Emerging WuHan (COVID-19) coronavirus: glycan shield and structure prediction of spike glycoprotein and its interaction with human CD26

Emerg Microbes Infect. 2020 Mar 17;9(1):601-604. doi: 10.1080/22221751.2020.1739565. eCollection 2020.

Abstract

The recent outbreak of pneumonia-causing COVID-19 in China is an urgent global public health issue with an increase in mortality and morbidity. Here we report our modelled homo-trimer structure of COVID-19 spike glycoprotein in both closed (ligand-free) and open (ligand-bound) conformation, which is involved in host cell adhesion. We also predict the unique N- and O-linked glycosylation sites of spike glycoprotein that distinguish it from the SARS and underlines shielding and camouflage of COVID-19 from the host the defence system. Furthermore, our study also highlights the key finding that the S1 domain of COVID-19 spike glycoprotein potentially interacts with the human CD26, a key immunoregulatory factor for hijacking and virulence. These findings accentuate the unique features of COVID-19 and assist in the development of new therapeutics.

Keywords: CD26; Coronavirus; docking; glycosylation; spike glycoprotein.

Publication types

  • Letter

MeSH terms

  • Betacoronavirus / chemistry
  • Betacoronavirus / genetics
  • Betacoronavirus / metabolism*
  • COVID-19
  • Coronavirus Infections / virology
  • Dipeptidyl Peptidase 4 / chemistry*
  • Dipeptidyl Peptidase 4 / metabolism
  • Humans
  • Models, Molecular
  • Pandemics
  • Pneumonia, Viral / virology
  • Polysaccharides / chemistry*
  • Polysaccharides / metabolism
  • Protein Binding
  • Protein Structure, Quaternary
  • SARS-CoV-2
  • Spike Glycoprotein, Coronavirus / chemistry*
  • Spike Glycoprotein, Coronavirus / genetics
  • Spike Glycoprotein, Coronavirus / metabolism

Substances

  • Polysaccharides
  • Spike Glycoprotein, Coronavirus
  • spike protein, SARS-CoV-2
  • DPP4 protein, human
  • Dipeptidyl Peptidase 4

Grant support

This work was supported by the National Health and Medical Research Council of Australia with grant APP1161916 awarded to J.A.W.