title: Identification of a site on 18 S rRNA of human placenta ribosomes in the region of the mRNA binding center.
abstract: The affinity labeling of human placenta 80 S ribosomes by 4-(N-2-chloroethyl-N-methylamino)benzyl-5'-phosphamide of hexauridylate was studied. This mRNA analog has normal coding properties because its binding to placenta ribosomes significantly increases in the presence of cognate tRNAPhe. Incubation of the mRNA analog in the complex with the ribosomes and Phe-tRNAPhe leads to its covalent attachment exclusively to the small subunit (mainly to 18 S rRNA). The site of the reaction has been identified by hybridization experiments to be located within positions 975 to 1055 of 18 S rRNA. The identified fragment is located in a highly conserved part of the small subunit rRNA domain II.
authors.affiliation: Institute of Bioorganic Chemistry, Siberian Division of the Academy of Sciences of the USSR, Novosibirsk.
authors.forename: D M
authors.initials: DM
authors.lastname: Graifer
authors.forename: M A
authors.initials: MA
authors.lastname: Zenkova
authors.forename: A A
authors.initials: AA
authors.lastname: Malygin
authors.forename: S V
authors.initials: SV
authors.lastname: Mamaev
authors.forename: D A
authors.initials: DA
authors.lastname: Mundus
authors.forename: G G
authors.initials: GG
authors.lastname: Karpova
mesh_terms: D000345:Affinity Labels; D001483:Base Sequence; D001665:Binding Sites; D005260:Female; D006801:Humans; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D009943:Organophosphorus Compounds; D010761:Phosphorus Radioisotopes; D010920:Placenta; D011247:Pregnancy; D012333:RNA, Messenger / Q000378:metabolism; D012335:RNA, Ribosomal / Q000378:metabolism*; D012337:RNA, Ribosomal, 18S / Q000302:isolation & purification / Q000378:metabolism*; D012360:RNA, Transfer, Phe / Q000378:metabolism; D012270:Ribosomes / Q000378:metabolism*; D014500:Uracil Nucleotides
chemical_list: D000345:Affinity Labels; D009943:Organophosphorus Compounds; D010761:Phosphorus Radioisotopes; D012333:RNA, Messenger; D012335:RNA, Ribosomal; D012337:RNA, Ribosomal, 18S; D012360:RNA, Transfer, Phe; D014500:Uracil Nucleotides; C064973:4-(N-2-chloroethyl-N-methylamino)-benzylphosphamide hexauridylate