文献类型: 外文期刊
第一作者: Yan, Bo-Wen
作者: Yan, Bo-Wen;Zhao, Yao-Feng;Li, Ning;Gou, Ke-Mian;Cao, Wen-Guang
作者机构:
关键词: Arabidopsis thaliana;Illegitimate recombination;Microhomology;Mouse;Random integration;Transgenic
期刊名称:TRANSGENIC RESEARCH ( 影响因子:2.788; 五年影响因子:2.377 )
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收录情况: SCI
摘要: Little is known about how foreign DNA is randomly integrated into chromosomes in transgenic animals. In the current study, the insertion sites of 36 transgenic mice were mapped by thermal asymmetric interlaced PCR, and 38 junction sequences were obtained from 30 samples. Analysis of the 38 sequences revealed that 44.7 % of integration events occurred within host gene regions, including 13.2 % (5/38) in exonic regions and 31.6 % (12/38) in intronic regions. The results also revealed that all non-end side integrations of foreign DNA were mediated by short sequence homologies (microhomologies) and that the end side integrations occurred in the presence or absence of microhomologies. In addition, microhomology-mediated mechanisms were also confirmed in four transgenic Arabidopsis thaliana lines. The results indicate that foreign DNA is easily integrated into host gene regions. These results also suggest that the integration of both ends of foreign DNA follows the above-mentioned mechanism in many transgenic/transformed organisms.
分类号: R394
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