›› 2010, Vol. 37 ›› Issue (12): 92-95.

• 遗传繁育 • 上一篇    下一篇

山羊金属硫蛋白-Ⅲ基因克隆及序列分析

王磊1,2,杨联1,吴建平1,汪晓娟1   

  1. (1.甘肃农业大学动物科学技术学院,兰州 730070;2.甘肃省张掖市畜牧管理站,张掖 734000)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-12-20 发布日期:2010-12-20
  • 通讯作者: 杨联

Cloning and Sequence Analysis of Metallothionein-Ⅲ in Goat

WANG lei1,2,YANG Lian1,WU Jian-ping1,WANG Xiao-juan1   

  1. (1.College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;2.Animal Husbandry Management Station in Zhangye City,Zhangye 734000,China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-12-20 Published:2010-12-20
  • Contact: YANG Lian

摘要: 通过设计特异性引物MT-ⅢSP1和MT-ⅢSP2,采用RT-PCR方法从山羊脑组织中克隆出金属硫蛋白-Ⅲ(MT-Ⅲ)基因编码区全序列,片段长度均为207 bp,提交GenBank,登录号为:EF471976。山羊MT-Ⅲ基因编码68个氨基酸,含19个半胱氨酸,不含芳香族氨基酸和组氨酸。BLAST比对结果表明,山羊与牛、绵羊、狗、猪、人、黑猩猩和鼠的氨基酸同源性分别为99.5%、98.6%、89.4%、88.5%、88.2%、88.2%和83.8%,说明MT-Ⅲ在物种间高度同源,进化上高度保守,含有MT-Ⅲ特有的MDPET、C-X-C、C-C-X-C-C、C-X-X-C、KKS(X为非Cys外的其它氨基酸)等保守的短肽结构。系统进化树结果表明,由核苷酸序列与氨基酸序列建立的系统进化树结果一致,并与比较形态学和比较生理学分类结果一致。

关键词: 山羊; 金属硫蛋白-Ⅲ; cDNA; 序列分析

Abstract: In this study, a pair of special primers(MT-ⅢSP1 and MT-ⅢSP2) were designed for cloning the coding sequence of metallothionien-Ⅲ(MT-Ⅲ) from brain tissue in goat. The MT-Ⅲ coding sequence in goat were 207 bp. The goats MT-Ⅲ gene sequences had been submitted to GenBank under accession numbers EF471976.Goat MT-Ⅲ gene coded 68 amino acids, including 19 Cys residues. Goat MT-Ⅲ had characteristic MDPET,C-X-C,C-C-X-C-C,C-X-X-C and KKS sequences of MTs, where X was non-cysteine amino acids. The amino acids sequences of goat shared 99.5%,98.6%,89.4%,88.5%,88.2%,88.2% and 83.8% sequence similarity with cattle, sheep, dog, pig, human, rhesus monkey and mouse, it showed that the MT-Ⅲ was very conservative.The phylogeny of MT-Ⅲ from nucleotide and amino acids sequence were same, and was also consistent with the result of morphology and physiology.

Key words: goat; metallothionien-Ⅲ; cDNA; sequence analysis

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