title: Binding of [3H]narciclasine to eukaryotic ribosomes. A study on a structure-activity relationship.
abstract: [3H]Narciclasine is a specific inhibitor of peptide bond formation on eukaryotic ribosomes and binds to 60-S ribosomal subunits. Binding of [3H]-narciclasine to yeast ribosomes is inhibited by many other inhibitors of peptide bond formation including anisomycin, several sequiterpene antibiotics (trichodermin, trichothecin, fusarenon X and verrucarin A) several Cephalotaxus alkaloids (harringtonine, homoharringtonine and isoharringtonine), several Amaryllidaceae alkaloids (pretazettine, haemanthamine, lycorine, pseudolycorine and dihydrolycorine) and the narciclasine derivatives trans-dihydronarciclasine, trans-dihydronarciclasine acetonide and isonarciclasine. Binding is also inhibited, although to a very small extent, by methylnarciclasine and cisdihydronarciclasine. In contrast, no inhibition of [3H]narciclasine binding was observed in the presence of certain other inhibitors of peptide bond formation including blasticidin S, gougerotin, sparsomycin and puromycin.
mesh_terms: D000470:Alkaloids / Q000378:metabolism*; D047151:Amaryllidaceae Alkaloids; D000900:Anti-Bacterial Agents / Q000378:metabolism; D007700:Kinetics; D010617:Phenanthridines; D010944:Plants; D012270:Ribosomes / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D013329:Structure-Activity Relationship
chemical_list: D000470:Alkaloids; D047151:Amaryllidaceae Alkaloids; D000900:Anti-Bacterial Agents; D010617:Phenanthridines; C010753:narciclasine