Enterococcus pingfangensis sp. nov., Enterococcus dongliensis sp. nov., Enterococcus hulanensis sp. nov., Enterococcus nangangensis sp. nov. and Enterococcus songbeiensis sp. nov., isolated from Chinese traditional pickle juice

Abstract

Five novel lactic acid bacterial strains, isolated from Chinese traditional pickle juice, were characterised by a polyphasic approach, including 16S rRNA gene sequence analysis, <i>pheS</i> gene sequence analysis, <i>rpoA</i> gene sequence analysis, determination of DNA G+C content, average nucleotide identity (ANI) analysis, <i>in silico</i> DNA-DNA hybridisation (<i>is</i>DDH), fatty acid methyl ester (FAME) analysis and an analysis of phenotypic features. Strains 241-2-2^T, 63-4^T and 190-7^T were closely related to the type strains of <i>Enterococcus devriesei</i>, <i>Enterococcus viikkiensis</i>, <i>Enterococcus pseudoavium</i>, <i>Enterococcus xiangfangensis</i>, <i>Enterococcus avium</i>, <i>Enterococcus malodoratus</i>, <i>Enterococcus raffinosus</i> and <i>Enterococcus gilvus</i>, having 99.1-99.9 % 16S rRNA gene sequence similarities. Strain 94-2^T was distantly related to the type strains of <i>Enterococcus phoeniculicola</i>, <i>Enterococcus rivorum</i> and <i>Enterococcus faecalis</i>, having 95.2-96.1 % 16S rRNA gene sequence similarities. Strain 85-4^T was distantly related to the type strains of <i>Enterococcus casseliflavus</i>, <i>Enterococcus gallinarum</i>, <i>Enterococcus dispar</i>, <i>Enterococcus canintestini</i>, <i>Enterococcus saigonensis</i>, <i>Enterococcus diestrammenae</i>, <i>Enterococcus asini</i>, <i>Enterococcus cecorum</i> and <i>Enterococcus columbae</i>, having 95.7-97.8 % 16S rRNA gene sequence similarities. Less than 91.5 % ANI and 45.3 % <i>is</i>DDH values between strains 241-2-2^T, 63-4^T, 190-7^T, 94-2^T, 85-4^T and type strains of phylogenetically related species showed that they represent five new species within the genus <i>Enterococcus</i>. Based upon the data of polyphasic characterisation obtained in the present study, five novel species, <i>Enterococcus pingfangensis</i> sp. nov., <i>Enterococcus dongliensis</i> sp. nov., <i>Enterococcus hulanensis</i> sp. nov., <i>Enterococcus nangangensis</i> sp. nov. and <i>Enterococcus songbeiensis</i> sp. nov., are proposed and the type strains are 241-2-2^T (=NCIMB 15185^T=CCM 8921^T=LMG 31181^T), 63-4^T (=NCIMB 15178^T=CCM 8922^T), 190-7^T (=NCIMB 15200^T=CCM 8949^T), 94-2^T (=NCIMB 15180^T=CCM 8920^T=LMG 31180^T) and 85-4^T (=NCIMB 15179^T=CCM 8923^T=LMG 31183^T), respectively.