Abstract:
:First identified in The Netherlands in 2004, human coronavirus NL63 (HCoV-NL63) was found to cause worldwide infections. Patients infected by HCoV-NL63 are typically young children with upper and lower respiratory tract infection, presenting with symptoms including croup, bronchiolitis, and pneumonia. Unfortunately, there are currently no effective antiviral therapy to contain HCoV-NL63 infection. CoV genomes encode an integral viral component, main protease (M(pro)), which is essential for viral replication through proteolytic processing of RNA replicase machinery. Due to the sequence and structural conservation among all CoVs, M(pro) has been recognized as an attractive molecular target for rational anti-CoV drug design. Here we present the crystal structure of HCoV-NL63 M(pro) in complex with a Michael acceptor inhibitor N3. Structural analysis, consistent with biochemical inhibition results, reveals the molecular mechanism of enzyme inhibition at the highly conservative substrate-recognition pocket. We show such molecular target remains unchanged across 30 clinical isolates of HCoV-NL63 strains. Through comparative study with M(pro)s from other human CoVs (including the deadly SARS-CoV and MERS-CoV) and their related zoonotic CoVs, our structure of HCoV-NL63 M(pro) provides critical insight into rational development of wide spectrum antiviral therapeutics to treat infections caused by human CoVs.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang F,Chen C,Tan W,Yang K,Yang Hdoi
10.1038/srep22677subject
Has Abstractpub_date
2016-03-07 00:00:00pages
22677issn
2045-2322pii
srep22677journal_volume
6pub_type
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