畜牧兽医学报 ›› 2008, Vol. 39 ›› Issue (11): 1606-1611.doi:

• 研究简报 • 上一篇    下一篇

鹅肌肉生长抑制素基因5′-调控区序列特征和组织表达分析

顾志良1,卢祥云1,朱大海2,李辉3   

  1. 1. 常熟理工学院生物系,常熟 215500;2. 协和医科大学基础医学院,北京 100005;3. 东北农业大学动物科技学院,哈尔滨 150030
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-11-24 发布日期:2008-11-24

Characterization of 5′-Regulatory Region and Expressional Distribution of Myostatin Gene in Goose

GU Zhi-liang1, LU Xiang-yun1, ZHU Da-hai2, LI Hui3   

  1. 1. Department of Biology, Changshu Institute of Technology, Changshu 215500, China; 2. School of Basic Medicine, Peking Union Medical College, Beijing 100005, China; 3. College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-11-24 Published:2008-11-24

摘要: 根据鸡的Myostatin基因序列设计引物,从鹅的基因组DNA中扩增到了Myostatin基因的5′-调控区,克隆并测序后获得了1.3 kb片段序列。与其他物种的序列比较发现,鹅Myostatin基因的该调控序列与鸭同源性为94.8%,与鸡同源性为69.2%,而与小鼠仅为14.3%。通过生物信息学方法,分析确定了其启动子和转录起始位点,发现在转录起始位点上游-34 bp处存在1个TATA盒,-77 bp处存在1个CAAT盒。还发现在该片段中包含5个E框、2个MEF2结合位点、1个MSX2盒和1个MTATA盒等肌肉特异性转录因子结合位点。采集鹅肝脏、胸肌、腿肌、心脏、肺、肠、肾和脑等8种组织并提取总RNA,用Northern blot 方法检测了Myostatin基因mRNA在8种组织中的表达情况,发现其只在胸肌和腿肌中表达,而在其他几种组织中没有检测到表达信号。

Abstract: The primers of 5′-regulatory region were designed according to chicken Myostatin gene. The fragment was amplified from goose genomic DNA, and cloned into pGEMT-Easy Vector and sequenced. A 1.3 kb long fragment of 5′regulatory region of goose Myostatin gene, which includes the putative initial transcriptional site, was acquired. The sequence homology analyses showed that the goose Myostatin 5′-regulatory region shared 94.8% with duck, 692% with chicken and 14.3% with mouse. Sequence analyses showed that there are a TATA box at -34 bp and a CCAAT box at -77 bp upstream of the putative transcriptional site. In addition, some muscle specific transcriptional factor binding sites including 5 E-boxes, 2 MEF2 binding sites, a MSX2 box and a muscle TATA box were determined. The Northern blot results in goose showed that Myostatin mRNA only expressed in breast muscle and thigh muscle and were not detectable in liver, heart, intestine, kidney, brain and lung.