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Related Concept Videos

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Regulation of the Unfolded Protein Response

Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
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Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
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Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
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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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New developments in FcepsilonRI regulation, function and inhibition.

Stefan Kraft1, Jean-Pierre Kinet

  • 1Laboratory of Allergy and Immunology, Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Institutes of Medicine 945, 71 Avenue Louis Pasteur, Boston, Massachusetts 02215, USA.

Nature Reviews. Immunology
|April 18, 2007
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Recent advances in studying the high-affinity Fc receptor for IgE (FcepsilonRI) reveal antigen-independent responses and signaling pathways. Inhibitory mechanisms controlling FcepsilonRI signaling offer promising therapeutic strategies for allergies.

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Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • The high-affinity Fc receptor for IgE (FcepsilonRI) is central to IgE-mediated allergic reactions.
  • Understanding FcepsilonRI is critical for developing effective allergy treatments.

Approach:

  • This review synthesizes recent advancements in FcepsilonRI research.
  • Focuses on antigen-independent responses, signaling pathways, and inhibitory mechanisms.

Key Points:

  • FcepsilonRI activation triggers biological responses independent of antigen binding.
  • Distinct signaling pathways activated by FcepsilonRI have significant biological relevance.
  • Numerous inhibitory mechanisms tightly control FcepsilonRI signaling.

Conclusions:

  • Advances in understanding FcepsilonRI offer new insights into allergic diseases.
  • Inhibitory mechanisms targeting FcepsilonRI signaling represent promising therapeutic avenues for allergy treatment.