Crystal structure of the post-fusion core of the Human coronavirus 229E spike protein at 1.86 Å resolution

Acta Crystallographica. Section D, Structural Biology
Lei YanBei Yang

Abstract

Human coronavirus 229E (HCoV-229E) usually causes mild upper respiratory infections in heathy adults, but may lead to severe complications or mortality in individuals with weakened immune systems. Virus entry of HCoV-229E is mediated by its spike (S) protein, where the S1 domain facilitates attachment to host cells and the S2 domain is involved in subsequent fusion of the virus and host membranes. During the fusion process, two heptad repeats, HR1 and HR2, in the S2 domain assemble into a six-helix membrane-fusion structure termed the fusion core. Here, the complete fusion-core structure of HCoV-229E has been determined at 1.86 Å resolution, representing the most complete post-fusion conformation thus far among published human alphacoronavirus (α-HCoV) fusion-core structures. The overall structure of the HCoV-229E fusion core is similar to those of SARS, MERS and HCoV-NL63, but the packing of its 3HR1 core differs from those of SARS and MERS in that it contains more noncanonical `x' and `da' layers. Side-by-side electrostatic surface comparisons reveal that the electrostatic surface potentials are opposite in α-HCoVs and β-HCoVs at certain positions and that the HCoV-229E surface also appears to be the most hydrophobic among th...Continue Reading

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Citations

Jan 21, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Konstantina VougogiannopoulouAlexios-Leandros Skaltsounis
Mar 1, 2021·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Shukur Wasman SmailMuhammad Safdar
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