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• W4307130881 abstract "Abstract The regulation of transcription is a complex process that involves binding of transcription factors (TFs) to specific sequences, recruitment of cofactors and chromatin remodelers, assembly of the pre-initiation complex and recruitment of RNA polymerase II. Increasing evidence suggests that TFs are highly dynamic and interact only transiently with DNA. Single molecule microscopy techniques are powerful approaches for tracking individual TF molecules as they diffuse in the nucleus and interact with DNA. Here we employ multifocus microscopy and highly inclined laminated optical sheet microscopy to track TF dynamics in response to perturbations in labile zinc inside cells. We sought to define whether zinc-dependent TFs sense changes in the labile zinc pool by determining whether their dynamics and DNA binding can be modulated by zinc. We used fluorescently tagged versions of the glucocorticoid receptor (GR), with two C4 zinc finger domains, and CCCTC-binding factor (CTCF), with eleven C2H2 zinc finger domains. We found that GR was largely insensitive to perturbations of zinc, whereas CTCF was significantly affected by zinc depletion and its dwell time was affected by zinc elevation. These results indicate that at least some transcription factors are sensitive to zinc dynamics, revealing a potential new layer of transcriptional regulation." @default.
• W4307130881 created "2022-10-28" @default.
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• W4307130881 date "2022-10-22" @default.
• W4307130881 modified "2023-10-14" @default.
• W4307130881 title "Single molecule microscopy to profile the effect of zinc status on transcription factor dynamics" @default.
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• W4307130881 doi "https://doi.org/10.1038/s41598-022-22634-x" @default.
• W4307130881 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36273101" @default.
• W4307130881 hasPublicationYear "2022" @default.
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