Whole-Genome Sequence of the Novel Antarctobacter heliothermus Strain SMS3, Found in Association with the Marine Diatom Skeletonema marinoi .

As part of an ongoing investigation into the microbiome of the marine diatom , the bacterial strain SMS3 was isolated from a culture of strain ST54, which had been propagated from a sample of top layer marine sediments taken from the Swedish west coast. We present here the sequenced genome of this bacterium, which we place in the taxon , based on a phylotaxonomic analysis and its high 16S rRNA sequence similarity to the type strain DSM 11445. Its 5,331,190 bp genome consists of a circular chromosome and three circular plasmids, and contains 5,019 CDSs. Strain SMS3 contains a phosphatidylcholine synthase gene, as well as genes involved in DMSP degradation, both of which imply a potential symbiotic relationship with its host.