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转录因子MyoD家族的分子进化

Molecular evolution of the MyoD family of transcription factors.

作者信息

Atchley W R, Fitch W M, Bronner-Fraser M

机构信息

Department of Genetics, North Carolina State University, Raleigh 27695-7614.

出版信息

Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11522-6. doi: 10.1073/pnas.91.24.11522.

Abstract

Myogenesis in skeletal muscle is a cascade of developmental events whose initiation involves the MyoD family of transcription factors. Evolutionary analyses of amino acid sequences of this family of transcriptional activators suggest that the vertebrate genes MyoD1, myf-5, Myog (myogenin), and myf-6 were derived by gene duplications from a single ancestral gene. A common genetic origin predicts some functional redundancy between MyoD1 and myf-5 and between Myog and myf-6. Experimental studies have suggested that these pairs of genes can substitute for each other during myogenesis. Separate analyses of the conserved basic helix-loop-helix and nonconserved flanking elements yield similar branching sequences but show evolutionary change in the basic helix-loop-helix region has occurred at a much slower rate.

摘要

骨骼肌中的肌生成是一系列发育事件,其起始涉及转录因子的MyoD家族。对该转录激活因子家族氨基酸序列的进化分析表明,脊椎动物基因MyoD1、myf-5、Myog(肌细胞生成素)和myf-6是通过基因复制从单个祖先基因衍生而来的。共同的遗传起源预示着MyoD1和myf-5之间以及Myog和myf-6之间存在一些功能冗余。实验研究表明,这几对基因在肌生成过程中可以相互替代。对保守的碱性螺旋-环-螺旋和非保守侧翼元件的单独分析产生了相似的分支序列,但表明碱性螺旋-环-螺旋区域的进化变化发生的速度要慢得多。

相似文献

1
Molecular evolution of the MyoD family of transcription factors.转录因子MyoD家族的分子进化
Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11522-6. doi: 10.1073/pnas.91.24.11522.

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