Date: 26 November 2013
Secondary metabolites, 3D structure: Trivial name – sterigmatocystin
Copyright: n/a
Notes:
Species: A. discophorus, A. flavus, A. multicolor, A. nidulans, A. olivicola, A. parasiticus, A. rambellii, A. ustus, A. versicolor, Emericella nidulans, Emericella venezuelensisSystematic name: 7H-Furo[3′,2′:4,5]furo[2,3-c]xanthen-7-one, 3a,12c-dihydro-8-hydroxy-6-methoxy-, (3aR,12cS)-Molecular formulae: C18H12O6Molecular weight: 324.284Chemical abstracts number: 10048-13-2Selected references: Steyn M; Rabie C J Production of sterigmatocystin. Journal – Association of Official Analytical Chemists (1975), 58(3), 622-3. Tag, Andrew; Hicks, Julie; Garifullina, Gulnara; Ake, Charles, Jr; Phillips, T. D.; Beremand, Marian; Keller, Nancy (CORPORATE SOURCE Departments of Plant Pathology and Microbiology, Texas A and M University, College Station, TX 77843-2132, USA).Hamasaki, Takashi; Nakagomi, Takeo; Hatsuda, Yuichi; Fukuyama, Keiichi; Katsube, Yukiteru (Fac. Agric., Tottori Univ., Tottori 680, Japan). Agric. Biol. Chem., 44(5), 1149-55 (English) 1980.Frisvad JC, Skouboe P, Samson RA. Taxonomic comparison of three different groups of aflatoxin producers and a new efficient producer of aflatoxin B1, sterigmatocystin and 3-O-methylsterigmatocystin, Aspergillus rambellii sp. nov. Syst Appl Microbiol. 2005 Jul;28(5):442-53. Frisvad JC, Samson RA. Emericella venezuelensis, a new species with stellate ascospores producing sterigmatocystin and aflatoxin B1. Syst Appl Microbiol. 2004 Nov;27(6):672-80.Toxicity: Oral LD50 in albino male rat 166 mg/kg body-weight, intraperitoneal LD50 in male monkeys 32 mg/kg body-weight. It has been shown to cause liver and kidney damage including cirrhosis of the liver in primates. Hsieh DP, Atkinson DN. Bisfuranoid mycotoxins: their genotoxicity and carcinogenicity. Adv Exp Med Biol. 1991;283:525-32. Review. Produced by several Aspergillus spp, including Aspergillus nidulans, Aspergillus flavus, Aspergillus ustus and Aspergillus versicolor, the last of which is associated with the production of sterigmatocystin in cheeses stored at low temperatures for extended periods of time. It is also produced by Bipolaris sorokiniana, Monocillium nordinii, Chaetomium thielarioideum and Chaetomium udagawae.
Images library
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BAL specimen showing hyaline, septate hyphae consistent with Aspergillus, stained with Blankophor
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Mucous plug examined by light microscopy with KOH, showing a network of hyaline branching hyphae typical of Aspergillus, from a patient with ABPA.
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Corneal scraping stained with lactophenol cotton blue showing beaded septate hyphae not typical of either Fusarium spp or Aspergillus spp, being more consistent with a dematiceous (ie brown coloured) fungus
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Corneal scrape with lactophenol cotton blue shows separate hyphae with Fusarium spp or Aspergillus spp.
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A filamentous fungus in the CSF of a patient with meningitis that grew Candida albicans in culture subsequently.
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Transmission electron micrograph of a C. neoformans cell seen in CSF in an AIDS patients with remarkably little capsule present. These cells may be mistaken for lymphocytes.
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India ink preparation of CSF showing multiple yeasts with large capsules, and narrow buds to smaller daughter cells, typical of C. neoformans
