十代祖先的演化过程
Josephine C Adams1, Richard P Tucker2
1School of Biochemistry, University of Bristol, Bristol, BS8 1TD, UK.
BMC ecology and evolution
|September 14, 2024
概括
状动物中素蛋白的进化涉及基因重复事件,导致明显的素-C,素-R,素-W和素-X对应物. 这些基因是通过整个基因组和局部重复产生的,与脊椎动物进化相吻合.
科学领域:
- 进化生物学是进化的生物学.
- 分子进化是分子进化的过程.
- 基因组学就是基因组学.
背景情况:
- 细胞外矩阵进化与甲基动物的器官生成有关.
- 色素是带状细胞外基质糖蛋白,参与细胞信号传递和形态发生.
- 素基因家族的进化历史,以及其多个脊椎动物的同类基因,仍然不清楚.
研究的目的:
- 为了研究状动物血统中素蛋白的进化起源和多样化.
- 构建一个Tenascin基因家族的进化模型.
主要方法:
- 对半弦动物,脑弦动物,长袍动物,鱼,软骨鱼,叶片鱼,射线鱼和四足动物进行基因组分析.
- 预测素蛋白的鉴定.
- 通过序列保护,分子系谱和基因合成保护来评估进化关系.
主要成果:
- 提出了一种新的进化模型,用于探纳辛在祖先的带动物中的起源.
- 在脊椎动物全基因复制后,出现了类似于Tenascin-C和类似于Tenascin-R的对应物.
- 素-X来自于第二个全基因组复制的全基因组复制,而素-W来自于素-R的局部复制.
结论:
- 脊椎动物中的特纳素对应物多样性是整个基因组和局部重复后选择性基因保留的结果.
- 特定的tenascin对应物的出现与脊椎动物特定组织的发展有关.
- 其中的例子包括面骨中的tenascin-C,中枢神经系统中的tenascin-R和骨中的tenascin-W.
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