Abstract
Roseovarius mucosus Biebl et al. 2005 is a bacteriochlorophyll a-producing representative of the marine Roseobacter group within the alphaproteobacterial family Rhodobacteraceae, which was isolated from the dinoflagellate Alexandrium ostenfeldii. The marine Roseobacter group was found to be abundant in the ocean and plays an important role for global and biogeochemical processes. Here we describe the features of the R. mucosus strain DFL-24T together with its genome sequence and annotation generated from a culture of DSM 17069T. The 4,247,724 bp containing genome sequence encodes 4,194 protein-coding genes and 57 RNA genes. In addition to the presence of four plasmids, genome analysis revealed the presence of genes associated with host colonization, DMSP utilization, cytotoxins, and quorum sensing that could play a role in the interrelationship of R. mucosus with the dinoflagellate A. ostenfeldii and other marine organisms. Furthermore, the genome encodes genes associated with mixotrophic growth, where both reduced inorganic compounds for lithotrophic growth and a photoheterotrophic lifestyle using light as additional energy source could be used.
Highlights
The Roseobacter group was shown to constitute a major component within the marine environments, encompassing around 20% of the bacterial community in coastal areas and 15% in mixed ocean-layers [1,2]
In the following paragraphs some features encoded in the genome of strain DSM 17069T are mentioned that could play a role in the interrelationship of R. mucosus with the dinoflagellate A. ostenfeldii and other marine organisms
Genome analysis of R. mucosus DSM 17069T revealed the presence of genes putatively associated with quorum sensing (QS) activity, like e.g. a N-acyl-L-homoserine lactone synthetase and several regulator proteins belonging to the luxR family
Summary
The Roseobacter group was shown to constitute a major component within the marine environments, encompassing around 20% of the bacterial community in coastal areas and 15% in mixed ocean-layers [1,2]. TM1035 (IMG taxon ID 640963035 = ABCL00000000; total number of genes: 4158), both reveal a genome length shorter than that of strain DSM 17069T, and remain still in draft state. Genome sequencing of strain R. mucosus DSM 17069T revealed the presence of four plasmids with sizes between 21 kb and 123 kb (Table 5).
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