24VX | pdb_000024vx

Cryo-EM structure of the human KCNQ2/KCNQ3 heterotetramer (3:1 stoichiometry) with CLM142 and PIP2 in open state (M2223 open, with symmetry expansion)

PDB DOI: https://doi.org/10.2210/pdb24VX/pdb
EM Map EMD-69855: EMDB EMDataResource

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

Deposited: 2026-03-22 Released: 2026-08-12
Deposition Author(s): Wang, Y.F., Yang, H., Qu, Y.N., Shen, H.Z.
Funding Organization(s): Ministry of Science and Technology (MoST, China)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 4.07 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 24VX

This is version 1.0 of the entry. See complete history.

Literature

Structural basis for heteromeric assembly and subthreshold activation of human M-channel

Wang, Y., Yang, H., Qu, Y., Li, J., Li, X., Hou, W., Wu, K., Xie, G., Wang, X., Ye, Y., Yang, H., Shen, H.

(2026) Vita

DOI: https://doi.org/10.15302/vita.2026.05.0032

Macromolecule Content

Total Structure Weight: 328.58 kDa
Atom Count: 7,857
Modeled Residue Count: 938
Deposited Residue Count: 2,879
Unique protein chains: 2

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium voltage-gated channel subfamily KQT member 3	A	620	Homo sapiens	Mutation(s): 0 Gene Names: KCNQ3
UniProt & NIH Common Fund Data Resources
Find proteins for O43525 (Homo sapiens) Explore O43525 Go to UniProtKB: O43525
PHAROS: O43525 GTEx: ENSG00000184156
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	O43525
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Green fluorescent protein,Potassium voltage-gated channel subfamily KQT member 2	B, C, D	753	Aequorea victoria, Homo sapiens	Mutation(s): 0 Gene Names: GFP, KCNQ2
UniProt & NIH Common Fund Data Resources
Find proteins for P42212 (Aequorea victoria) Explore P42212 Go to UniProtKB: P42212
Find proteins for O43526 (Homo sapiens) Explore O43526 Go to UniProtKB: O43526
PHAROS: O43526 GTEx: ENSG00000075043
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Groups	P42212 O43526
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PIO (Subject of Investigation/LOI) Query on PIO Download:Ideal Coordinates CCD File SDF format, chain H [auth C] SDF format, chain K [auth D] SDF format, chain F [auth B] MOL2 format, chain H [auth C] MOL2 format, chain K [auth D] MOL2 format, chain F [auth B] mmCIF format, chain H [auth C] mmCIF format, chain K [auth D] mmCIF format, chain F [auth B]	F [auth B], H [auth C], K [auth D]	[(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 C₂₅ H₄₉ O₁₉ P₃ XLNCEHRXXWQMPK-MJUMVPIBSA-N		Interactions Focus chain F [auth B] Focus chain H [auth C] Focus chain K [auth D] Interactions & Density Focus chain F [auth B] Focus chain H [auth C] Focus chain K [auth D]
A1E7E Query on A1E7E Download:Ideal Coordinates CCD File SDF format, chain I [auth C] SDF format, chain J [auth D] SDF format, chain G [auth B] SDF format, chain E [auth A] MOL2 format, chain I [auth C] MOL2 format, chain J [auth D] MOL2 format, chain G [auth B] MOL2 format, chain E [auth A] mmCIF format, chain I [auth C] mmCIF format, chain J [auth D] mmCIF format, chain G [auth B] mmCIF format, chain E [auth A]	E [auth A], G [auth B], I [auth C], J [auth D]	~{N}-(7-cyclopropyl-1-prop-2-ynyl-indazol-3-yl)-4-fluoranyl-benzamide C₂₀ H₁₆ F N₃ O AERBNZCRDPIGNB-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain G [auth B] Focus chain I [auth C] Focus chain J [auth D] Interactions & Density Focus chain E [auth A] Focus chain G [auth B] Focus chain I [auth C] Focus chain J [auth D]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 4.07 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
RECONSTRUCTION	PHENIX

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-08-12

Deposition Author(s):

Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	--

Revision History (Full details and data files)

Version 1.0: 2026-08-12
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.