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Updated: Mar 19, 2026

Production of Nurr-1 Specific Polyclonal Antibodies Free of Cross-reactivity Against Its Close Homologs, Nor1 and Nur77
Published on: August 17, 2015
Modulation of Nur77-DNA interactions by the glucocorticoid receptor
Laurens W H J Heling1,2, Kristina Kovač3, Carlie J M de Vries3,4,5
1Medical Systems Biophysics and Bioengineering, Division of Systems Pharmacology and Pharmacy, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands.
Glucocorticoid receptor (GR) stabilizes Nur77 DNA binding, while its ligand dexamethasone (Dex) reduces Nur77 DNA interaction frequency. This reveals distinct GR and Dex effects on Nur77 binding dynamics.
Area of Science:
- Molecular biology
- Biophysics
- Genetics
Background:
- Nuclear receptors (NRs) regulate critical cellular functions.
- Dysregulated NR signaling contributes to various human diseases.
- Nur77 and glucocorticoid receptor (GR) interplay is vital for inflammatory and stress responses.
Purpose of the Study:
- To investigate the molecular mechanisms of GR's modulation of Nur77 DNA binding.
- To elucidate the direct impact of GR and dexamethasone (Dex) on Nur77 DNA binding dynamics.
Main Methods:
- Single-molecule DNA tightrope assays to study Nur77 diffusion and binding.
- Biochemical assays to analyze Nur77-DNA interactions.
- Assessment of GR and Dex effects on Nur77 DNA binding kinetics.
Main Results:
- Nur77 uses a 3D diffusion search on DNA with transient interactions.
- GR stabilizes Nur77-DNA interactions by slowing dissociation.
- Dex alone significantly reduces Nur77 DNA binding affinity and frequency.
Conclusions:
- GR and Dex exert distinct modulatory effects on Nur77 DNA binding.
- GR stabilizes Nur77 interactions, while Dex decreases binding frequency.
- Findings provide biophysical insights into NR cross-talk and regulation.
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