Uncovering the biotechnological capacity of marine and brackish water Planctomycetota

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Vitorino, IR (Author) Other; Eugenia Pinto (Author) FFUP; Martín, J (Author) Other; Mackenzie, TA (Author) Other; Ramos, MC (Author) Other; Sánchez, P (Author) Other; de la Cruz, M (Author) Other; Vicente, F (Author) Other; Vasconcelos, V (Author) Other; Reyes, F (Author) Other; lage, om (Author) FCUP

Journal

Title: Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology

Vol. 117

ISSN: 0003-6072

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00Z-TQY

DOI: 10.1007/s10482-023-01923-z

Abstract (EN): An appealing strategy for finding novel bioactive molecules in Nature consists in exploring underrepresented and -studied microorganisms. Here, we investigated the antimicrobial and tumoral anti-proliferative bioactivities of twenty-three marine and estuarine bacteria of the fascinating phylum Planctomycetota. This was achieved through extraction of compounds produced by the Planctomycetota cultured in oligotrophic medium followed by an antimicrobial screening against ten relevant human pathogens including Gram-positive and Gram-negative bacteria, and fungi. Cytotoxic effects of the extracts were also evaluated against five tumoral cell lines. Moderate to potent activities were obtained against Enterococcus faecalis, methicillin-sensitive and methicillin-resistant Staphylococcus aureus and vancomycin-sensitive and vancomycin-resistant Enterococcus faecium. Anti-fungal effects were observed against Trichophyton rubrum, Candida albicans and Aspergillus fumigatus. The highest cytotoxic effects were observed against human breast, pancreas and melanoma tumoral cell lines. Novipirellula caenicola and Rhodopirellula spp. strains displayed the widest spectrum of bioactivities while Rubinisphaera margarita ICM_H10(T) affected all Gram-positive bacteria tested. LC-HRMS analysis of the extracts did not reveal the presence of any known bioactive natural product, suggesting that the observed activities are most likely caused by novel molecules, that need identification. In summary, we expanded the scope of planctomycetal species investigated for bioactivities and demonstrated that various strains are promising sources of novel bioactive compounds, which reenforces the potential biotechnological prospects offered by Planctomycetota.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16