期刊
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
卷 354, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijfoodmicro.2021.109326
关键词
Serratia; Genome mining; Pangenome; Phylogeny; luxS; Spoilage markers
资金
- french Ministe're de l'Enseignement Superieur et de la Recherche
- France Genomique [ANR-10-INBS-09, ANR-11-INBS-0013]
- CNRS [UMR8030]
This study classified 47 Serratia isolates from seafood based on a phylogeny of the luxS gene, identifying S. proteamaculans as the main species in seafood products. Pangenome analyses of S. proteamaculans and S. liquefaciens showed high adaptation potential, revealing their involvement in biosynthetic pathways of antimicrobial compounds and seafood spoilage compounds. The genetic equipment highlighted in this study provided insights into the predominance of Serratia in seafood products and their spoilage capabilities.
Serratia sp. cause food losses and waste due to spoilage; it is noteworthy that they represent a dominant population in seafood. The main spoilage associated species comprise S. liquefaciens, S. grimesii, S. proteamaculans and S. quinivorans, also known as S. liquefaciens-like strains. These species are difficult to discriminate since classical 16S rRNA gene-based sequences do not possess sufficient resolution. In this study, a phylogeny based on the short-length luxS gene was able to speciate 47 Serratia isolates from seafood, with S. proteamaculans being the main species from fresh salmon and tuna, cold-smoked salmon, and cooked shrimp while S. liquefaciens was only found in cold-smoked salmon. The genome of the first S. proteamaculans strain isolated from the seafood matrix (CD3406 strain) was sequenced. Pangenome analyses of S. proteamaculans and S. liquefaciens indicated high adaptation potential. Biosynthetic pathways involved in antimicrobial compounds production and in the main seafood spoilage compounds were also identified. The genetic equipment highlighted in this study contributed to gain further insights into the predominance of Serratia in seafood products and their capacity to spoil.
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