Abstract
An extremely halophilic archaeon, Haladaptatus cibarius D43T, was isolated from traditional Korean salt-rich fermented seafood. Strain D43T shows the highest 16S rRNA gene sequence similarity (98.7 %) with Haladaptatus litoreus RO1-28T, is Gram-negative staining, motile, and extremely halophilic. Despite potential industrial applications of extremely halophilic archaea, their genome characteristics remain obscure. Here, we describe the whole genome sequence and annotated features of strain D43T. The 3,926,724 bp genome includes 4,092 protein-coding and 57 RNA genes (including 6 rRNA and 49 tRNA genes) with an average G + C content of 57.76 %.
Highlights
The extremely halophilic archaea, called haloarchaea, possess the small retinal protein halorhodopsin [1,2,3] and currently consists of more than 47 genera that live in hypersaline environments [4, 5]
H. cibarius was isolated from the traditional Korean salt-fermented seafood, which is made with shellfish [8]
Strain D43T clustered with type strains of Haladaptatus species (Fig. 1), exhibiting 16S rRNA gene sequence similarities of 98.7% and 95.1% between strain D43T (EF660747) and the type strain of H. litoreus and H. paucihalophilus, respectively
Summary
The extremely halophilic archaea, called haloarchaea, possess the small retinal protein halorhodopsin [1,2,3] and currently consists of more than 47 genera that live in hypersaline environments [4, 5]. The genome sequences of this genus are expected to provide fundamental information for the halotolerant features and biotechnological applications of the haloarchaea. We describe the first whole genome sequence of H. cibarius along with its annotated features, and summarize the taxonomic classification.
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