8ZFL | pdb_00008zfl

Caenorhabditis elegans ACR-23 in apo state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insights into the molecular effects of the anthelmintics monepantel and betaine on the Caenorhabditis elegans acetylcholine receptor ACR-23.

Liu, F.Li, T.Gong, H.Tian, F.Bai, Y.Wang, H.Yang, C.Li, Y.Guo, F.Liu, S.Chen, Q.

(2024) EMBO J 43: 3787-3806

  • DOI: https://doi.org/10.1038/s44318-024-00165-7
  • Primary Citation of Related Structures:  
    8ZFK, 8ZFL, 8ZFM

  • PubMed Abstract: 

    Anthelmintics are drugs used for controlling pathogenic helminths in animals and plants. The natural compound betaine and the recently developed synthetic compound monepantel are both anthelmintics that target the acetylcholine receptor ACR-23 and its homologs in nematodes. Here, we present cryo-electron microscopy structures of ACR-23 in apo, betaine-bound, and betaine- and monepantel-bound states. We show that ACR-23 forms a homo-pentameric channel, similar to some other pentameric ligand-gated ion channels (pLGICs). While betaine molecules are bound to the classical neurotransmitter sites in the inter-subunit interfaces in the extracellular domain, monepantel molecules are bound to allosteric sites formed in the inter-subunit interfaces in the transmembrane domain of the receptor. Although the pore remains closed in betaine-bound state, monepantel binding results in an open channel by wedging into the cleft between the transmembrane domains of two neighboring subunits, which causes dilation of the ion conduction pore. By combining structural analyses with site-directed mutagenesis, electrophysiology and in vivo locomotion assays, we provide insights into the mechanism of action of the anthelmintics monepantel and betaine.


  • Organizational Affiliation

    Center for Life Sciences, Yunnan Key Laboratory of Cell Metabolism and Diseases, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming, 650091, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Betaine receptor acr-23,Soluble cytochrome b562
A, B, C, D, E
620Caenorhabditis elegansShimwellia blattaeMutation(s): 0 
Gene Names: acr-235E130F59B1.9cybC
Membrane Entity: Yes 
UniProt
Find proteins for G5EG88 (Caenorhabditis elegans)
Explore G5EG88 
Go to UniProtKB:  G5EG88
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0ABE7G5EG88
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
F, G, H, I, J
F, G, H, I, J, K, L, M, N, O
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China32071202
National Natural Science Foundation of China (NSFC)China32100129

Revision History  (Full details and data files)

  • Version 1.0: 2024-07-31
    Type: Initial release
  • Version 1.1: 2024-11-06
    Changes: Data collection, Database references, Structure summary
  • Version 1.2: 2024-11-13
    Changes: Data collection