title: [Changes in heat shock protein synthesis and thermotolerance of Arabidopsis thaliana seedlings as a result of inhibition of Hsp90 by geldanamycin].
abstract: The influence of geldanamycin (GA), which is a specific inhibitor of heat shock protein Hsp90 activities, on synthesis of Hsp70 and Hsp90 and thermotolerance of Arabidopsis thaliana seedlings has been studied. Incubation of seedlings with GA was shown to induce synthesis of these stress proteins under normal conditions. Treatment of seeds with the Hsp90 inhibitor resulted in the elevated constitutive levels of Hsp70 and Hsp90 in seedlings as well as increased induction of their synthesis under heat shock, at that the effect of GA increased with its concentration. These up-regulation of Hsp promoted thermotolerance of seedlings. The obtained results are considered as evidence for autoregulation of heat shock protein synthesis and regulation of plant tolerance by Hsp90.
authors.forename: L G
authors.initials: LG
authors.lastname: Kozeko
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics; D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism; D016227:Benzoquinones / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D018506:Gene Expression Regulation, Plant; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics* / Q000378:metabolism; D018841:HSP90 Heat-Shock Proteins / Q000819:agonists / Q000235:genetics* / Q000378:metabolism; D018869:Heat-Shock Response / Q000235:genetics; D006358:Hot Temperature; D047029:Lactams, Macrocyclic / Q000494:pharmacology*; D036226:Seedlings / Q000235:genetics* / Q000378:metabolism; D015398:Signal Transduction
chemical_list: D016227:Benzoquinones; D018840:HSP70 Heat-Shock Proteins; D018841:HSP90 Heat-Shock Proteins; D047029:Lactams, Macrocyclic; C001277:geldanamycin