5KWB

Crystal Structure of the Receptor Binding Domain of the Spike Glycoprotein of Human Betacoronavirus HKU1 (HKU1 1A-CTD, 1.9 angstrom, molecular replacement)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 

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This is version 2.0 of the entry. See complete history


Literature

Crystal structure of the receptor binding domain of the spike glycoprotein of human betacoronavirus HKU1

Ou, X.Guan, H.Qin, B.Mu, Z.Wojdyla, J.A.Wang, M.Dominguez, S.R.Qian, Z.Cui, S.

(2017) Nat Commun 8: 15216-15216

  • DOI: 10.1038/ncomms15216
  • Primary Citation of Related Structures:  
    5KWB, 5GNB

  • PubMed Abstract: 
  • Human coronavirus (CoV) HKU1 is a pathogen causing acute respiratory illnesses and so far little is known about its biology. HKU1 virus uses its S1 subunit C-terminal domain (CTD) and not the N-terminal domain like other lineage A β-CoVs to bind to its yet unknown human receptor ...

    Human coronavirus (CoV) HKU1 is a pathogen causing acute respiratory illnesses and so far little is known about its biology. HKU1 virus uses its S1 subunit C-terminal domain (CTD) and not the N-terminal domain like other lineage A β-CoVs to bind to its yet unknown human receptor. Here we present the crystal structure of HKU1 CTD at 1.9 Å resolution. The structure consists of three subdomains: core, insertion and subdomain-1 (SD-1). While the structure of the core and SD-1 subdomains of HKU1 are highly similar to those of other β-CoVs, the insertion subdomain adopts a novel fold, which is largely invisible in the cryo-EM structure of the HKU1 S trimer. We identify five residues in the insertion subdomain that are critical for binding of neutralizing antibodies and two residues essential for receptor binding. Our study contributes to a better understanding of entry, immunity and evolution of CoV S proteins.


    Organizational Affiliation

    MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Spike glycoproteinA371Human coronavirus HKU1 (isolate N1)Mutation(s): 0 
Gene Names: S3
UniProt
Find proteins for Q5MQD0 (Human coronavirus HKU1 (isolate N1))
Explore Q5MQD0 
Go to UniProtKB:  Q5MQD0
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-fructofuranose-(2-1)-alpha-D-glucopyranoseB2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G05551OP
GlyCosmos:  G05551OP
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900003
Query on PRD_900003
BsucroseOligosaccharide /  Nutrient Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.556α = 90
b = 183.8β = 90
c = 63.342γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata processing
Cootmodel building
PHASERphasing

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-07
    Type: Initial release
  • Version 1.1: 2017-06-14
    Changes: Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary