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Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples

Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples

Published on: December 22, 2014

Controlling taxa abundance improves metatranscriptomics differential analysis.

Zhicheng Ji¹, Li Ma^2,3

¹Department of Biostatistics and Bioinformatics, Duke University, Durham, USA. zhicheng.ji@duke.edu.

BMC Microbiology

|March 7, 2023

Summary

This summary is machine-generated.

Analyzing metatranscriptomics data requires controlling for both DNA and taxa abundances. Simultaneous control improves differential RNA abundance analysis compared to controlling only one factor.

Keywords:

Differential analysis Metatranscriptomics Microbiome Shotgun sequencing

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Area of Science:

Microbial ecology
Metagenomics
Metatranscriptomics
Bioinformatics

Background:

Identifying differential microbial RNA abundance across sample groups is crucial for metatranscriptomics analysis.
Existing methods often control for DNA or taxa abundance due to their correlation with RNA abundance.
The necessity of simultaneously controlling for both DNA and taxa abundance remains unexplored.

Purpose of the Study:

To investigate whether controlling for both DNA and taxa abundances is necessary for accurate differential RNA abundance analysis in metatranscriptomics.
To evaluate the performance of controlling for one versus both factors in differential analysis.

Main Methods:

Utilized paired metagenomics and metatranscriptomics data.
Performed simulation studies to assess analytical methods.
Conducted a real-data analysis on a biological sample set.

Main Results:

Controlling for only DNA or taxa abundance resulted in significant residual correlation with the other factor.
Methods controlling for both DNA and taxa abundances demonstrated superior performance in simulation studies.
Real-data analysis corroborated the findings from simulations, highlighting the benefit of dual control.

Conclusions:

Simultaneous control of both DNA and taxa abundances is essential to mitigate confounding effects in metatranscriptomics differential analysis.
This approach enhances the accuracy and reliability of identifying differentially abundant microbial metabolic pathways.