首页> 中文期刊> 《农业生物技术学报》 >奶牛SREBP1蛋白对FASN基因启动子的转录调控分析

奶牛SREBP1蛋白对FASN基因启动子的转录调控分析

         

摘要

Fatty acids synthase (FASN) is a key enzyme for the synthesis of fatty acids in animal tissues.In order to study the regulation mechanism of FASN gene in dairy cows (Bos taurus),three different length fragment of FASN promoter was cloned from the genomic DNA by PCR and the transcription factor binding sites were predicted using bioinformatics software.After transfected with sterol regulatory element binding protein1 (SREBP1) eukaryotic expression vector and FASN promoter vectors in L02 hepatocytes cell line from human (Homo sapiens),expression of nuclear SREBP1 protein was investigated using western blotting.The promoter activity and mRNA expression of FASN gene were investigated using double luciferase system and qRT-PCR.The results indicated that the pGL3-FSAN1,pGL3-FASN2 and pGL3-FASN3 promoter fragments were 177,255 and 399 bp,respectively.Bioinformatics analysis of sequence revealed that the 399 bp of FASN promoter sequence contains several binding site for transcription factors,including specificity proteinl(SP1),CCAAT-enhancer-binding protein(C/EBP),and nuclear factor Y (NF-Y).The sequence of pGL3-FASN2 and pGL3-FASN3 promoter contains the SREBP1 transcription factor binding site.Expression of nuclear SREBP1 protein was promoted by transfected with pcDNA3.1-SREBP1 vector.After transfected with pGL3-FSAN1,pGL3-FASN2 and pGL3-FASN3 vector,and co-transfected with pcDNA3.1 and pcDNA3.1-SREBP1,the activity of pGL3-FASN1 promoter was not affect by the pcDNA3.1 treatment.Compared with pGL3-FASN1 promoter activity,the activity of pGL3-FASN2 and pGL3-FASN3 promoters increased significantly by the pcDNA3.1-SREBP1 treatment (P<0.01).Compared with control group,FASN mRNA expression was significantly increased by 1.67-fold (P<0.05) after transfected with SREBP1 vector.The present study reveals that expression of FASN gene is regulated via nuclear SREBP1 protein and provide basic information for the transcriptional regulation of FASN gene in dairy cows.%脂肪酸合成酶(fatty acid synthase,FASN)是动物组织合成脂肪酸的关键酶,为研究奶牛(Bos taurus)FASN基因的调控机制,本研究从奶牛基因组DNA中克隆构建了3个不同片段长度的FASN基因启动子并分析其结构,在L02肝脏细胞中转染固醇调节元件结合蛋白l(sterol regulatory element binding protein1,SREBP1)真核表达载体和FASN启动子,Western blot检测SREBP1核蛋白的表达,双荧光素酶系统和qRT-PCR技术研究对FASN基因启动子活性的调控作用,结果发现,构建的pGL3-FSAN1、pGL3-FASN2和pGL3-FASN3启动子片段长度分别为177、255和399 bp,其中pGL3-FASN2和pGL3-FASN3包含SREBP1转录因子结合位点.在人(Homo sapiens)源L02肝脏细胞中转染SREBP1质粒后检测发现,SREBP1核蛋白表达升高.肝脏细胞中转染pGL3-FSAN1、pGL3-FASN2和pGL3-FASN3启动子并用SREBP1质粒处理后,pGL3-FASN2和pGL3-FASN3启动子活性极显著增加(P<0.01).与对照组相比,SREBP1处理后细胞FASN基因mRNA的表达显著增加1.67倍(P<0.05).本研究揭示奶牛SREBP1蛋白可以促进对FASN基因的转录激活.这一结果为研究奶牛FASN基因的转录调控机制提供了基础资料.

著录项

  • 来源
    《农业生物技术学报》 |2018年第4期|652-659|共8页
  • 作者单位

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

    河南农业大学 牧医工程学院/农业部动物生化与营养重点实验室,郑州450002;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 家畜生理学、生物物理学、生物化学;
  • 关键词

    肝脏细胞; 脂肪酸合成酶; 固醇调节元件结合蛋白(1SREBP1);

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号