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Bromodomain: an acetyl-lysine binding domain.

Lei Zeng1, Ming Ming Zhou

  • 1Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York University, 1425 Madison Avenue, P.O. Box 1677, New York, NY 10029-6574, USA.

FEBS Letters
|March 26, 2002
PubMed
Summary

Bromodomains are protein modules that bind acetyl-lysine, crucial for gene regulation. Structural studies reveal how their ligand selectivity drives diverse cellular functions through evolution.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Epigenetics

Background:

  • Bromodomains are conserved protein modules found in chromatin-associated proteins and histone acetyltransferases.
  • They function as acetyl-lysine binding domains, mediating interactions in nuclear processes.
  • Understanding bromodomain ligand selectivity is key to deciphering their regulatory roles.

Purpose of the Study:

  • To elucidate the structural basis of bromodomain/acetyl-lysine recognition.
  • To explore how variations in bromodomain structure contribute to functional diversity.
  • To highlight the role of bromodomain interactions in chromatin remodeling and transcription.

Main Methods:

  • Structural studies of bromodomain/peptide ligand complexes.
  • Analysis of evolutionary changes in amino acid sequences within ligand binding sites.

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Main Results:

  • Bromodomains specifically recognize acetyl-lysine residues.
  • Structural data reveals distinct ligand selectivity profiles among different bromodomains.
  • Evolutionary sequence modifications in binding sites explain functional diversity.

Conclusions:

  • Bromodomain/acetyl-lysine recognition is a critical mechanism for regulating protein-protein interactions.
  • These interactions are vital for chromatin remodeling and transcriptional activation.
  • Functional diversity arises from evolutionary adaptations in the bromodomain ligand binding site.