RRC ID 21253
著者 Neilan BA, Dittmann E, Rouhiainen L, Bass RA, Schaub V, Sivonen K, Börner T.
タイトル Nonribosomal peptide synthesis and toxigenicity of cyanobacteria.
ジャーナル J Bacteriol
Abstract Nonribosomal peptide synthesis is achieved in prokaryotes and lower eukaryotes by the thiotemplate function of large, modular enzyme complexes known collectively as peptide synthetases. These and other multifunctional enzyme complexes, such as polyketide synthases, are of interest due to their use in unnatural-product or combinatorial biosynthesis (R. McDaniel, S. Ebert-Khosla, D. A. Hopwood, and C. Khosla, Science 262:1546-1557, 1993; T. Stachelhaus, A. Schneider, and M. A. Marahiel, Science 269:69-72, 1995). Most nonribosomal peptides from microorganisms are classified as secondary metabolites; that is, they rarely have a role in primary metabolism, growth, or reproduction but have evolved to somehow benefit the producing organisms. Cyanobacteria produce a myriad array of secondary metabolites, including alkaloids, polyketides, and nonribosomal peptides, some of which are potent toxins. This paper addresses the molecular genetic basis of nonribosomal peptide synthesis in diverse species of cyanobacteria. Amplification of peptide synthetase genes was achieved by use of degenerate primers directed to conserved functional motifs of these modular enzyme complexes. Specific detection of the gene cluster encoding the biosynthetic pathway of the cyanobacterial toxin microcystin was shown for both cultured and uncultured samples. Blot hybridizations, DNA amplifications, sequencing, and evolutionary analysis revealed a broad distribution of peptide synthetase gene orthologues in cyanobacteria. The results demonstrate a molecular approach to assessing preexpression microbial functional diversity in uncultured cyanobacteria. The nonribosomal peptide biosynthetic pathways detected may lead to the discovery and engineering of novel antibiotics, immunosuppressants, or antiviral agents.
巻・号 181(13)
ページ 4089-97
公開日 1999-7-1
DOI 10.1128/JB.181.13.4089-4097.1999
PMID 10383979
PMC PMC93901
MeSH Bacterial Toxins / biosynthesis* Cyanobacteria / enzymology Cyanobacteria / genetics* DNA Primers Evolution, Molecular Genes, Bacterial* Marine Toxins / biosynthesis* Microcystins Peptide Biosynthesis Peptide Synthases / classification Peptide Synthases / genetics* Peptide Synthases / metabolism Peptides, Cyclic / biosynthesis* Polymerase Chain Reaction Species Specificity
IF 3.006
引用数 197
WOS 分野 MICROBIOLOGY
リソース情報
藻類 NIES-81 NIES-24 NIES-19 NIES-204 NIES-99 NIES-102 NIES-107