| IED ID | IndEnz0002010194 |
| Enzyme Type ID | protease010194 |
| Protein Name |
Spike glycoprotein S glycoprotein E2 Peplomer protein Cleaved into: Spike protein S1; Spike protein S2; Spike protein S2' |
| Gene Name | S 2 |
| Organism | Bat coronavirus HKU3 (BtCoV) (SARS-like coronavirus HKU3) |
| Taxonomic Lineage | Viruses Riboviria Orthornavirae Pisuviricota Pisoniviricetes Nidovirales Cornidovirineae Coronaviridae Orthocoronavirinae Betacoronavirus Sarbecovirus Severe acute respiratory syndrome coronavirus (SARS-CoV) Bat coronavirus HKU3 (BtCoV) (SARS-like coronavirus HKU3) |
| Enzyme Sequence | MKILIFAFLANLAKAQEGCGIISRKPQPKMAQVSSSRRGVYYNDDIFRSDVLHLTQDYFLPFDSNLTQYFSLNVDSDRYTYFDNPILDFGDGVYFAATEKSNVIRGWIFGSSFDNTTQSAVIVNNSTHIIIRVCNFNLCKEPMYTVSRGTQQNAWVYQSAFNCTYDRVEKSFQLDTTPKTGNFKDLREYVFKNRDGFLSVYQTYTAVNLPRGLPTGFSVLKPILKLPFGINITSYRVVMAMFSQTTSNFLPESAAYYVGNLKYSTFMLRFNENGTITDAVDCSQNPLAELKCTIKNFNVDKGIYQTSNFRVSPTQEVIRFPNITNRCPFDKVFNATRFPNVYAWERTKISDCVADYTVLYNSTSFSTFKCYGVSPSKLIDLCFTSVYADTFLIRSSEVRQVAPGETGVIADYNYKLPDDFTGCVIAWNTAKHDTGNYYYRSHRKTKLKPFERDLSSDDGNGVYTLSTYDFNPNVPVAYQATRVVVLSFELLNAPATVCGPKLSTELVKNQCVNFNFNGLKGTGVLTSSSKRFQSFQQFGRDTSDFTDSVRDPQTLEILDISPCSFGGVSVITPGTNASSEVAVLYQDVNCTDVPTAIRADQLTPAWRVYSTGVNVFQTQAGCLIGAEHVNASYECDIPIGAGICASYHTASVLRSTGQKSIVAYTMSLGAENSIAYANNSIAIPTNFSISVTTEVMPVSMAKTAVDCTMYICGDSLECSNLLLQYGSFCTQLNRALTGIAIEQDKNTQEVFAQVKQMYKTPAIKDFGGFNFSQILPDPSKPTKRSFIEDLLFNKVTLADAGFMKQYGDCLGDVSARDLICAQKFNGLTVLPPLLTDEMVAAYTAALVSGTATAGWTFGAGAALQIPFAMQMAYRFNGIGVTQNVLYENQKLIANQFNSAIGKIQESLSSTASALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLDKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPSQEKNFTTAPAICHEGKAYFPREGVFVSNGTSWFITQRNFYSPQLITTDNTFVSGNCDVVIGIINNTVYDPLQPELDSFKEELDKYFKNHTSPDVDLGDISGINASVVNIQKEIDRLNEVAKNLNESLIDLQELGKYEQYIKWPWYVWLGFIAGLIAIVMVTILLCCMTSCCSCLKGACSCGSCCKFDEDDSEPVLKGVKLHYT |
| Enzyme Length | 1242 |
| Uniprot Accession Number | Q3LZX1 |
| Absorption | |
| Active Site | |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | |
| DNA Binding | |
| EC Number | |
| Enzyme Function | FUNCTION: [Spike protein S1]: Attaches the virion to the cell membrane by interacting with host receptor, initiating the infection. {ECO:0000255|HAMAP-Rule:MF_04099}.; FUNCTION: [Spike protein S2]: Mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein. Under the current model, the protein has at least three conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes. {ECO:0000255|HAMAP-Rule:MF_04099}.; FUNCTION: [Spike protein S2']: Acts as a viral fusion peptide which is unmasked following S2 cleavage occurring upon virus endocytosis. {ECO:0000255|HAMAP-Rule:MF_04099}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | |
| nucleotide Binding | |
| Features | Chain (4); Coiled coil (2); Disulfide bond (7); Domain (2); Glycosylation (22); Motif (1); Region (4); Signal peptide (1); Site (2); Topological domain (2); Transmembrane (1) |
| Keywords | Coiled coil;Disulfide bond;Fusion of virus membrane with host endosomal membrane;Fusion of virus membrane with host membrane;Glycoprotein;Host cell membrane;Host membrane;Host-virus interaction;Lipoprotein;Membrane;Palmitate;Signal;Transmembrane;Transmembrane helix;Viral attachment to host cell;Viral envelope protein;Viral penetration into host cytoplasm;Virion;Virulence;Virus entry into host cell |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: Virion membrane {ECO:0000255|HAMAP-Rule:MF_04099}; Single-pass type I membrane protein {ECO:0000255|HAMAP-Rule:MF_04099}. Host endoplasmic reticulum-Golgi intermediate compartment membrane {ECO:0000255|HAMAP-Rule:MF_04099}; Single-pass type I membrane protein {ECO:0000255|HAMAP-Rule:MF_04099}. Host cell membrane {ECO:0000255|HAMAP-Rule:MF_04099}; Single-pass type I membrane protein {ECO:0000255|HAMAP-Rule:MF_04099}. Note=Accumulates in the endoplasmic reticulum-Golgi intermediate compartment, where it participates in virus particle assembly. Some S oligomers are transported to the host plasma membrane, where they may mediate cell-cell fusion. {ECO:0000255|HAMAP-Rule:MF_04099}. |
| Modified Residue | |
| Post Translational Modification | PTM: Specific enzymatic cleavages in vivo yield mature proteins. The precursor is processed into S1 and S2 by host cell furin or another cellular protease to yield the mature S1 and S2 proteins. Additionally, a second cleavage leads to the release of a fusion peptide after viral attachment to host cell receptor. {ECO:0000255|HAMAP-Rule:MF_04099}.; PTM: The cytoplasmic Cys-rich domain is palmitoylated. Spike glycoprotein is digested within host endosomes. {ECO:0000255|HAMAP-Rule:MF_04099}. |
| Signal Peptide | SIGNAL 1..13; /evidence=ECO:0000255|HAMAP-Rule:MF_04099 |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | - |
| Motif | MOTIF 1238..1242; /note=KxHxx; /evidence=ECO:0000255|HAMAP-Rule:MF_04099 |
| Gene Encoded By | |
| Mass | 137,570 |
| Kinetics | |
| Metal Binding | |
| Rhea ID | |
| Cross Reference Brenda |