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Biochemical Reconstitution of Steroid Receptor•Hsp90 Protein Complexes and Reactivation of Ligand Binding

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Published on: September 21, 2011

Distinct proteins interacting with the glucocorticoid receptor.

M Schulz¹, R Zhang, H Eggert

¹Institut für Genetik, Justus-Liebig-Universität, Heinrich-Buff-Ring 58-62 D-35392 Giessen, Germany.

Zeitschrift Fur Rheumatologie

|January 13, 2001

Summary

The glucocorticoid receptor (GR) is a transcription factor that regulates gene expression. Researchers identified new GR-interacting proteins (GRIPs), including GRIP170 and GRIP120, which modulate GR-mediated transcription.

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A Protein Preparation Method for the High-throughput Identification of Proteins Interacting with a Nuclear Cofactor Using LC-MS/MS Analysis

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Published on: January 24, 2017

Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

The glucocorticoid receptor (GR) is a key transcription factor regulating gene expression.
GR functions by binding DNA, interacting with other proteins, and influencing transcription.

Purpose of the Study:

To identify and characterize novel proteins that interact with the activated glucocorticoid receptor.
To investigate the role of these novel proteins in modulating GR-mediated transcription.

Main Methods:

A blotting technique using a radioactively labeled GR/GRE complex was employed to identify GR-interacting proteins (GRIPs).
Biochemical purification and microsequencing were used to identify and characterize specific GRIPs.
The functional role of identified GRIPs in GR-mediated transcription was assessed.

Main Results:

A new class of GRIPs was identified through the blotting technique.
Two specific GRIPs, GRIP170 and GRIP120, were purified and characterized.
GRIP170 and GRIP120 were found to play a role in modulating GR-mediated transcription.

Conclusions:

Novel GRIPs, including GRIP170 and GRIP120, have been identified.
These GRIPs are important regulators of glucocorticoid receptor-mediated gene transcription.
Further research into GRIPs can elucidate complex transcriptional regulatory networks.