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Cyclopiazonic acid (α-CPA), a mycotoxin and a fungal neurotoxin, is made by the molds Aspergillus and Penicillium. It is an indole-tetramic acid that serves as a toxin due to its ability to inhibit calcium-dependent ATPases found in the endoplasmic and sarcoplasmic reticulum. This inhibition disrupts the muscle contraction-relaxation cycle and the calcium gradient that is maintained for proper cellular activity in cells.

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  • Cyclopiazonic acid (en)
  • Ácido ciclopiazônico (pt)
  • Циклопиазоновая кислота (ru)
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  • O ácido ciclopiazônico (CPA) é um metabólito secundário fúngico tóxico. Quimicamente é um indol de ácido tetrâmico. O CPA foi originalmente isolado do fungo Penicillium cyclopium e subsequentemente de outros fungos como Penicillium griseofulvum, Penicillium camemberti, Penicillium commune, Aspergillus flavus, e Aspergillus versicolor. O CPA é tóxico apenas em altas concentrações. Biologicamente, o CPA é um inibidor específico de Ca2+-ATPase nos locais de armazenamento de Ca2+ intracelulares. (pt)
  • Циклопиазоновая кислота (ЦПК) - токсичный грибковый вторичный метаболит. Химически, ЦПК близка к эрголиновым алкалоидам. Впервые ЦПК была выделена из Penicillium cyclopium и впоследствии из других грибов, в том числе: Penicillium griseofulvum, Penicillium camemberti, Penicillium commune, Aspergilus flavus и Aspergillus versicolor. ЦПК проявляет токсичность только в высоких концентрациях. Токсический эффект ЦПК обусловлен ингибированием SERCA Ca2+-АТФаз внутриклеточных компартментов (ЭПР, везикулы и др.). (ru)
  • Cyclopiazonic acid (α-CPA), a mycotoxin and a fungal neurotoxin, is made by the molds Aspergillus and Penicillium. It is an indole-tetramic acid that serves as a toxin due to its ability to inhibit calcium-dependent ATPases found in the endoplasmic and sarcoplasmic reticulum. This inhibition disrupts the muscle contraction-relaxation cycle and the calcium gradient that is maintained for proper cellular activity in cells. (en)
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