9RRQ | pdb_00009rrq

Human TRPC5 in complex with (-) englerin A, partial occupancy (2EA:2LIP stoichiometry) state 1

PDB DOI: https://doi.org/10.2210/pdb9RRQ/pdb
EM Map EMD-54193: EMDB EMDataResource

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

Deposited: 2025-06-27 Released: 2026-05-13
Deposition Author(s): Porav, A.S., Bon, R.S., Muench, S.
Funding Organization(s): Biotechnology and Biological Sciences Research Council (BBSRC)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.90 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

Starting Model: in silico
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wwPDB Validation 3D Report Full Report

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

Literature

(-)-Englerin A binding to human TRPC5 exposes an aromatic interaction network in channel activation.

Porav, S.A., Ptakova, A., Bauer, C.C., Hammond, K.L.R., Beech, D.J., Vlachova, V., Muench, S.P., Bon, R.S.

(2026) Nat Commun 17

PubMed: 42056091 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1038/s41467-026-71840-y
Primary Citation Related Structures:
9RRF, 9RRM, 9RRN, 9RRO, 9RRQ, 9RRU, 9RSG, 9RSH, 9RVV

PubMed Abstract:
TRPC4/5 cation channels are polymodal cellular sensors and emerging drug targets in various human pathologies. The plant natural product (-)-englerin A (EA) is a potent, selective TRPC4/5 agonist that has transformed TRPC4/5 research. However, the structural basis of EA-mediated TRPC4/5 activation has remained elusive, limiting our ability to understand and exploit EA's pharmacology. Here, we present nine high-resolution cryo-EM structures of human TRPC5, representing different states and ligand occupancies, which show that EA occupies a conserved lipid binding site between channel subunits. Conformational changes of residues surrounding this binding site - most notably in the aromatic interaction network around Phe520 - result in rearrangement of the pore helices into a pre-open state. Our structural models are consistent with the effects of mutagenesis on EA's potency, efficacy and activation kinetics, and allow us to rationalise competitive inhibition by other TRPC4/5 modulators as well as EA's selectivity profile within the TRPC family. Our structural insights into the mode-of-action of a widely used TRPC4/5 agonist will underpin fundamental TRPC4/5 research and ongoing drug discovery programmes.

Organizational Affiliation

Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, Leeds, UK. s.porav@leeds.ac.uk.

Macromolecule Content

Total Structure Weight: 363.42 kDa
Atom Count: 22,835
Modeled Residue Count: 2,741
Deposited Residue Count: 3,060
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Short transient receptor potential channel 5	A, B [auth C], C [auth B], D	765	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% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q9UL62
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PTY Query on PTY Download:Ideal Coordinates CCD File SDF format, chain K [auth C] SDF format, chain V [auth D] SDF format, chain Q [auth B] SDF format, chain F [auth A] MOL2 format, chain K [auth C] MOL2 format, chain V [auth D] MOL2 format, chain Q [auth B] MOL2 format, chain F [auth A] mmCIF format, chain K [auth C] mmCIF format, chain V [auth D] mmCIF format, chain Q [auth B] mmCIF format, chain F [auth A]	F [auth A], K [auth C], Q [auth B], V [auth D]	PHOSPHATIDYLETHANOLAMINE C₄₀ H₈₀ N O₈ P NJGIRBISCGPRPF-KXQOOQHDSA-N		Interactions Focus chain F [auth A] Focus chain K [auth C] Focus chain Q [auth B] Focus chain V [auth D] Interactions & Density Focus chain F [auth A] Focus chain K [auth C] Focus chain Q [auth B] Focus chain V [auth D]
YZY Query on YZY Download:Ideal Coordinates CCD File SDF format, chain T [auth D] SDF format, chain O [auth B] MOL2 format, chain T [auth D] MOL2 format, chain O [auth B] mmCIF format, chain T [auth D] mmCIF format, chain O [auth B]	O [auth B], T [auth D]	(2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate C₃₇ H₇₀ O₅ DOZKMFVMCATMEH-OZKTZCCCSA-N		Interactions Focus chain O [auth B] Focus chain T [auth D] Interactions & Density Focus chain O [auth B] Focus chain T [auth D]
Y01 Query on Y01 Download:Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain L [auth C] SDF format, chain R [auth B] SDF format, chain W [auth D] MOL2 format, chain G [auth A] MOL2 format, chain L [auth C] MOL2 format, chain R [auth B] MOL2 format, chain W [auth D] mmCIF format, chain G [auth A] mmCIF format, chain L [auth C] mmCIF format, chain R [auth B] mmCIF format, chain W [auth D]	G [auth A], L [auth C], R [auth B], W [auth D]	CHOLESTEROL HEMISUCCINATE C₃₁ H₅₀ O₄ WLNARFZDISHUGS-MIXBDBMTSA-N		Interactions Focus chain G [auth A] Focus chain L [auth C] Focus chain R [auth B] Focus chain W [auth D] Interactions & Density Focus chain G [auth A] Focus chain L [auth C] Focus chain R [auth B] Focus chain W [auth D]
A1L55 (Subject of Investigation/LOI) Query on A1L55 Download:Ideal Coordinates CCD File SDF format, chain M [auth C] SDF format, chain H [auth A] MOL2 format, chain M [auth C] MOL2 format, chain H [auth A] mmCIF format, chain M [auth C] mmCIF format, chain H [auth A]	H [auth A], M [auth C]	(-)-englerin A C₂₆ H₃₄ O₆ GACOFEKSDCOVMV-RRYXBOBMSA-N		Interactions Focus chain H [auth A] Focus chain M [auth C] Interactions & Density Focus chain H [auth A] Focus chain M [auth C]
ZN Query on ZN Download:Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain N [auth C] SDF format, chain X [auth D] SDF format, chain S [auth B] MOL2 format, chain I [auth A] MOL2 format, chain N [auth C] MOL2 format, chain X [auth D] MOL2 format, chain S [auth B] mmCIF format, chain I [auth A] mmCIF format, chain N [auth C] mmCIF format, chain X [auth D] mmCIF format, chain S [auth B]	I [auth A], N [auth C], S [auth B], X [auth D]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Focus chain N [auth C] Focus chain S [auth B] Focus chain X [auth D] Interactions & Density Focus chain I [auth A] Focus chain N [auth C] Focus chain S [auth B] Focus chain X [auth D]
CA Query on CA Download:Ideal Coordinates CCD File SDF format, chain U [auth D] SDF format, chain P [auth B] SDF format, chain J [auth C] SDF format, chain E [auth A] MOL2 format, chain U [auth D] MOL2 format, chain P [auth B] MOL2 format, chain J [auth C] MOL2 format, chain E [auth A] mmCIF format, chain U [auth D] mmCIF format, chain P [auth B] mmCIF format, chain J [auth C] mmCIF format, chain E [auth A]	E [auth A], J [auth C], P [auth B], U [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain J [auth C] Focus chain P [auth B] Focus chain U [auth D] Interactions & Density Focus chain E [auth A] Focus chain J [auth C] Focus chain P [auth B] Focus chain U [auth D]