Abstract
Arcticibacterium luteifluviistationis SM1504T was isolated from Arctic surface seawater and classified as a novel genus of the phylum Bacteroides. To date, no Arcticibacterium genomes have been reported, their genomic compositions and metabolic features are still unknown. Here, we reported the complete genome sequence of A. luteifluviistationis SM1504T, which comprises 5,379,839 bp with an average GC content of 37.20%. Genes related to various stress (such as radiation, osmosis and antibiotics) resistance and gene clusters coding for carotenoid and flexirubin biosynthesis were detected in the genome. Moreover, the genome contained a 245-kb genomic island and a 15-kb incomplete prophage region. A great percentage of proteins belonging to carbohydrate metabolism especially in regard to polysaccharides utilization were found. These related genes and metabolic characteristics revealed genetic basis for adapting to the diverse extreme Arctic environments. The genome sequence of A. luteifluviistationis SM1504T also implied that the genus Arcticibacterium may act as a vital organic carbon matter decomposer in the Arctic seawater ecosystem.
Highlights
As the third most abundant bacterial group in the seawater system, phylum Bacteroidetes plays a vital role in diverse oceanic biogeochemical processes [1]
We reported the first genome sequence of the genus Arcticibacterium to better understand its survival strategy and ecological niche in the Arctic seawater
Genome project history Isolated from an extreme Arctic environment, A. luteifluviistationis SM1504T was selected for genome sequencing to elucidate the special abilities of adapting to diverse extreme stresses
Summary
As the third most abundant bacterial group in the seawater system, phylum Bacteroidetes plays a vital role in diverse oceanic biogeochemical processes [1]. It has been reported that phylum Bacteroidetes could mediate the degradation of HMW compounds especially in the respect of algal organic matter [2, 3]. Many heterotrophic microorganisms such as the SAR11 clade and marine Gammaproteobacteria grow partly due to phylum Bacteroidetes-derived organic products [4, 5]. Phylum Bacteroidetes groups may play crucial roles in the nutrient utilization and cycling in the seawater ecosystem. The family Cytophagaceae, currently comprising 31 genera, is one of the largest groups in the phylum Bacteroidetes
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