Reclassification of Paenibacillus riograndensis as a genomovar of Paenibacillus sonchi: Genome-based metrics improve bacterial taxonomic classification

Reclassification of Paenibacillus riograndensis as a genomovar of Paenibacillus sonchi: Genome-based metrics improve bacterial taxonomic classification. Sant'Anna, F., H., Ambrosini, A., de Souza, R., de Carvalho Fernandes, G., Bach, E., Balsanelli, E., Baura, V., Brito, L., F., Wendisch, V., F., de Oliveira Pedrosa, F., de Souza, E., M., & Passaglia, L., M. Frontiers in Microbiology, 10, 2017.

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© 2017 Sant'Anna, Ambrosini, de Souza, de Carvalho Fernandes, Bach, Balsanelli, Baura, Brito, Wendisch, de Oliveira Pedrosa, de Souza and Passaglia. Species from the genus Paenibacillus are widely studied due to their biotechnological relevance. Dozens of novel species descriptions of this genus were published in the last couple of years, but few utilized genomic data as classification criteria. Here, we demonstrate the importance of using genome-based metrics and phylogenetic analyses to identify and classify Paenibacillus strains. For this purpose, Paenibacillus riograndensis SBR5 T , Paenibacillus sonchi X19-5 T , and their close relatives were compared through phenotypic, genotypic, and genomic approaches. With respect to P. sonchi X19-5 T , P. riograndensis SBR5 T , Paenibacillus sp. CAR114, and Paenibacillus sp. CAS34 presented ANI (average nucleotide identity) values ranging from 95.61 to 96.32%, gANI (whole-genome average nucleotide identity) values ranging from 96.78 to 97.31%, and dDDH (digital DNA-DNA hybridization) values ranging from 68.2 to 73.2%. Phylogenetic analyses of 16S rRNA, gyrB, recA, recN, and rpoB genes and concatenated proteins supported the monophyletic origin of these Paenibacillus strains. Therefore, we propose to assign Paenibacillus sp. CAR114 and Paenibacillus sp. CAS34 to P. sonchi species, and reclassify P. riograndensis SBR5 T as a later heterotypic synonym of P. sonchi (type strain X19-5 T ), with the creation of three novel genomovars, P. sonchi genomovar Sonchi (type strain X19-5 T ), P. sonchi genomovar Riograndensis (type strain SBR5 T ), P. sonchi genomovar Oryzarum (type strain CAS34 T = DSM 102041T; = BR10511T).

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 title = {Reclassification of Paenibacillus riograndensis as a genomovar of Paenibacillus sonchi: Genome-based metrics improve bacterial taxonomic classification},
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 year = {2017},
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 month = {10},
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 notes = {CAPES qualis 2013-2016 CB I: A2},
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 abstract = {© 2017 Sant'Anna, Ambrosini, de Souza, de Carvalho Fernandes, Bach, Balsanelli, Baura, Brito, Wendisch, de Oliveira Pedrosa, de Souza and Passaglia. Species from the genus Paenibacillus are widely studied due to their biotechnological relevance. Dozens of novel species descriptions of this genus were published in the last couple of years, but few utilized genomic data as classification criteria. Here, we demonstrate the importance of using genome-based metrics and phylogenetic analyses to identify and classify Paenibacillus strains. For this purpose, Paenibacillus riograndensis SBR5 T , Paenibacillus sonchi X19-5 T , and their close relatives were compared through phenotypic, genotypic, and genomic approaches. With respect to P. sonchi X19-5 T , P. riograndensis SBR5 T , Paenibacillus sp. CAR114, and Paenibacillus sp. CAS34 presented ANI (average nucleotide identity) values ranging from 95.61 to 96.32%, gANI (whole-genome average nucleotide identity) values ranging from 96.78 to 97.31%, and dDDH (digital DNA-DNA hybridization) values ranging from 68.2 to 73.2%. Phylogenetic analyses of 16S rRNA, gyrB, recA, recN, and rpoB genes and concatenated proteins supported the monophyletic origin of these Paenibacillus strains. Therefore, we propose to assign Paenibacillus sp. CAR114 and Paenibacillus sp. CAS34 to P. sonchi species, and reclassify P. riograndensis SBR5 T as a later heterotypic synonym of P. sonchi (type strain X19-5 T ), with the creation of three novel genomovars, P. sonchi genomovar Sonchi (type strain X19-5 T ), P. sonchi genomovar Riograndensis (type strain SBR5 T ), P. sonchi genomovar Oryzarum (type strain CAS34 T = DSM 102041T; = BR10511T).},
 bibtype = {article},
 author = {Sant'Anna, Fernando H. and Ambrosini, Adriana and de Souza, Rocheli and de Carvalho Fernandes, Gabriela and Bach, Evelise and Balsanelli, Eduardo and Baura, Valter and Brito, Luciana F. and Wendisch, Volker F. and de Oliveira Pedrosa, Fábio and de Souza, Emanuel M. and Passaglia, Luciane M.P.},
 journal = {Frontiers in Microbiology},
 number = {OCT}
}

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