title: [The use of RNAse H for digestion of alkylated 16S rRNA at the binding sites of addressed reagents--oligodeoxyribonucleotide derivatives].
abstract: It is demonstrated that 16S rRNA, complementary-addressed labelled with 2',3'-O-[4-N-methyl-N-(2-chloroethyl)-amino]benzylidene derivatives of oligonucleotides d(pACCTTGTT)rA and d(pTTTGCTCCCC)rA, can be cleaved by RNase H within the adducts, resulted from the modification. Comparative study of the 16S rRNA cleavage with RNase H within the above--mentioned covalent adducts, on the one hand, and within heteroduplexes with the same oligodeoxyribonucleotides, on the other, showed that(i) the complementary-addressed modification proceeds both in perfect and non-per ect complexes; (ii) 16S rRNA is cleaved by RNase H within both perfect and non-perfect complexes resulted from the alkylation, non-perfect complexes being considerably stabilized by the covalent bond between the reagent and the RNA; (iii) non-perfect complexes of 16S rRNA with the free oligodeoxyribonucleotides are unstable even at the high oligonucleotide concentration, so that no cleavage of 16S rRNA in such duplexes is observed. The approach based on cleavage of RNA within covalent adducts resulted from the complementary-addressed RNA modification may be used for fragmentation of RNA molecule in the addressed reagent's binding site.
authors.forename: M A
authors.initials: MA
authors.lastname: Zenkova
authors.forename: G G
authors.initials: GG
authors.lastname: Karpova
authors.forename: A S
authors.initials: AS
authors.lastname: Levina
mesh_terms: D000478:Alkylation; D001483:Base Sequence; D001597:Benzylidene Compounds; D001665:Binding Sites; D004722:Endoribonucleases / Q000378:metabolism*; D006868:Hydrolysis; D007202:Indicators and Reagents; D007700:Kinetics; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000378:metabolism*; D016914:Ribonuclease H
chemical_list: D001597:Benzylidene Compounds; D007202:Indicators and Reagents; D009838:Oligodeoxyribonucleotides; D012336:RNA, Ribosomal, 16S; D004722:Endoribonucleases; D016914:Ribonuclease H
vernacular_title: Rasshcheplenie alkilirovannoĭ 16S rRNK po uchastkam sviazyvaniia adresovannykh reagentov--proizvodnykh oligodezoksiribonukleotidov-- s pomoshch'iu RNKazy H.