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Integrated detection of natural antisense transcripts using strand-specific RNA sequencing data.

Song Li¹, Louisa M Liberman, Neelanjan Mukherjee

¹Institute for Genome Sciences & Policy, Duke University, Durham, North Carolina 27708, USA;

Genome Research

|July 3, 2013

Summary

This summary is machine-generated.

Researchers developed a new computational method to identify cis-natural antisense transcripts (cis-NATs) using strand-specific RNA sequencing. This method discovered 918 new cis-NAT pairs in Arabidopsis, revealing their regulatory roles in gene expression.

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Area of Science:

Genomics
Molecular Biology
Bioinformatics

Background:

Cis-natural antisense transcripts (cis-NATs) are RNA pairs regulating gene expression.
Strand-specific RNA sequencing (ssRNA-seq) is a key tool for profiling RNA.
Accurate cis-NAT identification requires robust computational methods.

Purpose of the Study:

To develop and apply a novel computational method for identifying cis-NATs from ssRNA-seq data.
To discover novel cis-NATs in Arabidopsis and characterize their properties.
To investigate the regulatory roles and epigenetic associations of plant cis-NATs.

Main Methods:

Development of a model comparison framework for cis-NAT identification from ssRNA-seq.
Application of the method to whole-root and cell-type-specific Arabidopsis RNA sequencing data.
Integration of polyadenylation, alternative splicing, RT-PCR, epigenetic, and small-RNA sequencing data for validation and analysis.

Main Results:

The new method confirmed known cis-NATs and identified 918 additional cis-NAT pairs in Arabidopsis.
Validated novel cis-NATs show support from polyadenylation, splicing, and RT-PCR data.
Identified 209 cis-NAT pairs with opposing expression in neighboring cell types, suggesting cell-specific functions.
Discovered a unique chromatin signature associated with cis-NATs and found cis-NAT-derived siRNAs.

Conclusions:

The developed computational method enhances cis-NAT discovery from ssRNA-seq data.
Arabidopsis cis-NATs exhibit diverse regulatory roles, including cell-type-specific functions.
Cis-NAT transcription is linked to chromatin modification in plants, highlighting multifaceted regulatory potential.