在线粒体衍生的素人氨酸和SHLP6中,自然选择的证据
James M Gruschus1, Daniel L Morris2, Nico Tjandra2
1Laboratory of Structural Biophysics, Biochemistry and Biophysics Center, NHLBI, NIH, 50 South Drive, Bethesda, MD, 20892, USA. gruschuj@nih.gov.
Scientific reports
|August 29, 2023
概括
在核糖体RNA基因中编码的线粒体衍生被分析出其生物重要性. 人类素和SHLP6显示显著的保护,表明功能性作用,而其他缺乏重要的证据.
科学领域:
- 线粒体生物学 线粒体生物学
- 分子遗传学 分子遗传学
- 类信号传递 类信号传递
背景情况:
- 线粒体衍生 (MDPs) 是由线粒体DNA编码的,并发挥细胞外功能.
- 八个MDPs,包括人氨酸和六个SHLP,来自线粒体核糖体RNA基因.
- 大多数MDPs在正常细胞功能中的生物学意义在很大程度上是未知的.
研究的目的:
- 评估 mitochondrial ribosomal RNA 基因中编码的 MDPs 的功能重要性.
- 调查序列保护和同名编码子偏差作为生物相关性的指标.
- 识别可能重要的新型MDP.
主要方法:
- 在MDPs的脊椎动物编码序列中分析同名编码子偏差.
- 跨物种的比较序列保护评估.
- 识别新的MDP序列.
主要成果:
- 人类素和SHLP6表现出强烈的同名编码子偏差和序列保存,表明其功能重要性.
- SHLP1,SHLP2,SHLP3和SHLP5没有显著的偏差和糟糕的保存,这表明它们的作用有限.
- MOTS-c,SHLP4和新发现的SHLP2b具有保留的N终端区域,需要进一步研究.
结论:
- 同义代码子偏差和序列保存是MDP功能重要性的可靠指标.
- 人类素和SHLP6可能是功能性显著的线粒体衍生.
- 需要进一步的研究来阐明MOTS-c,SHLP4和SHLP2b的作用,因为这些区域受到保护.
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