title: [Affinity modification of 80S ribosomes from human placenta by derivatives of tri- and hexauridylates as mRNA analogs].
abstract: Derivatives of 5'-32P]labeled (pU)3 and (pU)6 bearing 4-(N-2-chloroethyl-N-methylamino)benzylmethylamine residues attached to 5'-phosphates via phosphamide bond were applied to the affinity labeling of 80S ribosomes from human placenta. The reagents had normal coding properties and were fixed in the ribosomal mRNA-binding region by codon-anticodon interaction with cognate Phe-tRNA(Rhe) at P site (in the case of (pU)3 derivative) or at both A and P sites (in the case of (pU)6 one). Both reagents were found to modify only the 40S subunit. The sites of the reagents attachment to 18S ribosomal RNA were identified by blot-hybridization of the modified 18S rRNA with restriction fragments of the corresponding rDNA. They were found to be located within positions 976-1057 for (pU)6 derivative and within 976-1164 for (pU)3 one. These sites are located presumably within highly conserved parts of the eukaryotic small subunit rRNA secondary structure.
authors.forename: A A
authors.initials: AA
authors.lastname: Malygin
authors.forename: D M
authors.initials: DM
authors.lastname: Graĭfer
authors.forename: M A
authors.initials: MA
authors.lastname: Zenkova
authors.forename: S V
authors.initials: SV
authors.lastname: Mamaev
authors.forename: G G
authors.initials: GG
authors.lastname: Karpova
mesh_terms: D000477:Alkylating Agents / Q000378:metabolism; D001665:Binding Sites; D005260:Female; D006801:Humans; D009690:Nucleic Acid Conformation; D010920:Placenta / Q000737:chemistry*; D011247:Pregnancy; D012333:RNA, Messenger / Q000737:chemistry*; D012335:RNA, Ribosomal / Q000737:chemistry / Q000378:metabolism; D012270:Ribosomes / Q000737:chemistry* / Q000378:metabolism; D014542:Uridine Monophosphate / Q000031:analogs & derivatives / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000477:Alkylating Agents; D012333:RNA, Messenger; D012335:RNA, Ribosomal; D014542:Uridine Monophosphate
vernacular_title: Affinnaia modifikatsiia 80S ribosom iz platsenty cheloveka proizvodnymi tri- i geksauridilatov v kachestve analogov mRNK.