β-Amanitin, a cyclic peptide toxin found in the poisonous Amanita phalloides mushroom, inhibits eukaryotic RNA polymerase II and III, thereby disrupting protein synthesis.
Fasciculic acid B is the ester of fasciculol B and 3-hydroxy-3-methylglutaric acid. Fasciculic acid B is calmodulin antagonist from mushroom Naematoloma fasciculare.
Cardol triene is a phenol found in cashew nut shell liquid that competitively and irreversibly inhibits mushroom tyrosinase (IC50 = 22.5 μM). It is schistosomicidal, killing 25, 75, and 100% of S. mansoni worms after 24 hours when used at concentrations of 50, 100, or 200 μM, respectively. It has been used as a starting material for the synthesis of bis-benzoxazines.
Endoplasmic reticulum (ER) stress, caused by accumulation of misfolded proteins and a disruption of calcium homeostasis, has been linked to several neuronal diseases including, Parkinson's, Alzheimer's, and prion diseases. A screen for protective activity against ER stress-dependent cell death identified termitomycamides, extracts from the fruiting bodies of T. titanicus, a notably large edible mushroom that is cultivated symbiotically in the nests of termites Termitomycamide B is a fatty acid isolated from T. titanicus that at a dose of 0.1 μg/ml protects against ER stress-dependent cell death in Neuro2a cells induced by tunicamycin.
Ternatin is a cyclic heptapeptide first isolated from the mushroom C. versicolor that has been shown to have cytotoxic and anti-adipogenic effects in vitro. It inhibits adipogenesis with an IC50 value of 27 nM and becomes cytotoxic to 3T3-L1 mouse adipocytes at 10-fold higher concentrations. Ternatin is reported to inhibit HCT116 cell proliferation with an IC50 value of 71 nM. Note that this metabolite should not be confused with the plant flavonoid of the same name.