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Aedes aegypti alkaline phosphatase ALP1 is a functional receptor of Bacillus thuringiensis Cry4Ba and Cry11Aa toxins.

Abstract：

:Bacillus thuringiensis subs. israelensis produces at least three Cry toxins (Cry4Aa, Cry4Ba, and Cry11Aa) that are active against Aedes aegypti larvae. Previous work characterized a GPI-anchored alkaline phosphatase (ALP1) as a Cry11Aa binding molecule from the gut of A. aegypti larvae. We show here that Cry4Ba binds ALP1, and that the binding and toxicity of Cry4Ba mutants located in loop 2 of domain II is correlated. Also, we analyzed the contribution of ALP1 toward the toxicity of Cry4Ba and Cry11Aa toxins by silencing the expression of this protein though RNAi. Efficient silencing of ALP1 was demonstrated by real-time quantitative PCR (qPCR) and Western blot. ALP1 silenced larvae showed tolerance to both Cry4Ba and Cry11Aa although the silenced larvae were more tolerant to Cry11Aa in comparison to Cry4Ba. Our results demonstrate that ALP1 is a functional receptor that plays an important role in the toxicity of the Cry4Ba and Cry11Aa proteins.

journal_name

Insect Biochem Mol Biol

journal_title

Insect biochemistry and molecular biology

authors

Jiménez AI,Reyes EZ,Cancino-Rodezno A,Bedoya-Pérez LP,Caballero-Flores GG,Muriel-Millan LF,Likitvivatanavong S,Gill SS,Bravo A,Soberón M

doi

10.1016/j.ibmb.2012.06.001

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

683-9

issue

9

eissn

0965-1748

issn

1879-0240

pii

S0965-1748(12)00077-X

journal_volume

42

pub_type

杂志文章

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