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Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing
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Published on: August 25, 2018

Reference databases for taxonomic assignment in metagenomics.

Monica Santamaria1, Bruno Fosso, Arianna Consiglio

  • 1Institute of Biomembranes and Bioenergetics, National Research Council, Bari, Italy.

Briefings in Bioinformatics
|July 13, 2012
PubMed
Summary
This summary is machine-generated.

Metagenomics reveals microbial diversity using DNA sequencing. This study reviews fungal internal transcribed spacer (ITS) databases for accuracy, introducing ITSoneDB for improved fungal community analysis.

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Area of Science:

  • Environmental microbiology
  • Bioinformatics
  • Molecular ecology

Background:

  • Metagenomics offers broad access to environmental microbial diversity.
  • Amplicon-based metagenomics relies on PCR-targeted sequencing of specific genetic loci.
  • Accurate reference databases are essential for phylogenetic classification of sequence reads.

Purpose of the Study:

  • To review existing reference databases for fungal internal transcribed spacer (ITS) and bacterial 16S ribosomal RNA (rRNA) gene markers used in metagenomics.
  • To highlight the strengths and limitations of current ITS and 16S rRNA databases for environmental microbial community analysis.
  • To introduce ITSoneDB, a new, well-annotated database of fungal ITS1 sequences for metagenomic studies.

Main Methods:

  • Review of existing public reference databases for 16S rRNA and ITS sequences.
  • Development and annotation of the ITSoneDB database with phylogenetically classified ITS1 sequences.
  • Evaluation of database suitability for metagenomic applications.

Main Results:

  • Existing 16S rRNA databases offer consistent phylogenetic classification.
  • Reference databases for fungal ITS regions are less advanced and present limitations for metagenomics.
  • ITSoneDB provides a valuable, curated resource for analyzing fungal communities in environmental metagenomic studies.

Conclusions:

  • Reliable reference databases are critical for accurate metagenomic profiling of microbial communities.
  • The newly developed ITSoneDB database addresses the need for improved fungal ITS1 reference data.
  • ITSoneDB facilitates more accurate taxonomic assignment in environmental fungal metagenomics.