6ACG

Trypsin-cleaved and low pH-treated SARS-CoV spike glycoprotein and ACE2 complex, ACE2-bound conformation 1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cryo-EM structure of the SARS coronavirus spike glycoprotein in complex with its host cell receptor ACE2.

Song, W.Gui, M.Wang, X.Xiang, Y.

(2018) PLoS Pathog. 14: e1007236-e1007236

  • DOI: 10.1371/journal.ppat.1007236
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The trimeric SARS coronavirus (SARS-CoV) surface spike (S) glycoprotein consisting of three S1-S2 heterodimers binds the cellular receptor angiotensin-converting enzyme 2 (ACE2) and mediates fusion of the viral and cellular membranes through a pre- t ...

    The trimeric SARS coronavirus (SARS-CoV) surface spike (S) glycoprotein consisting of three S1-S2 heterodimers binds the cellular receptor angiotensin-converting enzyme 2 (ACE2) and mediates fusion of the viral and cellular membranes through a pre- to postfusion conformation transition. Here, we report the structure of the SARS-CoV S glycoprotein in complex with its host cell receptor ACE2 revealed by cryo-electron microscopy (cryo-EM). The complex structure shows that only one receptor-binding domain of the trimeric S glycoprotein binds ACE2 and adopts a protruding "up" conformation. In addition, we studied the structures of the SARS-CoV S glycoprotein and its complexes with ACE2 in different in vitro conditions, which may mimic different conformational states of the S glycoprotein during virus entry. Disassociation of the S1-ACE2 complex from some of the prefusion spikes was observed and characterized. We also characterized the rosette-like structures of the clustered SARS-CoV S2 trimers in the postfusion state observed on electron micrographs. Structural comparisons suggested that the SARS-CoV S glycoprotein retains a prefusion architecture after trypsin cleavage into the S1 and S2 subunits and acidic pH treatment. However, binding to the receptor opens up the receptor-binding domain of S1, which could promote the release of the S1-ACE2 complex and S1 monomers from the prefusion spike and trigger the pre- to postfusion conformational transition.


    Organizational Affiliation

    The Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Collaborative Innovation Center for Biotherapy, School of Life Sciences, Tsinghua University, Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spike glycoprotein
A, B, C
1203Human SARS coronavirusMutation(s): 0 
Gene Names: S
Find proteins for P59594 (Human SARS coronavirus)
Go to UniProtKB:  P59594
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Angiotensin-converting enzyme 2
D
603Homo sapiensMutation(s): 0 
Gene Names: ACE2
EC: 3.4.17.23
Find proteins for Q9BYF1 (Homo sapiens)
Go to Gene View: ACE2
Go to UniProtKB:  Q9BYF1
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2018-07-26 
  • Released Date: 2018-08-08 
  • Deposition Author(s): Gui, M., Song, W.

Revision History 

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2018-08-22
    Type: Data collection, Database references