Synthesis and biological evaluation of novel neamine–nucleoside conjugates potentially targeting to RNAs
摘要:
Eighteen novel neamine-nucleoside conjugates with ethylenediamine-lysine or ethylenediamine-arginine as the linker were synthesized and their potential binding to A site of 16S RNA and TAR RNA was evaluated using SPR (surface plasmon resonance). Compared with neamine, compounds 10i and 10q show 6.3 and 4.8 times potential in binding to A site of 16S RNA and eight and six times potential in binding to TAR RNA, respectively. According to the data of SPR, it indicates that amino acid residue and nucleobase moieties of the designed neamine-nucleosides conjugates exhibit the important contributions for the binding to A site of 16S RNA and TAR RNA. The molecular docking Study on the interaction between the ligands and A site of 16S RNA is in agreement with the experimental data. The novel type of modification may provide a promising way for the development of neamine derivatives effectively targeting to RNAs. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of novel neamine derivatives effectively targeting to RNA
摘要:
Three new derivatives of neamine, 3 (NE), 6 (NEA) and 9 (NEL), were synthesized by connecting arginine or lysine to 5-hydroxyl group of neamine using ethylenediamine as a linker. The binding affinities of these derivatives to A site of 16S RNA and TAR RNA indicate that the modi. cation on 5-hydroxyl of neamine by amino acid can enhance the binding affinity of neamine. Compound 9 (NEL) shows some antibacterial activities. These results demonstrate that modi. cation on 5-hydroxyl group of neamine may provide a promising way for the development of potential candidates effectively targeting to RNAs. (C) 2009 Elsevier Ltd. All rights reserved.