Abstract
Coriobacterium glomerans Haas and König 1988, is the only species of the genus Coriobacterium, family Coriobacteriaceae, order Coriobacteriales, phylum Actinobacteria. The bacterium thrives as an endosymbiont of pyrrhocorid bugs, i.e. the red fire bug Pyrrhocoris apterus L. The rationale for sequencing the genome of strain PW2T is its endosymbiotic life style which is rare among members of Actinobacteria. Here we describe the features of this symbiont, together with the complete genome sequence and its annotation. This is the first complete genome sequence of a member of the genus Coriobacterium and the sixth member of the order Coriobacteriales for which complete genome sequences are now available. The 2,115,681 bp long single replicon genome with its 1,804 protein-coding and 54 RNA genes is part of the Genomic Encyclopedia of Bacteria and Archaea project.
Highlights
Strain PW2T (= DSM 20642 = ATCC 49209 = JCM 10262) is the type strain of Coriobacterium glomerans [1]
The absence of sequence data in the original description excluded determination of the phylogenetic position of the genus Coriobacterium, but taxonomic evidence excluded an affiliation with Bifidobacterium, Eubacterium or Lachnospira
The 16S rRNA gene sequence [2] revealed that Coriobacterium and Atopobium [3] are phylogenetic neighbors
Summary
The 16S rRNA gene sequence [2] revealed that Coriobacterium and Atopobium [3] are phylogenetic neighbors. Based upon phylogenetic position within the class Actinobacteria and a unique set of 16S rRNA gene signature nucleotides both genera were placed in the family Coriobacteriaceae, order Coriobacterales, subclass Coriobacteridae [4]. BLAST re-analysis of 16S rRNA gene sequences of other strains and clones (e.g. accession numbers AJ131149, AJ131150, AJ245921) reported to be members of Coriobacterium [11] revealed that they are members of Collinsella.
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