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Dermacoccus abyssi sp. nov., a piezotolerant actinomycete isolated from the Mariana Trench

Wasu Pathom-aree^1,, Yuichi Nogi², Iain C. Sutcliffe³, Alan C. Ward¹, Koki Horikoshi², Alan T. Bull⁴ and Michael Goodfellow¹

¹ Division of Biology, King George VI Building, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK
² Extremobiosphere Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
³ School of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
⁴ Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK

Correspondence
Michael Goodfellow
m.goodfellow{at}ncl.ac.uk

The taxonomic status of an actinobacterial strain isolated from Mariana Trench sediment was determined using a polyphasic taxonomic approach. The strain, isolate MT1.1^T, formed a distinct clade in the Micrococcineae 16S rRNA gene tree together with Dermacoccus nishinomiyaensis DSM 20448^T. The organism had chemical and phenotypic properties consistent with its classification in the genus Dermacoccus and could be distinguished from D. nishinomiyaensis DSM 20448^T using DNA–DNA relatedness and phenotypic data. The G+C content of the DNA of isolate MT1.1^T was 65.2 mol%. It is evident that the organism merits recognition as a novel species in the genus Dermacoccus. The name proposed for this taxon is Dermacoccus abyssi sp. nov.; the type strain is MT1.1^T (=DSM 17573^T=NCIMB 14084^T). The organism grows well at 40 MPa and hence is piezotolerant.

Present address: Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.

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