Nucleotide Distribution Patterns in Insect Genomes

TL;DR

This study examined nucleotide distribution patterns across ten insect genomes, revealing that internal measures like GC variation and codon preference are more consistent than genome size or overall GC content, with notable variations in hymenopteran insects.

Contribution

It provides a comparative analysis of nucleotide distribution patterns in insect genomes, highlighting internal measure consistency and unique features in honeybee and hymenopteran genomes.

Findings

Hymenopteran genomes show highest GC variation among analyzed eukaryotes.

Honeybee genome exhibits high GC variation and unusual gene location patterns.

Genomes of honeybee and beetle have similar overall GC levels but differ internally.

Abstract

This work analyzed genome-wide nucleotide distribution patterns in ten insect genomes. Two internal measures were applied: (i) GC variation and (ii) third codon nucleotide preference. Although the genome size and overall GC level did not show any correlation with insect order, the internal measures usually displayed higher levels of consistency. GC variations in genomes of hymenopteran insects, honeybee and wasp, ranked highest among all eukaryotic genomes analyzed by us. Genomes of honeybee and beetle, insects of different orders with similar overall GC levels, showed significant internal differences. Honeybee genome stood out as unusual due to its high GC variation and 'left-handed' gene locations.