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Position: Home > Articles > Molecular cloning of troponin I gene from the hard tick Rhipicephalus haemaphysaloides and its distribution in it Chinese Journal of Veterinary Science 2008,28 (2) 160-162,169

镰形扇头蜱肌钙蛋白I基因的克隆及其分布

作  者:
马腾;周勇志;向飞宇;沈杰;周金林
单  位:
中国农业科学院上海兽医研究所
关键词:
蜱;镰形扇头蜱;肌钙蛋白I
摘  要:
本试验从镰形扇头蜱半饱血雌蜱唾液腺cDNA文库的EST中筛选了1个含polyA尾的基因序列,经5LRACE方法得到该基因全长序列.经同源性比较,该基因预测的氨基酸序列与长角血蜱肌钙蛋白I(GI:14041807)的同源性为84.47%,肌动蛋白结合位点位于147-167氨基酸处,且与长角血蜱肌钙蛋白I肌动蛋白结合位点完全相同,表明该基因是镰形扇头蜱肌钙蛋白I基因.以镰形扇头蜱基因组DNA为模板扩增到编码肌钙蛋白I的基因组序列.序列分析表明该序列不含内含子.RT-PCR分析表明该基因在镰形扇头蜱的卵及其幼蜱、若蜱、成蜱的壳、唾液腺和肠均有表达.
译  名:
Molecular cloning of troponin I gene from the hard tick Rhipicephalus haemaphysaloides and its distribution in it
作  者:
马腾(1);;周勇志(1);;向飞宇(1);;沈杰(1);;周金林(1)
单  位:
(1)中国农业科学院上海兽医研究所, 农业部动物寄生虫学重点开放实验室, 上海, 200232
摘  要:
An expressed sequence tag(EST) with poly A was selected from the salivary gland cDNA library of the female half-feeding blood Rhipicephalus haemaphysaloides,and the complete sequence was cloned by 5′ rapid amplification of cDNA ends(5′-RACE) protocol.The predicted amino acid sequence of the gene showed a rather high homology(84.47%) with Haemaphysalis longicornis troponin Ⅰ protein(GenBank,GI:14041807).The actin-binding domains of troponin Ⅰ in predicted amino acid sequence appeared to be at the amino acid residues 147~167,which might be the same as H.longicornis.The results suggested that the gene of R.haemaphysaloides should be troponin Ⅰ gene.The genome DNA sequence of the troponin Ⅰ gene was amplified by PCR protocol and sequenced.The sequence analysis result indicated that there was no intron in troponin Ⅰ gene of R.haemaphysaloides.RT-PCR analysis revealed that the troponin Ⅰ gene was expressed in its eggs and the shell,salivary gland and gut of the larva,nymphae,adult,respectively.

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