Abstract
Phaeobacter gallaeciensis CIP 105210T (= DSM 26640T = BS107T) is the type strain of the species Phaeobacter gallaeciensis. The genus Phaeobacter belongs to the marine Roseobacter group (Rhodobacteraceae, Alphaproteobacteria). Phaeobacter species are effective colonizers of marine surfaces, including frequent associations with eukaryotes. Strain BS107T was isolated from a rearing of the scallop Pecten maximus. Here we describe the features of this organism, together with the complete genome sequence, comprising eight circular replicons with a total of 4,448 genes. In addition to a high number of extrachromosomal replicons, the genome contains six genomic island and three putative prophage regions, as well as a hybrid between a plasmid and a circular phage. Phylogenomic analyses confirm previous results, which indicated that the originally reported P. gallaeciensis type-strain deposit DSM 17395 belongs to P. inhibens and that CIP 105210T (= DSM 26640T) is the sole genome-sequenced representative of P. gallaeciensis.
Highlights
Strain CIP 105210T (= BS107T = DSM 26640T) is the type strain of Phaeobacter gallaeciensis, the type species of Phaeobacter, a genus of marine species of Rhodobacteraceae (Rhodobacterales, Alphaproteobacteria)
BS107T was isolated from the scallop Pecten maximus and was initially described as the type strain of Roseobacter gallaeciensis [1]
A recent study [3] revealed the non-identity of the reported identical deposits DSM 17395 and CIP 105210T and confirmed that the strain CIP 105210T represents the original P. gallaeciensis isolate BS107T, which is deposited in the DSMZ open collection as DSM 26640T
Summary
Strain CIP 105210T (= BS107T = DSM 26640T) is the type strain of Phaeobacter gallaeciensis, the type species of Phaeobacter, a genus of marine species of Rhodobacteraceae (Rhodobacterales, Alphaproteobacteria). After comprehensive reclassifications of Rhodobacteraceae genera, BS107T became the type strain of the species P. gallaeciensis [2], currently comprising the species P. gallaeciensis, P. inhibens, P. caeruleus, P. daeponensis, P. leonis and P. arcticus. Strain DSM 17395 was reclassified as a representative of the sister species P. inhibens. Analysis of their similar, but distinct metabolic capacities allowed for a discrimination between the two strains, which were originally reported to represent the same type strain [3]. We present the complete genome sequence of P. gallaeciensis CIP 105210T, together with a summary classification and a set of features, including insights into genome architecture, genomic islands and phages
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