| 背景 | Interferon gamma (Interferon gamma,IFN-gamma,Immune interferon,IFNG) is a ~19 kDa protein. Type II interferon produced by immune cells such as T-cells and NK cells that plays crucial roles in antimicrobial, antiviral, and antitumor responses by activating effector immune cells and enhancing antigen presentation. Primarily signals through the JAK-STAT pathway after interaction with its receptor IFNGR1 to affect gene regulation. Upon IFNG binding, IFNGR1 intracellular domain opens out to allow association of downstream signaling components JAK2, JAK1 and STAT1, leading to STAT1 activation, nuclear translocation and transcription of IFNG-regulated genes. Many of the induced genes are transcription factors such as IRF1 that are able to further drive regulation of a next wave of transcription. Plays a role in class I antigen presentation pathway by inducing a replacement of catalytic proteasome subunits with immunoproteasome subunits. 1. El Bougrini, J. et al. (2006) Cellular and molecular biology (Noisy-le-Grand, France) 52, 9-15. PMID: 169140932. Hisamatsu, H. et al. (1996) The Journal of experimental medicine 183, 1807-16. PMID: 86669373. Greenlund, AC. et al. (1993) The Journal of biological chemistry 268, 18103-10. PMID: 83496874. Akiyama, K. et al. (1994) FEBS letters 343, 85-8. PMID: 81630245. Fabunmi, RP. et al. (2001) Journal of cell science 114, 29-36. PMID: 11112687 |
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