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An interferon-stimulated gene (ISG) is a gene that can be expressed in response to stimulation by interferon. [1] [2] Interferons bind to receptors on the surface of a cell, initiating protein signaling pathways within the cell. This interaction leads to the expression of a subset of genes involved in the innate immune system response. [1]
Interferon-stimulated gene 15 (ISG15) is a 17 kDa secreted protein that in humans is encoded by the ISG15 gene. [ 5 ] [ 6 ] ISG15 is induced by type I interferon (IFN) and serves many functions, acting both as an extracellular cytokine and an intracellular protein modifier.
Interferome is an online bioinformatics database of interferon-regulated genes (IRGs). [1] These Interferon Regulated Genes are also known as Interferon Stimulated Genes (ISGs). The database contains information on type I (IFN alpha, beta), type II (IFN gamma) and type III (IFN lambda) regulated genes and is regularly updated.
The gene encoding IFNα2, the IFNA2 gene, is clustered with all other type I IFN genes on chromosome 9 [8] and as all type I IFN genes, it is devoid of intron. [9] The open reading frame (coding sequence) of IFNA2 codes for a pre-protein of 188 amino acids with a 23 amino acid signal peptide allowing secretion of the mature protein.
Interferon-induced protein with tetratricopeptide repeats 2 (commonly termed IFIT2) is a protein that in humans is directed to be produced by the IFIT2 gene. [5] [6] [7] Previously, this gene was termed the G10P2, GARG-39, IFI-54, IFI-54K, IFI54, IFIT-2, ISG-54 K, ISG-54K, ISG54, or P54 gene and the protein that it directs to be produced was termed the G10P2, GARG-39, IFI-54, IFI-54K, IFI54 ...
STAT1 homodimers are involved in type II interferon signalling, and bind to the GAS (Interferon-Gamma Activated Sequence) promoter to induce expression of interferon stimulated genes (ISG). In type I interferon signaling, STAT1-STAT2 heterodimer combines with IRF9 (Interferon Response Factor) to form ISGF3 (Interferon Stimulated Gene Factor ...
[29] [30] [31] The ability of interferon to induce protein production from interferon stimulated genes (ISGs) can also be affected. Production of protein kinase R, for example, can be disrupted in cells infected with JEV. [26] Some viruses escape the anti-viral activities of interferons by gene (and thus protein) mutation.
[13] [14] This leads to induction of classical interferon stimulated genes (ISGs). [15] The noncanonical signaling pathway includes mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase thymoma viral proto-onco- gene 1 (PI3K-AKT1) cascades. [16] IFN-τ can also stimulate expression of interleukins IL-6 and IL-8.