7EKI

human alpha 7 nicotinic acetylcholine receptor in apo-form

• PDB DOI: https://doi.org/10.2210/pdb7EKI/pdb
• EM Map EMD-31168: EMDB EMDataResource

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


• Deposited: 2021-04-05 Released: 2021-05-19 
• Deposition Author(s): Liu, S., Zhao, Y., Sun, D., Tian, C.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.18 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural basis of human alpha 7 nicotinic acetylcholine receptor activation.

Zhao, Y., Liu, S., Zhou, Y., Zhang, M., Chen, H., Eric Xu, H., Sun, D., Liu, L., Tian, C.

(2021) Cell Res 31: 713-716

• PubMed: 33958730 
• DOI: https://doi.org/10.1038/s41422-021-00509-6
• Primary Citation of Related Structures:  
  7EKI, 7EKP, 7EKT

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Organizational Affiliation: 

Hefei National Laboratory of Physical Sciences at Microscale, Anhui Laboratory of Advanced Photonic Science and Technology, and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Homo 5-mer - A5 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 287.69 kDa 
• Atom Count: 16,005 
• Modelled Residue Count: 1,975 
• Deposited Residue Count: 2,510 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Neuronal acetylcholine receptor subunit alpha-7	A, B, C, D, E	502	Homo sapiens	Mutation(s): 0  Gene Names: CHRNA7, NACHRA7 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P36544 (Homo sapiens) Explore P36544  Go to UniProtKB:  P36544
PHAROS:  P36544 GTEx:  ENSG00000175344
Glycosylation
Glycosylation Sites: 2		Go to GlyGen: P36544-1

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	F, G, H, I, J	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR	L [auth A], N [auth B], P [auth C], R [auth D], T [auth E]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N
NAG	K [auth A], M [auth B], O [auth C], Q [auth D], S [auth E]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.18 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2021-05-19 
Deposition Author(s): Liu, S., Zhao, Y., Sun, D., Tian, C.

Revision History  

• Version 1.0: 2021-05-19
  Type: Initial release
  
• Version 1.1: 2021-06-16
  Changes: Database references
• Version 1.2: 2024-10-23
  Changes: Data collection, Database references, Structure summary