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- PDB-9lzz: Cryo-EM structure of homomeric TRPC channel with agonists, class 2 -

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Basic information

Entry
Database: PDB / ID: 9lzz
TitleCryo-EM structure of homomeric TRPC channel with agonists, class 2
ComponentsShort transient receptor potential channel 5
KeywordsMEMBRANE PROTEIN / TRP
Function / homology
Function and homology information


regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / inositol 1,4,5 trisphosphate binding / cation channel complex / actinin binding / clathrin binding / TRP channels ...regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / inositol 1,4,5 trisphosphate binding / cation channel complex / actinin binding / clathrin binding / TRP channels / regulation of cytosolic calcium ion concentration / positive regulation of axon extension / positive regulation of neuron differentiation / calcium channel complex / calcium ion transmembrane transport / calcium channel activity / neuron differentiation / calcium ion transport / nervous system development / presynapse / actin binding / growth cone / positive regulation of cytosolic calcium ion concentration / ATPase binding / neuron apoptotic process / neuronal cell body / positive regulation of cell population proliferation / dendrite / plasma membrane
Similarity search - Function
Transient receptor potential channel, canonical 5 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / Ankyrin repeat / Ankyrin repeats (3 copies) / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily ...Transient receptor potential channel, canonical 5 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / Ankyrin repeat / Ankyrin repeats (3 copies) / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
6-(trifluoromethoxy)-1,3-benzothiazol-2-amine / : / Chem-POV / PHOSPHATIDYLETHANOLAMINE / CHOLESTEROL HEMISUCCINATE / Short transient receptor potential channel 5
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.03 Å
AuthorsPark, H. / Kim, S.-H. / Lee, H.H.
Funding support Korea, Republic Of, 1items
OrganizationGrant numberCountry
Samsung Science and Technology Foundation Korea, Republic Of
CitationJournal: Nat Commun / Year: 2025
Title: Molecular architecture of the human TRPC1/C5 heteromeric channel.
Authors: Sun-Hong Kim / Hyunwoo Park / Jinhyeong Kim / Hana Kang / Jongdae Won / Byoung-Cheol Lee / Insuk So / Hyung Ho Lee /
Abstract: Transient receptor potential (TRP) ion channels form heteromers through combinatorial associations of distinct subunits, contributing to the diversity of TRP channel functions. Among them, TRPC5, ...Transient receptor potential (TRP) ion channels form heteromers through combinatorial associations of distinct subunits, contributing to the diversity of TRP channel functions. Among them, TRPC5, which forms a heteromer with TRPC1, represents an attractive pharmaceutical target for treating anxiety and depression. Here, we present the cryo-electron microscopy structure of the human TRPC1/C5 heteromer, composed of one TRPC1 subunit and three TRPC5 subunits. The incorporation of TRPC1 into the heteromer disrupts the C symmetry of the TRPC5 homotetramer, resulting in a distinct ion conduction pathway characterized by an asymmetrically constricted selectivity filter and an asymmetric lower gate. The TRPC1/C5 heteromer displays recognizable structural features compared to the TRPC1/C4 heteromer, including a noncanonically tilted coiled-coil domain and a distinct intersubunit interactions. Furthermore, we elucidate the structures of human TRPC5 bound to the TRPC1/4/5-specific agonist, (-)-Englerin A. Our findings establish a foundation for exploring the diversity of heteromeric TRP channels and pave the way for targeting TRPC1/C5 as a therapeutic strategy.
History
DepositionFeb 22, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 21, 2026Provider: repository / Type: Initial release
Revision 1.0Jan 21, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jan 21, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jan 21, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jan 21, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 21, 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: Short transient receptor potential channel 5
D: Short transient receptor potential channel 5
C: Short transient receptor potential channel 5
B: Short transient receptor potential channel 5
hetero molecules


Theoretical massNumber of molelcules
Total (without water)370,86032
Polymers359,8084
Non-polymers11,05228
Water00
1


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

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Components

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Protein , 1 types, 4 molecules ADCB

#1: Protein
Short transient receptor potential channel 5 / TrpC5 / Transient receptor protein 5 / TRP-5 / hTRP-5 / hTRP5


Mass: 89951.891 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TRPC5, TRP5 / Production host: Homo sapiens (human) / References: UniProt: Q9UL62

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Non-polymers , 7 types, 28 molecules

#2: Chemical
ChemComp-PTY / PHOSPHATIDYLETHANOLAMINE


Mass: 734.039 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C40H80NO8P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM
#3: Chemical
ChemComp-POV / (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / POPC


Mass: 760.076 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C42H82NO8P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM
#4: Chemical
ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C31H50O4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#7: Chemical
ChemComp-A1L55 / (-)-englerin A


Mass: 442.545 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C26H34O6
#8: Chemical
ChemComp-657 / 6-(trifluoromethoxy)-1,3-benzothiazol-2-amine / Riluzole


Mass: 234.198 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C8H5F3N2OS / Feature type: SUBJECT OF INVESTIGATION

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Details

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: Cryo-EM structure of homomeric TRPC channel with agonists, class 2
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
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: 44.3 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.03 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 22419 / Symmetry type: POINT
RefinementHighest resolution: 3.03 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00246216
ELECTRON MICROSCOPYf_angle_d0.54783716
ELECTRON MICROSCOPYf_dihedral_angle_d9.4787892
ELECTRON MICROSCOPYf_chiral_restr0.0353540
ELECTRON MICROSCOPYf_plane_restr0.0026480

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