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Genome Sequence of the Pink to Light Reddish-Pigmented Rubellimicrobium Mesophilum Type Strain (DSM 19309T), a Representative Of

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Genome Sequence of the Pink to Light Reddish-Pigmented Rubellimicrobium Mesophilum Type Strain (DSM 19309T), a Representative Of Genome sequence of the pink to light reddish-pigmented Rubellimicrobium mesophilum type strain (DSM 19309T), a representative of the Roseobacter group isolated from soil, and emended description of the species Thomas Riedel, Stefan Spring, Anne Fiebig, Jörn Petersen, Markus Göker, Hans-Peter Klenk To cite this version: Thomas Riedel, Stefan Spring, Anne Fiebig, Jörn Petersen, Markus Göker, et al.. Genome sequence of the pink to light reddish-pigmented Rubellimicrobium mesophilum type strain (DSM 19309T), a representative of the Roseobacter group isolated from soil, and emended description of the species. Standards in Genomic Sciences, BioMedCentral, 2014, 9 (3), pp.902-913. 10.4056/sigs.5621012. hal- 01230502 HAL Id: hal-01230502 https://hal.sorbonne-universite.fr/hal-01230502 Submitted on 18 Nov 2015 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Standards in Genomic Sciences (2014) 9:902-913 DOI:10.4056/sigs.5621012 Genome sequence of the pink to light reddish-pigmented Rubellimicrobium mesophilum type strain (DSM 19309T), a representative of the Roseobacter group isolated from soil, and emended description of the species Thomas Riedel1,2, Stefan Spring3, Anne Fiebig3, Jörn Petersen3, Markus Göker3*, Hans-Peter Klenk3 1 Sorbonne Universités, UPMC Univ Paris 06, USR3579, LBBM, Observatoire Océanologique, Banyuls/Mer, France 2 CNRS, USR3579, LBBM, Observatoire Océanologique, Banyuls/Mer, France 3 Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany *Correspondence: Markus Göker ([email protected]) Keywords: Irregular rod-shaped, motile, aerobic, stenohaline, chemoorganotroph, Roseobacter group, Roseobacter group, Rhodobacteraceae, Alphaproteobacteria. Rubellimicrobium mesophilum Dastager et al. 2008 is a mesophilic and light reddish- pigmented representative of the Roseobacter group within the alphaproteobacterial family Rhodobacteraceae. Representatives of the Roseobacter group play an important role in the marine biogeochemical cycles and were found in a broad variety of marine environments as- sociated with algal blooms, different kinds of sediments, and surfaces of invertebrates and vertebrates. Roseobacters were shown to be widely distributed, especially within the total bacterial community found in coastal waters, as well as in mixed water layers of the open ocean. Here we describe the features of R. mesophilum strain MSL-20T together with its ge- nome sequence and annotation generated from a culture of DSM 19309T. The 4,927,676 bp genome sequence consists of one chromosome and probably one extrachromosomal ele- ment. It contains 5,082 protein-coding genes and 56 RNA genes. As previously reported, the G+C content is significantly different from the actual genome sequence-based G+C content and as the type strain tests positively for oxidase, the species description is emended accord- ingly. The genome was sequenced as part of the activities of the Transregional Collaborative Research Centre 51 (TRR51) funded by the German Research Foundation (DFG). Introduction Strain MSL-20T (= DSM 19309T = KCTC 22012T) is paper mill (R. thermophilum [3]), air (R. aerolatum the type strain of the species Rubellimicrobium [4]) and forest soil (R. roseum [5]), which indicates mesophilum [1], one of four species with validly rather diverse habitats for Rubellimicrobium. Cur- published names in the genus Rubellimicrobium rent PubMed records do not indicate any follow- [2,3]; the other three species in the genus are R. up research with strain MSL-20T since the initial thermophilum [3], R. aerolatum [4] and R. roseum description of R. mesophilum [1]. Here we present [5]. Rubellimicrobium belongs to the abundant a summary classification and a set of features for marine Roseobacter group [6]. The species epithet R. mesophilum MSL-20T, together with the descrip- mesophilum refers to the Greek adjective mesos, tion of the complete genomic sequencing and an- middle, as well as from the Neo-Latin adjective notation. ‘philus –a –um’, friend/loving [1], the middle (temperature-) loving. Strain MSL-20T was isolat- Classification and features ed from soil located at Bigeum Island, Republic of 16S rRNA gene analysis Korea [1], whereas the other type strains within Figure 1 shows the phylogenetic neighborhood of the genus Rubellimicrobium were isolated from a R. mesophilum in a 16S rRNA gene sequence-based The Genomic Standards Consortium Riedel et al. tree. The sequence of the single 16S rRNA gene in 'Pararubellimicrobium aerilata' (EU338486), the DSM 19309T genome does not differ from the which corresponded to an identity of 96.3% and a previously published 16S