The complete mitochondrial genome of the fire coral-inhabiting barnacle Megabalanus ajax (Sessilia: Balanidae): gene rearrangements and atypical gene content

Mitochondrial DNA A DNA Mapp Seq Anal. 2016;27(2):1173-4. doi: 10.3109/19401736.2014.936424. Epub 2014 Jul 22.

Abstract

The complete mitochondrial genome of Megabalanus ajax Darwin, 1854 (Sessilia: Balanidae) is reported. Compared to typical gene content of metazoan mitochondrial genomes, duplication of one tRNA gene (trnL2) and absence of another tRNA gene (trnS1) are identified in M. ajax mitochondrial genome. There is a replacement of one tRNA (trnS1) by another tRNA (trnL2) in M. ajax mitochondrial genome compared to Megabalanus volcano mitochondrial genome. Inversion of a six-gene block (trnP-nd4L-nd4-trnH-nd5-trnF) is found between M. ajax/M. volcano and Tetraclita japonica mitochondrial genomes. With reference to the pancrustacean mitochondrial ground pattern, there is an inversion of a large gene block from the light strand to heavy strand in the two Megabalanus mitochondrial genomes, including three PCGs and two tRNAs (nd4L-nd4-trnH-nd5-trnF). Furthermore, four tRNAs (trnA, trnE, trnQ and trnC) exhibit translocation, while translocation and inversion occur in three tRNAs (trnP, trnY and trnK).

Keywords: Gene duplication; Maxillopoda; Sessilia; gene rearrangement; mitochondrial genome.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arthropod Proteins / genetics
  • Base Sequence
  • Gene Rearrangement*
  • Genome, Mitochondrial / physiology*
  • Mitochondrial Proteins / genetics
  • Molecular Sequence Data
  • RNA / genetics
  • RNA, Mitochondrial
  • RNA, Ribosomal / genetics
  • RNA, Transfer / genetics
  • Thoracica / genetics*

Substances

  • Arthropod Proteins
  • Mitochondrial Proteins
  • RNA, Mitochondrial
  • RNA, Ribosomal
  • RNA
  • RNA, Transfer