AI Article Synopsis

  • * The study utilized a new sequencing algorithm called StrucGP to analyze the glycosylation of the S protein at specific sites, revealing both common and uncommon glycan structures.
  • * A total of 20 glycosites in the S protein were identified, providing deeper insight into the structural and functional role of glycosylation in the COVID-19 virus.

Article Abstract

The spike (S) protein plays a key role in COVID-19 (SARS-CoV-2) infection and host-cell entry. Previous studies have systematically analyzed site-specific glycan compositions as well as many important structural motifs of the S protein. Here, we further provide structural-clear glycosylation of the S protein at a site-specific level by using our recently developed structural- and site-specific glycoproteomics sequencing algorithm, StrucGP. In addition to the common glycans as detected in previous studies, many uncommon glycosylation structures such as LacdiNAc structures, Lewis structures, Mannose 6-phosphate (M6P) residues, and bisected core structures were unambiguously mapped at a total of 20 glycosites in the S protein trimer and protomer. These data further support the glycosylation structural-functional investigations of the COVID-19 virus spike.

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Source
http://dx.doi.org/10.1021/acs.analchem.2c02265DOI Listing

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