天祝白牦牛APEX-1基因的克隆及生物信息学分析  

Cloning and Bioinformatics Analysis of APEX-1 Gene in Tianzhu White Yak

作　　者：李亚兰[1] 张全伟[1] 王雪莹[1] 马友记[2] 张勇[1] 赵兴绪[1] 

机构地区：[1]甘肃农业大学动物医学院,甘肃兰州730070 [2]甘肃农业大学动物科技学院,甘肃兰州730070

出　　处：《华北农学报》2014年第2期51-55,共5页Acta Agriculturae Boreali-Sinica

基　　金："十二五"农村领域国家科技计划项目(2013AA02505-3)

摘　　要：克隆天祝白牦牛脱嘌呤嘧啶核酸内切酶基因(APEX-1)全长cDNA序列,为研究天祝牦牛高原抗逆性机制提供理论基础。根据已知哺乳动物APEX-1基因cDNA序列同源性,设计引物以及5'和3'特异性引物,运用cDNA末端快速扩增(RACE)技术获得天祝白牦牛APEX-1基因全长cDNA序列。扩增获得天祝白牦牛APEX-1基因全长cDNA序列为1 391 bp(GenBank登录号:KF611690),ORF长957 bp,编码318个氨基酸。氨基酸序列分析显示天祝白牦牛APEX-1基因编码氨基酸序列与大多数哺乳动物相似,但有7个氨基酸突变。同源建模预测,显示天祝白牦牛APEX-1蛋白由8个α-螺旋和11个β-折叠片形成一个呈三明治的α/β球蛋白。天祝白牦牛APEX-1基因的成功克隆为进一步研究该基因的功能奠定了基础。To clone Tianzhu White Yak apurinic /apyrimidinic endonuclease-1（ APEX-1） full length cDNA, thus provide a theoretical basis to study its mechanisms in stress resistance. Primers of the APEX-1 gene and its RACE primers were designed according to the alignment of known cDNA sequences of mammals,to obtain the full length cDNA of APEX-1 by PCR and RACE technique. The result showed that the full length of APEX-1 cDNA was 1 391 bp（ GenBank accession No. KF611690）,with an ORF 957 bp in length,which encoded 318 amino acids. The amino sequence analysis indicated that APEX-1 gene is highly homologous in most mammals. However,there are seven differences in amino sequence compared with other mammals. Homogenous 3D model of APEX-1 obtained by predict shows that APEX-1 protein is globular α / β rich protein,containing 11 β-sheets at the core which is surrounded by 8 helical structure. The full length cDNA of 1 391 bp APEX-1 gene was successfully cloned,which laid a basis for further studying of its roles in White Yak stress resistance.

关 键 词：天祝白牦牛 脱嘌呤嘧啶核酸内切酶 CDNA末端快速扩增 序列分析 

分 类 号：Q78[生物学—分子生物学]