Verma, Ashish and Pal, Yash and Khatri, Indu and Ojha, Anup Kumar and Gruber-Vodicka, Harald and Schumann, Peter and Dastager, Syed and Subramanian, Srikrishna and Mayilraj, Shanmugam and Krishnamurthi, Srinivasan (2017) Examination into the taxonomic position of Bacillus thermotolerans Yang et al., 2013, proposal for its reclassification into a new genus and species Quasibacillus thermotolerans gen. nov., comb. nov. and reclassification of B. encimensis Dastager et al., 2015 as a later heterotypic synonym of B. badius. Systematic and Applied Microbiology, 40 (7). pp. 411-422. ISSN 07232020
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Two novel Gram-staining positive, rod-shaped, moderately halotolerant, endospore forming bacterial strains 5.5LF 38TD and 5.5LF 48TD were isolated and taxonomically characterized from a landfill in Chandigarh, India. The analysis of 16S rRNA gene sequences of the strains confirmed their closest identity to Bacillus thermotolerans SgZ-8T with 99.9% sequence similarity. A comparative phylogenetic analysis of strains 5.5LF 38TD, 5.5LF 48TD and B. thermotolerans SgZ-8T confirmed their separation into a novel genus with B. badius and genus Domibacillus as the closest phylogenetic relatives. The major fatty acids of the strains are iso-C15:0 and iso-C16:0 and MK-7 is the only quinone. The major polar lipids are diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The digital DNA-DNA hybridization (DDH) and ortho average nucleotide identity (ANI) values calculated through whole genome sequences indicated that the three strains showed low relatedness with their phylogenetic neighbours. Based on evidences from phylogenomic analyses and polyphasic taxonomic characterization we propose reclassification of the species B. thermotolerans into a novel genus named Quasibacillus thermotolerans gen. nov., comb. nov with the type strain SgZ-8T (=CCTCC AB2012108T=KACC 16706T). Further our analyses also revealed that B. encimensis SGD-V-25T is a later heterotypic synonym of Bacillus badius DSM 23T.
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright of this article belongs to Elsevier. |
| Uncontrolled Keywords: | 16S rRNA; Bacillus badius; MALDI-TOF; Quasibacillus; Quasibacillus thermotolerans |
| Subjects: | Q Science > QR Microbiology |
| Depositing User: | Dr. K.P.S.Sengar |
| Date Deposited: | 28 Mar 2018 04:25 |
| Last Modified: | 28 Mar 2018 04:25 |
| URI: | http://crdd.osdd.net/open/id/eprint/2039 |
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