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High-throughput Purification of Affinity-tagged Recombinant Proteins
Published on: August 26, 2012
Transcription factor cooperativity with heat shock factor 1.
Naoki Hayashida1, Mitsuaki Fujimoto, Akira Nakai
1Department of Biochemistry and Molecular Biology; Yamaguchi University School of Medicine; Minami-Kogushi, Ube Japan.
Transcription
|April 7, 2011
Summary
Mammalian heat shock factor 1 (HSF1) regulates protein aggregation by controlling protein degradation, not just protein folding. This discovery reveals a new mechanism for managing cellular proteostasis.
Area of Science:
- Molecular Biology
- Cellular Stress Response
- Protein Homeostasis
Background:
- The heat shock response (HSR) is known to involve heat shock proteins (HSPs) that prevent protein aggregation via enhanced protein folding.
- Heat shock factor 1 (HSF1) is the primary regulator of HSP gene expression during cellular stress.
Purpose of the Study:
- To investigate novel roles of HSF1 beyond its canonical function in regulating HSPs.
- To identify new mechanisms by which HSF1 controls protein aggregation.
Main Methods:
- Analysis of HSF1-regulated genes involved in protein degradation pathways.
- Investigating the interaction between HSF1 and other transcription factors, such as NFAT.
- Assessing the impact of HSF1 and NFAT on protein aggregation under stress conditions.
Main Results:
- HSF1 regulates non-HSP genes that suppress protein aggregation.
- HSF1 cooperates with the transcription factor NFAT to control protein degradation.
- This HSF1-NFAT pathway modulates protein aggregation independently of protein folding.
Conclusions:
- HSF1 has a dual role in managing protein aggregation, involving both protein folding (via HSPs) and protein degradation (via non-HSP genes).
- The HSF1-NFAT interaction presents a new therapeutic target for diseases associated with protein aggregation disorders.
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