Toxic and non-toxic strains of the cyanobacterium Microcystis aeruginosa contain sequences homologous to peptide synthetase genes

Abstract Toxic strains of Microcystis aeruginosa produce cyclic heptatoxins (microcystins) that are believed to be synthesized non-ribosomally by peptide synthetases. We analysed toxin-producing and non-toxic strains of M. aeruginosa with respect to the presence of DNA sequences potentially encoding...

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Veröffentlicht in:FEMS microbiology letters 1996-01, Vol.135 (2-3), p.295-303
Hauptverfasser: Meiβner, Kathrin, Dittmann, Elke, Börner, Thomas
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creator Meiβner, Kathrin
Dittmann, Elke
Börner, Thomas
description Abstract Toxic strains of Microcystis aeruginosa produce cyclic heptatoxins (microcystins) that are believed to be synthesized non-ribosomally by peptide synthetases. We analysed toxin-producing and non-toxic strains of M. aeruginosa with respect to the presence of DNA sequences potentially encoding peptide synthetases. Hybridizations of genomic DNA of various M. aeruginosa strains with PCR-amplificated fragments possessing homologies to adenylate-forming domains of peptide synthetase genes provided first evidence for the existence of corresponding genes in cyanobacteria. Furthermore we isolated and sequenced from genomic libraries overlapping fragments of M. aeruginosa DNA with a total length of 2982 bp showing significant homology to genes encoding peptide synthetases and hybridizing exclusively with DNA from toxic strains. Our results indicate that both toxic and non-toxic strains of M. aeruginosa possess genes coding for peptide synthetases and that hepatotoxin-producing and non-toxic strains differ in their content of genes for specific peptide synthetases.
doi_str_mv 10.1111/j.1574-6968.1996.tb08004.x
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Our results indicate that both toxic and non-toxic strains of M. aeruginosa possess genes coding for peptide synthetases and that hepatotoxin-producing and non-toxic strains differ in their content of genes for specific peptide synthetases.</description><identifier>ISSN: 0378-1097</identifier><identifier>EISSN: 1574-6968</identifier><identifier>DOI: 10.1111/j.1574-6968.1996.tb08004.x</identifier><identifier>PMID: 8595871</identifier><identifier>CODEN: FMLED7</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Amino Acid Sequence ; Bacterial Proteins - chemistry ; Bacterial Proteins - genetics ; Bacterial Toxins ; Bacteriology ; Base Sequence ; Biological and medical sciences ; Conserved Sequence - genetics ; Cyanobacteria ; Cyanophyta ; Deoxyribonucleic acid ; DNA ; DNA, Bacterial - analysis ; DNA, Bacterial - genetics ; Domains ; Fragments ; Freshwater ; Fundamental and applied biological sciences. Psychology ; Gene sequencing ; Genes ; Genes, Bacterial - genetics ; Genetics ; Hepatotoxicity ; Homology ; Microbiology ; Microcysti ; Microcystins ; Microcystis ; Microcystis - enzymology ; Microcystis - genetics ; Microcystis aeruginosa ; Molecular Sequence Data ; Nucleic Acid Hybridization ; Nucleotide sequence ; Peptide Synthases - genetics ; Peptide synthetase ; Peptides ; Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid ; Toxins</subject><ispartof>FEMS microbiology letters, 1996-01, Vol.135 (2-3), p.295-303</ispartof><rights>1996 Federation of European Microbiological Societies. All rights reserved 1996</rights><rights>1996 INIST-CNRS</rights><rights>1996 Federation of European Microbiological Societies. 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We analysed toxin-producing and non-toxic strains of M. aeruginosa with respect to the presence of DNA sequences potentially encoding peptide synthetases. Hybridizations of genomic DNA of various M. aeruginosa strains with PCR-amplificated fragments possessing homologies to adenylate-forming domains of peptide synthetase genes provided first evidence for the existence of corresponding genes in cyanobacteria. Furthermore we isolated and sequenced from genomic libraries overlapping fragments of M. aeruginosa DNA with a total length of 2982 bp showing significant homology to genes encoding peptide synthetases and hybridizing exclusively with DNA from toxic strains. Our results indicate that both toxic and non-toxic strains of M. aeruginosa possess genes coding for peptide synthetases and that hepatotoxin-producing and non-toxic strains differ in their content of genes for specific peptide synthetases.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>8595871</pmid><doi>10.1111/j.1574-6968.1996.tb08004.x</doi><tpages>9</tpages></addata></record>
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source Access via Wiley Online Library; Oxford University Press Journals All Titles (1996-Current); MEDLINE; Alma/SFX Local Collection
subjects Amino Acid Sequence
Bacterial Proteins - chemistry
Bacterial Proteins - genetics
Bacterial Toxins
Bacteriology
Base Sequence
Biological and medical sciences
Conserved Sequence - genetics
Cyanobacteria
Cyanophyta
Deoxyribonucleic acid
DNA
DNA, Bacterial - analysis
DNA, Bacterial - genetics
Domains
Fragments
Freshwater
Fundamental and applied biological sciences. Psychology
Gene sequencing
Genes
Genes, Bacterial - genetics
Genetics
Hepatotoxicity
Homology
Microbiology
Microcysti
Microcystins
Microcystis
Microcystis - enzymology
Microcystis - genetics
Microcystis aeruginosa
Molecular Sequence Data
Nucleic Acid Hybridization
Nucleotide sequence
Peptide Synthases - genetics
Peptide synthetase
Peptides
Sequence Analysis, DNA
Sequence Homology, Nucleic Acid
Toxins
title Toxic and non-toxic strains of the cyanobacterium Microcystis aeruginosa contain sequences homologous to peptide synthetase genes
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