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- PDB-9m4w: Structure of human TRPC5 bound with (-)-englerin A, class 2. -

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Basic information

Entry
Database: PDB / ID: 9m4w
TitleStructure of human TRPC5 bound with (-)-englerin A, class 2.
ComponentsShort transient receptor potential channel 5
KeywordsMEMBRANE PROTEIN / TRPC5 / ion channel / (-)-englerin A
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 / calcium channel complex / positive regulation of neuron differentiation / calcium ion transmembrane transport / calcium channel activity / neuron differentiation / calcium ion transport / nervous system development / presynapse / positive regulation of cytosolic calcium ion concentration / growth cone / ATPase binding / actin 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
: / 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: 2.62 Å
AuthorsChen, Y.K. / Wei, M. / Chen, L.
Funding support China, 2items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2022YFA0806504 China
National Natural Science Foundation of China (NSFC)32225027 China
CitationJournal: Protein Sci / Year: 2025
Title: Mechanism of (-)-Englerin A and calcium binding on the human TRPC5 channel.
Authors: Yikun Chen / Kangcheng Song / Wenjun Guo / Miao Wei / Lei Chen /
Abstract: The natural product (-)-Englerin A (EA) selectively inhibits renal cancer cell growth by potently activating TRPC4 and TRPC5-containing ion channels. However, its binding site on these channels has ...The natural product (-)-Englerin A (EA) selectively inhibits renal cancer cell growth by potently activating TRPC4 and TRPC5-containing ion channels. However, its binding site on these channels has remained elusive. In this study, we present two cryo-EM structures of human TRPC5 in complex with EA at 2.5 and 2.6 Å resolution, which reveal the EA-binding site and identify two major conformations influenced by calcium. EA binds between the pore helix and S5/S6 helices of hTRPC5, forming critical hydrophobic and polar interactions that underscore its specificity. Calcium binding at the intracellular domain of TRPC5 induces structural changes that stabilize the domain in a compact conformation. These findings expand our understanding of the structural pharmacology of TRPC5 and provide a framework for investigating calcium regulation in TRPC channels.
History
DepositionMar 5, 2025Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Jul 2, 2025Provider: 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
B: Short transient receptor potential channel 5
C: Short transient receptor potential channel 5
D: Short transient receptor potential channel 5
hetero molecules


Theoretical massNumber of molelcules
Total (without water)366,84324
Polymers356,8884
Non-polymers9,95520
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 ABCD

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


Mass: 89221.984 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 , 5 types, 20 molecules

#2: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Zn
#3: Chemical
ChemComp-PTY / PHOSPHATIDYLETHANOLAMINE


Mass: 734.039 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C40H80NO8P / Comment: phospholipid*YM
#4: 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 / Comment: phospholipid*YM
#5: Chemical
ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C31H50O4
#6: Chemical
ChemComp-A1L55 / (-)-englerin A


Mass: 442.545 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C26H34O6 / 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: human TRPC5 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 1311

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 2.62 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 109774 / Symmetry type: POINT

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