6533b85bfe1ef96bd12bb4ab
RESEARCH PRODUCT
The Independent Biological Activity of Bacillus thuringiensis Cry23Aa Protein Against Cylas puncticollis
Patricia Hernández-martínezAscensión Andrés-garridoBaltasar EscricheKatterine PrenticeGuy SmaggheNatalia Mara Vera-velascoAyda KhorramnejadAyda Khorramnejadsubject
Microbiology (medical)Agriculture and Food SciencesSWEET-POTATO WEEVILlcsh:QR1-502sweet potato weevilsbinary toxinMicrobiologylcsh:Microbiology03 medical and health sciencesmode of actioninsecticidal proteinsBacillus thuringiensisBioassayCry37AaBinding siteSPHAERICUS TOXINMode of action030304 developmental biologybinding assay0303 health sciencesPore-forming toxinLarvabiology030306 microbiologyCRYSTAL PROTEINCOMPONENTSfungiMidgutBiological activityBORDER MEMBRANE-VESICLESENTOMOPATHOGENIC FUNGIbiology.organism_classificationEFFICACYBiochemistrybioassayCOLEOPTERABRUNNEUSRESISTANCEdescription
The Cry23Aa/Cry37Aa proteins from Bacillus thuringiensis (Bt) have been described toxic to Cylas puncticollis larvae. In general, it is believed that Cry23Aa and Cry37Aa act jointly to exert the insecticidal activity, while there is no evidence of their toxicity individually. Therefore, in the present study, the contribution of each protein in the insecticidal activity toward C. puncticollis larvae has been assessed. The results showed that both proteins were toxic for C. puncticollis larvae when tested individually. Contrary to what was claimed previously, our results suggest that the presence of both proteins is not necessary to exert toxicity against C. puncticollis larvae. Also, the binding behavior of Cry23Aa protein to midgut receptors of C. puncticollis larvae has been determined. According to our results, Cry23Aa binds to C. puncticollis brush border membrane vesicles (BBMV) specifically and independently of Cry37Aa. Due to the lack of common binding sites, Cry23Aa can be pyramided with Cry3Aa protein for better management of C. puncticollis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-07-01 | Frontiers in Microbiology |