Discovery of Unusual Cyanobacterial Tryptophan-Containing Anabaenopeptins by MS/MS-Based Molecular Networking

0532779 - MBÚ 2021 RIV CH eng J - Journal Article
Saha, Subhasish - Esposito, G. - Urajová, Petra - Mareš, Jan - Ewe, Daniela - Caso, A. - Macho, Markéta - Delawská, Kateřina - Kust, Andreja - Hrouzek, Pavel - Juráň, Josef - Costantino, V. - Saurav, Kumar
Discovery of Unusual Cyanobacterial Tryptophan-Containing Anabaenopeptins by MS/MS-Based Molecular Networking.
Molecules. Roč. 25, č. 17 (2020), č. článku 3786. E-ISSN 1420-3049
R&D Projects: GA MŠMT(CZ) EF18_070/0010493; GA ČR(CZ) GJ19-17868Y
Institutional support: RVO:61388971 ; RVO:67985939
Keywords : Brasilonema * anabaenopeptins * hexapeptides * tryptophan-containing peptides
OECD category: Microbiology; Microbiology (BU-J)
Impact factor: 4.412, year: 2020
Method of publishing: Open access
https://www.mdpi.com/1420-3049/25/17/3786

Heterocytous cyanobacteria are among the most prolific sources of bioactive secondary metabolites, including anabaenopeptins (APTs). A terrestrial filamentous Brasilonema sp. CT11 collected in Costa Rica bamboo forest as a black mat, was studied using a multidisciplinary approach: genome mining and HPLC-HRMS/MS coupled with bioinformatic analyses. Herein, we report the nearly complete genome consisting of 8.79 Mbp with a GC content of 42.4%. Moreover, we report on three novel tryptophan-containing APTs, anabaenopeptin 788 (1), anabaenopeptin 802 (2), and anabaenopeptin 816 (3). Furthermore, the structure of two homologues, i.e., anabaenopeptin 802 (2a) and anabaenopeptin 802 (2b), was determined by spectroscopic analysis (NMR and MS). Both compounds were shown to exert weak to moderate antiproliferative activity against HeLa cell lines. This study also provides the unique and diverse potential of biosynthetic gene clusters and an assessment of the predicted chemical space yet to be discovered from this genus.
Permanent Link: http://hdl.handle.net/11104/0311228