Zhang Chi, Zhang Kun, Peng Ying, Zhou Jianshe, Liu Yifan, Liu Bingjian
Institute of Fisheries Science, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, China.
National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization, Zhejiang Ocean University, Zhoushan, China.
Front Genet. 2022 Jun 8;13:922634. doi: 10.3389/fgene.2022.922634. eCollection 2022.
Complete mitochondrial genomes (mitogenomes) can provide valuable information for phylogenetic relationships, gene rearrangement, and molecular evolution. Here, we report the mitochondrial whole genomes of three species and explore the mechanisms of rearrangements that occur in their mitochondrial genomes. The lengths of the mitogenomes' sequences of , , and were 16,876, 16,861, and 16,835, respectively. They contained 13 protein-coding genes, two ribosomal RNAs, 22 transfer RNA genes, and two identical control regions (CRs). The mitochondrial genomes of three species were rearranged compared to other fish mitochondrial genomes. The , and CR () genes undergo replication followed by random loss of the and genes to form tRNA-Thr, CR1, tRNA-Pro and CR2 (). Tandem duplication and random loss best explain this mitochondrial gene rearrangement. These results provide a foundation for future characterization of the mitochondrial gene arrangement of and further phylogenetic studies.
完整的线粒体基因组（线粒体基因组）可以为系统发育关系、基因重排和分子进化提供有价值的信息。在此，我们报告了三个物种的线粒体全基因组，并探讨了其线粒体基因组中发生重排的机制。、和的线粒体基因组序列长度分别为16,876、16,861和16,835。它们包含13个蛋白质编码基因、两个核糖体RNA、22个转运RNA基因和两个相同的控制区（CRs）。与其他鱼类线粒体基因组相比，三个物种的线粒体基因组发生了重排。、和CR（）基因进行复制，随后和基因随机丢失，形成tRNA-苏氨酸、CR1、tRNA-脯氨酸和CR2（）。串联重复和随机丢失最能解释这种线粒体基因重排。这些结果为未来和线粒体基因排列的表征以及进一步的系统发育研究奠定了基础。
