Structural basis for the recognition of SARS-CoV-2 by full-length human ACE2

Science. 2020 Mar 27;367(6485):1444-1448. doi: 10.1126/science.abb2762. Epub 2020 Mar 4.

Abstract

Angiotensin-converting enzyme 2 (ACE2) is the cellular receptor for severe acute respiratory syndrome-coronavirus (SARS-CoV) and the new coronavirus (SARS-CoV-2) that is causing the serious coronavirus disease 2019 (COVID-19) epidemic. Here, we present cryo-electron microscopy structures of full-length human ACE2 in the presence of the neutral amino acid transporter B0AT1 with or without the receptor binding domain (RBD) of the surface spike glycoprotein (S protein) of SARS-CoV-2, both at an overall resolution of 2.9 angstroms, with a local resolution of 3.5 angstroms at the ACE2-RBD interface. The ACE2-B0AT1 complex is assembled as a dimer of heterodimers, with the collectrin-like domain of ACE2 mediating homodimerization. The RBD is recognized by the extracellular peptidase domain of ACE2 mainly through polar residues. These findings provide important insights into the molecular basis for coronavirus recognition and infection.

Publication types

  • Research Support, Non-U.S. Gov't
  • Video-Audio Media

MeSH terms

  • Amino Acid Sequence
  • Amino Acid Transport Systems, Neutral / ultrastructure*
  • Betacoronavirus
  • Coronavirus Infections
  • Cryoelectron Microscopy
  • Humans
  • Models, Molecular
  • Pandemics
  • Peptidyl-Dipeptidase A / ultrastructure*
  • Pneumonia, Viral
  • Protein Binding
  • Protein Domains
  • Protein Multimerization
  • Receptors, Virus / ultrastructure*
  • SARS Virus
  • Sequence Alignment
  • Spike Glycoprotein, Coronavirus / ultrastructure*

Substances

  • Amino Acid Transport Systems, Neutral
  • Receptors, Virus
  • SLC6A19 protein, human
  • Spike Glycoprotein, Coronavirus
  • spike protein, SARS-CoV-2
  • Peptidyl-Dipeptidase A
  • angiotensin converting enzyme 2

Supplementary concepts

  • COVID-19
  • severe acute respiratory syndrome coronavirus 2