2R10 image
Deposition Date 2007-08-21
Release Date 2007-10-30
Last Version Date 2024-11-13
Entry Detail
PDB ID:
2R10
Keywords:
Title:
Structure of an acetylated Rsc4 tandem bromodomain Histone Chimera
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.24
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Chromatin structure-remodeling complex protein RSC4, LINKER, Histone H3
Gene (Uniprot):RSC4
Mutations:k9(ALY), K25(ALY)
Chain IDs:A, B
Chain Length:361
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ALY A LYS N(6)-ACETYLLYSINE
Ligand Molecules
Primary Citation
Autoregulation of the rsc4 tandem bromodomain by gcn5 acetylation.
Mol.Cell 27 817 828 (2007)
PMID: 17803945 DOI: 10.1016/j.molcel.2007.08.018

Abstact

An important issue for chromatin remodeling complexes is how their bromodomains recognize particular acetylated lysine residues in histones. The Rsc4 subunit of the yeast remodeler RSC contains an essential tandem bromodomain (TBD) that binds acetylated K14 of histone H3 (H3K14ac). We report a series of crystal structures that reveal a compact TBD that binds H3K14ac in the second bromodomain and, remarkably, binds acetylated K25 of Rsc4 itself in the first bromodomain. Endogenous Rsc4 is acetylated only at K25, and Gcn5 is identified as necessary and sufficient for Rsc4 K25 acetylation in vivo and in vitro. Rsc4 K25 acetylation inhibits binding to H3K14ac, and mutation of Rsc4 K25 results in altered growth rates. These data suggest an autoregulatory mechanism in which Gcn5 performs both the activating (H3K14ac) and inhibitory (Rsc4 K25ac) modifications, perhaps to provide temporal regulation. Additional regulatory mechanisms are indicated as H3S10 phosphorylation inhibits Rsc4 binding to H3K14ac peptides.

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Primary Citation of related structures