A frameshift mutation in the rRNA large subunit methyltransferase generlmAIIdetermines the susceptibility of a honey bee pathogenMelissococcus plutoniusto mirosamicin

Autor: Emi Yoshida, Yuichi Ueno, Ken Katsuda, Masatoshi Okura, Makoto Osaki, Eri Watando, Daisuke Takamatsu, Masahiro Kusumoto
Rok vydání: 2018
Předmět:
Zdroj: SC30201903220008
NARO成果DBa
ISSN: 1462-2920
1462-2912
DOI: 10.1111/1462-2920.14365
Popis: American foulbrood (AFB) and European foulbrood (EFB) caused by Paenibacillus larvae and Melissococcus plutonius, respectively, are major bacterial infections of honey bees. Although macrolides (mirosamicin [MRM] and tylosin) have been used to prevent AFB in Japan, macrolide-resistant P. larvae have yet to be found. In this study, we revealed that both MRM-resistant and -susceptible strains exist in Japanese M. plutonius and that a methyltransferase gene (rlmA II ) was disrupted exclusively in MRM-susceptible strains due to a single-nucleotide insertion. The M. plutonius RlmAII modified G748 of 23S rRNA, and the deletion of rlmA II resulted in increased susceptibility to MRM and the loss of modification at G748, suggesting that methylation at G748 by RlmAII confers MRM resistance in M. plutonius. The single-nucleotide mutation in MRM-susceptible strains was easily repaired by spontaneous deletion of the inserted nucleotide; however, intact rlmA II was only found in Japanese M. plutonius and not in a Paraguayan strain tested or any of the whole-genome-sequenced European strains. MRM has been used in apiculture only in Japan. Although M. plutonius is not the target of this drug, the use of MRM as a prophylactic drug for AFB may have influenced the antibiotic susceptibility of the causative agent of EFB.
Databáze: OpenAIRE
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