Open AccessReclassification of Micrococcus aloeverae and Micrococcus yunnanensis as later heterotypic synonyms of Micrococcus luteus
Author(s) -
ChienHsun Huang,
Chunlin Wang,
JongShian Liou,
Ai-Yun Lee,
Jochen Blom,
Lina Huang,
Koichi Watanabe
Publication year - 2019
Publication title -
international journal of systematic and evolutionary microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 173
eISSN - 1466-5034
pISSN - 1466-5026
DOI - 10.1099/ijsem.0.003654
Subject(s) - micrococcus luteus , biology , micrococcus , rpob , housekeeping gene , botany , microbiology and biotechnology , bacteria , 16s ribosomal rna , gene , genetics , staphylococcus aureus , gene expression
Micrococcus aloeverae,Micrococcus endophyticus , Micrococcus luteus and Micrococcus yunnanensis are phenotypically and genotypically closely related, and together comprise the M. luteus group. In this study, the taxonomic relationships among Micrococcus aloeverae , M. luteus and M. yunnanensis were re-evaluated by using polyphasic approaches. The similarity values of the concatenated housekeeping gene ( gyrB , recA and rpoB ) sequences shared by the type strains of M. aloeverae , M. luteus and M. yunnanensis ranged from 98.3 to 99.4 %. The average nucleotide identity, average amino acid identity and digital DNA‒DNA hybridization values among these three taxa were greater (97.1‒98.1 %, 96.8‒98.1 % and 75.0‒83.5 %, respectively) than the thresholds for bacterial species delineation, indicating that they belong to the same species, whereas those for M. endophyticus were clearly lower than the thresholds. In addition, phenotypic and chemotaxonomic characterization results also support the synonymy of these three taxa. Therefore, we propose that M. aloeverae and M. yunnanensis should be reclassified as later heterotypic synonyms of M. luteus .