Pseudopropionibacterium rubrum sp. nov., a novel red-pigmented species isolated from human gingival sulcus

Masanori Saito, Noriko Shinozaki-Kuwahara, Osamu Tsudukibashi, Tomomi Hashizume-Takizawa, Ryoki Kobayashi, Tomoko Kurita-Ochiai

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9 Citations (Scopus)


In this study, sStrain SK-1T, a novel gram-positive, pleomorphic, rod-shaped, non-spore forming, non-motile organism, designated SK-1T, was isolated from human gingival sulcus and found to produce acetic acid, propionic acid, lactic acid, and succinic acid as end products of glucose fermentation. Strain SK-1T is most closely related to Pseudopropionibacterium (Propionibacterium) propionicum with sequence homologies of the 16S rRNA and RNA polymerase β subunit (rpoB) genes of 96.6% and 93.1%, respectively. The genomic DNA G + C content of the isolate was 61.8 mol%. On the basis of the sequence data of the 16S rRNA and housekeeping (rpoB) genes, a novel taxon is here proposed, Pseudopropionibacterium rubrum sp. nov. (type strain SK-1T = JCM 31317T = DSM 100122T). The 16S rRNA and rpoB gene sequences of strain SK-1T have been deposited in the DDBJ under the accession numbers LC002971 and LC102236, respectively.

Original languageEnglish
Pages (from-to)388-394
Number of pages7
JournalMicrobiology and Immunology
Issue number6
Publication statusPublished - Jun 2018


  • gram-positive rod
  • oral microbiota
  • Pseudopropionibacterium rubrum


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