Efficient TALEN construction for Bombyx mori gene targeting.

Efficient TALEN construction for Bombyx mori gene targeting.
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DOI:
10.1371/journal.pone.0073458
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Zurovec M
Zurovec M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Takasu Y;Sajwan S;Daimon T;Osanai-Futahashi M;Uchino K;Sezutsu H;Tamura T;Zurovec M

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工程化核酸酶是能够在所需基因组位置引入双链断裂的人工酶。双链断裂启动非同源末端连接(NHEJ)的易错修复过程,其最终导致在靶位点处诱导突变。我们先前表明ZFN和TALEN能够诱导B中的NHEJ突变。桑基因组为了优化我们的诱变方案,我们修改了一种已报道的截短TALEN支架,并对其进行了优化以用于B。桑胚我们还建立了一个新的B。mori体细胞测定法适用于直接在B中预选高效TALEN。Mori模型系统我们使用BmBLOS 2基因比较了基于三种不同框架的几种TALEN对的效率。新的活性TALEN显示出比我们以前使用的效率高一个数量级。我们证实了我们的改进方案的效用,通过诱变的常染色体基因,红卵(Bm-re),并表明,它允许获得纯合突变体在G1。我们的手术将B失败的可能性降到最低。mori基因打靶实验。
Engineered nucleases are artificial enzymes able to introduce double stranded breaks at desired genomic locations. The double stranded breaks start the error-prone repair process of non-homologous end-joining (NHEJ), which eventually leads to the induction of mutations at target sites. We showed earlier that ZFNs and TALENs are able to induce NHEJ mutations in the B. mori genome. In order to optimize our mutagenesis protocol, we modified one of the reported truncated TALEN scaffolds and optimized it for use in the B. mori embryo. We also established a novel B. mori somatic cell assay suitable for the preselection of highly efficient TALENs directly in the B. mori model system. We compared the efficiency of several TALEN pairs based on three different frameworks using the BmBLOS2 gene. The new active TALENs show one order of magnitude higher efficiency than those we used previously. We confirmed the utility of our improved protocol by mutagenesis of the autosomal gene, red egg (Bm-re) and showed that it allows obtaining homozygous mutants in G1. Our procedure minimizes the chance of failure in B. mori gene targeting experiments.
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