Megraft

Megraft grafts short ribosomal small subunit (SSU) gene fragments from metagenomic libraries onto full-length SSU sequences to improve rarefaction-based estimates of species richness and sequencing depth for 16S/18S analyses.

Key Features:

• Grafting of SSU fragments: Grafts short SSU fragments from metagenomes onto full-length SSU sequences.
• Fragment handling: Accounts for fragmentary and non-overlapping SSU sequences typical of metagenomic data.
• Rarefaction support: Supports rarefaction analysis of SSU genes (16S/18S) to assess sequencing effort.
• Integration of variability: Integrates observed and unobserved variability within datasets to enhance reliability of diversity estimates.
• Improved richness and depth estimation: Enables more accurate estimation of species richness and sequencing depth from metagenomic SSU data.
• Inclusion of incomplete sequences: Ensures incomplete SSU sequences contribute to biodiversity estimates.
• Target data type: Operates on metagenomic libraries as subsamples of total DNA from specific study sites.

Scientific Applications:

• Rarefaction assessment: Estimating sequencing effort and rarefaction curves for 16S/18S SSU genes in metagenomic studies.
• Microbial diversity analysis: Assessing microbial community composition and species richness from metagenomic data.
• Ecological and functional microbiome studies: Supporting ecological and functional analyses of microbiomes that require precise species richness and sequencing depth measurements.

Methodology:

Grafts short SSU fragments onto full-length SSU sequences and integrates observed and unobserved variability to perform rarefaction analysis of 16S/18S SSU genes in metagenomic libraries.