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在人类和猿人Y染色体中,在平行体臂之间大量的基因转换
Steve Rozen1, Helen Skaletsky, Janet D Marszalek
1Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, Massachusetts 02142, USA.
Nature
|June 20, 2003
概括
人类Y染色体包含了人类-黑猩猩分歧之前的平行体. 这些在Y染色体 (MSY) 的男性特异性区域上的Palindromic区域通过基因转换进化,影响丸基因家族进化.
科学领域:
- 遗传学 遗传学 是一个
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- Y染色体的男性特异性区域 (MSY) 包含八个平行体,占其 euchromatic DNA 的很大一部分.
- 这些神经体携带丸特异性基因,并在其手臂之间表现出高序列一致性 (99.97%),这表明最近的重复事件.
- 之前的解释表明,这些体是大约10万年前形成的.
研究的目的:
- 通过对大猿的比较测序来研究MSY体的进化年龄.
- 为了确定MSY平行体是否早于人类和黑猩猩的分歧.
- 了解基因转换在MSY帕林德罗姆和相关基因家族的进化中的作用.
主要方法:
- 在人类和大猿血统中对MSY平行体的比较测序.
- 在当代人类群体中,对MSY palindromes中的序列变异进行分析.
- 遗传学分析,以确定MSY神体的进化历史.
主要成果:
- 在8个MSY神经元中,至少有6个早于人类和黑猩猩血统的分歧 (大约500万年前).
- 在人类血统中,MSY palindromes中出现了反复的臂对臂基因转换的证据.
- 显著的核酸转化 (大约. 在最近的进化过程中,通过Y-Y基因转化,通过Y-Y基因转化,通过Y-Y基因转化,在最近的进化过程中,通过Y-Y基因转化,通过Y-Y基因转化,在最近的进化过程中,通过Y-Y基因转化,通过Y-Y基因转化,通过Y-Y基因转化,通过Y-Y基因转化,通过Y-Y基因转化.
结论:
- MSY神体是古老的结构,早于人类和黑猩猩的物种化.
- 基因转换是一个关键的机制,驱动着MSY神体臂的协同进化.
- 经常性Y-Y基因转换在人类Y染色体上的多副本丸基因家族的进化中起着重要作用.
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