ArticleFASEB journal : official publication of the Federation of American Societies for Experimental Biology2011
Tyrosine phosphorylation controls nuclear export of Fyn, allowing Nrf2 activation of cytoprotective gene expression.
Article in FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
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Who cites it
53 citing papers in PubMed, 97 citations in OpenAlex.
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- Role of NRF2 in Lung Cancer.Cells · 2021Review
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- Macrophage Function and the Role of GSK3.International journal of molecular sciences · 2021Review
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- Protective Role of Nrf2 in Renal Disease.Antioxidants (Basel, Switzerland) · 2020Review
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- RETRACTED: Protective Effects ofLife (Basel, Switzerland) · 2020Article
- The stress response protein REDD1 promotes diabetes-induced oxidative stress in the retina by Keap1-independent Nrf2 degradation.The Journal of biological chemistry · 2020Article
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2 authors at 1 institution in 1 country.
Funding
Abstract
Fyn, an Src kinase family member, acts as a negative regulator of NF-E2-related factor 2 (Nrf2). Under stressful conditions, Nrf2 translocates into the nucleus and binds to the antioxidant response element (ARE), activating defensive gene expression. Once Nrf2 completes activation, Fyn phosphorylates tyrosine 568 of Nrf2, resulting in the nuclear export and degradation of Nrf2. The present studies demonstrate that within 0.5 h of antioxidant treatment in human hepatoblastoma (HepG2) cells, Fyn exports out of the nucleus, allowing Nrf2 unimpeded movement to the ARE. Mutation of tyrosine 213 of Fyn stymied nuclear export, suggesting that tyrosine phosphorylation controls nuclear export. Mass spectrometry confirmed tyrosine 213 as the site of phosphorylation. ChIP and real-time PCR assays revealed that FynY213A mutant caused decreased binding of Nrf2 to the promoter of defensive gene NAD(P)H:quinone oxidoreductase 1 (NQO1) and decreased NQO1 expression by 5-fold (P<0.0001) compared to wild-type Fyn. In addition, a putative nuclear export signal (NES) was identified, and mutation of it also inhibited nuclear export of Fyn. Furthermore, FynY213A caused an increased susceptibility to cell death following treatment with etoposide in mouse hepatoma (Hepa-1) cells. The preinduction regulation of Nrf2 is controlled by the nuclear export of Fyn, allowing for activation of defensive gene expression.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.