8IO3

Cryo-EM structure of human HCN3 channel with cilobradine

• PDB DOI: https://doi.org/10.2210/pdb8IO3/pdb
• EM Map EMD-35606: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Mammalian expression vector EGFP-MCS-pcDNA3.1
• Mutation(s): No 


• Deposited: 2023-03-10 Released: 2024-04-10 
• Deposition Author(s): Yu, B., Lu, Q.Y., Li, J., Zhang, J.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.02 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of human HCN3 channel with cilobradine

Yu, B., Lu, Q.Y., Li, J., Zhang, J.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 346.5 kDa 
• Atom Count: 13,620 
• Modelled Residue Count: 1,728 
• Deposited Residue Count: 3,096 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 3	A [auth C], B [auth A], C [auth B], D	774	Homo sapiens	Mutation(s): 0  Gene Names: HCN3, KIAA1535
UniProt & NIH Common Fund Data Resources
Find proteins for Q9P1Z3 (Homo sapiens) Explore Q9P1Z3  Go to UniProtKB:  Q9P1Z3
PHAROS:  Q9P1Z3 GTEx:  ENSG00000143630

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
VXI (Subject of Investigation/LOI)	E [auth C], F [auth A], G [auth B], H [auth D]	3-[[(3~{S})-1-[2-(3,4-dimethoxyphenyl)ethyl]piperidin-3-yl]methyl]-7,8-dimethoxy-2,5-dihydro-1~{H}-3-benzazepin-4-one C28 H38 N2 O5 OBUFMJDDZTXJPY-NRFANRHFSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.02 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-04-10 
Deposition Author(s): Yu, B., Lu, Q.Y., Li, J., Zhang, J.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2024-04-10
  Type: Initial release