Interplay between NRF2 post-translational modifications and protein-protein interactions: Perspectives from emerging structural and functional evidence
Abstract
Nuclear factor erythroid 2-related factor 2 (NRF2), a redox-sensitive transcription factor, is a master regulator of cellular adaptation to diverse types of stressors. Under basal conditions, the regulation of NRF2 is governed by Kelch-like ECH-associated protein 1 (KEAP1), an adaptor subunit of the CUL3-based E3 ubiquitin ligase, which promotes the ubiquitination and subsequent degradation of NRF2. However, when electrophilic or oxidative stressors alter the conformation of the KEAP1–NRF2 complex, KEAP1 loses its regulatory control over newly synthesized NRF2, leading to its accumulation and nuclear translocation, where it exerts transcriptional activity. NRF2 stability and activity are also shaped by a broader spectrum of protein–protein interactions (PPIs), including recently emerging regulators such as peptidyl prolyl isomerase (PIN1). Significantly, many of these dynamic PPI networks are regulated by post-translational modifications (PTMs), which, in turn, can be governed by these PPIs. While major PTMs such as phosphorylation and ubiquitination constitute the central regulatory processes, atypical or less-characterized modifications, including SUMOylation and O-GlcNAcylation, are gaining increasing attention for their tissue and condition-specific roles. This review compiles the latest structural and functional evidence on well-known as well as understudied PTMs and PPIs of NRF2, emphasizing the dynamic interplay between these regulatory mechanisms in shaping NRF2 signaling under physiological and stress conditions.
Article type: Review Article
Keywords: NRF2, PPIs, KEAP1, PTM-Code, Regulatory mechanisms
Affiliations: Health Institutes of Turkiye, Turkiye Biotechnology Institute, Ankara, 06270, Turkiye; Department of Immunology, Faculty of Medicine, Çanakkale Onsekiz Mart University, Çanakkale, Turkiye; Division of Cancer Research, School of Medicine, University of Dundee, Scotland, United Kingdom; Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Doctoral School of Exact and Natural Sciences, Jagiellonian University, Kraków, Poland; Leicester Institute for Structural and Chemical Biology, University of Leicester, Leicester, LE1 7RH, United Kingdom; School of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom; Department of Chemistry and Institute of Chemical Biology & Drug Discovery, Stony Brook University, Stony Brook, NY, USA; Department of Physiology, Pharmacology and Therapeutics, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Molecular Biology and Genetics, Faculty of Arts and Science, Canakkale Onsekiz Mart University, Canakkale, 17020, Turkiye
License: © 2026 The Authors CC BY 4.0 This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Article links: DOI: 10.1016/j.abb.2026.110847 | PubMed: 42097191 | PMC: PMC13271694
Relevance: Moderate: mentioned 3+ times in text
Full text: PDF (439 KB)
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