Cloning and Sequence Analysis of IGFBP-1 Gene in Sheep  

作　　者：Mingliang ZHOU Pinggui YANG Dengjun WU Xiangyu ZHANG 

机构地区：[1]Sichuan Academy of Grassland Science [2]College of Animal Sci-Technology,Sichuan Agricultural University [3]Sichuan Academy of Animal Science

出　　处：《Agricultural Biotechnology》2015年第5期49-53,共5页农业生物技术（英文版）

基　　金：Supported by Special Fund for Agro-scientific Research in the Public Interest from the Ministry of Agriculture(201003061);Key Project of Livestock and Poultry Breeding of Sichuan Province(01NG029-18)

摘　　要：In this study, using Liangshan semi-fine wool sheep as an experimental material, full-length CDS sequence of IGFBP-1 gene was cloned with RT-PCR method and analyzed with bioinformatics methods. The results showed that the full-length CDS sequence of IGFBP-1 gene in Liangshan semi-fine wool sheep was 792 bp in length, encoding 263 amino acids. The CDS sequence shared 97%, 76% and 74% homology with bovine, human and rat, respectively; the amino acid sequence shared 97% , 69% and 71%, respectively. The GenBank accession number was FJ589639.1. The amino acid molecular weight of IGFBP-1 was 27.8 kD, and the theoretical isoelectric point （pl） was 5.99. The result of phylogenetic analysis showed that IGFBP-1 gene in Liangshan semi-fine wool sheep exhibited close phylogenetic relationships with bovine, goat and other mammals, and distant phylogenetic relationships with chicken and fish. IGFBP-1 gene had obvious hy- drophobic and hydrophilic regions, harboring one signal peptide, one transmembrane region, 16 phosphorylation sites, six N-glycesylation sites and eight O-glycosy- lation sites. The result of secondary structure analysis showed that the random coil, a-helix and 13-sheet regions accounted for 61.98%, 24.33% and 13.69%, re- spectively. The result of tertiary structure analysis showed that IGFBP-1 harbors an IGFBP_N domain and a thyrnglobulin type-1 domain. This study laid a solid foundation for further investigating the function of IGFBP-1 gene in sheep.In this study, using Liangshan semi-fine wool sheep as an experimental material, full-length CDS sequence of IGFBP-1 gene was cloned with RT-PCR method and analyzed with bioinformatics methods. The results showed that the full-length CDS sequence of IGFBP-1 gene in Liangshan semi-fine wool sheep was 792 bp in length, encoding 263 amino acids. The CDS sequence shared 97%, 76% and 74% homology with bovine, human and rat, respectively; the amino acid sequence shared 97% , 69% and 71%, respectively. The GenBank accession number was FJ589639.1. The amino acid molecular weight of IGFBP-1 was 27.8 kD, and the theoretical isoelectric point （pl） was 5.99. The result of phylogenetic analysis showed that IGFBP-1 gene in Liangshan semi-fine wool sheep exhibited close phylogenetic relationships with bovine, goat and other mammals, and distant phylogenetic relationships with chicken and fish. IGFBP-1 gene had obvious hy- drophobic and hydrophilic regions, harboring one signal peptide, one transmembrane region, 16 phosphorylation sites, six N-glycesylation sites and eight O-glycosy- lation sites. The result of secondary structure analysis showed that the random coil, a-helix and 13-sheet regions accounted for 61.98%, 24.33% and 13.69%, re- spectively. The result of tertiary structure analysis showed that IGFBP-1 harbors an IGFBP_N domain and a thyrnglobulin type-1 domain. This study laid a solid foundation for further investigating the function of IGFBP-1 gene in sheep.

关 键 词：Insulin-like growth factor-binding protein-1 gene （IGFBP-1 gene） CLONE SHEEP 

分 类 号：S826[农业科学—畜牧学]