《中国畜牧兽医》 ›› 2019, Vol. 46 ›› Issue (4): 1108-1115.doi: 10.16431/j.cnki.1671-7236.2019.04.018

• 遗传繁育 • 上一篇    下一篇

蛋氨酸对动物表型性状的影响及DNA甲基化调控机制的研究进展

徐友信1, 李宗珍1, 王杰2, 张乃锋2   

  1. 1. 潍坊科技学院, 寿光 262700;
    2. 中国农业科学院饲料研究所, 农业部饲料生物技术重点开放实验室, 北京 100081
  • 收稿日期:2018-10-10 出版日期:2019-04-20 发布日期:2019-04-22
  • 通讯作者: 张乃锋 E-mail:zhangnaifeng@caas.cn
  • 作者简介:徐友信(1981-),男,山东潍坊人,硕士,研究方向:生态学,E-mail:125656489@qq.com
  • 基金资助:

    国家重点研发计划项目(2017YFD0502001);国家肉羊产业技术体系建设专项(CARS-39)

Research Progress on Effects of Methionine on Phenotypic Traits and Regulation Mechanism of DNA Methylation in Animals

XU Youxin1, LI Zongzhen1, WANG Jie2, ZHANG Naifeng2   

  1. 1. Weifang University of Science and Technology, Shouguang 262700, China;
    2. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2018-10-10 Online:2019-04-20 Published:2019-04-22

摘要:

蛋氨酸(methionine,Met)是动物生长代谢过程中重要的甲基供体,同时作为必需氨基酸中唯一的含硫氨基酸,与赖氨酸一起为玉米-豆粕型日粮或微生物蛋白合成的第一或第二限制性氨基酸。另外,Met作为饲料添加剂对动物机体的生产性能、自身免疫力及疾病预防具有重要作用。随着营养表观遗传学在动物领域研究的不断发展,可实现以Met作为重要的营养素对动物进行表观遗传修饰(DNA甲基化、组蛋白修饰、染色质重塑及非编码RNA等)。DNA甲基化作为表观遗传修饰的方式之一,对于研究表型性状具有重要作用,是联系基因和表型间的纽带。文章介绍了DNA甲基化的作用机制及蛋氨酸代谢的调控机制,为今后正确理解Met与表观遗传学修饰之间的联系,进一步揭示表型性状的分子作用机制提供参考。通过基因组学进一步对Met如何在分子水平影响动物表型性状的改变进行展望与分析,也有助于掌握Met需要的个体差异,确定个体的营养需要量,实现真正的"基因饲养"模式。

关键词: 蛋氨酸(Met); 表观遗传; DNA甲基化; 表型性状

Abstract:

Methionine (Met) is an important methyl donor in the growth and metabolic process of animal.At the same time,as the only sulfur-containing amino acid in the essential amino acid,it is the first or second restrictive amino acid with lysine to synthesize corn-soybean meal feed or microbial protein.In addition,Met serving as a feed additive plays an important role in animal production performance,autoimmunity and disease prevention.With the development of epigenetics in the field of animal studies,as an important nutrient,Met can be used to carry out epigenetic modifications (DNA methylation,histone modification,chromatin remodelling and non-coding RNA,etc.).DNA methylation is one of the ways of epigenetics,and it has an important role in the study of phenotypic traits,making it a connection between genes and phenotypes.This paper introduces the mechanism of DNA methylation and the regulation of methionine metabolism,which will provide references for understanding the relationship between the Met and epigenetic modification and further revealing the molecular mechanism of phenotypic traits.In addition,through genomics,further prospect and analysis of how Met affects the changes of animal phenotypic traits at the molecular level can also help grasp the individual differences in animal Met demands,determine the individual nutritional requirements,and realize the real "gene breeding" model.

Key words: methionine (Met); epigenetics; DNA methylation; phenotypic traits

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