Abstract
In the present study, mitochondrial DNA sequences of the Yeso Sika deer (Cervus nippon yesoensis) were studied. Specifically, protein-coding genes as mitochondrial NADH dehydrogenase subunits (ND1, ND2, ND3, ND4L, ND4, ND5 and ND6), cytochrome c oxidase subunits (CO I and CO III), ATP synthase subunits (ATPase8 and ATPase6) and cytochrome b. Also, phylogenetic analyses on eight mammalian species were performed, including the Muntjac deer (Muntiacus reevesi). The rate of amino-acid substitution was lowest (3.74%) between Yeso Sika deer and Muntjac deer, and the values between Yeso Sika deer and other species (sheep, cattle, horse, pig, mouse, human and chimpanzee) were 6.63%, 7.30%, 12.55%, 13.03%, 23.59%, 24.82% and 25.04%, respectively. Among them, the highest value of divergence was recognized in ATPase8, and the second structure of ATPase8 showed a difference between the Yeso Sika deer and Muntjac deer as a result of the substitution of 34HisTyr and 49ThrIle. In addition, we identified a substitution of an amino-acid sequence (19ThrAla) between the Yeso Sika deer and Yakushima Sika deer (C. n. yakushimae). From these results, ATPase8 was also a variable region in Cervidae.
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