来自已灭绝的塔斯马尼亚老虎的历史RNA表达特征
Emilio Mármol-Sánchez1,2, Bastian Fromm3,4, Nikolay Oskolkov5
1Department of Molecular Biosciences, The Wenner-Gren Institute, Science for Life Laboratory, Stockholm University, 114 18 Stockholm, Sweden; marc.friedlander@scilifelab.se love.dalen@zoologi.su.se emilio.marmol.sanchez@gmail.com.
Genome research
|July 18, 2023
概括
研究人员成功地从塔斯马尼亚老虎中提取和分析了历史的RNA,为灭绝的物种提供了基因表达数据. 这一突破为古代生物学和进化论提供了新的见解.
科学领域:
- 古遗传学是古遗传学的一部分.
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 古遗传学利用古代DNA研究已灭绝物种的进化和生态.
- DNA 测序错过了关键的转录数据,如基因表达和细胞身份.
- 以前从古老的永久土和历史皮肤中提取RNA是有限的,没有尝试灭绝的物种.
研究的目的:
- 从已灭绝的物种 (塔斯马尼亚老虎) 中提取,测序和分析历史RNA.
- 从古代标本中获得转录概况和基因表达动态.
- 改进注释,并在已灭绝的动物中发现新的遗传元素.
主要方法:
- 从130岁的塔斯马尼亚老虎标本中提取和测序RNA.
- 对转录资料,元转录组学和RNA损伤模式的分析.
- 全基因组表达热点分析和注释改进.
主要成果:
- 从塔斯马尼亚老虎肌肉和皮肤组织中成功检索历史RNA.
- 转录资料与现存物种相似,揭示了解剖特征,并证实了鱼的起源.
- 改进了基因注释,包括microRNAs (从62到325),并发现了一种特定于甲鱼的microRNA异型.
- 检测RNA病毒,表明病毒进化研究的潜力.
结论:
- 这是从已灭绝的动物中首次成功提取转录资料.
- 历史的RNA分析提供了关于灭绝物种基因表达动态的丢失信息.
- 这种方法对研究博物馆藏品和永久土遗迹中的古代RNA具有重要意义.
相关概念视频
Ribosome Profiling
3.6K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.6K
Non-LTR Retrotransposons
11.6K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.6K


