RSC remodeling of oligo-nucleosomes: an atomic force microscopy study
RSC remodeling of oligo-nucleosomes: an atomic force microscopy study
RSC is an essential chromatin remodeling factor that is required for the control of several processes including transcription, repair and replication. The ability of RSC to relocate centrally positioned mononucleosomes at the end of nucleosomal DNA is firmly established, but the data on RSC action on oligo-nucleosomal templates remains still scarce. By using Atomic Force Microscopy (AFM) imaging, we have quantitatively studied the RSC- induced mobilization of positioned di- and trinucleosomes as well as the directionality of mobilization on mononucleosomal template labeled at one end with streptavidin. AFM imaging showed only a limited set of distinct configurational states for the remodeling products. No stepwise or preferred directionality of the nucleosome motion was observed. Analysis of the corresponding reaction pathways allows deciphering the mechanistic features of RSC-induced nucleosome relocation. The final outcome of RSC remodeling of oligosome templates is the packing of the nucleosomes at the edge of the template, providing large stretches of DNA depleted of nucleosomes. This feature of RSC may be used by the cell to overcome the barrier imposed by the presence of nucleosomes.
Quantitative Biology - Subcellular Processes, Saccharomyces cerevisiae Proteins, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], [SDV.BBM.BP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, FOS: Physical sciences, Dinucleosomes, Gene Regulation, Chromatin and Epigenetics, Microscopy, Atomic Force, 530, Physics - Biological Physics, RSC, Subcellular Processes (q-bio.SC), PHYS:PHYS:PHYS_BIO-PH, [PHYS.PHYS.PHYS-BIO-PH] Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], AFM;RSC;Chromatin;Remodeling;Dinucleosomes, [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, DNA, 540, Chromatin Assembly and Disassembly, Chromatin, Remodeling, Nucleosomes, DNA-Binding Proteins, SDV:BBM:BP, Biological Physics (physics.bio-ph), FOS: Biological sciences, AFM, Molecular Biology/Biophysics, Transcription Factors
Quantitative Biology - Subcellular Processes, Saccharomyces cerevisiae Proteins, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], [SDV.BBM.BP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, FOS: Physical sciences, Dinucleosomes, Gene Regulation, Chromatin and Epigenetics, Microscopy, Atomic Force, 530, Physics - Biological Physics, RSC, Subcellular Processes (q-bio.SC), PHYS:PHYS:PHYS_BIO-PH, [PHYS.PHYS.PHYS-BIO-PH] Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], AFM;RSC;Chromatin;Remodeling;Dinucleosomes, [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, DNA, 540, Chromatin Assembly and Disassembly, Chromatin, Remodeling, Nucleosomes, DNA-Binding Proteins, SDV:BBM:BP, Biological Physics (physics.bio-ph), FOS: Biological sciences, AFM, Molecular Biology/Biophysics, Transcription Factors
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