当前位置: 首页 > 文章 > 柳蚕丝素重链基因(Fib-H)cDNA 5′端片段的克隆与表达分析 蚕业科学 2010,36 (1) 74-78
Position: Home > Articles > Cloning and Expressional Analysis of 5′-end cDNA Fragment of Fibroin Heavy Chain Gene (Fib-H) from Actias selene Hübner Science of Sericulture 2010,36 (1) 74-78

柳蚕丝素重链基因(Fib-H)cDNA 5′端片段的克隆与表达分析

作  者:
曹甲;刘朝良;朱保建;魏国清;王在贵;钱岑
单  位:
安徽农业大学生命科学学院
关键词:
柳蚕;丝素重链基因;序列;表达
摘  要:
柳蚕(Actias selene Hübner)是鳞翅目大蚕蛾科的一种珍稀野生绢丝昆虫。利用RT-PCR方法克隆了柳蚕丝素重链基因(Fib-H)cDNA 5′端的一个片段,该片段序列长819 bp,编码273个氨基酸,含有4个保守多聚丙氨酸结构域。序列比对分析表明,该片段序列与樟蚕(Saturnia japonica)、天蚕(Antheraea yamamai)、柞蚕(Antheraea pernyi)、印度柞蚕(Antheraea mylit-ta)和家蚕(Bombyxmori)的Fib-H基因cDNA 5′端同源序列的相似性分别为72.5%、65.8%、65.1%、65.1%、47.1%。半定量PCR分析显示柳蚕Fib-H基因cDNA 5′端片段序列在5龄幼虫第1-12天的表达量呈现逐渐上升的趋势。
译  名:
Cloning and Expressional Analysis of 5′-end cDNA Fragment of Fibroin Heavy Chain Gene (Fib-H) from Actias selene Hübner
作  者:
CAO Jia LIU Chao-Liang ZHU Bao-Jian WEI Guo-Qing WANG Zai-Gui QIAN Cen (College of Life Science,Anhui Agriculture University,Hefei 230036,China)
关键词:
Actias selene Hübner;Fibroin heavy chain gene;Sequence;Expression
摘  要:
Actias selene Hübner is a rare wild silk spinning insect that belongs to Lepidoptera's saturniidae.The partial cDNA sequence of fibroin heavy chain gene(Fib-H) in Actias selene Hübner was obtained through RT-PCR.The cloned sequence was 819 bp long and encoded 273 amino acids with 4 polyalanine conserved domains.Sequence alignment revealed that 5′cDNA fragment of Fib-H from Actias selene Hübner had 72.5%,65.8%,65.1%,65.1% and 47.1% sequence identities with that of Saturnia japonica,Antheraea yamamai,Antheraea pernyi,Antheraea mylitta and Bombyx mori,respectively.Semi-quantitative PCR analysis showed that the expression of 5′ cDNA fragment of Fib-H gene in Actias selene Hübner larvae increased gradually from the 1st day to the 12th day of the 5th instar.

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