Table 1. Summary of ebolavirus protein roles.
Protein | Main Role | Secondary Role |
---|---|---|
VP24 | Inhibits IFN-α/β and IFN-γ signalling through interactions with importins, STAT signalling pathways, and NF-κB signalling pathways | Nucleocapsid assembly and stability RNA incorporation into VLPs Regulates transcription and translation |
VP30 | Initiates ebolavirus transcription | Counters RNA interference |
VP35 | Inhibits type-I IFN signalling by inhibiting activation of IRF-3 via dsRNA binding Inhibits type-I IFN production by upregulating SUMOylation of IRF-7 Impairs dendritic cell maturation Counters RNA interference Inhibits antiviral effects by blocking protein kinase R |
Assembly of viral complex with NP and VP30 Regulates RNA synthesis by modulating NP–RNA interactions and by interacting with dynein LC8 |
VP40 | Viral assembly and budding | Counters RNA interference Induces apoptosis in bystander lymphocytes |
GP | Virus attachment and entry | Late-stage cytotoxicity in cells Decreases endothelial barrier function Directly triggers T-lymphocyte death and augments monocyte maturation |
NP | Key component of ribonucleoprotein complex, encapsidates viral genome and protects viral mRNA from degradation | |
L | Involved in transcription and regulation of viral genome and mRNA editing |
Abbreviations: dsRNA, double-stranded RNA; GP, glycoprotein; IFN, interferon; IRF, interferon regulatory factor; L, L-polymerase; LC8, light chain 8; NF-κB, nuclear factor kappa B; NP, nucleoprotein; STAT, signal transducer and activator of transcription; SUMO, small ubiquitin-like modifier; VLPs, virus-like particles; VP, viral protein