9M4W | pdb_00009m4w

Structure of human TRPC5 bound with (-)-englerin A, class 2.

PDB DOI: https://doi.org/10.2210/pdb9M4W/pdb
EM Map EMD-63631: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Homo sapiens
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2025-03-05 Released: 2025-07-02
Deposition Author(s): Chen, Y.K., Wei, M., Chen, L.
Funding Organization(s): Ministry of Science and Technology (MoST, China), National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.62 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Mechanism of (-)-Englerin A and calcium binding on the human TRPC5 channel.

Chen, Y., Song, K., Guo, W., Wei, M., Chen, L.

(2025) Protein Sci 34: e70218-e70218

PubMed: 40671342 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1002/pro.70218
Primary Citation of Related Structures:
9M36, 9M4W, 9M5V

PubMed 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 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.

Organizational Affiliation

State Key Laboratory of Membrane Biology, College of Future Technology, Institute of Molecular Medicine, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing, China.

Macromolecule Content

Total Structure Weight: 366.84 kDa
Atom Count: 22,180
Modeled Residue Count: 2,648
Deposited Residue Count: 3,068
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Short transient receptor potential channel 5	A, B, C, D	767	Homo sapiens	Mutation(s): 0 Gene Names: TRPC5, TRP5
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UL62 (Homo sapiens) Explore Q9UL62 Go to UniProtKB: Q9UL62
PHAROS: Q9UL62 GTEx: ENSG00000072315
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q9UL62
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
POV Query on POV Download Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain L [auth B] SDF format, chain Q [auth C] SDF format, chain V [auth D] MOL2 format, chain G [auth A] MOL2 format, chain L [auth B] MOL2 format, chain Q [auth C] MOL2 format, chain V [auth D] mmCIF format, chain G [auth A] mmCIF format, chain L [auth B] mmCIF format, chain Q [auth C] mmCIF format, chain V [auth D]	G [auth A], L [auth B], Q [auth C], V [auth D]	(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate C₄₂ H₈₂ N O₈ P WTJKGGKOPKCXLL-PFDVCBLKSA-N		Interactions Focus chain G [auth A] Focus chain L [auth B] Focus chain Q [auth C] Focus chain V [auth D] Interactions & Density Focus chain G [auth A] Focus chain L [auth B] Focus chain Q [auth C] Focus chain V [auth D]
PTY Query on PTY Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain K [auth B] SDF format, chain P [auth C] SDF format, chain U [auth D] MOL2 format, chain F [auth A] MOL2 format, chain K [auth B] MOL2 format, chain P [auth C] MOL2 format, chain U [auth D] mmCIF format, chain F [auth A] mmCIF format, chain K [auth B] mmCIF format, chain P [auth C] mmCIF format, chain U [auth D]	F [auth A], K [auth B], P [auth C], U [auth D]	PHOSPHATIDYLETHANOLAMINE C₄₀ H₈₀ N O₈ P NJGIRBISCGPRPF-KXQOOQHDSA-N		Interactions Focus chain F [auth A] Focus chain K [auth B] Focus chain P [auth C] Focus chain U [auth D] Interactions & Density Focus chain F [auth A] Focus chain K [auth B] Focus chain P [auth C] Focus chain U [auth D]
Y01 Query on Y01 Download Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain M [auth B] SDF format, chain R [auth C] SDF format, chain W [auth D] MOL2 format, chain H [auth A] MOL2 format, chain M [auth B] MOL2 format, chain R [auth C] MOL2 format, chain W [auth D] mmCIF format, chain H [auth A] mmCIF format, chain M [auth B] mmCIF format, chain R [auth C] mmCIF format, chain W [auth D]	H [auth A], M [auth B], R [auth C], W [auth D]	CHOLESTEROL HEMISUCCINATE C₃₁ H₅₀ O₄ WLNARFZDISHUGS-MIXBDBMTSA-N		Interactions Focus chain H [auth A] Focus chain M [auth B] Focus chain R [auth C] Focus chain W [auth D] Interactions & Density Focus chain H [auth A] Focus chain M [auth B] Focus chain R [auth C] Focus chain W [auth D]
A1L55 (Subject of Investigation/LOI) Query on A1L55 Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain S [auth C] SDF format, chain X [auth D] SDF format, chain N [auth B] MOL2 format, chain I [auth A] MOL2 format, chain S [auth C] MOL2 format, chain X [auth D] MOL2 format, chain N [auth B] mmCIF format, chain I [auth A] mmCIF format, chain S [auth C] mmCIF format, chain X [auth D] mmCIF format, chain N [auth B]	I [auth A], N [auth B], S [auth C], X [auth D]	(-)-englerin A C₂₆ H₃₄ O₆ GACOFEKSDCOVMV-RRYXBOBMSA-N		Interactions Focus chain I [auth A] Focus chain N [auth B] Focus chain S [auth C] Focus chain X [auth D] Interactions & Density Focus chain I [auth A] Focus chain N [auth B] Focus chain S [auth C] Focus chain X [auth D]
ZN Query on ZN Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain J [auth B] SDF format, chain O [auth C] SDF format, chain T [auth D] MOL2 format, chain E [auth A] MOL2 format, chain J [auth B] MOL2 format, chain O [auth C] MOL2 format, chain T [auth D] mmCIF format, chain E [auth A] mmCIF format, chain J [auth B] mmCIF format, chain O [auth C] mmCIF format, chain T [auth D]	E [auth A], J [auth B], O [auth C], T [auth D]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain J [auth B] Focus chain O [auth C] Focus chain T [auth D] Interactions & Density Focus chain E [auth A] Focus chain J [auth B] Focus chain O [auth C] Focus chain T [auth D]