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- PDB-9vjr: Cryo-EM structure of TRP melastatin channel with icilin -

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Basic information

Entry
Database: PDB / ID: 9vjr
TitleCryo-EM structure of TRP melastatin channel with icilin
ComponentsTransient receptor potential cation channel subfamily M member 8
KeywordsMEMBRANE PROTEIN / TRP
Function / homology
Function and homology information


TRP channels / thermoception / ligand-gated calcium channel activity / response to temperature stimulus / plasma membrane raft / monoatomic ion channel activity / response to cold / calcium ion transmembrane transport / calcium channel activity / intracellular calcium ion homeostasis ...TRP channels / thermoception / ligand-gated calcium channel activity / response to temperature stimulus / plasma membrane raft / monoatomic ion channel activity / response to cold / calcium ion transmembrane transport / calcium channel activity / intracellular calcium ion homeostasis / calcium ion transport / positive regulation of cold-induced thermogenesis / membrane raft / external side of plasma membrane / membrane / identical protein binding / plasma membrane
Similarity search - Function
TRPM, SLOG domain / : / : / SLOG in TRPM / TRPM2-like domain / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
CHOLESTEROL / Icilin / Chem-PIO / Transient receptor potential cation channel subfamily M member 8
Similarity search - Component
Biological speciesMus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsKim, S.-H. / Park, H. / Lee, H.H.
Funding support Korea, Republic Of, 1items
OrganizationGrant numberCountry
Samsung Science and Technology Foundation Korea, Republic Of
CitationJournal: To Be Published
Title: Cryo-EM structure of TRP melastatin channel with icilin
Authors: Kim, S.-H. / Park, H. / Lee, H.H.
History
DepositionJun 21, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 24, 2026Provider: repository / Type: Initial release
Revision 1.0Jun 24, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jun 24, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jun 24, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jun 24, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jun 24, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Transient receptor potential cation channel subfamily M member 8
C: Transient receptor potential cation channel subfamily M member 8
B: Transient receptor potential cation channel subfamily M member 8
D: Transient receptor potential cation channel subfamily M member 8
hetero molecules


Theoretical massNumber of molelcules
Total (without water)523,54720
Polymers517,6084
Non-polymers5,93816
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Transient receptor potential cation channel subfamily M member 8 / Long transient receptor potential channel 6 / LTrpC-6 / LTrpC6 / Transient receptor potential p8 / Trp-p8


Mass: 129402.055 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Trpm8, Ltrpc6, Trpp8 / Production host: Homo sapiens (human) / References: UniProt: Q8R4D5
#2: Chemical
ChemComp-PIO / [(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate / dioctanoyl l-alpha-phosphatidyl-d-myo-inositol 4,5-diphosphate


Mass: 746.566 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C25H49O19P3 / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical
ChemComp-KX7 / Icilin / 3-(2-hydroxyphenyl)-6-(3-nitrophenyl)-3,4-dihydropyrimidin-2(1H)-one


Mass: 311.292 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C16H13N3O4 / Feature type: SUBJECT OF INVESTIGATION / Comment: agonist*YM
#5: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C27H46O / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationY

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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: Transient receptor potential cation channel subfamily M member 8
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Mus musculus (house mouse)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
13cryoSPARC3D reconstruction
CTF correctionType: NONE
3D reconstructionResolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 41143 / Symmetry type: POINT
RefinementHighest resolution: 3.1 Å

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