title: Nucleosome binding properties and Co-remodeling activities of native and in vivo acetylated HMGB-1 and HMGB-2 proteins.
abstract: The participation of HMGB-1 and -2 proteins in chromatin remodeling is investigated. Here, the ability of these proteins and their posttranslationally acetylated forms to affect SWI/SNF and RSC-dependent nucleosome mobilization was studied. Both proteins assisted nucleosome sliding induced by the two remodelers. Following acetylation, these proteins acquire the ability to bind to core particles, a property that has not yet been documented with parental proteins. We further report that compared to the nonmodified proteins, acetylated HMGB-1 and -2 exhibited both stronger binding to linker DNA-containing nucleosomes and a higher co-remodeling activity. Acetylation of HMGB-1 and -2 proteins enhanced binding of SWI/SNF to the nucleosome but did not affect its ATPase activity.
authors.affiliation: Institute of Molecular Biology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Iva
authors.initials: I
authors.lastname: Ugrinova
authors.forename: Iliya G
authors.initials: IG
authors.lastname: Pashev
authors.forename: Evdokia A
authors.initials: EA
authors.lastname: Pasheva
mesh_terms: D000107:Acetylation; D001483:Base Sequence; D017931:DNA Primers; D024202:Electrophoretic Mobility Shift Assay; D024243:HMGB1 Protein / Q000378:metabolism*; D024261:HMGB2 Protein / Q000378:metabolism*; D009707:Nucleosomes / Q000378:metabolism*; D011485:Protein Binding
chemical_list: D017931:DNA Primers; D024243:HMGB1 Protein; D024261:HMGB2 Protein; D009707:Nucleosomes