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Regulation of the Unfolded Protein Response

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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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Regulation of Expression at Multiple Steps

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Protein Modifications in the RER

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Master Transcription Regulators

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A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3

A High Resolution Method to Monitor Phosphorylation-dependent Activation of IRF3

Published on: January 24, 2016

IRF7: activation, regulation, modification and function.

S Ning¹, J S Pagano, G N Barber

¹Division of Hematology/Oncology, Department of Medicine, Viral Oncology Program, Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136, USA. sning@med.miami.edu

Genes and Immunity

|April 15, 2011

Summary

This summary is machine-generated.

Interferon regulatory factor 7 (IRF7) is vital for antiviral immunity by regulating type I interferons (IFNs). Its activity, crucial for preventing diseases like cancer, is controlled by posttranslational modifications such as phosphorylation and ubiquitination.

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Published on: March 24, 2017

Area of Science:

Immunology
Molecular Biology
Virology

Background:

Interferon regulatory factor 7 (IRF7) is a key regulator of type I interferons (IFNs), essential for innate immunity against pathogens.
IRF7 activation is triggered by pathogen recognition receptors (PRRs) sensing microbial nucleic acids.
IRF7 also plays a role in Epstein-Barr virus (EBV) latency, being induced and activated by the EBV oncoprotein latent membrane protein-1 (LMP1).

Purpose of the Study:

To highlight the critical role of IRF7 in type I interferon production and its implications in diseases.
To discuss the regulatory mechanisms governing IRF7 activity, particularly posttranslational modifications.
To identify remaining questions regarding IRF7 function and regulation.

Main Methods:

Review of existing literature on IRF7 function, regulation, and involvement in viral infections and diseases.
Analysis of signaling pathways leading to IRF7 activation.
Examination of posttranslational modifications, including phosphorylation and ubiquitination, in IRF7 regulation.

Main Results:

IRF7 is a crucial transcription factor for type I IFN production in response to various infections.
Aberrant type I IFN production, linked to dysregulated IRF7, is associated with cancers and autoimmune disorders.
Posttranslational modifications, notably phosphorylation and ubiquitination, are critical for regulating IRF7 activity and function.

Conclusions:

Tight regulation of IRF7 is essential for appropriate type I IFN responses and maintaining physiological functions.
Understanding IRF7 regulation, especially through posttranslational modifications, is key to addressing diseases associated with aberrant IFN production.
Further research is needed to fully elucidate the complex roles and regulatory networks of IRF7.