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Abstract:
We characterized the complete sequence of the mitochondrial genome of the freshwater green algal strain YC001, known as ‘Ettlia sp.’, which is of great interest for biofuel production. The size of the mitogenome was 52,489 base pairs (bp), with 49.0% GC content. It consisted of 49 mitochondrial genes typical of the Chlorophyceae, including 16 protein-coding genes, 27 transfer RNA genes and six ribosomal RNA genes as well as three introns within cox1 (6832 bp), rnl4 (1805 bp) and cob (1107 bp). We determined that YC001 is a species of Coelastrella on the basis of molecular phylogenetic analyses and microscopic observations. A unique feature of this mitogenome is the presence of three different types of inverted repeats between trnL and trnI and between nad4 and cox1 as well as the presence of orf215, orf755 and one additional copy of the trnM gene, all of which enable a comparison with an available sister taxon, Acutodesmus obliquus.
ACKNOWLEDGEMENTS
We thank Dr Kathy Ann Miller and two reviewers for constructive advice on the manuscript. This research was partially supported by a grant from the Advanced Biomass R&D Center, a Global Frontier Program by the Korean Ministry of Science, ICT & Future Planning (ABC-2010-0029723), to M.M.O. and National Research Foundation of Korea (MEST: 2014R1A2A2A01003588), Korean Rural Development Administration Next-Generation BioGreen21 program (PJ011121) and Marine Biotechnology Program (PJT200620) of the Ministry of Oceans and Fisheries, Korea, to H.S.Y.