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Duality in bromodomain-containing protein complexes
1Cancer Research Center, Boston University School of Medicine, Room L910, 80 East Concord Street, Boston, MA, USA 02118, USA. gdenis@bu.edu
Frontiers in Bioscience : a Journal and Virtual Library
|August 7, 2001
Summary
Bromodomain proteins regulate gene activity by binding to acetylated lysine residues on histones. This interaction anchors enzymatic functions, influencing diverse chromatin-directed processes like transcription and gene regulation.
Area of Science:
- Molecular Biology
- Epigenetics
- Protein Structure
Background:
- Bromodomains are protein motifs crucial for transcriptional regulation.
- The bromodomain of p/CAF is the only one with a solved solution structure.
- Bromodomains bind N-acetyl-lysine, suggesting a role in anchoring enzymatic functions to chromatin.
Purpose of the Study:
- To elucidate the structural basis of bromodomain function.
- To understand how bromodomains mediate interactions with chromatin.
- To explore the diverse roles of bromodomain-containing complexes in gene regulation.
Main Methods:
- Solution structure determination of the p/CAF bromodomain.
- Biochemical assays to assess binding to N-acetyl-lysine.
- Analysis of associated enzymatic activities within bromodomain complexes.
Main Results:
- The p/CAF bromodomain structure reveals binding to N-acetyl-lysine.
- This binding is proposed to anchor enzymatic functions to histones and chromatin.
- Bromodomain-containing complexes exhibit diverse chromatin-directed activities.
Conclusions:
- Bromodomains are key mediators of chromatin-based gene regulation.
- Their ability to bind acetylated lysine allows for versatile recruitment of enzymatic functions.
- These complexes facilitate rapid and flexible transcriptional responses.