6UR8

CryoEM structure of human alpha4beta2 nicotinic acetylcholine receptor in complex with varenicline

• PDB DOI: https://doi.org/10.2210/pdb6UR8/pdb
• EM Map EMD-20857: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2019-10-22 Released: 2020-04-29 
• Deposition Author(s): Alvarez, F.J.D., Mukherjee, S., Han, S., Ammirati, M., Kossiakoff, A.A.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.71 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A3B2 Pseudo Symmetry: Cyclic - C5  (Explore in 3D)
Pseudo Stoichiometry: Homo 5-mer - A5 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration, microscopy

Macromolecule Content

• Total Structure Weight: 252.58 kDa 
• Atom Count: 14,880 
• Modelled Residue Count: 1,798 
• Deposited Residue Count: 2,165 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chimera of soluble cytochrome b562 (BRIL) and neuronal acetylcholine receptor subunit alpha-4	A, D	487	Homo sapiens, Escherichia coli	Mutation(s): 0  Gene Names: CHRNA4, NACRA4, cybC Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for P43681 (Homo sapiens) Explore P43681  Go to UniProtKB:  P43681
PHAROS:  P43681 GTEx:  ENSG00000101204
UniProt Groups	P0ABE7P43681

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Neuronal acetylcholine receptor subunit beta-2	B, C, E	397	Homo sapiens	Mutation(s): 0  Gene Names: CHRNB2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P17787 (Homo sapiens) Explore P17787  Go to UniProtKB:  P17787
PHAROS:  P17787 GTEx:  ENSG00000160716

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	F [auth A], H [auth B], I [auth B], K [auth C], L [auth C], N [auth D], P [auth E], Q [auth E]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
QMR (Subject of Investigation/LOI)	G [auth A], O [auth D]	VARENICLINE C13 H13 N3 JQSHBVHOMNKWFT-DTORHVGOSA-N
BMA	J [auth B], M [auth C], R [auth E]	beta-D-mannopyranose C6 H12 O6 WQZGKKKJIJFFOK-RWOPYEJCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.71 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION	3.0-beta
MODEL REFINEMENT	PHENIX	1.16-3549

Structure Validation

Entry History 

Deposition Data

• Released Date: 2020-04-29 
Deposition Author(s): Alvarez, F.J.D., Mukherjee, S., Han, S., Ammirati, M., Kossiakoff, A.A.

Revision History  

• Version 1.0: 2020-04-29
  Type: Initial release
  
• Version 1.1: 2020-05-06
  Changes: Database references
• Version 1.2: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Structure summary