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哺乳动物DNA甲基化研究进展 被引量:2

Research Progress on the Methylation in Mammals
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摘要 在真核生物基因组中DNA甲基化是一种重要的修饰方式,也是一种重要的表观遗传学机制。通常甲基化发生在胞嘧啶第5个碳原子上,由DNA甲基化转移酶(DNMTs)家族催化形成的。DNA甲基化是一种可逆的过程,并且直接影响到基因的活性。DNA甲基化对于哺乳动物的正常发育起着非常重要的作用,并在很大程度上影响着哺乳动物重要的生物学进程,主要包括转录成分的沉默、基因失活、染色体的完整性和大部分基因的转录调控作用。 DNA methylation is the common base modification in the eukaryotic genome and is an important epigenetic mechanism.Methylation at the five-carbon of cytosine is a reversible process that can directly influence gene activity and the reaction is catalyzed by a family of DNA methyltransferases(DNMTs).DNA methylation is essential for normal mammals development and plays an important role in the affects a wide range of essential biological processes,and it includes silencing of transposable elements,inactivation of genes,maintenance of chromosomal integrity,X chromosome inactivation,and transcriptional regulation of a large number of genes and so on.
作者 杨春 邢秀梅
出处 《中国畜牧兽医》 CAS 北大核心 2012年第8期145-148,共4页 China Animal Husbandry & Veterinary Medicine
基金 国家科技基础条件平台中心(家养动物种质资源平台)项目
关键词 DNA甲基化 DNA甲基化转移酶 表观遗传 沉默 DNA methylation DNA methyltransferases epigenetic silencing
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