鲈鱼酰基辅酶A结合蛋白Acbp基因cDNA的克隆和诱导表达

酰基辅酶A结合蛋白(acyl-CoA-binding protein,ACBP)对长链脂酰基辅酶A(long-chainfatty acyl-CoA esters,LCACoA)有很高的亲和力,因而对LCACoA在细胞内的运输和利用过程起重要的作用。本文采用RACE技术从鲈鱼肝脏中克隆了Acbp基因的全长cDNA序列,该基因全长cDNA 679 bp,5'端和3'端的非翻译区分别为83 bp和326 bp,开放阅读框为270 bp。推测编码89个氨基酸,理论等电点为5.44,分子量为10.14 kDa。鲈鱼Acbp与青鳉鱼、银鳕鱼、大西洋鲑和人的同源性分别为87%、84%、78%和68%。用RT-PCR和实时定量PCR检测鲈鱼肌肉、心脏、眼、大脑、消化道、肾脏、脂肪组织、脾脏、鳃和肝脏等10种组织的Acbp基因的表达情况,结果表明,在肾脏和肝脏的表达量高,肌肉、眼睛和大脑中表达低。定量PCR检测表明鲈鱼肝脏Acbp的表达在饥饿时明显下降,胰岛素上调其表达,葡萄糖对其表达则没有影响。

Cloning and Induced Expression of Acyl-CoA Binding Protein Gene from Sea Perch Lateolabrax japonicus

Acyl-CoA-binding protein(ACBP) has been proposed to play a pivotal role in the intracellular trafficking and the utilization of long-chain fatty acyl-CoA esters.Full-length cDNA coding for Lateolabraxjaponicus ACBP was isolated from liver total RNA by RACE techniques.It was shown to be 679 bp,which included a 83 bp of 5'-untranslated region(UTR),a 326 bp 3'-UTR and a 270 bp open reading frame(ORF).The deduced ACBP was comprised of 89 amino acids with a theoretical isoelectric point of 5.44 and molecular wei...