中国畜牧兽医

• 生理生化 • 上一篇    下一篇

牛乳蛋白合成的分子调控机制

林忠荔12,江明锋12,任洪辉12   

  1. 1.西南民族大学青藏高原研究院,四川成都  6100412.动物遗传育种学国家民委—教育部重点实验室,四川成都  610041

  • 收稿日期:2013-11-12 出版日期:2014-05-20 发布日期:2014-06-25
  • 通讯作者: 江明锋(1971—),男,四川人,教授,博士,主要从事高原生物生理基因组学及优质基因的开发利用研究。E-mail:mingfengjiang@vip.sina.com
  • 作者简介:林忠荔(1989—),女,四川人,硕士生,研究方向:遗传学。
  • 基金资助:

    自然科学基金(31172198);教育部科学技术研究重点项目(210264);2011年度留学人员科技活动项目择优资助项目;西南民族大学研究生“创新型科研项目”(CX2014SZ119)。

Molecular Regulation Mechanism of Synthesis of Lactoprotein on Dairy Cattle

LIN Zhong-li1,2,JIANG Ming-feng1,2,REN Hong-hui1,2   

  1.  (1.College of Tibet Plateau, Southwest University for Nationalities, Chengdu 610041,China2.Key Laboratory of Animal & Breeding, State Ethnic Affairs Commission and Minist of Education, Chengdu 610041, China)

  • Received:2013-11-12 Online:2014-05-20 Published:2014-06-25

摘要: 乳蛋白是乳汁的主要成分之一,具有极高的营养价值,含有人体所需的必需氨基酸。作者主要介绍了乳蛋白合成的相关通路:氨基酸转运系统(amino acid transport system)、蛋白酪氨酸激酶-2信号转导子和转录激活子-5(Janus tyrosine kinase 2-signal transducer and activator of transcription 5, Jak2-Stat5)信号转导途径和雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)信号通路的调控。氨基酸转运系统为乳蛋白形成提供前体原料,信号转导子和转录激活因子(signal transducer and activator of transcription,Stat)家族是调控乳蛋白表达的信号传导因子,特别是Stat5对于乳蛋白的合成有重要作用,而mTOR信号通路整合了催乳素、胰岛素等激素及EIF4E、AKT等细胞因子来调控蛋白相关基因的表达,此外还涉及乳蛋白合成,对于提高乳汁营养价值具有重要意义。

关键词: 氨基酸; 信号转导子和转录激活因子(Stat)家族; 雷帕霉素靶蛋白(mTOR); 胰岛素; 乳蛋白

Abstract: Lactoproteins are main components of the milk which include almost all of the essential amino acids and has very high nutritive value. The synthesis of lactoproteins are regulated by amino acid transporters,Janus tyrosine kinase 2 signal transducer and activator of transcription 5 (Jak2-Stat5) and mammalian target of rapamycin (mTOR) pathway. Amino acid transporters provide materials for the synthesis of milk protein. The Stat family are signal transducer factors to regulate the expression of lactoprotein, especially Stat5. The mTOR pathway can integrate hormone such as prolactin and insulin cytokine such as EIF4E and AKT, to regulate the synthesis of milk protein. It can be deduced the study of mechanism of milk protein synthesis is very important to improve the nutritive value of milk.

Key words:

amino acid; Stat family; mTOR; insulin; lactoprotein