II型干扰素
II型干扰素只有干扰素伽玛（干扰素-γ, Interferon-γ）一个成员。 成熟的干扰素伽玛蛋白是反平行二聚体，可以与结合到干扰素伽玛受体（IFNGR），干扰素伽玛受体由两个亚基组成。
| II型干扰素 (γ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 | |||||||||
| 鑑定 | |||||||||
| 標誌 | IFN-gamma | ||||||||
| Pfam | PF00714（旧版） | ||||||||
| InterPro | IPR002069 | ||||||||
| CATH | 1d9cA00 | ||||||||
| SCOP | d1d9ca_ / SUPFAM | ||||||||
| |||||||||
来源
干扰素伽玛是由活化T细胞和自然杀伤细胞（NK细胞）产生的。 在辅助T细胞中，I型辅助T细胞（Th1细胞）释放干扰素伽玛；II型辅助T细胞（Th2细胞）释放白细胞介素-4 (IL-4) 和白细胞介素-13 (IL-13)。
功能
干扰素伽玛参与调节免疫和炎症反应；
參考文獻
- Kosmidis C., Sapalidis K., Koletsa T., Kosmidou M., Efthimiadis C. and Anthimidis G. (2018). Interferon-γ and Colorectal Cancer: an up-to date. Journal of Cancer, 9(2), 232-238.
- Young, H. A. (1996) Regulation of interferon-gamma gene expression. J. Interferon Cytokine Res. 16, 563–568.
- Frucht, D. M., Fukao, T., Bogdan, C., Schindler, H., O'Shea, J. J., Koyasu, S. (2001) IFN-gamma production by antigen-presenting cells: mechanisms emerge. Trends Immunol. 22, 556–560.
- Gessani, S., Belardelli, F. (1998) IFN-gamma expression in macrophages and its possible biological significance. Cytokine Growth Factor Rev. 9, 117–123
- Schroder K., Hertzog P.J., Ravasi T. and Hume D. A. (2004) Interferon-: an overview of signals, mechanisms and functions. Journal of Leukocyte Biology, 75(2), 163-189.
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