title: Functional delineation of three groups of the ATP-dependent family of chromatin remodeling enzymes.
abstract: ATP-dependent chromatin remodeling enzymes antagonize the inhibitory effects of chromatin. We compare six different remodeling complexes: ySWI/SNF, yRSC, hSWI/SNF, xMi-2, dCHRAC, and dNURF. We find that each complex uses similar amounts of ATP to remodel nucleosomal arrays at nearly identical rates. We also perform assays with arrays reconstituted with hyperacetylated or trypsinized histones and isolated histone (H3/H4)(2) tetramers. The results define three groups of the ATP-dependent family of remodeling enzymes. In addition we investigate the ability of an acidic activator to recruit remodeling complexes to nucleosomal arrays. We propose that ATP-dependent chromatin remodeling enzymes share a common reaction mechanism and that a key distinction between complexes is in their mode of regulation or recruitment.
authors.affiliation: Program in Molecular Medicine and Department of Biochemistry and Molecular Biology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.
authors.forename: L A
authors.initials: LA
authors.lastname: Boyer
authors.forename: C
authors.initials: C
authors.lastname: Logie
authors.forename: E
authors.initials: E
authors.lastname: Bonte
authors.forename: P B
authors.initials: PB
authors.lastname: Becker
authors.forename: P A
authors.initials: PA
authors.lastname: Wade
authors.forename: A P
authors.initials: AP
authors.lastname: Wolffe
authors.forename: C
authors.initials: C
authors.lastname: Wu
authors.forename: A N
authors.initials: AN
authors.lastname: Imbalzano
authors.forename: C L
authors.initials: CL
authors.lastname: Peterson
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000378:metabolism*; D002843:Chromatin / Q000737:chemistry / Q000378:metabolism*; D007700:Kinetics; D011487:Protein Conformation; D015534:Trans-Activators / Q000378:metabolism
chemical_list: D002843:Chromatin; D015534:Trans-Activators; D000255:Adenosine Triphosphate; D000251:Adenosine Triphosphatases