Isolation and sequence of a 2-kbp miniplasmid from Bacillus thuringiensis var. kurstaki HD-3a3b: Relationship with miniplasmids of other B. thuringiensis strains

6Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The miniplasmid profiles of 18 Bacillus thuringiensis strains belonging to 8 different serotypes were determined using an alkaline hydrolysis method for isolation of low molecular mass plasmids. Nearly all the strains contained covalently closed circular (CCC) DNA species ranging from 2 to 5 species per strain and from 1.5 to 10.5 kbp in size (values corresponding to CCC forms). A 2-kbp plasmid from B. thuringiensis var. kurstaki HD-3a3b futura strain was used in Southern hybridization experiments to analyse relationships among the low molecular mass plasmids of different B. thuringiensis strains. This 2-kbp miniplasmid was present in most strains which show toxicity against lepidoptera. It was not present in those strains toxic against diptera (B. thuringiensis var israelensis) or coleoptera (B. thuringiensis var. tenebrionis). The 2-kbp miniplasmid from B. thuringiensis var. kurstaki HD-3a3b futura was cloned and fully sequenced. Sequence analysis of the 2058 bp of the miniplasmid revealed the presence of an ORF (630 bp, 210 amino acids in size) that is preceded by a consensus sequence of B. thuringiensis crystal protein gene transcription promoters. No significant homology was observed with known B. thuringiensis toxin nucleic acid sequences or with other known sequences. © 1992.

Cite

CITATION STYLE

APA

Marin, R., Tanguay, R. M., Valéro, J., Letarte, R., & Bellemare, G. (1992). Isolation and sequence of a 2-kbp miniplasmid from Bacillus thuringiensis var. kurstaki HD-3a3b: Relationship with miniplasmids of other B. thuringiensis strains. FEMS Microbiology Letters, 94(3), 263–269. https://doi.org/10.1016/0378-1097(92)90641-Z

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free