Seo Jung Soo, Eom Hey-Jin, Cho Jae-Kwon, Kang Hyun-Sil, Rhee Jae-Sung
Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science, Tongyeong, South Korea.
Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon, South Korea.
Mitochondrial DNA B Resour. 2021 Mar 19;6(3):1082-1084. doi: 10.1080/23802359.2021.1899869.
Here, we present the whole mitochondrial genome of commensal hydroid McCrady 1859 (family Eirinidae); this is the first specimen of the family to have its mitogenome sequenced. The linear mitogenome is 15,315 bp in length and consists of 13 protein-coding genes (PCGs), large and small ribosomal subunits (rRNA), methionine and tryptophan transfer RNA () genes (trnM and trnW), and a partial copy of cytochrome oxidase subunit I () pseudogene, as is typical for the class Hydrozoa. Nucleotide sequences of two genes at two ends of the linear mitogenome form a part of inverted terminal repeat. The overall genomic structure and gene arrangement of 13 PCGs were identical to the reported mitochondrial genomes of hydrozoans, except for the positions of two genes. Phylogenetic analysis of 13 PCGs and other cnidarians recovers a closest relationship with the derived cluster of two hydrozoans, and within Leptothecata.
在此，我们展示了共生水螅麦氏1859（艾氏水螅科）的完整线粒体基因组；这是该科首个线粒体基因组被测序的标本。线性线粒体基因组长度为15315 bp，由13个蛋白质编码基因（PCGs）、大、小核糖体亚基（rRNA）、甲硫氨酸和色氨酸转运RNA（trnM和trnW）基因以及细胞色素氧化酶亚基I（cox1）假基因的部分拷贝组成，这是水螅纲的典型特征。线性线粒体基因组两端的两个基因的核苷酸序列形成了反向末端重复的一部分。13个PCGs的总体基因组结构和基因排列与已报道的水螅纲线粒体基因组相同，除了两个cox1基因的位置。对13个PCGs和其他刺胞动物进行的系统发育分析表明，它与两个水螅纲动物（属于软水母亚纲）的衍生类群关系最为密切。
