一个由一个纳米大小的超热友好性共生体代表的新属的Archaea
Harald Huber1, Michael J Hohn, Reinhard Rachel
1Lehrstuhl für Mikrobiologie und Archaeenzentrum, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany.
Nature
|May 3, 2002
概括
科学家们发现了一种新的考古学科,
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 基于小子单元核糖体RNA (ssrRNA) 的古生物分类包括Crenarchaeota,Euryarchaeota和Korarchaeota.
- 目前,Korarchaeota只能从环境DNA序列中得知.
研究的目的:
- 从潜艇的热通风中培养和描述一个新的archaeon.
- 为了确定这个新古物种的遗传学定位.
- 为了研究其独特的生物特征.
主要方法:
- 从海底热通风机培养出一种超热友的古典体.
- 小子单元核糖体RNA (ssrRNA) 序列分析.
- 基因组大小的确定.
主要成果:
- 培育了一个新的纳米大小的高热友的archaeon",Nanoarchaeum equitans".
- "N.N. 的意思是说. "equitans"代表了一种新的考古学科",Nanoarchaeota",与已知的学科不同.
- 这种archaeon生长时附着在一个特定的宿主Ignicoccus上.
- "N.N. 的意思是说. 马匹的基因组是已知最小的古人类基因组 (0.5兆基).
- 其不寻常的ss rRNA序列使其无法通过基于PCR的标准生态研究来检测.
结论:
- "纳米考古物种"代表了一种以前未知的主要考古遗迹.
- 发现'N. 的发现. "equitans"提供了对热性,最小基因组和物种间相互作用的演变的见解.
- 这一发现扩大了我们对考古物种多样性和进化的理解.
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