| RRC ID |
88833
|
| Author |
Okuhama S, Takahashi H, Nakayama Y, Endo A.
|
| Title |
Reclassification of Bifidobacterium faecale Choi et al. 2014 as a later heterotypic synonym of Bifidobacterium adolescentis Reuter 1963.
|
| Journal |
Int J Syst Evol Microbiol
|
| Abstract |
Bifidobacterium faecale CU 3-7T (=JCM 19861T=KACC 17904T) was identified as a novel species primarily through phylogenetic analyses of the 16S rRNA gene, heat shock protein 60 (hsp60) and dnaJ1 sequences, and in vitro DNA-DNA hybridization (DDH) compared to Bifidobacterium adolescentis. However, genome-based taxonomic approaches have not been studied yet. This study reassessed the taxonomic relationship between B. faecale and B. adolescentis using overall genome-associated indices. The type strains of the two species possessed heterogeneous copies of the 16S rRNA gene within their genomes, with similarities below the species threshold of 98.7-99.0%. Therefore, we were unable to assess the 16S rRNA gene similarity-based taxonomic relationships. This indicated that the 16S rRNA gene is not an appropriate marker for studying the taxonomy of B. adolescentis-associated taxa. The type strains exhibited an ortho average nucleotide identity uncorrected value of 97.7% and a digital DDH value of 80.7%, indicating that they should be assigned to a single taxon. A genome-based re-assessment indicated that B. faecale should be reclassified as a later heterotypic synonym of B. adolescentis.
|
| Volume |
75(3)
|
| Published |
2025-3-1
|
| DOI |
10.1099/ijsem.0.006706
|
| PMID |
40085487
|
| MeSH |
Bacterial Typing Techniques
Bifidobacterium* / classification
Bifidobacterium* / genetics
Bifidobacterium adolescentis* / classification
Bifidobacterium adolescentis* / genetics
DNA, Bacterial / genetics
Genome, Bacterial
Nucleic Acid Hybridization
Phylogeny*
RNA, Ribosomal, 16S / genetics
Sequence Analysis, DNA
|
| Resource |
| General Microbes |
JCM19861
JCM1275 |
