Co-evolution of X-chromosome inactivation and imprinting in mammals

被引:196
作者
Reik, W [1 ]
Lewis, A [1 ]
机构
[1] Babraham Inst, Lab Dev Genet & Imprinting, Cambridge CB2 4AT, England
基金
英国医学研究理事会; 英国生物技术与生命科学研究理事会;
关键词
D O I
10.1038/nrg1602
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Recent studies have revealed mechanistic parallels between imprinted X-chromosome inactivation and autosomal imprinting. We suggest that neither mechanism was present in ancestral egg-laying mammals, and that both arose when the evolution of the placenta exerted selective pressure to imprint growth-related genes. We also propose that non-coding RNAs and histone modifications were adopted for the imprinting of growth suppressors on the X chromosome and on autosomes. This provides a unified hypothesis for the evolution of X-chromosome inactivation and imprinting.
引用
收藏
页码:403 / 410
页数:9
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