関連する実験動画
Updated: Jul 11, 2026

11:41
Mapping Mammalian 3D Genome Interactions with Micro-C-XL
Published on: November 3, 2023
ペアエンドマッピングは,ヒトゲノムの広範な構造的多様性を明らかにしています
Jan O Korbel1, Alexander Eckehart Urban, Jason P Affourtit
1Molecular Biophysics and Biochemistry Department, Yale University, New Haven, CT 06520, USA.
まとめ
この研究は,ヒトゲノムにおける大規模な構造変異 (SV) を識別するためのペアエンドマッピング (PEM) を導入します. 研究者は1000以上のSVを発見し,これまで考えられていたよりも大きなヒトの遺伝的多様性を明らかにしました.
科学分野:
- ゲノミクスゲノミクスとは
- 分子生物学は分子生物学である.
- バイオインフォマティックス
背景:
- ゲノム構造的変異 (SV) は,削除,重複,逆転などの大規模な変化を含む.
- SVを理解することは,ヒトの遺伝的多様性と病気を理解するために不可欠です.
研究 の 目的:
- 人間のゲノムにおける大型構造変異 (SV) を特定するための高通量配列決定法を開発し,適用する.
- 異なるヒト集団におけるSVの風景を特徴づけ,その機能的影響を調査する.
主な方法:
- 高スループットと大規模なペアエンドマッピング (PEM) の導入,ゲノムシーケンシング技術.
- 454配列と計算分析を使用して,DNAの読み取りをマッピングし,約3キロベースまたはそれ以上のSVを識別します.
- 新しいプール戦略と計算分析を用いて,200以上のSVのブレイクポイント交差点の配列を決定した.
主要な成果:
- アフリカとヨーロッパの個体における1000以上の構造変異 (SV) の微細マッピング.
- 参照ゲノムと比較した共有および異なったSVの識別.
- 人間におけるSVsの数は,これまで考えられていたよりも大幅に多く,多くのSVsが遺伝子機能に潜在的に影響を及ぼすことが実証された.
結論:
- この研究は,ヒトゲノムの構造的多様性の広大で過小評価されている風景を明らかにしています.
- ペアエンドマッピング (PEM) は,大規模なSV検出のための効果的な方法です.
- 人間における構造変異形成の基礎となるメカニズムについての洞察が得られた.
関連する概念動画
Evolutionary Relationships through Genome Comparisons
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...
Multi-species Conserved Sequences
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 DNA...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Karyotyping
Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...
Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
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.
Synteny and Evolution
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...

