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単一分子配列解析を用いてヒトゲノムの複雑さを解明する.
Mark J P Chaisson1, John Huddleston2, Megan Y Dennis1
1Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington 98195, USA.
Nature
|November 11, 2014
まとめ
新しい配列解析技術は,ヒトゲノム内のギャップを解決し,複雑な変異を明らかにします. この進歩は,繰り返しDNAと構造変異の理解を向上させ,ヒトの参照ゲノムを強化します.
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:
- ヒトゲノム参照アセンブリは,その完全さにもかかわらず,160以上のエウクロマティック・ギャップを含んでいます.
- ヒトゲノム内の構造的変異は,最初の完成から10年後も,まだ完全に理解されていません.
研究 の 目的:
- 欠けているゲノム配列と遺伝的変異を特定するために.
- より包括的なヒトゲノム分析のために,長年にわたるシーケンシング技術を活用する.
主な方法:
- 単一分子,リアルタイム (SMRT) DNAシーケンシングを使用してハプロイドヒトゲノム (CHM1) のシーケンシングと分析.
- ユークロマティック構造変異のベースペアレベルの解像度.
主要な成果:
- GRCh37参照ゲノムの残りの間隙の55%を閉じまたは拡張し,その多くはG+C豊富な領域内の長い,退廃した短いタンデムリピートを含んでいます.
- 逆転,複雑な挿入,および長いタンデム繰り返しを含む26,079のユークロマティック構造変異を解決し,イベントに対する高感度<5キロベース.
- 人間の基準と比較して,複雑な挿入と長い短いタンデムリピートを持つ領域で 3:1の挿入バイアスを特定しました.
結論:
- ロングリーディングシーケンシング技術は,これまでアクセスできない複雑な重複DNAを解決することができます.
- 人間のゲノムは,構造的多様性において,特に,より長く,より複雑な繰り返し要素に関して,より大きな複雑性を表しています.
- この研究は,ヒトゲノムの構造的多様性の特徴を大幅に強化します.
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