PMID- 26882544 OWN - NLM STAT- MEDLINE DCOM- 20161213 LR - 20210109 IS - 1469-3178 (Electronic) IS - 1469-221X (Print) IS - 1469-221X (Linking) VI - 17 IP - 3 DP - 2016 Mar TI - Response to interferons and antibacterial innate immunity in the absence of tyrosine-phosphorylated STAT1. PG - 367-82 LID - 10.15252/embr.201540726 [doi] AB - Signal transducer and activator of transcription 1 (STAT1) plays a pivotal role in the innate immune system by directing the transcriptional response to interferons (IFNs). STAT1 is activated by Janus kinase (JAK)-mediated phosphorylation of Y701. To determine whether STAT1 contributes to cellular responses without this phosphorylation event, we generated mice with Y701 mutated to a phenylalanine (Stat1(Y701F)). We show that heterozygous mice do not exhibit a dominant-negative phenotype. Homozygous Stat1(Y701F) mice show a profound reduction in Stat1 expression, highlighting an important role for basal IFN-dependent signaling. The rapid transcriptional response to type I IFN (IFN-I) and type II IFN (IFNgamma) was absent in Stat1(Y701F) cells. Intriguingly, STAT1Y701F suppresses the delayed expression of IFN-I-stimulated genes (ISG) observed in Stat1(-/-) cells, mediated by the STAT2/IRF9 complex. Thus, Stat1(Y701F) macrophages are more susceptible to Legionella pneumophila infection than Stat1(-/-) macrophages. Listeria monocytogenes grew less robustly in Stat1(Y701F) macrophages and mice compared to Stat1(-/-) counterparts, but STAT1Y701F is not sufficient to rescue the animals. Our studies are consistent with a potential contribution of Y701-unphosphorylated STAT1 to innate antibacterial immunity. CI - (c) 2016 The Authors. Published under the terms of the CC BY 4.0 license. FAU - Majoros, Andrea AU - Majoros A AD - Max F. Perutz Laboratories, University of Vienna, Vienna, Austria. FAU - Platanitis, Ekaterini AU - Platanitis E AD - Max F. Perutz Laboratories, University of Vienna, Vienna, Austria. FAU - Szappanos, Daniel AU - Szappanos D AD - Max F. Perutz Laboratories, University of Vienna, Vienna, Austria. FAU - Cheon, HyeonJoo AU - Cheon H AD - Department of Molecular Genetics and Proteomics Core, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA. FAU - Vogl, Claus AU - Vogl C AD - Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria. FAU - Shukla, Priyank AU - Shukla P AD - Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria. FAU - Stark, George R AU - Stark GR AD - Department of Molecular Genetics and Proteomics Core, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA. FAU - Sexl, Veronika AU - Sexl V AD - Department for Biomedical Sciences, Institute of Pharmacology and Toxicology University of Veterinary Medicine Vienna, Vienna, Austria. FAU - Schreiber, Robert AU - Schreiber R AD - Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO, USA. FAU - Schindler, Christian AU - Schindler C AD - Departments of Microbiology & Immunology and Medicine, Columbia University, New York, NY, USA. FAU - Muller, Mathias AU - Muller M AD - Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria. FAU - Decker, Thomas AU - Decker T AD - Max F. Perutz Laboratories, University of Vienna, Vienna, Austria thomas.decker@univie.ac.at. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160212 PL - England TA - EMBO Rep JT - EMBO reports JID - 100963049 RN - 0 (IRF9 protein, mouse) RN - 0 (Interferon-Stimulated Gene Factor 3, gamma Subunit) RN - 0 (STAT1 Transcription Factor) RN - 0 (STAT2 Transcription Factor) RN - 0 (Stat1 protein, mouse) RN - 0 (Stat2 protein, mouse) RN - 9008-11-1 (Interferons) SB - IM MH - Animals MH - Cell Line MH - Cells, Cultured MH - *Immunity, Innate MH - Interferon-Stimulated Gene Factor 3, gamma Subunit/metabolism MH - Interferons/*metabolism MH - Legionnaires' Disease/*immunology MH - Listeriosis/*immunology MH - Macrophages/immunology MH - Mice MH - Mice, Inbred C57BL MH - Mutation, Missense MH - Phosphorylation MH - *Protein Processing, Post-Translational MH - STAT1 Transcription Factor/*deficiency/genetics/metabolism MH - STAT2 Transcription Factor/metabolism MH - Second Messenger Systems PMC - PMC4772975 OTO - NOTNLM OT - STAT1 OT - innate immunity OT - interferon OT - pathogen OT - phosphorylation EDAT- 2016/02/18 06:00 MHDA- 2016/12/15 06:00 PMCR- 2017/03/01 CRDT- 2016/02/17 06:00 PHST- 2015/05/22 00:00 [received] PHST- 2016/01/13 00:00 [accepted] PHST- 2016/02/17 06:00 [entrez] PHST- 2016/02/18 06:00 [pubmed] PHST- 2016/12/15 06:00 [medline] PHST- 2017/03/01 00:00 [pmc-release] AID - embr.201540726 [pii] AID - EMBR201540726 [pii] AID - 10.15252/embr.201540726 [doi] PST - ppublish SO - EMBO Rep. 2016 Mar;17(3):367-82. doi: 10.15252/embr.201540726. Epub 2016 Feb 12.