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    • 31. 发明申请
    • Insect desiccation resistance genes and uses thereof
    • 昆虫干燥抗性基因及其用途
    • US20090124004A1
    • 2009-05-14
    • US12313645
    • 2008-11-21
    • Takahiro KikawadaTakashi OkudaMasahiko WatanabeKazuei MitaKeiko Kadono
    • Takahiro KikawadaTakashi OkudaMasahiko WatanabeKazuei MitaKeiko Kadono
    • C12N15/63C07H21/04C12N5/10
    • C07K14/43563
    • An objective of the present invention is to provide polynucleotides encoding insect desiccation resistance proteins, and uses thereof. cDNA libraries were produced from Polypedilum vanderplanki larvae in a desiccated state, a P. vanderplanki EST database was constructed, and genes encoding LEA proteins were isolated. This resulted in the successful isolation of three types of novel gene encoding LEA-like proteins (PvLEA1, PvLEA2, and PvLEA3.) When secondary structure predictions and motif searches were performed on the proteins deduced from each of the genes, all three proteins had α-helix-rich structures and LEA_4 motifs, which are characteristic of LEA proteins. Moreover, the recombinant proteins synthesized from PvLEA1, 2 and 3 genes were heat soluble even when boiling, so that PvLEA1, 2 and 3 proteins have highly hydrophilic property as well as plant LEA proteins. Therefore, the three isolated genes were found to be novel P. vanderplanki-derived LEA genes. Furthermore, introduction of these PvLEA 1, 2 and 3 genes into animal cells successfully conferred desiccation resistance to the cells. The present invention provides the first example of LEA genes isolated from insects.
    • 本发明的目的是提供编码昆虫耐干燥性蛋白质的多核苷酸及其用途。 在干燥状态下从Polypedilum vanderplanki幼虫生产cDNA文库,构建了P.vanderplanki EST数据库,分离了编码LEA蛋白的基因。 这导致了三种类型的编码LEA样蛋白的新基因(PvLEA1,PvLEA2和PvLEA3)的成功分离。当对从每个基因推导的蛋白进行二级结构预测和基序搜索时,所有三种蛋白都具有α 富含螺旋的结构和LEA_4基序,是LEA蛋白的特征。 此外,由PvLEA1,2和3基因合成的重组蛋白即使在沸腾时也是热溶性的,因此PvLEA1,2和3蛋白具有高亲水性以及植物LEA蛋白。 因此,发现三个分离的基因是新的P. vanderplanki衍生的LEA基因。 此外,将这些PvLEA 1,2和3基因引入动物细胞成功地赋予细胞干燥抗性。 本发明提供了从昆虫分离的LEA基因的第一个实例。