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Transducer Mechanism: Nuclear Receptors01:31

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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
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Perspectives on Neuroscience
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The nuclear receptor superfamily: A structural perspective.

Emily R Weikum1, Xu Liu1, Eric A Ortlund1

  • 1Department of Biochemistry, Emory School of Medicine, Atlanta, 30322, Georgia.

Protein Science : a Publication of the Protein Society
|August 16, 2018
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Summary

Nuclear receptors (NRs) are key transcription factors regulating essential body functions. Understanding their structural mechanisms is crucial for developing new therapies for diseases like cancer and metabolic disorders.

Keywords:
DNA binding domainco-regulatorligand binding domainnuclear receptortransactivationtransrepression

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Nuclear receptors (NRs) are transcription factors controlling vital physiological processes including metabolism, reproduction, inflammation, and circadian rhythms.
  • NRs modulate gene expression in response to lipid metabolites through an allosteric mechanism involving ligand binding, DNA interaction, and co-regulator recruitment.
  • NR signaling dysregulation is implicated in malignancies, metabolic disorders, and inflammatory diseases, highlighting their therapeutic relevance.

Purpose of the Study:

  • To review recent advancements in understanding the complex mechanisms of nuclear receptor action.
  • To emphasize the structural perspective in elucidating NR function.
  • To identify future research directions for improved NR signaling comprehension and drug design.

Main Methods:

  • Literature review focusing on structural biology and biophysics of nuclear receptors.
  • Analysis of allosteric mechanisms of NR-ligand-DNA interactions.
  • Integration of structural and biophysical data to understand NR signaling pathways.

Main Results:

  • Nuclear receptors act as sensors for lipid metabolites, translating signals into distinct physiological outcomes via gene regulation.
  • The allosteric binding of ligands and DNA sequences dictates the recruitment of transcriptional co-regulators, leading to transactivation or transrepression.
  • Structural insights reveal the intricate molecular basis of NR function and dysregulation.

Conclusions:

  • Nuclear receptors are critical therapeutic targets due to their roles in physiology and responsiveness to small lipophilic ligands.
  • Further research integrating structural and biophysical approaches will enhance our understanding of NR signaling.
  • This knowledge will facilitate the rational design of novel therapeutics for NR-related diseases.