Mitochondrial Genomes of Three Species of the Family Camaenidae (Gastropoda: Stylommatophora): Structural Features, Codon Usage Patterns, and Phylogenetic Implications.

ABSTRACT: This study sequenced the complete mitochondrial genomes of three Camaenidae snail species (Acusta ravida, Bradybaena similaris, and Trichobradybaena submissa). Each mitogenome contained the typical 37 genes (13 PCGs, 22 tRNAs, and 2 rRNAs), with most tRNAs forming clover structures (except trnK, trnH, trnN, trnS1, trnS2, and trnR). Comparative analysis with nine existing Camaenidae mitogenomes revealed: (1) The nucleotide composition of mitochondrial genes was significantly skewed toward A and T; (2) Most protein genes used ATN start codons and TAA/T- stop codons; (3) Synonymous codons ending with T/A were dominant. Analyses (PR2-plot, neutrality plot) indicated codon usage was influenced by both mutation pressure and natural selection. Phylogenetically, the three newl

SUBMITTER: Ran XM 

PROVIDER: S-EPMC12515985 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature