生物技术通报 ›› 2015, Vol. 31 ›› Issue (12): 150-157.doi: 10.13560/j.cnki.biotech.bull.1985.2015.12.022

• 研究报告 • 上一篇    下一篇

荷包猪SLA-DRB基因cDNA的克隆及分子进化特征分析

姜平1,2,额尔敦木图1,高凤山1,2   

  1. 1.内蒙古农业大学兽医学院,呼和浩特 010018;
    2.大连大学生命科学与技术学院,大连 116622
  • 收稿日期:2015-04-04 出版日期:2015-12-19 发布日期:2015-12-19
  • 作者简介:姜平,女,硕士,研究方向:动物解剖学与免疫学;E-mail:1224763183 @qq.com
  • 基金资助:

    国家自然科学基金项目(31172304),辽宁省博士启动基金项目(20081078)

The Cloning of cDNA of SLA-DRB from Hebao Pigs and the Analysis of Their Molecular Evolutionary Characteristics

Jiang Ping1,2, Erdemtu1, Gao Fengshan1,2   

  1. 1. College of Veterinary Medicine,Inner Mongolia Agricultural University,Hohhot 010018;
    2. College of Life Science and Technology,Dalian University,Dalian 116622
  • Received:2015-04-04 Published:2015-12-19 Online:2015-12-19

摘要:

旨在研究荷包猪SLA-DRB基因的分子特征,设计引物用RT-PCR扩增3头荷包猪DRB基因cDNA,并克隆至pMD18-T Vector,阳性克隆测序并做序列分析,分别进行同源性、分子进化及主要氨基酸变异位点分析。结果表明,成功从3头荷包猪中扩增得到SLA-DRB基因,分别命名为SLA-DRB-HB01-03,经序列测定后,证实cDNA全长为836 bp,其中1-801为ORF区,共编码266个氨基酸。同源性分析显示,SLA-DRB-HB与其他SLA-DRB等位基因的同源性介于90.3%-99.8%之间。分子进化分析表明,荷包猪SLA-DRB-HB独立分支,与其他等位基因相比较,进化更加原始。氨基酸变异位点和多态性分析结果显示,SLA-DRB-HB本身存在一定的多态性。

关键词: 荷包猪, SLA-DRB, 分子进化, 多态性

Abstract:

In order to study the molecular characteristics of SLA-DRB derived from Hebao pigs, a pair of primers were designed to amplify the cDNA of SLA-DRB from 3 Hebao pigs. Then the amplified cDNA were cloned into pMD18-T vector and the positive clones were sequenced and analyzed by homology comparing, molecular evolution analysis, and comparing and analyzing the key amino acid sites. It was shown that the SLA-DRB alleles were amplified successfully from the tissues of the 3 Hebao pigs, and the alleles were designated as SLA-DRB-HB01, 02, and 03. After sequencing, the results showed that the cDNA of SLA-DRB-HB alleles was 836 bp, and the open reading fragments(ORF)of SLA-DRB-HB locating at sites of 1-801, encoding 266 amino acids. By homology analyzing, the SLA-DRB-HB genes had a homology value of 90.3%-99.8% with other SLA-DRB alleles. The analysis of molecular evolution showed that the SLA-DRB-HB alleles were clustered an independent branch of phylogenetic tree, and SLA-DRB-HB evolved more primarily in contrast to other SLA-DRB alleles. The analysis of the mutated amino acids sites and the polymorphism of SLA-DRB-HB demonstrated that they had polymorphism.

Key words: Hebao pig, SLA-DRB, molecular evolution, polymorphism