Listar por tema "Bacillus thuringiensis"
Mostrando ítems 1-20 de 22
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The amino- and carboxyl-terminal fragments of the Bacillus thuringensis Cyt1Aa toxin have differential roles on toxin oligomerization and pore formation
The Cyt toxins produced by the bacteria Bacillus thuringiensis show insecticidal activity against some insects, mainly dipteran larvae, being able to kill mosquitoes and black flies. However, they also possess a general ... -
Bacillus thuringiensis Cyt proteins as enablers of activity of Cry and Tpp toxins against Aedes albopictus
Aedes albopictus is a species of mosquito, originally from Southeast Asia, that belongs to the Culicidae family and the Dipteran insect order. The distribution of this vector has rapidly changed over the past decade, making ... -
Bacillus thuringiensis toxins: an overview of their biocidal activity
Bacillus thuringiensis (Bt) is a Gram positive, spore-forming bacterium that synthesizes parasporal crystalline inclusions containing Cry and Cyt proteins, some of which are toxic against a wide range of insect orders, ... -
Binding of Bacillus thuringiensis subsp. israelensis Cry4Ba to Cyt1Aa has an important role in synergism
Bacillus thuringiensis subsp. israelensis (Bti) produces at least four different crystal proteins that are specifically toxic to different mosquito species and that belong to two non-related family of toxins, Cry and ... -
Domain shuffling between Vip3Aa and Vip3Ca: chimera stability and insecticidal activity against European, American, African, and Asian pests
The bacterium Bacillus thuringiensis produces insecticidal Vip3 proteins during the vegetative growth phase with activity against several lepidopteran pests. To date, three different Vip3 protein families have been identified ... -
Draft genome sequence of Bacillus thuringiensis serovar tolworthi strain Na205-3, an isolate toxic for Helicoverpa armigera
We report here the complete annotated 6,510,053-bp draft genome sequence of Bacillus thuringiensis serovar tolworthi strain Na205-3, which is toxic for Helicoverpa armigera. This strain potentially contains nine insecticidal ... -
Draft genome sequences of two bacillus thuringiensis strains and characterization of a putative 41.9-kDa insecticidal toxin
In this work, we report the genome sequencing of two Bacillus thuringiensis strains using Illumina next-generation sequencing technology (NGS). Strain Hu4-2, toxic to many lepidopteran pest species and to some mosquitoes, ... -
Identificación y producción de proteínas de Bacillus thuringiensis: evaluación de su actividad insecticída
La bacteria entomopatógena Bacillus thuringiensis (Bt) es el microorganismo más empleado actualmente como materia activa en el desarrollo de bioinsecticidas y la construcción de plantas transgénicas (planta Bt) resistentes ... -
Identification and quantification of crystal components of Bacillus thuringiensis strains and their contribution to insecticidal activity
El principal objetivo de esta tesis ha sido desarrollar un método proteómico que permite analizar cualitativa y cuantitativamente las proteínas que componen el cristal producido por distintas cepas silvestres de Bt. El ... -
Incidencia natural de genes vip3 en aislados de Bacillus Thuringiensis procedentes de hábitats terrestres acuáticos
Bacillus thuringiensis (Bt) es el insecticida biológico más aplicado en todo el mundo. Su aislamiento y caracterización es la base de muchos programas de control de plagas en nuevos trabajos. Bt es una bacteria cosmopolita ... -
Microencapsulación de proteínas insecticidas Vip3 de Bacillus thuringiensis
Bacillus thuringiensis es el microorganismo más empleado en el desarrollo de bioinsecticidas, ya que produce proteínas con propiedades insecticidas para distintas plagas. Los objetivos de este trabajo son realizar una ... -
Molecular and insecticidal characterization of a novel cry-related protein from bacillus thuringiensis toxic against Myzus persicae
This study describes the insecticidal activity of a novel Bacillus thuringiensis Cry-related protein with a deduced 799 amino acid sequence (~89 kDa) and ~19% pairwise identity to the 95-kDa-aphidicidal protein (sequence ... -
Multifunctional analysis of new Bacillus thuringiensis strains and their potential as pest control agents
(2023) Tesis doctoral / Doktoretza tesiaEl uso de plaguicidas químicos ha sido la práctica más extendida para el control de plagas en agricultura en los últimos 80 años. Sin embargo, estos tipos de insecticidas han experimentado fuertes medidas regulatorias que ... -
Multifunctional properties of a bacillus thuringiensis strain (BST-122): beyond the parasporal crystal
Chemical products still represent the most common form of controlling crop pests and diseases. However, their extensive use has led to the selection of resistances. This makes the finding of new solutions paramount to ... -
New functions for Cyt proteins and sporulation determinants in Bacillus thuringiensis
(2023) Tesis doctoral / Doktoretza tesiaEn este estudio, primero nos centramos a encontrar nuevas proteínas insecticidas y factores sinérgicos con actividad contra larvas de A. albopictus. Nuestro primer objetivo, fue caracterizar la actividad individual de ... -
Novel Bacillus thuringiensis cry genes and their insecticidal potency against Coleoptera
(2020) Tesis doctoral / Doktoretza tesiaBacillus thuringiensis (Bt) se distingue de otras bacterias del género Bacillus por su capacidad de sintetizar d-endotoxinas (Cry y Cyt) que característicamente se agregan formando uno o más cristales paraesporales. Todas ... -
Potential of Cry10Aa and Cyt2Ba, two minority δ-endotoxins produced by Bacillus thuringiensis ser. israelensis, for the control of Aedes aegypti larvae
Bacillus thuringiensis ser. israelensis (Bti) has been widely used as microbial larvicide for the control of many species of mosquitoes and blackflies. The larvicidal activity of Bti resides in Cry and Cyt δ-endotoxins ... -
Potential of the Bacillus thuringiensis toxin reservoir for the control of Lobesia botrana (Lepidoptera: tortricidae), a major pest of grape plants
The potential of Bacillus thuringiensis Cry proteins to control the grape pest Lobesia botrana was explored by testing first-instar larvae with Cry proteins belonging to the Cry1, Cry2, and Cry9 groups selected for ... -
A strain of Bacillus thuringiensis containing a novel cry7Aa2 gene that is toxic to Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae)
The genome of the Bacillus thuringiensis BM311.1 strain was sequenced and assembled in 359 contigs containing a total of 6,390,221 bp. The plasmidic ORF of a putative cry gene from this strain was identified as a potential ... -
Susceptibilidad de Blattella germanica (L.) (Dictyoptera, Blattellidae) y Blaptica dubia (Blattodea, Blaberidae) a proteínas de Bacillus thuringiensis (Berliner)
La cucaracha alemana (Blattella germanica) es una especie distribuida por todo el mundo que habita en ambientes urbanos y es portadora de patógenos humanos. Por su gran capacidad para desarrollar resistencias frente a ...