絶滅した毛深いマンモスの核ゲノムの配列を解析
Webb Miller1, Daniela I Drautz, Aakrosh Ratan
1Pennsylvania State University, Center for Comparative Genomics and Bioinformatics, 310 Wartik Building, University Park, Pennsylvania 16802, USA. webb@bx.psu.edu
Nature
|November 21, 2008
まとめ
研究者たちは毛皮のマモスのゲノムを配列化し,絶滅した種の内での広範な遺伝的多様性を明らかにしました. この古代のDNA分析は,マンモスの集団の違いと進化の歴史についての洞察を提供します.
科学分野:
- パレオゲノミクスとは
- 進化生物学の進化生物学について
- 哺乳類の遺伝学について
背景:
- 古代DNA (aDNA) 研究は,断片化によって制限され,短いミトコンドリア配列に焦点を当てています.
- 以前の研究では,プレイストセンのマモスのDNAを特定しましたが,包括的なゲノムデータはありませんでした.
- 絶滅した種のゲノムを理解することは,進化と絶滅に関する研究にとって極めて重要です.
研究 の 目的:
- 絶滅したマンモスの標本から広範なゲノム全体の配列データを生成する.
- マンモスの集団内およびママンモスと現存するゾウの間の遺伝的多様性と分岐率を分析する.
- 絶滅種における集団動態と絶滅因子を明らかにするために,核ゲノム配列決定の可能性を調査する.
主な方法:
- マンモスの複数の標本からDNA抽出.
- 約41億7000万塩基 (Gb) の配列化で,その3.3Gbは毛深いマンモス (Mammuthus primigenius) のゲノムから得られた.
- アフリカゾウのゲノムと比較したゲノム分析.
主要な成果:
- 絶滅した種の全ゲノム配列データの中で,これまでで最も広範なデータを生成した.
- マンモットとアフリカゾウの分岐率は,ヒトとチンパンジーの半分と推定されています.
- マンモスの核酸の差異を特定し,150~200万年の隔たりを示した.
- マンモスとアフリカゾウの間で保存された哺乳類の位置でのアミノ酸の違いを発見した.
結論:
- 絶滅した種の核ゲノム配列解析は,人口構造と進化史に関する前例のない洞察を提供します.
- 古代のDNA分析は,絶滅に潜在的に寄与する遺伝的要因を明らかにすることができます.
- この研究は,マンモスの進化と古生物学に関する私たちの理解を大幅に前進させます.
関連する概念動画
Evolutionary Relationships through Genome Comparisons
5.8K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.8K
Multi-species Conserved Sequences
3.3K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
3.3K
Sanger Sequencing
800.8K
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
800.8K
Next-generation Sequencing
87.9K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
87.9K
Maxam-Gilbert Sequencing
10.5K
In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Challenges of the Maxam-Gilbert Method
The...
10.5K
Introduction to Nuclear Reprogramming
1.3K
Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
1.3K


