Bacillus thuringiensis Toxins: Functional Characterization and Mechanism of Action
نویسندگان
چکیده
منابع مشابه
Characterization of chimeric Bacillus thuringiensis Vip3 toxins.
Bacillus thuringiensis vegetative insecticidal proteins (Vip) are potential alternatives for B. thuringiensis endotoxins that are currently utilized in commercial transgenic insect-resistant crops. Screening a large number of B. thuringiensis isolates resulted in the cloning of vip3Ac1. Vip3Ac1 showed high insecticidal activity against the fall armyworm Spodoptera frugiperda and the cotton boll...
متن کاملImportant Interactions with Membrane Receptors in the Mode of Action of Bacillus thuringiensis Cry Toxins
4 Bacillus thuringiensis (Bt) is an aerobic, spore-forming bacterium that produces, during the sporulation phase, crystalline inclusions composed of proteins known as δ-endotoxins (3). The δ-endotoxins form two multigenic families, Cry and Cyt toxins. Cry proteins are specifically toxic to several orders of insects: Lepidoptera, Coleoptera, Hymenoptera, Diptera, and to nematodes. In contrast, C...
متن کاملRole of GPI-Anchored Membrane Receptors in the Mode of Action of Bacillus thuringiensis Cry Toxins
Insect pests are the major cause of damage to commercially important agricultural crops. Chemical pesticides have long-term detrimental effects, leading to irreversible damage to the environment and elimination of natural predators. Also, several hundred insect species have developed resistance to one or more chemical insecticides. There is, therefore, a need for environmentally safe pest contr...
متن کاملWhy Bacillus thuringiensis insecticidal toxins are so effective: unique features of their mode of action.
The spore-forming bacterium Bacillus thuringiensis produces intracellular inclusions comprised of protoxins active on several orders of insects. These highly effective and specific toxins have great potential in agriculture and for the control of disease-related insect vectors. Inclusions ingested by larvae are solubilized and converted to active toxins in the midgut. There are two major classe...
متن کاملBacillus thuringiensis subsp. israelensis and Its Dipteran-Specific Toxins
Bacillus thuringiensis subsp. israelensis (Bti) is the first Bacillus thuringiensis to be found and used as an effective biological control agent against larvae of many mosquito and black fly species around the world. Its larvicidal activity resides in four major (of 134, 128, 72 and 27 kDa) and at least two minor (of 78 and 29 kDa) polypeptides encoded respectively by cry4Aa, cry4Ba, cry11Aa, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Toxins
سال: 2020
ISSN: 2072-6651
DOI: 10.3390/toxins12120785