Lyngbya genus

More recently, another cyanobacterium belonging to Lyngbya genus, L. bouillonii, has been shown to contain a new tetrapeptide, lyngbyapeptin A (427), which contains the rare 3-methoxy-2-butenoyl moiety and a thiazole ring [333]. 

Cyanobacteria are photosynthetic prokaryotes that are widely distributed throughout marine and terrestrial environments. Members of the marine cyanobacteria genus Lyngbya are known to produce structurally interesting and biologically active secondary metabolites. Typically, linear/cyclic peptides and depsipeptides that include various nonproteinogenic amino acids are the major groups of these metabolites (Fig. 10.11), which can exhibit potent cytotoxicity. 

Reports on the anti-influenza virus effects of extracts from marine algae from all over the world have been found in the literature [115]. These results show that the blue-green algae (cyanobacterium) are able to produce compounds with anti-influenza activity that may be of potential clinical interest. For example, aqueous and methanolic extracts of cultured cyanobacteria of several genera. Microcystis, Nodularia, Oscillatoria, Scytonema, Lyngbya and Calothrix were evaluated for their in vitro antiviral activity against the influenza A virus in Madin Darby kidney cells [116,117]. The further analysis of methanolic extracts of cultured strains of genus Microcystis revealed a remarkable antiviral... 

Less is known of the occurrence of these alkaloids in the cyanobacteria. 4-Substituted quinolines [J.4.1 (2), J.4.1.1 (1)] have been recorded from only one genus Lyngbya (OscUlatoiiaceae, Oscillatoiiales order) (276) showing affinity to Proteobacteria. 

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