The 14-3-3 protein, highly conserved in all eukaryotic cells, is an important regulatory protein. It plays an important role in the growth, amplification, apoptosis, signal transduction, and other crucial life activit...The 14-3-3 protein, highly conserved in all eukaryotic cells, is an important regulatory protein. It plays an important role in the growth, amplification, apoptosis, signal transduction, and other crucial life activities of cells. A eDNA encoding a putative 14-3-3 protein was isolated from cotton fiber eDNA library. The eDNA, designated as Gh14-3-3L （Gossypium hirsutum 14-3-3-like）, is 1,029 bp in length （including a 762 bp long open reading frame and 5＇-/3＇-untranslated regions） and deduced a protein with 253 amino acids. The GhI4-3-3L shares higher homology with the known plant 14-3-3 proteins, and possesses the basic structure of 14-3-3 proteins： one dimeric domain, one phosphoralated-serine rich motif, four CC domains, and one EF Hand motif. Northern blotting analysis showed that Gh14-3-3L was predominantly expressed during early fiber development, and reached to the peak of expression in 10 days post anthers （DPA） fiber cells, suggesting that the gene may be involved in regulating fiber elongation. The gene is also expressed at higher level in both ovule and petal, but displays lower or undeteetable level of activity in other tissues of cotton.展开更多
文摘【目的】构建家蝇Musca domestica酵母双杂交cDNA文库,筛选MD14-3-3互作蛋白。【方法】以家蝇为研究对象,经mRNA纯化、cDNA初级文库构建、重组pGADT7-DEST构建次级文库,构建酵母双杂交筛选系统,构建pGBKT7-MD14-3-3质粒作为诱饵筛选与MD14-3-3相互作用的蛋白,并进行回转验证。【结果】成功构建文库容量为1.6×10^(7) CFU,重组率为100%的家蝇酵母双杂交cDNA文库。酵母双杂交筛选获得2个靶蛋白,回转试验表明mucin-like protein HKR1与抗菌肽ctenidin-1为MD14-3-3的互作蛋白。【结论】从成功构建的家蝇酵母双杂交cDNA文库中筛选出MD14-3-3蛋白的2个互作蛋白,为进一步探究家蝇免疫应答机制奠定了基础。
基金This work was supported by National Program for Basic Research (973 project) of China (No. 2004CB117304), the Ministry of Education of China (No. 104130), National Program for High Technology (863 Project) of China (No. 2005AA220270), and Na-tional Natural Sciences Foundation of China (No. 30470930).
文摘The 14-3-3 protein, highly conserved in all eukaryotic cells, is an important regulatory protein. It plays an important role in the growth, amplification, apoptosis, signal transduction, and other crucial life activities of cells. A eDNA encoding a putative 14-3-3 protein was isolated from cotton fiber eDNA library. The eDNA, designated as Gh14-3-3L （Gossypium hirsutum 14-3-3-like）, is 1,029 bp in length （including a 762 bp long open reading frame and 5＇-/3＇-untranslated regions） and deduced a protein with 253 amino acids. The GhI4-3-3L shares higher homology with the known plant 14-3-3 proteins, and possesses the basic structure of 14-3-3 proteins： one dimeric domain, one phosphoralated-serine rich motif, four CC domains, and one EF Hand motif. Northern blotting analysis showed that Gh14-3-3L was predominantly expressed during early fiber development, and reached to the peak of expression in 10 days post anthers （DPA） fiber cells, suggesting that the gene may be involved in regulating fiber elongation. The gene is also expressed at higher level in both ovule and petal, but displays lower or undeteetable level of activity in other tissues of cotton.
