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The Farmed Atlantic Salmon (Salmo salar) Skin-Mucus Proteome and Its Nutrient Potential for the Resident Bacterial Community

Journal article
Authors G. Minniti
S. R. Sandve
János T Padra
L. H. Hagen
Sara K. Lindén
P. B. Pope
M. O. Arntzen
G. Vaaje-Kolstad
Microbial Ecology V. P. Hill Mm
Published in Genes
Volume 10
Issue 7
ISSN 2073-4425
Publication year 2019
Published at Institute of Biomedicine, Department of Medical Biochemistry and Cell Biology
Language en
Links dx.doi.org/10.3390/genes10070515
Keywords teleost, Salmo salar, skin-mucus, microbiome, proteome, aquaculture, louse lepeophtheirus-salmonis, trout oncorhynchus-mykiss, seabream, sparus-aurata, antimicrobial activity, epidermal mucus, physicochemical, parameters, molecular characterization, vibrio-splendidus, gene, ontology, fish, Genetics & Heredity
Subject categories Genetics

Abstract

Norway is the largest producer and exporter of farmed Atlantic salmon (Salmo salar) worldwide. Skin disorders correlated with bacterial infections represent an important challenge for fish farmers due to the economic losses caused. Little is known about this topic, thus studying the skin-mucus of Salmo salar and its bacterial community depict a step forward in understanding fish welfare in aquaculture. In this study, we used label free quantitative mass spectrometry to investigate the skin-mucus proteins associated with both Atlantic salmon and bacteria. In particular, the microbial temporal proteome dynamics during nine days of mucus incubation with sterilized seawater was investigated, in order to evaluate their capacity to utilize mucus components for growth in this environment. At the start of the incubation period, the largest proportion of proteins (similar to 99%) belonged to the salmon and many of these proteins were assigned to protecting functions, confirming the defensive role of mucus. On the contrary, after nine days of incubation, most of the proteins detected were assigned to bacteria, mainly to the genera Vibrio and Pseudoalteromonas. Most of the predicted secreted proteins were affiliated with transport and metabolic processes. In particular, a large abundance and variety of bacterial proteases were observed, highlighting the capacity of bacteria to degrade the skin-mucus proteins of Atlantic salmon.

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