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Restriction analysis and partial sequencing of the 16S rRNA gene as index for rapid identification of Bacillus species

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Abstract

Restriction fragment length analysis of PCR amplified 16S rDNA with AluI revealed the presence of a 265 bp fragment in all species of Bacillus with the exception of B. cereus and B. thuringiensis, which contains two restriction sites within this fragment which results in three smaller fragments totalling to 265 bp. Some distant species of Bacillus with no evidence of this fragment could be delineated into other genera based on phenotypic and genotypic parameters. BLAST search for homologous sequences of individual species revealed that it is a highly conserved region. Multiple alignment of the fragment suggests that a region between 160 and 265 bp of the 265 bp fragment was a hypervariable region and were highly species-specific. A set of primers was designed for amplification of this hypervariable region. Partial sequencing of the hypervariable region within the 265 bp fragment seems an index for identification of Bacillus species.

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Acknowledgments

The study was supported by the grant from Indian Council of Agricultural Research (ICAR) Network Project, Government of India, New Delhi, India. Authors are grateful to the funding agency and thanks to Mr. R. N. Singh for his technical help.

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Correspondence to S. Vardhan.

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Vardhan, S., Kaushik, R., Saxena, A.K. et al. Restriction analysis and partial sequencing of the 16S rRNA gene as index for rapid identification of Bacillus species. Antonie van Leeuwenhoek 99, 283–296 (2011). https://doi.org/10.1007/s10482-010-9487-4

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  • DOI: https://doi.org/10.1007/s10482-010-9487-4

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