Characterization and phylogenetic analysis of the complete mitochondrial genome of a tropical sea cucumber, Holothuria fuscocinerea

Abstract

In this study, the mitochondrial genome (mitogenome) of Holothuria fuscocinerea was unraveled to be 15,890 bp in length, containing 13 protein-coding genes (PCGs), 22 tRNA genes, and 2 rRNA genes. The PCGs were initiated by four initiation codons (ATG, TAC, ATC, and ATA). Only one PCG (nad6) and five tRNA genes (tRNA^Ser(UCN), tRNA^Gln, tRNA^Ala, tRNA^Val, and tRNA^Asp) were encoded on the light chain, and the other genes were encoded on the heavy chain. A phylogenetic tree constructed with 16S rRNA sequences showed that H. fuscocinerea is most closely related to H. leucospilota.

Keywords:

• Mitochondrial genome
• Holothuria fuscocinerea
• Phylogenetic analysis
• 16S rRNA

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data that support the findings of this study are openly available in GenBank at https://www.ncbi.nlm.nih.gov/genbank/, reference number MK391177.

Additional information

Funding

This study was supported by the National Key R & D Program of China [2018YFD0901605], the Strategic Priority Research Program of the Chinese Academy of Sciences [XDA13020205], The National Natural Science Foundation of China [41676162], the Guangdong Province Program [2018A030313857, 2017B030314052, 2015A030310120], Guangdong Basic and Applied Basic Research Foundation [2020A1515011115], and the Science & Technology Promoting Projects for Oceanic & Fishery in Guangdong Province [SDYY-2018-01].