Abstract
Two novel Gram-stain negative facultative anaerobic, motile, rod-shaped bacterial strains IG-V01T and IG-V01b were isolated from the gut of red flour beetles, Tribolium castaneum. The 16S rRNA gene sequences of strains IG-V01T and IG-V01b were found to have their highest sequence similarity (96.5 % and 96.4 %) with Serratia nematodiphila DZ0503SBS1T (Enterobacteriaceae family) respectively. Strains IG-V01T and IG-V01b share 100 % 16S rRNA gene sequence similarity and exhibit very similar phenotypic characteristics. In addition, they show 89.7 % genomic relatedness (DNA–DNA hybridisation). Major fatty acids were identified to be C16:0 (38.3 %), C17:0 cyclo (19.5–20 %) and C14:0 (11.2–11.3 %). Cells contain phosphatidylethanolamine and diphosphatidylglycerol as predominant polar lipids. Genomic DNA G+C content (mol%) was determined to be 51.5–51.7. A polyphasic approach employing the study of morphological, physiological, chemotaxonomic, genomic and phylogenetic analysis revealed that the two newly isolated strains cannot be placed in any of the existing genera of the family Enterobacteriaceae. Therefore, it is proposed that strains IG-V01T and IG-V01b belong to a novel genus within the family Enterobacteriaceae, and represent a new species Enterobacillus tribolii gen. nov., sp. nov., with the type strain =IG-V01T = KCTC 42159T = MCC 2532T.
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Acknowledgments
This work was supported by the Department of Biotechnology (DBT), Government of India under the project ‘‘Establishment of Microbial Culture Collection’’ (Grant no. BT/PR/0054/NDB/52/94/2007). We acknowledge Dr. Neetha Joseph and Prachi Karodi for FAME analysis and assistance in biochemical tests respectively. Dr. Praveen Rahi is acknowledged for ribosomal protein profiling by MALDI-TOF (MS). Mr. Dhananjay P. Patil is acknowledged for his assistance during initial isolation. We thank Dr. Bernhand Schink for etymology of the novel genus and species. Dr. Tapan Chakrabarti is acknowledged for valuable suggestions in the discussion section and etymology.
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Vikas S. Patil and Rahul C. Salunkhe have equally contributed to the manuscript.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA, rpoB and gyrB gene sequences of strains IG-V01T and IG-V01b are HG972968, LM993265, LM993263 and LK934679, LM993266, LM993264 respectively.
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Patil, V.S., Salunkhe, R.C., Patil, R.H. et al. Enterobacillus tribolii gen. nov., sp. nov., a novel member of the family Enterobacteriaceae, isolated from the gut of a red flour beetle, Tribolium castaneum . Antonie van Leeuwenhoek 107, 1207–1216 (2015). https://doi.org/10.1007/s10482-015-0412-8
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DOI: https://doi.org/10.1007/s10482-015-0412-8