HVRLocator

HVRLocator identifies hypervariable regions in 16S rRNA amplicon sequencing data to determine sequenced variable regions and improve metadata accuracy for microbiome analyses.

Key Features:

• Hypervariable Region Identification: HVRLocator accurately identifies sequenced hypervariable regions from amplicon sequencing variants or public sequence read archives (SRA) by aligning to an E. coli full-length 16S rRNA gene reference.
• Metadata Enhancement: By determining the hypervariable region, HVRLocator improves metadata quality for downstream analyses and reuse in large-scale microbiome studies.
• Efficiency and Accuracy: The tool processes samples at an average rate of 0.147 per minute with confirmed 100% accuracy in predicting alignment positions and matching expected primer regions from the literature.

Scientific Applications:

• Data Curation: It streamlines curation by assigning the correct amplified region when metadata or literature are inconsistent or missing.
• Database Construction: It facilitates selection of appropriate and comparable sequences for constructing global bacterial databases, as demonstrated with V4 region amplicons from 16S rRNA sequencing.
• Error Identification: It identifies discrepancies in metadata labeling, such as sequences mislabelled as targeting the V4 region.

Methodology:

HVRLocator aligns query sequences to an E. coli full-length 16S rRNA reference and determines the spanning hypervariable region from the resulting alignments.