biostudies-literatureUnknown5Minegishi KPropionibacterium acnes is one of the most commonly implicated etiologic agents of sarcoidosis. We previously reported a complete genome sequence of the C1 strain of P. acnes as a clinical isolate from subcutaneous granulomatous inflammatory lesions in a patient with sarcoidosis. In the present study, we initially searched for genetic profiles specific to the C1 strain by core genome analysis and multiple genome alignment with database sequences from 76 and 9 P. acnes strains, respectively. The analysis revealed that the C1 strain was phylogenetically independent and carried an 18.8-kbp transposon sequence unique to the sarcoid isolate. The unique composite transposon comprised a novel insertion sequence and extrinsic genes from bacteria other than P. acnes. Multilocus sequence typing usinScientific reports9832https://www.ebi.ac.uk/biostudies/studies/S-EPMC4428272biostudies-literatureGenetic profiles of Propionibacterium acnes and identification of a unique transposon with novel insertion sequences in sarcoid and non-sarcoid isolates.PMC4428272Minegishi KMaruyama FWatanabe TAkashi TSuzuki YEishi YFurukawa AUchida KNakagawa IfalseGenetic profiles of Propionibacterium acnes and identification of a unique transposon with novel insertion sequences in sarcoid and non-sarcoid isolates.Propionibacterium acnes is one of the most commonly implicated etiologic agents of sarcoidosis. We previously reported a complete genome sequence of the C1 strain of P. acnes as a clinical isolate from subcutaneous granulomatous inflammatory lesions in a patient with sarcoidosis. In the present study, we initially searched for genetic profiles specific to the C1 strain by core genome analysis and multiple genome alignment with database sequences from 76 and 9 P. acnes strains, respectively. The analysis revealed that the C1 strain was phylogenetically independent and carried an 18.8-kbp transposon sequence unique to the sarcoid isolate. The unique composite transposon comprised a novel insertion sequence and extrinsic genes from bacteria other than P. acnes. Multilocus sequence typing usin2015-01-01T00:00:00Z2015 May2026-05-02T15:42:37.774Z2019-03-27T01:51:26ZS-EPMC44282722596605410.1038/srep09832