Download MendeleyStructural insights into selective histone H3 recognition by the human Polybromo bromodomain 2.
Charlop-Powers, Z., Zeng, L., Zhang, Q., Zhou, M.M.(2010) Cell Res 20: 529-538
- PubMed: 20368734
- DOI: https://doi.org/10.1038/cr.2010.43
- Primary Citation of Related Structures:
2KTB, 3LJW - PubMed Abstract:
The Polybromo (PB) protein functions as a key component of the human PBAF chromatin remodeling complex in regulation of gene transcription. PB is made up of modular domains including six bromodomains that are known as acetyl-lysine binding domains. However, histone-binding specificity of the bromodomains of PB has remained elusive. In this study, we report biochemical characterization of all six PB bromodomains' binding to a suite of lysine-acetylated peptides derived from known acetylation sites on human core histones. We demonstrate that bromodomain 2 of PB preferentially recognizes acetylated lysine 14 of histone H3 (H3K14ac), a post-translational mark known for gene transcriptional activation. We further describe the molecular basis of the selective H3K14ac recognition of bromodomain 2 by solving the protein structures in both the free and bound forms using X-ray crystallography and NMR, respectively.
Organizational Affiliation:
Department of Structural and Chemical Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, Box 1677, New York, NY 10029, USA.
