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Molecular and Insecticidal Characterization of a Novel Cry-Related Protein from Bacillus Thuringiensis Toxic against Myzus persicae

AutorPalma, Leopoldo ; Muñoz, Delia ; Berry, Colin; Murillo, Jesús; Ruiz de Escudero, Íñigo ; Caballero, Primitivo
Fecha de publicación6-nov-2014
EditorMultidisciplinary Digital Publishing Institute
CitaciónToxins 6 (11): 3144-3156 (2014)
ResumenThis study describes the insecticidal activity of a novel <i>Bacillus thuringiensis</i> Cry-related protein with a deduced 799 amino acid sequence (~89 kDa) and ~19% pairwise identity to the 95-kDa-aphidicidal protein (sequence number 204) from patent US 8318900 and ~40% pairwise identity to the cancer cell killing Cry proteins (parasporins Cry41Ab1 and Cry41Aa1), respectively. This novel Cry-related protein contained the five conserved amino acid blocks and the three conserved domains commonly found in 3-domain Cry proteins. The protein exhibited toxic activity against the green peach aphid, <i>Myzus persica</i>e (Sulzer) (Homoptera: Aphididae) with the lowest mean lethal concentration (LC<sub>50</sub> = 32.7 μg/mL) reported to date for a given Cry protein and this insect species, whereas it had no lethal toxicity against the Lepidoptera of the family Noctuidae <i>Helicoverpa armigera </i>(Hübner), <i>Mamestra brassicae </i>(L.), <i>Spodoptera exigua </i>(Hübner), <i>S. frugiperda</i> (J.E. Smith) and <i>S. littoralis </i>(Boisduval), at concentrations as high as ~3.5 μg/cm<sup>2</sup>. This novel Cry-related protein may become a promising environmentally friendly tool for the biological control of <i>M. persicae</i> and possibly also for other sap sucking insect pests.
Versión del editorhttps://doi.org/10.3390/toxins6113144
URIhttp://hdl.handle.net/10261/153592
DOI10.3390/toxins6113144
Identificadoresdoi: 10.3390/toxins6113144
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