人間の染色体2と4のDNA配列の生成とアノテーション
Ladeana W Hillier1, Tina A Graves, Robert S Fulton
1Genome Sequencing Center, Washington University School of Medicine, Campus Box 8501, 4444 Forest Park Avenue, St. Louis, Missouri 63108, USA.
Nature
|April 9, 2005
まとめ
この研究では,ヒト染色体2と4の配列を解析し,何千もの遺伝子と擬似遺伝子を特定しました. この発見は,哺乳類の染色体構造と進化の理解を深める.
科学分野:
- ゲノミクスゲノミクスとは
- 人間の遺伝学 人間の遺伝学
- 進化生物学の進化生物学について
背景:
- 人間の染色体2は2つの祖先染色体の融合によって形成されたユニークなものです.
- 染色体4は,ハンティントン病やウルフ・ヒルシュホーン症候群などの遺伝疾患と関連しています.
研究 の 目的:
- ヒト染色体2および4の包括的な配列データを提示する.
- 遺伝子の内容を分析し,これらの染色体内の構造要素を特定する.
- 哺乳類の染色体構造と進化の理解を深める.
主な方法:
- 染色体2と4のユークロマティック配列を決定するための高通量配列解析.
- 遺伝子識別と擬似遺伝子アノテーションのためのバイオ情報分析.
- 比較ゲノミクスは,染色体構造と進化パターンを研究する.
主要な成果:
- 染色体2の塩基配列の約23700万対と,染色体4の塩基配列の約18600万対が決定されました.
- 染色体2で1,346のタンパク質をコードする遺伝子と1,239の擬似遺伝子が特定されました.
- タンパク質をコードする遺伝子は796種,偽遺伝子は778種で,染色体4で確認された.
- 分析により,遺伝子砂漠,セグメンタル重複,および高度に変異する領域が明らかになった.
結論:
- 配列化されたデータは,ヒト遺伝学研究のための高品質のリソースを提供します.
- この発見により,哺乳類の染色体組織と進化的メカニズムに関する知識が拡がる.
- この研究は,染色体2と4に関連した疾患の遺伝的基礎を理解するのに役立ちます.
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Overview
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
Polytene Chromosomes
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
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Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
Genome Annotation and Assembly
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.


