9LN7 | pdb_00009ln7

Alpha-7 nicotinic acetylcholine receptor bound to inhibitory bicyclic peptide KP2007 in a resting state.

• PDB DOI: https://doi.org/10.2210/pdb9LN7/pdb
• EM Map EMD-63228: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, synthetic construct
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-01-20 Released: 2026-01-21 
• Deposition Author(s): Chen, H., Sun, D., Tian, C.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.94 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

De novo discovery of unnatural and potent conotoxin-like bicyclic peptides through a phage-encoded library

Cao, X., Chen, H., Wang, X., Yang, X., Wang, T., Zhou, L., Shi, C., Liu, S., Tian, C., Sun, D.

(2025) Sci China B Chem 68: 4276-4284

• DOI: https://doi.org/10.1007/s11426-024-2543-1

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Hetero 10-mer - A5B5 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 10-mer - A5B1C1D1E1F1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 298.3 kDa 
• Atom Count: 16,940 
• Modeled Residue Count: 2,070 
• Deposited Residue Count: 2,600 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Neuronal acetylcholine receptor subunit alpha-7	A, C, E, G, I	502	Homo sapiens	Mutation(s): 0  Gene Names: CHRNA7, NACHRA7
UniProt & NIH Common Fund Data Resources
Find proteins for P36544 (Homo sapiens) Explore P36544  Go to UniProtKB:  P36544
GTEx:  ENSG00000175344
Glycosylation
Glycosylation Sites: 3		Go to GlyGen: P36544-1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Inhibitory bicyclic peptide KP2007	B, D, F, H, J	18	synthetic construct	Mutation(s): 0

Oligosaccharides

Help  

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	K, L, M, N, O, P, Q, R, S, T	2		N-Glycosylation
Glycosylation Resources
GlyTouCan: G42666HT GlyCosmos: G42666HT GlyGen: G42666HT

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	U [auth A], V [auth C], W [auth E], X [auth G], Y [auth I]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.94 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-01-21 
Deposition Author(s): Chen, H., Sun, D., Tian, C.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	22227810

Revision History  

• Version 1.0: 2026-01-21
  Type: Initial release
  
• Version 1.1: 2026-08-05
  Changes: Data collection, Database references