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首页> 外文期刊>Genes & Genetic Systems >Knockout of glutelin genes which form a tandem array with a high level of homology in rice by gamma irradiation
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Knockout of glutelin genes which form a tandem array with a high level of homology in rice by gamma irradiation

机译:通过γ射线辐射在水稻中形成具有高度同源性的串联排列的谷蛋白基因的敲除

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In the course of evolution, a gene is often duplicated in tandem, resulting in a functional redundancy. The analysis of function of these genes by raising double mutant might be difficult because they are very tightly linked. We described here a mutant of such a tandem duplicated gene. glu1 is a gamma-ray-induced rice mutant, which lacks an acidic subunit of glutelin, a major seed storage protein. We found that glu1 harbors a 129.7-kb deletion involving two highly similar and tandem repeated glutelin genes, GluB5 and GluB4. The deletion eliminated the entire GluB5 and GluB4 gene except half of the first exon of GluB5. GluB5 and GluB4 have the same amino acid sequence in the acidic subunit, suggesting that only the mutation involving both GluB5 and GluB4 results in the lack of the glutelin acidic subunit deleted in glu1. Our finding suggests that gamma-ray can be an effective mutagen to analyze tandem repeated and functionally redundant genes.
机译:在进化过程中,基因经常串联复制,导致功能冗余。通过产生双突变体来分析这些基因的功能可能很困难,因为它们之间的联系非常紧密。我们在这里描述了这种串联重复基因的突变体。 glu1是伽马射线诱导的水稻突变体,它缺少谷蛋白的酸性亚基,谷蛋白是主要的种子贮藏蛋白。我们发现,glu1包含一个129.7-kb的缺失,涉及两个高度相似和串联重复的谷蛋白基因GluB5和GluB4。该缺失消除了整个GluB5和GluB4基因,除了GluB5的第一个外显子的一半。 GluB5和GluB4在酸性亚基中具有相同的氨基酸序列,这表明仅涉及GluB5和GluB4的突变会导致缺少在glu1中缺失的谷蛋白酸性亚基。我们的发现表明,伽马射线可能是一种有效的诱变剂,可以分析串联重复的和功能上冗余的基因。

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