Peptide toxin components of Amanita exitialis basidiocarps.

Wang-Qiu Deng, Tai-Hui Li, Ping-Gen Xi, Li-Xia Gan, Zheng-Duan Xiao, Zi-De Jiang

Guangdong Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Guangzhou, China.

Mycologia 2011 Sep-Oct

filter terms:

Eight peptide toxins were isolated and purified from basidiocarps of Amanita exitialis with high performance liquid chromatography and were subjected to ultraviolet, nuclear magnetic resonance and mass spectrometry. We identified seven peptide toxins, α-amanitin, β-amanitin, amaninamide, phallacin, phallacidin, phallisacin and desoxoviroidin. The molecular weight (729.5 Da) of the eighth compound did not match that of any reported Amanita toxins and, although the UV absorption spectrum indicated it to be a phallotoxin, further studies are required to identify this component. This is the first report of amaninamide, phallacin, phallisacin and desoxoviroidin in this lethal mushroom species.

Citation

Wang-Qiu Deng, Tai-Hui Li, Ping-Gen Xi, Li-Xia Gan, Zheng-Duan Xiao, Zi-De Jiang. Peptide toxin components of Amanita exitialis basidiocarps. Mycologia. 2011 Sep-Oct;103(5):946-9