Related Experiment Video
Updated: Jun 3, 2026
05:12
AQRNA-seq for Quantifying Small RNAs
Published on: February 2, 2024
Construction of normalized RNA-seq libraries for next-generation sequencing using the crab duplex-specific nuclease
Danos C Christodoulou1, Joshua M Gorham, Daniel S Herman
1Harvard Medical School, Boston, Massachusetts, USA.
Current Protocols in Molecular Biology
|April 8, 2011
Summary
This study introduces a novel RNA sequencing method to efficiently detect low-abundance RNAs. By reducing the dominance of highly expressed RNAs, it allows for a deeper analysis of the entire transcriptome.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- RNA sequencing (RNA-seq) is crucial for transcriptome analysis.
- High dynamic range of gene expression requires extensive sequencing for low-abundance RNA detection.
- Current methods face challenges in comprehensively characterizing transcriptomes due to abundant RNA species.
Purpose of the Study:
- To develop an efficient RNA sequencing method for low-abundance RNA detection.
- To normalize the dynamic range of RNA species in sequencing libraries.
- To improve the characterization of the full spectrum of transcriptomes.
Main Methods:
- Utilizes crab duplex-specific nuclease for RNA normalization.
- Applies principles of DNA annealing kinetics, similar to expressed sequence tag (EST) library generation.
- Involves denaturation, partial re-annealing, and digestion of rapidly re-annealing (abundant) cDNA species.
Main Results:
- Significantly reduces the proportion of sequence reads from highly expressed RNAs.
- Enhances the ability to detect and analyze low-abundance RNA species.
- Facilitates a more comprehensive assessment of transcriptome sequence and structure.
Conclusions:
- The described method enables efficient sequencing of low-abundance RNAs.
- This approach overcomes limitations of traditional RNA-seq by normalizing abundant transcripts.
- It offers a powerful tool for in-depth transcriptome analysis and discovery.
Related Concept Videos
03:21RNA-seq
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 microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
03:00Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.