Submissions
GlyTouCan
Glycan Structure Repository
GlyComb
Glycoconjugate Repository
GlycoPOST
Glycomics MS raw data Repository
UniCarb-DR
Glycomics MS Repository for glycan annotations from GlycoWorkbench
LM-GlycoRepo
Repository for lectin-assisted multimodality data
All Resources
Genes / Proteins / Lipids Glycans / Glycoconjugates Glycomes Pathways / Interactions / Diseases / OrganismsTools
SugarDrawer
GlycanBuilder
Glycan Converters
GlycoMaple
GlycomeAtlas
LM-GlycomeAtlas
GALAXY
MCAW
GlycoSim
GRable
Guidelines
MIRAGE
Virion Assembly and Release
Summary
- Organism
- Homo sapiens (human)
- Reactome
- R-HSA-9679509
- PubChem
- R-HSA-9679509
- Description
-
- SARS viral assembly occurs at the ERGIC membrane (reviewed in Masters, 2006; Fehr and Perlman, 2015; Fung and Liu, 2019). Membrane protein components of the virus concentrate at the ERGIC membrane but are also found throughout the secretory system including at the plasma membrane. Accumulation at the site of viral assembly has been shown to depend on interaction between retrieval signals in the cytoplasmic tails of viral proteins and host factors such as the COPI coat, and likely involves repeated rounds of anterograde and retrograde traffic (McBride et al, 2007; Ujike et al, 2016; Tan et al, 2004; Tan et al, 2005; reviewed in McBride and Fielding, 2012; Chang et al, 2014).
Viral assembly is intitiated by homotypic interactions of M protein (Tseng et al, 2010; Siu et al, 2008). This forms an M-lattice that contributes to the induction of membrane curvature and additionally acts as a scaffold for the recruitment of the other structural components of the virus (Voss et al, 2009). M protein makes interactions with each of the main components of the mature virus, including E, S and N (He et al, 2004; Luo et al, 2006; Siu et al, 2008; reviewed in Masters, 2006). Electron micrographic studies suggest the final size of the mature virus is ~100 nm. The ribonuclear particle is predominantly helical and is packaged with an outer diamter of ~ 16 nm (Neuman et al, 2006; Neuman et al, 2011; reviewed in Chang et al, 2014). These physical constraints suggest a final stoichiometry in the mature virion of 75 S trimers:1200 M proteins:300 N:1 RNA genome (Neuman et al, 2011; reviewed in Chang et al, 2014). Minor amounts of other viral proteins, including proteins E, 3a and 7a may also be components of the mature virus, although their functions are not well established (reviewed in Schoeman and Fielding, 2019; Liu et al, 2014).
- SARS viral assembly occurs at the ERGIC membrane (reviewed in Masters, 2006; Fehr and Perlman, 2015; Fung and Liu, 2019). Membrane protein components of the virus concentrate at the ERGIC membrane but are also found throughout the secretory system including at the plasma membrane. Accumulation at the site of viral assembly has been shown to depend on interaction between retrieval signals in the cytoplasmic tails of viral proteins and host factors such as the COPI coat, and likely involves repeated rounds of anterograde and retrograde traffic (McBride et al, 2007; Ujike et al, 2016; Tan et al, 2004; Tan et al, 2005; reviewed in McBride and Fielding, 2012; Chang et al, 2014).
Click on a node on the pathway to see its details. Glycoproteins are marked with a glycoprotein icon in their name.
| UniProt ID | Protein Name | Gene Symbol | Pathway Viewer |
|---|---|---|---|
| P59594 | Spike glycoprotein |
|
view |
| P59596 | Membrane protein |
|
view |
| P59632 | ORF3a protein |
|
view |
