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Related Concept Videos

Master Transcription Regulators02:23

Master Transcription Regulators

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Related Experiment Video

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An Adipocyte Cell Culture Model to Study the Impact of Protein and Micro-RNA Modulation on Adipocyte Function
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An Hsp20-FBXO4 Axis Regulates Adipocyte Function through Modulating PPARγ Ubiquitination.

Jiangtong Peng1, Yutian Li2, Xiaohong Wang2

  • 1Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China.

Cell Reports
|June 21, 2018
PubMed
Summary

Heat shock protein 20 (Hsp20) acts as a negative regulator of adipocyte function. Removing Hsp20 improves metabolism and reduces inflammation by enhancing energy expenditure.

Keywords:
FBXO4Hsp20PPARγlipogenesisthermogenesisubiquitination

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Area of Science:

  • Metabolic regulation
  • Cellular stress response
  • Adipocyte biology

Background:

  • Cold exposure activates heat shock proteins (Hsps) and brown/beige adipocytes for thermogenesis.
  • The precise role of Hsps in regulating adipocyte function for energy homeostasis remains unclear.

Purpose of the Study:

  • To investigate the role of heat shock protein 20 (Hsp20) in adipocyte function and energy metabolism.
  • To elucidate the molecular mechanisms by which Hsp20 influences adipocyte activity.

Main Methods:

  • Gene deletion studies of Hsp20 in animal models.
  • Analysis of non-shivering thermogenesis, inflammatory markers, and glucose/lipid metabolism.
  • Investigation of molecular interactions involving Hsp20, FBXO4, and PPARγ.

Main Results:

  • Hsp20 deletion enhanced non-shivering thermogenesis and suppressed inflammation.
  • Hsp20 deficiency improved glucose and lipid metabolism under normal and high-fat diet conditions.
  • Hsp20 interacts with FBXO4 to regulate the degradation of peroxisome proliferation activated receptor gamma (PPARγ).

Conclusions:

  • Hsp20 acts as a negative regulator of adipocyte function.
  • Hsp20 deficiency improves metabolic health by enhancing thermogenesis and reducing inflammation.
  • Hsp20 links β-adrenergic signaling to PPARγ activity in adipocytes.