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Robust, Open-Source and Automation-Friendly DNA Extraction Protocol for Hologenomic Research.

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We developed a new open-source nucleic acid extraction method for vertebrate fecal samples. This standardized, high-throughput protocol (DREX) generates comparable genomic and metagenomic data, improving research reproducibility.

Keywords:
automationisolationlaboratory protocolmetagenomicsnucleic acid

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Area of Science:

  • Genomics and Microbiology
  • Bioinformatics and Computational Biology

Background:

  • Standardized methodologies are crucial for generating comparable data in global research efforts.
  • Open-source procedures facilitate data standardization and reproducibility.

Purpose of the Study:

  • To present a modular, high-throughput nucleic acid extraction protocol (DREX) standardized within the Earth Hologenome Initiative.
  • To enable the generation of both genomic and microbial metagenomic data from vertebrate fecal samples.

Main Methods:

  • The DREX protocol allows purification of RNA and DNA in separate fractions (DREX1) or as total nucleic acids (DREX2).
  • Effectiveness was demonstrated across fecal samples from amphibians, reptiles, and mammals.
  • Performance was benchmarked against a widely used commercial kit for microbiome research.

Main Results:

  • Both DREX1 and DREX2 yielded highly similar microbial community profiles and comparable host genome coverages.
  • The method showed effectiveness across various vertebrate taxa, with reduced performance on bird guano.
  • Benchmarking confirmed comparable recovery of host genomic data and microbial community complexity versus a commercial kit.

Conclusions:

  • The open-source DREX method is a robust, cost-effective, scalable, and automation-friendly procedure for high-quality hologenomic data generation.
  • It enhances research comparability and reproducibility through standardized, high-throughput, open-access protocols.
  • The modular design supports integration into automated pipelines and continuous improvement.