Comprehensive characterization of N- and O- glycosylation of SARS-CoV-2 human receptor angiotensin converting enzyme 2.
View ORCID ProfileAsif Shajahan, View ORCID ProfileStephanie A Archer-hartmann, Nitin T Supekar, View ORCID ProfileAnne S. Gleinich, View ORCID ProfileChristian Heiss, View ORCID ProfileParastoo Azadi
doi: https://doi.org/10.1101/2020.05.01.071688
Abstract
Emergence of COVID-19 pandemic caused by SARS-CoV-2 demanded development of new therapeutic strategies and thus the understanding the mode of viral attachment, entry and replication has become key aspect for such interventions. The coronavirus surface features a trimeric spike (S) protein that is essential in viral attachment, entry and membrane fusion. The S protein of SARS-CoV-2 binds to the human angiotensin converting enzyme 2 (hACE2) for the entry and the serine protease TMPRSS2 for S protein priming. The heavily glycosylated S protein is comprised of two protein subunits (S1 and S2), and the receptor binding domain within S1 subunit binds with to the hACE2 receptor. Even though hACE2 has been known for two decades and has been recognized as the entry point of several human coronaviruses, no comprehensive glycosylation characterization of hACE2 has been reported.
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