Regulation of cry Gene Expression in Bacillus thuringiensis
نویسندگان
چکیده
منابع مشابه
Regulation of cry Gene Expression in Bacillus thuringiensis
Bacillus thuringiensis differs from the closely related Bacillus cereus group species by its ability to produce crystalline inclusions. The production of these crystals mainly results from the expression of the cry genes, from the stability of their transcripts and from the synthesis, accumulation and crystallization of large amounts of insecticidal Cry proteins. This process normally coincides...
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Twelve local B. thuringiensis strains are used in the study, which previously isolated from the soil of seven governorates and characterized by their high toxicity against 2 instars larvae of cotton nd leafworm (Spodoptera littoralis). The PCR amplification analysis of the 12 Bt isolates revealed the presence of amplified fragments characteristic of five different cry genes. Results showed the ...
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Bacillus thuringiensis is an insect pathogen that has been used widely as a biopesticide. Here, we report the genome sequence of strain 407 Cry-, which is used to study the genetic determinants of pathogenicity. The genome consists of a 5.5-Mb chromosome and nine plasmids, including a novel 502-kb megaplasmid.
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Insecticidal Cry proteins produced by Bacillus thuringiensis are use worldwide in transgenic crops for efficient pest control. Among the family of Cry toxins, the three domain Cry family is the better characterized regarding their natural evolution leading to a large number of Cry proteins with similar structure, mode of action but different insect specificity. Also, this group is the better ch...
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Since the first X-ray structure of Cry3Aa was revealed in 1991, numerous structures of B. thuringiensis toxins have been determined and published. In recent years, functional studies on the mode of action and resistance mechanism have been proposed, which notably promoted the developments of biological insecticides and insect-resistant transgenic crops. With the exploration of known pore-formin...
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ژورنال
عنوان ژورنال: Toxins
سال: 2014
ISSN: 2072-6651
DOI: 10.3390/toxins6072194