Merck, R2146-5MG, Radicicol from Diheterospora chlamydosporia

Application
Radicicol from Diheterospora chlamydosporia has been used as an inhibitor of heat shock protein 90 (Hsp90):
to study its effects on lifespan extension and health in Caenorhabditis elegans
to study its effects on protein aggregation in yeast
to study its effects on xanthone sensitized cancer cells

Biochem/physiol Actions
Radicicol is an antifungal macrolactone antibiotic that is found in Diheterospora chlamydosporia, Chaetomium chiversii, and Monosporium bonorden. It functions as an inhibitor of tyrosine kinase and heat shock protein 90 (Hsp90). Radicicol is involved in the suppression of transformation of various proto-oncogenes such as Ras, Mos, and Src. It also suppresses the activity of mitogen-induced cyclooxygenase-2 (COX-2) and phosphoinositide-dependent kinase 1 (PDK1). Radicicol is involved in arresting the cell cycle at the G1-S phase. It exhibits ant-cancer and anti-angiogenic activity in vivo.
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