人間のゲノムにおける結合不均衡
1Whitehead Institute / MIT Center for Genome Research, Nine Cambridge Center, Cambridge, Massachusetts 02142, USA. reich@genome.wi.mit.edu
Nature
|May 11, 2001
まとめ
疾患遺伝子の結合不均衡 (LD) マッピングは,北米の集団では実用的で,LDは約60kbに及ぶ. この発見は,ナイジェリアの人口と対照的に,LDパターンが古代の人口統計的出来事を反映していることを示唆しています.
科学分野:
- 人間の遺伝学 人間の遺伝学
- 人口遺伝学 人口遺伝学
- ゲノムマッピング ゲノムマッピング
背景:
- シングル・ヌクレオチド・ポリモルフィズム (SNPs) の密集した全ゲノムマップは,疾患の遺伝子マッピングのために結合不均衡 (LD) を使用する可能性を高めます.
- マッピング解像度にとって極めて重要なLDブロックの範囲は議論されており,推定値は数キロベース (kb) から100kb以上までである.
研究 の 目的:
- 統一プロトコルを使用して,複数のゲノム領域におけるLDの範囲を体系的に調査する.
- 異なる集団における疾患遺伝子のLDマッピングの可行性を決定する.
主な方法:
- 均一な実験プロトコルを使用して,ランダムに選択された19のゲノム領域を調べました.
- 北欧系北米人集団とナイジェリア人集団におけるLDパターンを分析した.
主要な成果:
- 北欧系出身の集団では,LDは通常,一般的なSNPから約60kbの範囲に広がっており,LDのマッピングが実用的であることを示唆しています.
- LDは,北ヨーロッパ出身の集団と比較して,ナイジェリアの集団に著しく少なく広がります.
- 北欧人の観察されたLDパターンは,2700053000年前の人口学的出来事の影響を示唆しています.
結論:
- LDマッピングは,北欧系の子孫などの広範なLDを有する集団における疾患遺伝子発見のための潜在的に実用的なアプローチです.
- 集団間のLDの範囲の差異は,人間の進化史と人口統計学的な出来事についての洞察を提供します.
さらに関連する動画
関連する概念動画
Mismatch Repair
Overview
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Mismatch Repair
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Gene Conversion
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Human Genetics
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
Genetic Variation
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...
Genes exist in different versions called alleles, which...