rRNA gene sequence HSP coverage of 98.0%. (Note that the Greengenes (EF547368), which contains four ambiguous base database uses the INSDC (=EMBL/NCBI/DDBJ) calls. annotation, which is not an authoritative source The genomic 16S rRNA gene sequence of R. for nomenclature or classification). The highest- mesophilum DSM 19309T was compared with the scoring environmental sequence was JF417792 Greengenes database for determining the (Greengenes short name 'microbial structures weighted relative frequencies of taxa and (trun- coalbeds located Eerduosi Basin China coalbed cated) keywords as previously described [7]. The clone QQSB73'), which showed an identity of most frequently occurring genera were 98.7% and a HSP coverage of 99.6%. The most Paracoccus (45.3%), Loktanella (30.3%), frequently occurring keywords within the labels Rubellimicrobium (14.0%), Methylarcula (8.4%) of all environmental samples which yielded hits and 'Pararubellimicrobium' (2.0%) (58 hits in to- were 'skin' (10.6%), 'fossa' (5.9%), 'poplit' (4.2%), tal). Regarding the five hits to sequences from 'forearm, volar' (3.3%) and 'sea' (2.8%) (192 hits other members of the genus, the average identity in total). Environmental samples which yielded within HSPs was 94.9%, whereas the average cov- hits of a higher score than the highest scoring spe- erage by HSPs was 99.3%. Among all other spe- cies were not found, indicating that R. mesophilum cies, the one yielding the highest score was has rarely been detected in the environment. Figure 1. Phylogenetic tree highlighting the position of R. mesophilum relative to the type strains of the other species within the genus Rubellimicrobium and the neighboring genera Citreicella and Wenxinia. The tree was inferred from 1,381 aligned characters of the 16S rRNA gene sequences under the maximum likelihood (ML) criterion as previous- ly described [7]. The branches are scaled in terms of the expected number of substitutions per site. Numbers adja- cent to the branches are support values from 1,000 ML bootstrap replicates (left) and from 1,000 maximum- parsimony bootstrap replicates (right) if larger than 60% [7]. Lineages with type strain genome sequencing projects registered in GOLD [8] are labeled with one asterisk [9]. http://standardsingenomics.org 903 Rubellimicrobium mesophilum Morphology and physiology positive for leucine arylamidase, naphthol-AS-BI- Cells of strain MSL-20T stain Gram-negative, are phosphohydrolase and α-glucosidase. Growth is described to be motile (without a flagellum) [1], observed in a temperature range of 20-37°C with and ovoid or rod-shaped, 1.6-3.4 µm in length and an optimum at 28°C. The pH range for growth is 0.4-0.7 µm in width (Figure 2 and Table 1). On between pH 7-11 with an optimum at pH 7.0 ± 0.2. Reasoner’s 2A (R2A) agar they form pink to light No growth occurs in the presence of NaCl in con- red-pigmented colonies. According to [1], cells are centrations of 0.5% and above. Cells of strain MSL- negative for oxidase (but see below) and nitrate 20T do not utilize the carbohydrates cellobiose, D- reduction activities, but show only weak catalase mannose, salicin, D- -melibiose, D- activity. They hydrolyze starch and Tween 80, as- sorbitol, L-malate and D-ribose, which are utilized similate cellulose, histidine, leucine and fructose, by its close relative R. thermophilumxylose, α DSM 16684T but do not utilize citrate and propionate. Cells test (all data from [1]). Figure 2. Micrograph of R. mesophilum DSM 19309T. Chemotaxonomy clopaedia of Bacteria and Archaea (GEBA) [21], The principal cellular fatty acids of strain MSL-20T but ultimately sequenced within the DFG funded are C16:0 (36.9%), C (36.5%), 11-methyl C18:1 project “Ecology, Physiology and Molecular Biolo- gy of the Roseobacter clade: Towards a Systems (12.4%), C18:0 (3.6%),18:1 ω7c C10:0 (1.3%), C12:0 (1.3%) Biology Understanding of a globally Important ω7cand C17:0 (1.2%) and differ significantly from those detected in R. thermophilum. The major respirato- Clade of Marine Bacteria”. The strain was chosen ry lipoquinone is ubiquinone Q-10, which is a for genome sequencing according to a phylogeny- common feature of alphaproteobacterial repre- driven target selection procedure for large scale sentatives (all data from [1]). genome-sequencing (and other) projects as rou- tinely used for the KMG-I project [20,22]. Genome sequencing and annotation The project information can be found in the Ge- Genome project history nome OnLine Database [8]. The Whole Genome The genome of strain R. mesophilum DSM 19309T Shotgun (WGS) sequence is deposited in GenBank was first selected for genome sequencing in phase and the Integrated Microbial Genomes database I of the one thousand microbial genomes (KMG-I) (IMG) [23]. A summary of the project information project [20], an extension of the Genomic Ency- is shown in Table 2. 904 Standards in Genomic Sciences Riedel et al. Table 1.
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