title: Chromatin structure of Drosophila melanogaster ribosomal genes.
abstract: The chromatin structure of ribosomal genes of D. melanogaster has been studied by crosslinking proteins to DNA. We found that a number of histone contacts with DNA through histidine in the approximately 1 kb-long region surrounding the transcription initiation site, coding regions and the region of 240 bp-long repeats from the intergenic spacers (Alu-repeats) were weakened as compared to the inactive chromatin of the type II insertion. A protein with the molecular mass of 50 kDa (p50), associated with all DNA sequences analysed, has been discovered. Another protein with molecular mass of about 70 kDa (p70) has been found to be specific only for the Alu-repeats.
authors.affiliation: W.A. Engelhardt Institute of Molecular Biology, USSR Academy of Sciences, Moscow.
authors.forename: S V
authors.initials: SV
authors.lastname: Belikov
authors.forename: A R
authors.initials: AR
authors.lastname: Dzherbashyajan
authors.forename: O V
authors.initials: OV
authors.lastname: Preobrazhenskaya
authors.forename: V L
authors.initials: VL
authors.lastname: Karpov
authors.forename: A D
authors.initials: AD
authors.lastname: Mirzabekov
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002843:Chromatin / Q000502:physiology / Q000648:ultrastructure*; D004247:DNA / Q000302:isolation & purification / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000235:genetics*; D005796:Genes; D006657:Histones / Q000302:isolation & purification / Q000378:metabolism*; D009693:Nucleic Acid Hybridization; D011485:Protein Binding; D012270:Ribosomes / Q000648:ultrastructure*; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D006657:Histones; D004247:DNA