扩展莫尼茨绦虫引发酶蛋白基因的克隆和cDNA序列分析  

Cloning and Sequence Analysis of the cDNA Encoding Primase in Moniezia expansa

作　　者：吕廷德[1,2] 赵文娟[2] 朱建军[2] 王新华[2] 薄新文[2] 

机构地区：[1]石河子大学,石河子832000 [2]新疆农垦科学院兵团绵羊繁育生物技术重点实验室,石河子832000

出　　处：《中国畜牧兽医》2009年第9期59-62,共4页China Animal Husbandry & Veterinary Medicine

基　　金：国家科技部973前期研究专项(2006CB708512)

摘　　要：分离和鉴定扩展莫尼茨绦虫(Moniezia expansa)新基因,为进一步研究该基因的功能奠定基础。构建扩展莫尼茨绦虫成虫cDNA文库,随机挑取重组阳性克隆进行测序,对部分序列进行引物步移法测序,获取其全长cDNA序列;采用生物信息学等分析技术对该cDNA序列进行开放阅读框(ORF)的寻找、编码氨基酸的推导、核苷酸和氨基酸同源性比较及蛋白质二级结构的初步预测。获得了1个扩展莫尼茨绦虫新基因——引发酶蛋白,全长1269 bp,编码422个氨基酸,属于AE_Prim_S家族。编码蛋白的理论分子质量为47.1598 ku,等电点为4.83。获得了扩展莫尼茨绦虫反应结合蛋白的全长cDNA序列,为该基因功能的试验性鉴定工作奠定基础。To clone and identify novel genes from an adult Moniezia expansa （M. expansa） cDNA library, and provide a foundation for further research, a cDNA library was constructed from M. expansa adult stage. Clones were selected randomly from the cDNA library and were sequenced by using the method of expression sequence tags （ESTs）. Novel genes were acquired by primer-walking. The cDNA sequence encoding M. expansa primase protein was analyzed, including searching the ORF, translating the nucleotide to protein sequence, similarity searches and secondary structure predication with bioinformatics analysis. Primase genes, 1269 bp and coding for 422 amino acids, was cloned and sequenced, then the sequence was submitted to GenBank and got an accession number,GH291475. The theoretical pI was 4.83 and molecular weight was 47. 1598 ku. The full-length cDNA sequence encoding M. expansa primase was obtained, which gave a basis for further functional study of this gene.

关 键 词：扩展莫尼茨绦虫 引发酶 序列分析 表达序列标签 

分 类 号：Q78[生物学—分子生物学]