PCR-based identification of microcystin-producing genotypes of different cyanobacterial genera |
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Authors: | Michael?Hisbergues Guntram?Christiansen Leo?Rouhiainen Kaarina?Sivonen Email author" target="_blank">Thomas?B?rnerEmail author |
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Institution: | (1) Department of Biology (Genetics), Humboldt University, Chausseestrasse 117, 10115 Berlin, Germany;(2) Department of Applied Chemistry and Microbiology, Helsinki University, Biocenter Viikki, P. O. Box 56, 00014 Helsinki, Finland;(3) Present address: Institute for Biology of Lille, Department of Microbiology of Ecosystems, 1 rue du Professeur Calmette, 59019 Lille cedex, France |
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Abstract: | Microcystins are harmful hepatotoxins produced by many, but not all strains of the cyanobacterial genera Anabaena, Microcystis, Anabaena, Planktothrix, and Nostoc. Waterbodies have to be monitored for the mass development of toxic cyanobacteria; however, because of the close genetic relationship of microcystin-producing and non-producing strains within a genus, identification of microcystin-producers by morphological criteria is not possible. The genomes of microcystin-producing cells contain mcy genes coding for the microcystin synthetase complex. Based on the sequence information of mcy genes from Microcystis and Planktothrix, a primer pair for PCR amplification of a mcyA gene fragment was designed. PCR with this primer pair is a powerful means to identify microcystin-producing strains of the genera Anabaena, Microcystis, and Planktothrix. Moreover, subsequent RFLP analysis of the PCR products generated genus-specific fragments and allowed the genus of the toxin producer to be identified. The assay can be used with DNA from field samples.Abbreviations
RFLP
Restriction fragment length polymorphism
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MALDI-TOF
Matrix-assisted laser desorption/ionization-time of flight spectrometry
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HPLC
High performance liquid chromatography |
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Keywords: | Anabaena Cyanobacteria Microcystin Microcystis Nostoc Nodularia Peptide synthetase Planktothrix Toxin |
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