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- W2150604875 abstract "Cyanobacteria possess the ability to produce compounds with remarkable biological activity, and have thus attracted the attention of the pharmaceutical industry. Cyanopeptides acting as protease inhibitors have shown potential in the field of pharmacotherapy through regulation of abnormal physiological processes in the human body. Despite the already described cyanopeptide protease inhibitors, the search for new congeners is of considerable interest which may pave the way for more efficient molecules. In this study, the presence of the protease inhibitors aeruginosin and cyanopeptolin with non-, mono- and dichlorination and also genes coding for their synthetases was investigated in 90 cyanobacterial strains. Mass spectrometry analyses highlighted production of 91, 19 and 3 non-, mono- and dichlorinated congeners, respectively. The purified extract of Microcystis botrys SPC759 inhibited 61% of pepsin protease. PCR amplifications of aeruginosin and cyanopeptolin synthetase gene regions were observed in 41 and 28% of evaluated strains, respectively. The sequences obtained for the aerA-aerB (aeruginosin) and mcnC-mcnE (cyanopeptolin) gene regions grouped together with their homologues found in other cyanobacterial strains in the phylogenetic analyses with high bootstrap support. Antimicrobial activity assays performed using all intracellular extracts inhibited 31 and 26% of Gram-negative and Gram-positive pathogenic bacterial growth, respectively. The results of this study showed the production of aeruginosin and cyanopeptolin and the presence of their genes in several cyanobacterial genera for the first time besides the discovery of novel congeners." @default.
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- W2150604875 date "2012-10-01" @default.
- W2150604875 modified "2023-10-02" @default.
- W2150604875 title "Non-Ribosomal Halogenated Protease Inhibitors from Cyanobacterial Isolates as Attractive Drug Targets" @default.
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- W2150604875 doi "https://doi.org/10.2174/092986712803530539" @default.
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