title: Activating transcription factor 3 is a novel repressor of the nuclear factor erythroid-derived 2-related factor 2 (Nrf2)-regulated stress pathway.
abstract: The transcription factor nuclear factor erythroid-derived 2-related factor 2 (Nrf2) regulates induction of an extensive cellular stress response network when complexed with the cAMP-responsive element binding protein (CBP) at antioxidant response elements (ARE) located in the promoter region of target genes. Activating transcription factor 3 (ATF3) can repress Nrf2-mediated signaling in a manner that is not well understood. Here, we show that ATF3-mediated suppression is a consequence of direct ATF3-Nrf2 protein-protein interactions that result in displacement of CBP from the ARE. This work establishes ATF3 as a novel repressor of the Nrf2-directed stress response pathway.
authors.affiliation: Department of Radiation Oncology and Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.
authors.forename: Stephan L
authors.initials: SL
authors.lastname: Brown
authors.forename: Konjeti R
authors.initials: KR
authors.lastname: Sekhar
authors.forename: Girish
authors.initials: G
authors.lastname: Rachakonda
authors.forename: Soumya
authors.initials: S
authors.lastname: Sasi
authors.forename: Michael L
authors.initials: ML
authors.lastname: Freeman
mesh_terms: D051700:Activating Transcription Factor 3 / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D002478:Cells, Cultured; D005786:Gene Expression Regulation; D051379:Mice; D051267:NF-E2-Related Factor 2 / Q000037:antagonists & inhibitors / Q000378:metabolism / Q000502:physiology*; D011485:Protein Binding; D034741:RNA, Small Interfering / Q000494:pharmacology; D012097:Repressor Proteins / Q000378:metabolism / Q000502:physiology; D020218:Response Elements / Q000187:drug effects; D015398:Signal Transduction / Q000235:genetics; D013312:Stress, Physiological / Q000235:genetics*; D014162:Transfection
chemical_list: D051700:Activating Transcription Factor 3; D000975:Antioxidants; D051267:NF-E2-Related Factor 2; C495636:Nfe2l2 protein, mouse; D034741:RNA, Small Interfering; D012097:Repressor Proteins