title: The structure of nucleosomal core particles within transcribed and repressed gene regions.
abstract: The arrangement of histones along DNA in nucleosomal core particles within transcribed heat shock gene (hsp 70) region and repressed insertion within ribosomal genes of Drosophila was analysed by using protein-DNA crosslinking methods combined with hybridization tests. In addition, two-dimensional gel electrophoresis was employed to compare the overall nucleosomal shape and the nucleosomal DNA size. The arrangement of histones along DNA and general compactness of nucleosomes were shown to be rather similar in transcriptionally active and inactive genomic regions. On the other hand, nucleosomes within transcriptionally active chromatin are characterized by a larger size of nucleosomal DNA produced by micrococcal nuclease digestion and some peculiarity in electrophoretic mobility.
authors.affiliation: Institute of Molecular Biology, USSR Academy of Sciences, Moscow.
authors.forename: V M
authors.initials: VM
authors.lastname: Studitsky
authors.forename: A V
authors.initials: AV
authors.lastname: Belyavsky
authors.forename: A F
authors.initials: AF
authors.lastname: Melnikova
authors.forename: A D
authors.initials: AD
authors.lastname: Mirzabekov
mesh_terms: D000818:Animals; D002843:Chromatin / Q000302:isolation & purification*; D003850:Deoxyribonuclease I; D004331:Drosophila melanogaster; D006360:Heat-Shock Proteins / Q000235:genetics / Q000302:isolation & purification; D006657:Histones / Q000302:isolation & purification; D008836:Micrococcal Nuclease; D009693:Nucleic Acid Hybridization; D009707:Nucleosomes / Q000032:analysis*; D012097:Repressor Proteins / Q000235:genetics* / Q000302:isolation & purification; D014157:Transcription Factors / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D006360:Heat-Shock Proteins; D006657:Histones; D009707:Nucleosomes; D012097:Repressor Proteins; D014157:Transcription Factors; D003850:Deoxyribonuclease I; D008836:Micrococcal Nuclease