A new group of parasporal inclusions encoded by the S-layer gene ofBacillus thuringiensis
Open Access
- 1 May 2008
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 282 (1), 1-7
- https://doi.org/10.1111/j.1574-6968.2008.01087.x
Abstract
Bacillus thuringiensis produces various groups of active proteins, such as Cyt, Vip and Parasporin, in addition to the Cry protein. In this study we show S-layer proteins to be a new group of parasporal inclusions of B. thuringiensis. The S-layer consists of a two-dimensional lattice structure and is the outermost component of many archaeobacteria and eubacteria. The parasporal inclusion of B. thuringiensis strain CTC was found to be not a typical crystal protein encoded by the cry gene, but a proteinaceous inclusion encoded by the S-layer gene. Furthermore, the CTC-like strains (with their parasporal inclusions coded by the S-layer gene) are widely distributed and accounted for 25.4% of the B. thuringiensis strains tested. These strains constitue a new group of parasporal inclusions encoded by the S-layer gene of B. thuringiensis and shed new light on B. thuringiensis nontoxic strains.Keywords
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