Download MendeleyStructure and histone binding properties of the Vps75-Rtt109 chaperone-lysine acetyltransferase complex.
Su, D., Hu, Q., Zhou, H., Thompson, J.R., Xu, R.M., Zhang, Z., Mer, G.(2011) J Biol Chem 286: 15625-15629
- PubMed: 21454705
- DOI: https://doi.org/10.1074/jbc.C111.220715
- Primary Citation of Related Structures:
3Q66, 3Q68 - PubMed Abstract:
The histone chaperone Vps75 presents the remarkable property of stimulating the Rtt109-dependent acetylation of several histone H3 lysine residues within (H3-H4)(2) tetramers. To investigate this activation mechanism, we determined x-ray structures of full-length Vps75 in complex with full-length Rtt109 in two crystal forms. Both structures show similar asymmetric assemblies of a Vps75 dimer bound to an Rtt109 monomer. In the Vps75-Rtt109 complexes, the catalytic site of Rtt109 is confined to an enclosed space that can accommodate the N-terminal tail of histone H3 in (H3-H4)(2). Investigation of Vps75-Rtt109-(H3-H4)(2) and Vps75-(H3-H4)(2) complexes by NMR spectroscopy-probed hydrogen/deuterium exchange suggests that Vps75 guides histone H3 in the catalytic enclosure. These findings clarify the basis for the enhanced acetylation of histone H3 tail residues by Vps75-Rtt109.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA.
