Mitochondrial genome of the basidiomycetous yeast Jaminaea angkorensis

Eva Hegedusova, Brona Brejova, Lubomir Tomaska, Matthias Sipiczki, Jozef Nosek

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Jaminaea angkorensis is an anamorphic basidiomycetous yeast species originally isolated from decaying leaves in Cambodia. Taxonomically, J. angkorensis is affiliated with Microstromatales (Exobasidiomycetes, Ustilaginomycotina, Basidiomycota) and represents a basal phylogenetic lineage of this fungal order. To perform a comparative analysis of J. angkorensis with other basidiomycetes, we determined and analyzed its complete mitochondrial DNA sequence. The mitochondrial genome is represented by 29,999 base pairs long, circular DNA containing 32 % guanine and cytosine residues. Its genetic organization is relatively compact and comprises typical genes for 15 conserved proteins involved in oxidative phosphorylation (atp6, 8, and 9; cob; cox1, 2, and 3; and nad1, 2, 3, 4, 4L, 5, and 6) and translation (rps3), two ribosomal RNAs (rnl and rns) and twenty-two transfer RNAs (trnA-Y). Although the gene content is similar to other basidiomycetes, the gene orders in the examined species exhibit only a limited synteny, reflecting their phylogenetic distances and extensive genome rearrangements. In addition, a comparative analysis of basidiomycete mitochondrial genomes indicates that stop-to-tryptophan reassignment of the UGA codon was accompanied by structural alterations of tRNA-Trp(CCA). These results provide an insight into the evolution of the genetic code in fungal mitochondria.

Original languageEnglish
Pages (from-to)49-59
Number of pages11
JournalCurrent Genetics
Volume60
Issue number1
DOIs
Publication statusPublished - Feb 1 2014

Keywords

  • Basidiomycota
  • Codon usage
  • Jaminaea angkorensis
  • Mitochondrial DNA
  • Molecular phylogeny
  • tRNA-Trp

ASJC Scopus subject areas

  • Genetics

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