB and CBD and share multiple conserved features with TRPV2, but we find that strong sensitization by CBD is only observed in TRPV3, while sensitization for TRPV1 is much weaker. Mutations at non-conserved positions between rTRPV2 and rTRPV1 in either the pore domain or the CBD sites failed to confer strong sensitization by CBD in mutant rTRPV1 channels. Together, our results indicate that CBD-dependent sensitization of rTRPV2 channels engages multiple channel regions, and that the difference in sensitization strength between rTRPV2 and rTRPV1 channels does not originate from amino acid sequence differences at the CBD binding site or the pore domain. The remarkably robust effect of CBD on TRPV2 and TRPV3 channels offers a promising new tool to both understand and overcome one of the major roadblocks in the study of these channels - their resilience to activation.
History
DepositionApr 24, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 31, 2023Provider: repository / Type: Initial release
SupersessionJul 5, 2023ID: 8FX8
Revision 1.1Jul 5, 2023Group: Advisory / Category: pdbx_database_PDB_obs_spr

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Transient receptor potential cation channel subfamily V member 2
B: Transient receptor potential cation channel subfamily V member 2
C: Transient receptor potential cation channel subfamily V member 2
D: Transient receptor potential cation channel subfamily V member 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)348,4769
Polymers347,1964
Non-polymers1,2815
Water724
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Transient receptor potential cation channel subfamily V member 2 / TrpV2 / Osm-9-like TRP channel 2 / OTRPC2 / Stretch-activated channel 2B / Vanilloid receptor-like ...TrpV2 / Osm-9-like TRP channel 2 / OTRPC2 / Stretch-activated channel 2B / Vanilloid receptor-like protein 1 / VRL-1


Mass: 86798.891 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Trpv2, Sac2b, Vrl1 / Cell line (production host): hek / Production host: Homo sapiens (human) / Strain (production host): tsa201 / References: UniProt: Q9WUD2
#2: Chemical
ChemComp-P0T / cannabidiol / (1'R,2'R)-5'-methyl-4-pentyl-2'-(prop-1-en-2-yl)-1',2',3',4'-tetrahydro[1,1'-biphenyl]-2,6-diol / Cannabidiol


Mass: 314.462 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C21H30O2 / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#4: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Trpv2 with CBD ligand / Type: CELL / Entity ID: #1 / Source: NATURAL
Source (natural)Organism: Homo sapiens (human) / Strain: tsa201
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: TUNGSTEN HAIRPIN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 52 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.1_4122: / Classification: refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.23 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 321717 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 93.5 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00218332
ELECTRON MICROSCOPYf_angle_d0.45525016
ELECTRON MICROSCOPYf_dihedral_angle_d12.8266044
ELECTRON MICROSCOPYf_chiral_restr0.0352952
ELECTRON MICROSCOPYf_plane_restr0.0023072

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