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metaWGCNA

Overview

This repository contains the analysis pipeline, data, and source code for the metaWGCNA framework: a co-expression analysis of metatranscriptomics to understand organic micropollutants degradation in complex microbiomes. This study applies Weighted Gene Co-expression Network Analysis (WGCNA) to analyze metatranscriptomics and metagenomics from single-omics and multi-omics perspectives at the module level. The main purpose is to understand Organic Micropollutant (OMP) degradation rates in wastewater microbiomes.

metaWGCNA Framework

Objectives

  1. Metatranscriptomics WGCNA: Identify co-expression modules from taxonomic groups and correlate them with OMP degradation rates.
  2. Metagenomics WGCNA: Analyze taxonomic abundance co-occurrence modules and correlate them with OMP degradation.
  3. Cross-Omics Integration: Correlate eigengenes from transcript modules with taxonomic modules.
  4. Functional Enrichment: Perform enrichment analysis (KEGG/NOGs) for modules significantly correlated with degradation.

Repository Structure

metaWGCNA/
├── analysis.Rmd
├── data/
│   ├── raw_counts/
│   │   └── 2024-10-01_spades_transcript_counts.csv
│   ├── metadata/
│   │   ├── clusters.tsv
│   │   ├── coverm_drep-relative_abundances.tsv
│   │   └── nitrosomonas_kbios.csv
│   └── enrichment/
│       ├── gtdbtk.bac120.summary.tsv
│       └── out.bin.all.emapper.annotations.zip
├── images/
│   ├── illustrations/
│   └── results/
└── README.md

Authors and contributions

  • Edir Vidal: Methodology and software development (R), and bioinformatics analysis (gene-set enrichment analysis, cross-omics correlations, etc.).
  • Michaël Pierrelée: Data curation and normalization, guidance on the downstream analyses and statistical validation.
  • Alberto Santos Delgado: Conceptualization and guidance on the WGCNA methodology.
  • Borja Valverde Pérez: Conceptualization and main supervisor of the project.

References

[1] A. B. Rios-Miguel et al., "Predicting and improving the microbial removal of organic micropollutants during wastewater treatment: A review," Chemosphere, vol. 333, p. 138908, 2023.

[2] M. D. J. Lynch and J. D. Neufeld, "Ecology and exploration of the rare biosphere," Nature Reviews Microbiology, vol. 13, no. 4, pp. 217–229, 2015.

[3] A. Jousset et al., "Where less may be more: how the rare biosphere pulls ecosystems strings," The ISME Journal, vol. 11, pp. 853–862, 2017.

[4] Y. Jiang et al., "Metatranscriptomic analysis of diverse microbial communities reveals core metabolic pathways and microbiome-specific functionality," Microbiome, vol. 4, no. 1, p. 2, 2016.

[5] P. Langfelder and S. Horvath, "WGCNA: an R package for weighted correlation network analysis," BMC Bioinformatics, vol. 9, p. 559, 2008.

[6] ——, "Eigengene networks for studying the relationships between co-expression modules," BMC Systems Biology, vol. 1, p. 54, 2007.

[7] P. Vernocchi et al., "Network analysis of gut microbiome and metabolome to discover microbiota-linked biomarkers in patients affected by non-small cell lung cancer," International Journal of Molecular Sciences, vol. 21, no. 22, p. 8730, 2020.

[8] J. Wang et al., "Metagenomic and metatranscriptomic profiling of Lactobacillus casei Zhang in the human gut," npj Biofilms and Microbiomes, vol. 7, no. 1, 2021.

[9] Y. Feng et al., "Transformation of atenolol by a laccase-mediator system: Efficiencies, effect of water constituents, and transformation pathways," Ecotoxicology and Environmental Safety, vol. 183, p. 109555, 2019.

[10] P. Thathola et al., "Laccase-mediated degradation of emerging contaminants: unveiling a sustainable solution," Environmental Science: Advances, vol. 3, no. 11, pp. 1500–1512, 2024.

[11] D. Chmelová et al., "Laccases as effective tools in the removal of pharmaceutical products from aquatic systems," Life, vol. 14, no. 2, p. 230, 2024.

[12] A. Chukwubuikem et al., "Role of phenazine-enzyme physiology for current generation in a bioelectrochemical system," Microbial Biotechnology, vol. 14, no. 4, pp. 1613–1626, 2021.

[13] Z. Ren et al., "Application of exogenous redox mediators in anaerobic biological wastewater treatment: A critical review," Journal of Cleaner Production, vol. 372, p. 133527, 2022.

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