Bacillus thuringiensis Cry2Ab is active on Anopheles mosquitoes: single D block exchanges reveal critical residues involved in activity.
Bacillus thuringiensis Cry2Ab is active on Anopheles mosquitoes: single D block exchanges reveal critical residues involved in activity.
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苏云金芽孢杆菌 Cry2Ab 对按蚊有活性:单个 D 块交换揭示了参与活性的关键残基。
DOI:
10.1111/j.1574-6968.2011.02403.x
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发表时间:
2011
影响因子:
2.1
通讯作者:
Dean,DonaldH
中科院分区:
文献类型:
--
作者:
McNeil,BetinaC;Dean,DonaldH
Cry2Aa exhibits dual activity to Lepidoptera and Diptera. Cry2Ab differs in amino acid sequence from Cry2Aa by 13% and has shown significant lepidopteran activity, but no mosquitocidal activity. Previous studies implicate 23 Cry2Aa specificity-conferring residues of domain II, which differ in Cry2Ab. Nine residues are putatively involved in conferring Cry2Aa dipteran specificity. To explore Cry2Ab dipteran toxicity, site-directed mutagenesis was employed to exchange Cry2Ab residues with Cry2Aa D (dipteran) block residues. Cry2Ab wild type demonstrated high toxicity (LC50of 540 ng mL−1) toAnopheles gambiae, but not toAedesorCulex, within a 24-h time period. Cry2Ab should be reclassified as a dual active Cry toxin. Cry2Ab mutagenesis revealed critical residues for Cry2Ab protein function, as well as enhanced activity against the malarial mosquito,An. gambiae.
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影响因子:
2.4
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影响因子:
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作者:
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作者:
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Dean DH
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