rDNAcaller:高速かつ堅牢なリボソームDNAバリアント呼び出しパイプライン
Jose Miguel Ramirez1,2, Winona Oliveros1, Raquel García-Pérez1
1Department of Life Sciences, Barcelona Supercomputing Center (BSC), C/ Jordi Girona 29, Barcelona 08034, Spain.
NAR genomics and bioinformatics
|December 22, 2025
まとめ
ヒトゲノムのリボソームDNA(rDNA)バリアント解析のための新しいツールであるrDNAcallerを開発しました。この方法は、高度に反復的なrDNA領域の遺伝子バリアントを正確に検出し、表現型の多様性に関する理解を深めます。
科学分野:
- ゲノミクス
- ヒト遺伝学
- バイオインフォマティクス
背景:
- リボソームDNA(rDNA)は、ヒトゲノム内のタンデムリピートとして存在します。
- rDNAにおける有意な遺伝的およびコピー数バリアントは、表現型の多様性に寄与します。
- 既存のバリアントコラーは、高倍数性rDNA領域の解析には最適化されていません。
研究 の 目的:
- rDNA解析のための従来のバリアントコラーのベンチマーク。
- 正確なrDNAバリアント検出のための新しいパイプライン、rDNAcallerの開発。
- ヒト集団におけるrDNAバリアントの探索。
主な方法:
- 現実的な個体内および個体間rDNAバリアントのためのカスタムシミュレータを開発しました。
- バリアント呼び出し精度の向上に最適化された前処理およびマッピング手順。
- ショートリード全ゲノムシーケンスデータを利用するパイプライン、rDNAcallerを導入しました。
主要な成果:
- rDNAcallerは実験データで94%の精度を達成しました。
- 1000ゲノムプロジェクトデータセットを使用して、ヒト集団全体で5607の新規rDNAバリアント位置を特定しました。
- アフリカの個人が最も多くのrDNAバリアントを示しました。
結論:
- rDNAcallerは、既存の方法の制限を克服する高倍数性rDNAバリアント解析のための堅牢なツールです。
- 正確なrDNAバリアント検出は、表現型多様性におけるrDNAの役割のより深い探求を促進します。
- この発見は、将来のゲノム研究を支持し、健康と疾患におけるrDNA生物学の理解を深めます。
関連する概念動画
Ribosome Profiling
4.0K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
4.0K
RNA-seq
11.7K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
11.7K
RACE - Rapid Amplification of cDNA Ends
7.1K
Rapid Amplification of cDNA Ends, or RACE, is one of the most effective methods to obtain a full-length cDNA from an mRNA sequence between a known internal region to the unknown sequence at the 5’ or 3’ end. The unknown region is cloned in the cDNA by a gene-specific primer that binds the known end, and a hybrid primer that attaches a predefined anchor sequence to the unknown end of the cDNA. The sequence in between is amplified by PCR with an anchor primer and a gene-specific...
7.1K
Ribosomal RNA Synthesis
4.1K
4.1K
Ribosomal RNA Synthesis
14.6K
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
14.6K
Sanger Sequencing
772.8K
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...
772.8K


