在阿拉比多普西斯 (Arabidopsis) хлоропласт基因组中,逆转基因识别了rps16作为一个转录的伪基因
Stephanie Ruf1, Raphael Trösch1, Laura Schollbach1
1Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam-Golm, Germany.
概括
阿拉比多普西斯塑rps16基因是一种非功能性伪基因,被核副本所取代. 缺少这种基因的转质体植物表现出正常的生长和光合作用,证实了它的可用性.
科学领域:
- 植物分子生物学 植物分子生物学
- 叶绿体遗传学 叶绿体遗传学
- 进化基因组学是进化的基因组学.
背景情况:
- 塑基因组编码核糖体蛋白质,但rps16通常会丢失或伪造.
- 阿拉比多普西斯塔利亚纳 (Brassicaceae) 有一个功能不明的注释塑rps16基因.
研究的目的:
- 为了研究阿拉比多普西斯塑体基因组中注释的rps16基因的功能.
- 为了确定rps16是否对于植物生长和光合作用在Arabidopsis中至关重要.
主要方法:
- 利用塑转化技术创造了缺乏rps16基因 (Δrps16) 的阿拉比多普西斯突变种.
- 在各种条件下评估植物生长和光合作用性能.
- 分析了叶绿体转录水平和核糖体足迹,以评估翻译活动.
主要成果:
- 转质体 Δrps16 植物表现出与野生类型相似的生长和光合作用性能.
- 全基因组分析显示,突变体中的塑转化活性没有发生变化.
- 有注释的rps16基因被转录,但似乎是一个伪基因.
结论:
- 阿拉比多普西斯塑rps16基因是一种非功能性伪基因.
- 一个核基因拷贝补偿了塑性质rps16基因的损失.
- 在Arabidopsis中,rps16基因对质细胞功能不至关重要.
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