LIS - Legume Information System
Information about legume traits for crop improvement
CicerMine
v5.1.0.3
Cicer data from the Legume Information System
v5.1.0.3
Cicer data from the Legume Information System
| Type | Domain |
| Description | The CoV Spike (S) protein is an envelope glycoprotein that plays the most important role in viral attachment, fusion, and entry into host cells, and serves as a major target for the development of neutralizing antibodies, inhibitors of viral entry, and vaccines. It is synthesised as a precursor protein that is cleaved into an N-terminal S1 subunit (~700 amino acids) and a C-terminal S2 subunit (~600 amino acids) that mediates attachment and membrane fusion, respectively. Three S1/S2 heterodimers assemble to form a trimer spike protruding from the viral envelope. The S1 subunit contains a receptor-binding domain (RBD), while the S2 subunit contains a hydrophobic fusion peptide and two heptad repeat regions. S1 contains two structurally independent domains, the N-terminal domain (NTD) and the C-terminal domain (C-domain). Depending on the virus, either the NTD or the C-domain can serve as the receptor-binding domain (RBD). Most CoVs, including SARS-CoV-2, SARS-CoV, and MERS-CoV use the C-domain to bind their receptors. However, CoV such as mouse hepatitis virus (MHV) uses the NTD to bind its receptor, mouse carcinoembryonic antigen related cell adhesion molecule 1a (mCEACAM1a). The S1 NTD contributes to the Spike trimer interface [, , , ].This entry represents the receptor-binding domain (RBD) of the S1 subunit of the Spike (S) protein from several lineage A betacoronaviruses in the embecovirus genera, including human coronavirus OC43 (HCoV-OC43) and bovine respiratory coronavirus (BCoV), among others. HCoV-OC43 is of zoonotic origin and is endemic in the human population, causing mild respiratory tract infections and possible severe complications or fatalities in young children, the elderly, and immunocompromised individuals. HCoV-OC43 uses 9-O-acetyl-sialic acid (9-O-Ac-Sia) as a receptor, which is terminally linked to oligosaccharides decorating glycoproteins and gangliosides at the host cell surface. HCoV-OC43 appears to bind 9-O-Ac-Sia at the NTD [ ]. |
| Short Name | Spike_S1_RBD_HCoV-OC43-like |
