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Separation of Single-stranded DNA, Double-stranded DNA and RNA from an Environmental Viral Community Using Hydroxyapatite Chromatography
Published on: September 29, 2011
cDNA normalization by hydroxyapatite chromatography to enrich transcriptome diversity in RNA-seq applications
Victoria A Vandernoot1, Stanley A Langevin, Owen D Solberg
1Biotechnology and Bioengineering Department, Sandia National Laboratories, Livermore, CA, USA.
Biotechniques
|December 12, 2012
Summary
A new hydroxyapatite chromatography (HAC) method efficiently removes ribosomal RNA (rRNA), enhancing RNA sequencing (RNA-seq) for better transcriptome diversity analysis. This cost-effective technique offers a non-destructive alternative for RNA normalization.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- Second-generation sequencing (SGS) is vital for RNA transcriptome profiling.
- Ribosomal RNA (rRNA) constitutes up to 95% of total RNA, hindering analysis of other transcripts.
- Efficient depletion of rRNA is crucial for comprehensive transcriptome diversity analysis.
Purpose of the Study:
- To introduce a novel microscale hydroxyapatite chromatography (HAC) method for rRNA depletion.
- To evaluate HAC's effectiveness in increasing RNA sequencing (RNA-seq) coverage depth and transcript diversity.
- To establish microscale HAC as a cost-effective and non-destructive normalization technique.
Main Methods:
- Development of a microscale hydroxyapatite chromatography (HAC) technique for normalization.
- Application of HAC to deplete high-abundant rRNA from prokaryotic (Escherichia coli K-12) and eukaryotic (human) total RNA samples.
- Comparison of HAC-normalized libraries with untreated controls and established rRNA depletion methods (DSN, Ribo-Zero).
Main Results:
- HAC normalization effectively removed both eukaryotic and prokaryotic rRNA species.
- HAC significantly enriched all non-ribosomal RNA species, irrespective of abundance or length.
- Microcolumn HAC generated rRNA-depleted cDNA libraries comparable to DSN and Ribo-Zero methods.
Conclusions:
- Microscale HAC is an effective method for depleting rRNA, enhancing RNA-seq analysis.
- HAC increases sequence coverage depth and transcript diversity in non-rRNA populations.
- Microscale HAC presents a viable, economical, and non-destructive alternative for RNA normalization.
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