ATP-dependent histone octamer mobilization and histone deacetylation mediated by the Mi-2 chromatin remodeling complex

Dmitry Guschin, Paul A. Wade, Nobuaki Kikyo, Alan P. Wolffe

Research output: Contribution to journalArticle

73 Scopus citations

Abstract

The Mi-2 complex has been implicated in chromatin remodeling and transcriptional repression associated with histone deacetylation. Here, we use a purified Mi-2 complex containing six components, Mi-2, Mta 1-like, p66, RbAp48, RPD3, and MBD3, to investigate the capacity of this complex to destabilize histone-DNA interactions and deacetylate core histones. The Mi-2 complex has ATPase activity that is stimulated by nucleosomes but not by free histones or DNA. This nucleosomal ATPase is relatively inefficient, yet is essential to facilitate both translational movement of histone octamers relative to DNA and the efficient deacetylation of the core histones within a mononucleosome. Surprisingly, ATPase activity had no effect on deacetylation of nucleosomal arrays.

Original languageEnglish (US)
Pages (from-to)5238-5245
Number of pages8
JournalBiochemistry
Volume39
Issue number18
DOIs
StatePublished - May 9 2000

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