6X6P

Characterization of the SARS-CoV-2 S Protein: Biophysical, Biochemical, Structural, and Antigenic Analysis


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.22 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

Characterization of the SARS-CoV-2 S Protein: Biophysical, Biochemical, Structural, and Antigenic Analysis.

Herrera, N.G.Morano, N.C.Celikgil, A.Georgiev, G.I.Malonis, R.J.Lee, J.H.Tong, K.Vergnolle, O.Massimi, A.B.Yen, L.Y.Noble, A.J.Kopylov, M.Bonanno, J.B.Garrett-Thomson, S.C.Hayes, D.B.Bortz, R.H.Wirchnianski, A.S.Florez, C.Laudermilch, E.Haslwanter, D.Fels, J.M.Dieterle, M.E.Jangra, R.K.Barnhill, J.Mengotto, A.Kimmel, D.Daily, J.P.Pirofski, L.A.Chandran, K.Brenowitz, M.Garforth, S.J.Eng, E.T.Lai, J.R.Almo, S.C.

(2020) Biorxiv 

  • DOI: 10.1101/2020.06.14.150607
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Coronavirus disease 2019 ( COVID-19 ) is a global health crisis caused by the novel severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2 ), and there is a critical need to produce large quantities of high-quality SARS-CoV-2 ...

    Coronavirus disease 2019 ( COVID-19 ) is a global health crisis caused by the novel severe acute respiratory syndrome coronavirus 2 ( SARS-CoV-2 ), and there is a critical need to produce large quantities of high-quality SARS-CoV-2 Spike ( S ) protein for use in both clinical and basic science settings. To address this need, we have evaluated the expression and purification of two previously reported S protein constructs in Expi293F and ExpiCHO-S cells, two different cell lines selected for increased expression of secreted glycoproteins. We show that ExpiCHO-S cells produce enhanced yields of both SARS-CoV-2 S proteins. Biochemical, biophysical, and structural ( cryo-EM ) characterization of the SARS-CoV-2 S proteins produced in both cell lines demonstrate that the reported purification strategy yields high quality S protein (non-aggregated, uniform material with appropriate biochemical and biophysical properties). Importantly, we show that multiple preparations of these two recombinant S proteins from either cell line exhibit identical behavior in two different serology assays. We also evaluate the specificity of S protein-mediated host cell binding by examining interactions with proposed binding partners in the human secretome. In addition, the antigenicity of these proteins is demonstrated by standard ELISAs, and in a flexible protein microarray format. Collectively, we establish an array of metrics for ensuring the production of high-quality S protein to support clinical, biological, biochemical, structural and mechanistic studies to combat the global pandemic caused by SARS-CoV-2.


    Organizational Affiliation

    Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SARS-CoV-2 spike glycoprotein
A, B, C
1274Severe acute respiratory syndrome coronavirus 2Mutation(s): 5 
Gene Names: S2
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2)
Go to UniProtKB:  P0DTC2
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A, B, C
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.22 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Revision History 

  • Version 1.0: 2020-06-10
    Type: Initial release
  • Version 1.1: 2020-07-08
    Changes: Database references