中文摘要：

目的筛选并鉴定埃及伊蚊（Aedes aegypti）全基因组中的yellow基因，分析其基因结构、基因进化以及在不同发育时期和不同组织的表达谱。方法运用模式昆虫黑腹果蝇（Drosophila melanogaster）Dm-yellow基因（GenBank登录号为AAF45497）王浆主蛋白（MRJP）结构域氨基酸序列，在埃及伊蚊全基因组数据库中筛选并鉴定埃及伊蚊yell0叫基因家族．采用ExPASy在线相关工具包分析其理化性质和结构域，运用SignalP4．1预测信号肽．结合使用DNAstar、MAGA6．0和GeneDoc软件包进行同源性比对、保守性分析和系统进化树构建。提取埃及伊蚊总RNA，合成cDNA，利用实时荧光定量PCR（qRT—PCR）法对埃及伊蚊不同发育时期（卵、I～Ⅳ龄幼虫、蛹以及未吸血雌蚊和雄蚊）和未吸血雌蚊不同组织（唾液腺、中肠、脂肪体和卵巢）的yellow基因表达谱进行相对定量分析。结果 从埃及伊蚊全基因组中筛选出12条yellow基因（Aa-一yellow、Aa一yellow—b、Aa一yellow—c、Aa一yellow—d、Aa-yellow—e、Aa一yellow-f2、Aa—yellow-fb、Aa一yellow-fc、Aa—yellow—g、Aa—yellow—g2、Aa—yellow—h和Aa一fellow—x）。生物信息学分析结果显示，12条yellow基因均具有MRJP结构域和信号肽序列。同源性比对结果显示．埃及伊蚊yellow基因家族成员间同源性较低，为15％～49％：但其保守域间同源性较高，可达60％。系统进化树分析结果显示．12个yellow蛋白分为5个亚家族，其中11个在黑腹果蝇中均有直系同源蛋白存在。ⅡRT．PCR结果显示，An—yellow-d和Aa-yelloW一Ⅳ在雄蚊中高表达（P〈0．01或P〈O．05），相对表达量分别为0．0189和0．0235；Aa一yelloW一尼在雌蚊和唾液腺中特异高表达（P〈0．01），相对表达量分别为0．0248和0．0349；Aa一yellow-f2在Ⅱ龄幼虫中特异高表达（P〈0．01），相对表达量为0．0934；Aa一yellow、Aa—yellow—e和Aa—yellow一?

英文摘要：

Objective To identify the yellow family genes in Aedes aegypti and analyze the gene structure, phylogenetie evolution and their expression at various developmental stages and in different tissues. Methods The yellow gene family was identified in Ae. aegypti by blasting the Ae. aegypti genome database with the amino acid sequence of the MRJP domain of Din-yellow gene of Drosophila melanogaster（GenBank No. AAF45497）. The physicochemical property and domains were analyzed with the on-line ExPaSy software. The signal peptide was predicted using SignalP4.1 software. Sequence alignment and the phylogenetic tree were made through combined use of DNAstar, MEGA6.0 and GeneDoe. Total RNA was extracted from Ae. aegypti, cDNA was generated, and expression of the yellow family genes at various developmental stages （egg, first to fourth instar, pupa, non-blood-fed female and male mosquitoes） and in different tissues （salivary gland, midgut, fat body, and ovary） was quantified using qRT-PCR. Results Twelve yellow genes were identified from Ae. aegypti genome： Aa-yellow, Aa-yellow-b, Aa-yellow-c, Aa-yellow-d, Aa-yellow-e, Aa-yellow-f2, Aa-yeUow-fb, Aa-yellow-fc, Aa-yeUow-g, Aa-yellow-g2, Aa-yellow-h, and Aa-yellow-x. Bioinformatics demonstrated that all covered the MRJP domain and a signal peptide sequence. Sequence alignment revealed low （15%-49%） homology among the proteins, but high homology（60%） in the conserved domain. According to the phylogenetic tree analysis, the encoded 12 YELLOW proteins were classified into 5 subfamilies, and 11 had orthologues in D. melanogaster, qRT-PCR revealed high expression of Aa-yellow-d （0.018 9） and Aa-yellow-x （0.023 5） in male Ae. aegypti （P〈0.01 or P〈0.05）; high expression of Aa-yellow-fc （0.024 8, 0.034 9） in female Ae. aegypti and in the salivary gland （P〈0.01）; high expression of Aa-yellow-f2 （0.093 4） in the second instar stage （P〈0.01）; high expression of Aa-yellow （0.562 1）, Aa-yellow-e （0.004 4）, and Aa-yellow-fo （