3SCJ

Crystal structure of spike protein receptor-binding domain from a predicted SARS coronavirus civet strain complexed with human receptor ACE2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanisms of host receptor adaptation by severe acute respiratory syndrome coronavirus.

Wu, K.Peng, G.Wilken, M.Geraghty, R.J.Li, F.

(2012) J Biol Chem 287: 8904-8911

  • DOI: https://doi.org/10.1074/jbc.M111.325803
  • Primary Citation of Related Structures:  
    3SCI, 3SCJ, 3SCK, 3SCL

  • PubMed Abstract: 

    The severe acute respiratory syndrome coronavirus (SARS-CoV) from palm civets has twice evolved the capacity to infect humans by gaining binding affinity for human receptor angiotensin-converting enzyme 2 (ACE2). Numerous mutations have been identified in the receptor-binding domain (RBD) of different SARS-CoV strains isolated from humans or civets. Why these mutations were naturally selected or how SARS-CoV evolved to adapt to different host receptors has been poorly understood, presenting evolutionary and epidemic conundrums. In this study, we investigated the impact of these mutations on receptor recognition, an important determinant of SARS-CoV infection and pathogenesis. Using a combination of biochemical, functional, and crystallographic approaches, we elucidated the molecular and structural mechanisms of each of these naturally selected RBD mutations. These mutations either strengthen favorable interactions or reduce unfavorable interactions with two virus-binding hot spots on ACE2, and by doing so, they enhance viral interactions with either human (hACE2) or civet (cACE2) ACE2. Therefore, these mutations were viral adaptations to either hACE2 or cACE2. To corroborate the above analysis, we designed and characterized two optimized RBDs. The human-optimized RBD contains all of the hACE2-adapted residues (Phe-442, Phe-472, Asn-479, Asp-480, and Thr-487) and possesses exceptionally high affinity for hACE2 but relative low affinity for cACE2. The civet-optimized RBD contains all of the cACE2-adapted residues (Tyr-442, Pro-472, Arg-479, Gly-480, and Thr-487) and possesses exceptionally high affinity for cACE2 and also substantial affinity for hACE2. These results not only illustrate the detailed mechanisms of host receptor adaptation by SARS-CoV but also provide a molecular and structural basis for tracking future SARS-CoV evolution in animals.


  • Organizational Affiliation

    Department of Pharmacology,University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Angiotensin-converting enzyme 2
A, B
603Homo sapiensMutation(s): 0 
Gene Names: ACE2UNQ868/PRO1885
EC: 3.4.17.23
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BYF1 (Homo sapiens)
Explore Q9BYF1 
Go to UniProtKB:  Q9BYF1
PHAROS:  Q9BYF1
GTEx:  ENSG00000130234 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BYF1
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Spike glycoproteinC [auth E],
D [auth F]
186Severe acute respiratory syndrome-related coronavirusMutation(s): 0 
Gene Names: S2
UniProt
Find proteins for P59594 (Severe acute respiratory syndrome coronavirus)
Explore P59594 
Go to UniProtKB:  P59594
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP59594
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.219α = 90
b = 119.277β = 92.19
c = 113.236γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-08
    Type: Initial release
  • Version 1.1: 2019-07-17
    Changes: Data collection, Refinement description
  • Version 1.2: 2020-09-16
    Changes: Database references, Derived calculations