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马氏珠母贝TLR2基因cDNA的分子特征及组织表达分析     被引量:6

Molecular Characterization and Tissue Expression Analysis of PmTLR2 Gene from Pinctada martensii

文献类型:期刊文献

中文题名:马氏珠母贝TLR2基因cDNA的分子特征及组织表达分析

英文题名:Molecular Characterization and Tissue Expression Analysis of PmTLR2 Gene from Pinctada martensii

作者:师尚丽[1];杜晓东[1];焦钰[1];黄荣莲[1];王庆恒[1];邓岳文[1]

机构:[1]广东海洋大学水产学院

年份:2014

卷号:30

期号:20

起止页码:35

中文期刊名:中国农学通报

外文期刊名:Chinese Agricultural Science Bulletin

收录:CSTPCD、、CSCD_E2013_2014、CSCD

基金:国家自然科学基因"基于珍珠贝基因组测序分析的珍珠形成矿化关键基因和蛋白质的研究"(31272635);广东省自然科学基金"马氏珠母贝珍珠质形成相关microRNA的鉴定与功能研究"(S2012040008042)

语种:中文

中文关键词:TLR2;马氏珠母贝;基因克隆;荧光定量PCR

外文关键词:PmTLR2; Pinctada martensii; gene clone; Real-time PCR

中文摘要:TLR2(toll like receptor 2)是TLR模式识别受体家族的重要成员之一,参与有机体的免疫识别。研究采用cDNA末端快速扩增(RACE)技术克隆获得了马氏珠母贝(Pinctada martensii)TLR2基因(PmTLR2)cDNA的全长序列并对其序列特征进行分析;同时检测了PmTLR2基因的mRNA在马氏珠母贝六个组织中的表达。结果表明:PmTLR2基因的cDNA全长2614 bp,包含41 bp的5’UTR,299 bp的3’UTR,23 bp的polyA,开放阅读框为2274 bp,编码758个氨基酸残基。多序列比对显示PmTLR2与牡蛎TLR2的序列相似性最高,为51%;Smart软件分析显示PmTLR2的蛋白序列中含有8个亮氨酸重复序列(Leucine rich repeats,LRRs),1个C端亮氨酸富集区(Leucine-rich repeat C-terminal,LRR-CT),1个N端亮氨酸富集区(Leucine-rich repeat N-terminal,LRR-NT),1个(Toll/IL-1R)同源结构域(TIR);荧光定量PCR分析表明PmTLR2在马氏珠母贝肝胰脏、性腺、血淋巴、鳃、外套膜和闭壳肌六个组织中均有表达,鳃中表达量最高。本研究为进一步阐述PmTLR2在马氏珠母贝免疫应答中的作用机制提供理论基础。

外文摘要:Toll like receptor 2 (TLR2) is an important component in the TLRs family, which is one tamily ot pathogen-associated molecular pattern recognizing receptors (PRRs). In this study, using rapid amplification of cDNA ends technology (RACE), the authors obtained the full length of PmTLR2 gene cDNA from Pinctada martensii (PmTLR2). The full length of PmTLR2 cDNA was 2614 bp, containing a 5' untranslated region (UTR) of 41 bp and a 3' UTR of 299 bp with 27 bp polyA tail. The open reading frame (ORF) was 2274 bp encoding 758 amino acid residues. Multiple sequence alignment indicated PmTLR2 had 51% sequence identity with that from Crassostrea gigas. SMART program analysis indicated PmTLR2 contained eight Leucine rich repeats (LRRs), one Leucine-rich repeat C-terminal (LRR-CT), one Leucine-rich repeat N-terminal (LRR-NT) and one TIR (Toll/IL-1R). Real-time PCR analysis demonstrated that PmTLR2 was constitutively expressed in all studied tissues (adductor muscle, gonad, hepatopancreas, mantle, hemocytes and gill) in P.martensii with the most abundant mRNA in the gill. These studies provide the basis for the further study of PmTLR2 in the immune response in mollusk.

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