The mitochondrial genome of the wood-degrading basidiomycete Trametes cingulata

Abstract

We present the 91,500 bp mitochondrial genome of the wood-degrading basidiomycete Trametes cingulata and compare it with the mitochondrial genomes of five additional Basidiomycota species. The Trametes mitochondrial genome encodes 15 proteins, 25 tRNAs and the small and large rRNAs. All of the genes, except one tRNA, are found on the same DNA strand. Several additional ORFs have also been identified; however, their sequences have not been conserved across the species we compared and they show no similarity to any known gene, suggesting that they may not correspond to authentic genes. The presence of endonuclease-like sequences in introns suggests a mechanism that explains the diversity of mitochondrial genome sizes that are unrelated to the gene content.