6S3A

Coxsackie B3 2C protein in complex with S-Fluoxetine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.200 
  • R-Value Observed: 0.185 

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This is version 1.2 of the entry. See complete history


Literature

Fluoxetine targets an allosteric site in the enterovirus 2C AAA+ ATPase and stabilizes a ring-shaped hexameric complex.

Hurdiss, D.L.El Kazzi, P.Bauer, L.Papageorgiou, N.Ferron, F.P.Donselaar, T.van Vliet, A.L.W.Shamorkina, T.M.Snijder, J.Canard, B.Decroly, E.Brancale, A.Zeev-Ben-Mordehai, T.Forster, F.van Kuppeveld, F.J.M.Coutard, B.

(2022) Sci Adv 8: eabj7615-eabj7615

  • DOI: https://doi.org/10.1126/sciadv.abj7615
  • Primary Citation of Related Structures:  
    6S3A, 6T3W

  • PubMed Abstract: 

    Enteroviruses are globally prevalent human pathogens responsible for many diseases. The nonstructural protein 2C is a AAA+ helicase and plays a key role in enterovirus replication. Drug repurposing screens identified 2C-targeting compounds such as fluoxetine and dibucaine, but how they inhibit 2C is unknown. Here, we present a crystal structure of the soluble and monomeric fragment of coxsackievirus B3 2C protein in complex with ( S )-fluoxetine (SFX), revealing an allosteric binding site. To study the functional consequences of SFX binding, we engineered an adenosine triphosphatase (ATPase)–competent, hexameric 2C protein. Using this system, we show that SFX, dibucaine, HBB [2-(α-hydroxybenzyl)-benzimidazole], and guanidine hydrochloride inhibit 2C ATPase activity. Moreover, cryo–electron microscopy analysis demonstrated that SFX and dibucaine lock 2C in a defined hexameric state, rationalizing their mode of inhibition. Collectively, these results provide important insights into 2C inhibition and a robust engineering strategy for structural, functional, and drug-screening analysis of 2C proteins.


  • Organizational Affiliation

    Virology Section, Infectious Diseases and Immunology Division, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, Netherlands.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
2C protein215Coxsackievirus B3Mutation(s): 0 
UniProt
Find proteins for P03313 (Coxsackievirus B3 (strain Nancy))
Explore P03313 
Go to UniProtKB:  P03313
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03313
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.200 
  • R-Value Observed: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.398α = 90
b = 53.183β = 90
c = 79.152γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Commission642434

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-13
    Type: Initial release
  • Version 1.1: 2022-06-01
    Changes: Database references
  • Version 1.2: 2024-06-19
    Changes: Data collection