砂糖桔全长cDNA文库的构建及病程相关蛋白基因的克隆与分析
为从分子水平上了解影响砂糖桔生理代谢、生长发育、病虫害抗性和品质的众多基因,以无籽砂糖桔幼叶为材料,应用SMART技术构建了cDNA文库,检测文库发现其库容量达到1.36×10^6,重组率为95%,插入片段绝大多数分布在0.6~2kb之间,有36%的插入片段是全长cDNA。随机挑选224个克隆进行测序,获得了1个病程相关蛋白基因的全长cDNA序列。将基因序列提交GenBank,编号为KJ000019。基因的CDS长429bp,5’UTR为43bp,3’UTR为235bp,编码长度为143个氨基酸残基的蛋白。基因位于第8染色体上,有1个长度为193bp的内含子,基因编码的蛋白质分子量为15.4k...
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| Published in | 广东农业科学 Vol. 42; no. 16; pp. 89 - 95 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
肇庆学院果树研究所/肇庆学院生命科学学院,广东肇庆,526061
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-874X |
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| Summary: | 为从分子水平上了解影响砂糖桔生理代谢、生长发育、病虫害抗性和品质的众多基因,以无籽砂糖桔幼叶为材料,应用SMART技术构建了cDNA文库,检测文库发现其库容量达到1.36×10^6,重组率为95%,插入片段绝大多数分布在0.6~2kb之间,有36%的插入片段是全长cDNA。随机挑选224个克隆进行测序,获得了1个病程相关蛋白基因的全长cDNA序列。将基因序列提交GenBank,编号为KJ000019。基因的CDS长429bp,5’UTR为43bp,3’UTR为235bp,编码长度为143个氨基酸残基的蛋白。基因位于第8染色体上,有1个长度为193bp的内含子,基因编码的蛋白质分子量为15.4ku,等电点为6.96。该蛋白N端含有长度约为22aa的信号肽序列,指导蛋白分泌到细胞外;剩余部分是一个典型的Barwin保守结构域,具有几丁质酶的活性,在受到细菌、真菌侵染时可以分解部分真菌和细菌的细胞壁,发挥抗病作用。 |
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| Bibliography: | 44-1267/S Citrus flamea Hort. ex Tseng. Shiyueju; cDNA library; pathogenesis-related protein To better understand the molecular mechanisms underlying metabolism, development, disease resistance and quality of citrus, we constructed a full-length cDNA library from Citrus Shatangiu ( seedless ) by using SMARTTM technology. This high quality cDNA library featured as a storage capacity of 1.36 × 10^6 with more than 95% recombinant, containing a wide range of insert size from 0.6-2 kb. 224 clones were randomly picked up from the library and sequenced, 36% of the clones were full length cDNAs. One of them, pathogenesis-related protein gene was submitted to GenBank with accesses number KJ000019. Bioinformatics analysis found that the full-length of pathogenesis-related protein cDNA was 707 bp, with a CDS of 459 bp, a 43 bp 5' UTR and a 235 bp 3' UTR, encoding a protein with 143 amino acid residues, the corresponding genomic sequence contained one intron with 193 bp. The molecular weight of the protein was 15.4 ku, wit |
| ISSN: | 1004-874X |