title: Effects of 5-O-Ribosylation of Aminoglycosides on Antimicrobial Activity and Selective Perturbation of Bacterial Translation.
abstract: We studied six pairs of aminoglycosides and their corresponding ribosylated derivatives synthesized by attaching a β-O-linked ribofuranose to the 5-OH of the deoxystreptamine ring of the parent pseudo-oligosaccharide antibiotic. Ribosylation of the 4,6-disubstituted 2-deoxystreptamine aminoglycoside kanamycin B led to improved selectivity for inhibition of prokaryotic relative to cytosolic eukaryotic in vitro translation. For the pseudodisaccharide aminoglycoside scaffolds neamine and nebramine, ribosylated derivatives were both more potent antimicrobials and more selective to inhibition of prokaryotic translation. On the basis of the results of this study, we suggest that modification of the 5-OH position of the streptamine ring of other natural or semisynthetic pseudodisaccharide aminoglycoside scaffolds containing an equatorial amine at the 2' sugar position with a β-O-linked ribofuranose is a promising avenue for the development of novel aminoglycoside antibiotics with improved efficacy and reduced toxicity.
authors: School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University , Tel Aviv 6997801, Israel.
authors: Ido M
authors: IM
authors: Herzog
authors: School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University , Tel Aviv 6997801, Israel.
authors: Sivan
authors: S
authors: Louzoun Zada
authors: School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University , Tel Aviv 6997801, Israel.
authors: Micha
authors: M
authors: Fridman
mesh_terms: D000617:Aminoglycosides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D029968:Escherichia coli Proteins / Q000037:antagonists & inhibitors* / Q000096:biosynthesis; D005601:Framycetin / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000378:metabolism; D007612:Kanamycin / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D012266:Ribose / Q000737:chemistry*; D013329:Structure-Activity Relationship; D014312:Trisaccharides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D029968:Escherichia coli Proteins; D014312:Trisaccharides; C001495:bekanamycin; D005601:Framycetin; D007612:Kanamycin; C488396:neamine; D012266:Ribose