Xing Liu, Jinhua Tang, Zixuan Wang, Chunchun Zhu, Hongyan Deng, Xueyi Sun, Guangqing Yu, Fangjing Rong, Xiaoyun Chen, Qian Liao, Shuke Jia, Wen Liu, Huangyuan Zha, Sijia Fan, Xiaolian Cai, Jian-Fang Gui, Wuhan Xiao
Oxygen is essential for aerobic organisms, but little is known about its role in antiviral immunity. Here, we report that during responses to viral infection, hypoxic conditions repress antiviral-responsive genes independently of HIF signaling. EGLN1 is identified as a key mediator of the oxygen enhancement of antiviral innate immune responses. Under sufficient oxygen conditions, EGLN1 retains its prolyl hydroxylase activity to catalyze the hydroxylation of IRF3 at proline 10. This modification enhances IRF3 phosphorylation, dimerization and nuclear translocation, leading to subsequent IRF3 activation...
April 26, 2024: Nature Communications