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Related Experiment Video

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Native Polyacrylamide Gel Electrophoresis Immunoblot Analysis of Endogenous IRF5 Dimerization

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Published on: October 6, 2019

Mouse interferon regulatory factor-2: expression, purification and DNA binding activity.

Krishna Prakash¹, Pramod C Rath

¹Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India. kpmolbio@gmail.com

Molecular Biology Reports

|May 12, 2011

Summary

This summary is machine-generated.

Researchers purified a functional Interferon regulatory factor-2 (IRF-2) protein. This protein demonstrated specific DNA binding, forming multiple complexes with a key gene sequence, advancing understanding of IRF-2

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Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

Interferon regulatory factor-2 (IRF-2) is a mammalian transcription factor involved in cell growth and potentially oncogenesis.
IRF-2 regulates interferon and interferon-inducible genes, playing a crucial role in cellular processes.

Purpose of the Study:

To express and purify a recombinant murine IRF-2 protein.
To assess the biological activity, specifically DNA binding, of the recombinant IRF-2.

Main Methods:

Recombinant murine IRF-2 (349 amino acids) was expressed as a GST-IRF-2 fusion protein in E. coli XL-1 blue cells.
Purified GST-IRF-2 was tested for DNA binding activity using an IRF-E oligo (GAAAGT)4.
Specificity was confirmed by competition assays with excess IRF-E and by comparing with GST-alone protein.

Main Results:

Recombinant GST-IRF-2 exhibited specific DNA binding activity to the IRF-E oligo.
Five distinct molecular mass complexes of GST-IRF-2/DNA were observed.
These complexes were specific, as demonstrated by competition with excess IRF-E, and GST-alone did not bind.

Conclusions:

The study successfully produced biologically active recombinant murine IRF-2.
The formation of multiple specific DNA-protein complexes provides insights into IRF-2's DNA binding mechanism.
Understanding IRF-2's DNA binding is crucial given its role in cell growth regulation and potential oncogenic activity.