The expression and crystallization of Cry65Aa require two C-termini, revealing a novel evolutionary strategy of Bacillus thuringiensis Cry proteins.
The expression and crystallization of Cry65Aa require two C-termini, revealing a novel evolutionary strategy of Bacillus thuringiensis Cry proteins.
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Cry65Aa的表达和结晶需要两个C端,揭示了苏云金芽孢杆菌Cry蛋白的一种新的进化策略
DOI:
10.1038/srep08291
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发表时间:
2015-02-06
影响因子:
4.6
通讯作者:
Sun M
中科院分区:
文献类型:
--
作者:
Peng DH;Pang CY;Wu H;Huang Q;Zheng JS;Sun M
The insecticidal crystal protein (Cry) genes of Bacillus thuringiensis are a key gene resource for generating transgenic crops with pest resistance. However, many cry genes cannot be expressed or form crystals in mother cells. Here, we report a novel Cry protein gene, cry65Aa1, which exists in an operon that contains a downstream gene encoding a hypothetical protein ORF2. We demonstrated that ORF2 is required for Cry65Aa1 expression and crystallization by function as a C-terminal crystallization domain. The orf2 sequence is also required for Cry65Aa expression, because orf2 transcripts have a stabilizing effect on cry65Aa1 transcripts. Furthermore, we found that the crystallization of Cry65Aa1 required the Cry65Aa1 C-terminus in addition to ORF2 or a typical Cry protein C-terminal region. Finally, we showed that Cry65Aa1 has a selective cytotoxic effect on MDA-MB231 cancer cells. This report is the first description of a 130-kDa mass range Cry protein requiring two C-termini for crystallization. Our findings reveal a novel evolutionary strategy of Cry proteins and provide an explanation for the existence of Cry protein genes that cannot form crystals in B. thuringiensis. This study also provides a potential framework for isolating novel cry genes from “no crystal” B. thuringiensis strains.
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影响因子:
2.2
作者:
Tabashnik, Bruce E.;Van Rensburg, J. B. J.;Carriere, Yves
通讯作者:
Carriere, Yves
DOI:
10.1128/cdli.7.4.625-634.2000
发表时间:
2000-07-01
期刊:
CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY
影响因子:
--
作者:
Mizuki, E;Park, YS;Ohba, M
通讯作者:
Ohba, M
影响因子:
4.4
作者:
KALMAN, S;KIEHNE, KL;YAMAMOTO, T
通讯作者:
YAMAMOTO, T
影响因子:
3.6
作者:
AGAISSE, H;LERECLUS, D
通讯作者:
LERECLUS, D
影响因子:
4
作者:
Peng, D.;Luo, Y.;Sun, M.
通讯作者:
Sun, M.