Title

Human SWI/SNF nucleosome remodeling activity is partially inhibited by linker histone H1

UMMS Affiliation

Department of Cell Biology

Date

9-20-2000

Document Type

Article

Medical Subject Headings

Animals; Chickens; Chromatin; DNA; DNA Helicases; DNA-Binding Proteins; purification; Deoxyribonuclease I; Deoxyribonucleases, Type II Site-Specific; Hela Cells; Histones; Humans; *Nuclear Proteins; Nucleosomes; Time Factors; Transcription Factors; purification

Disciplines

Cell Biology

Abstract

The physical structure and the compact nature of the eukaryotic genome present a functional barrier for any cellular process that requires access to the DNA. The linker histone H1 is intrinsically involved in both the determination of and the stability of higher order chromatin structure. Because histone H1 plays a pivotal role in the structure of chromatin, we investigated the effect of histone H1 on the nucleosome remodeling activity of human SWI/SNF, an ATP-dependent chromatin remodeling complex. The results from both DNase I digestion and restriction endonuclease accessibility assays indicate that the presence of H1 partially inhibits the nucleosome remodeling activity of hSWI/SNF. Neither H1 bound to the nucleosome nor free H1 affected the ATPase activity of hSWI/SNF, suggesting that the observed inhibition of hSWI/SNF nucleosome remodeling activity depends on the structure formed by the addition of H1 to nucleosomes.

Rights and Permissions

Citation: Biochemistry. 2000 Sep 26;39(38):11649-56.

Related Resources

Link to Article in PubMed