Baek Ye-Seul, Min Gi-Sik, Kim Sanghee, Choi Han-Gu
a Division of Life Sciences , Korea Polar Research Institute, KIOST , 26 Songdomirae-ro, Yeonsu-gu , Incheon , South Korea and.
b Department of Biological Sciences , Inha University , Incheon , South Korea.
Mitochondrial DNA A DNA Mapp Seq Anal. 2016 May;27(3):1677-8. doi: 10.3109/19401736.2014.958724. Epub 2014 Sep 17.
We present the complete mitochondrial genome of the Antarctic barnacle Lepas australis (Cirripedia, Thoracica, Lepadidae). The genome sequence is 15,502 bp in size. Except for CO1, 12 protein-coding genes (PCGs) start with an ATN initiation codon (ATA, ATG, ATC and ATT). Twelve PCGs were terminated with TAA or TAG stop codon, whereas ND1 possessed an incomplete termination codon (T- -). We compared the mitogenome structure of L. australis to those of other cirripeds and a typical arthropod Homarus americanus. The PCGs in the L. australis mtgenome showed a typical gene arrangement, identical to the arthropod pattern in other cirriped genomes. However, at least 8 tRNA genes were translocated and 2 tRNA genes were inverted in the coding polarity. Unique differences in L. australis mtgenome included translocation of trnS2, trnD and trnI. These results are useful for understanding the phylogenetic relationships among cirripedians, and additional mtgenome information of barnacles including the polar species would allow exploration of the thoracican relationships and mtgenome modifications in the barnacle evolution.
我们展示了南极藤壶澳洲茗荷（蔓足亚纲，围胸目，茗荷科）的完整线粒体基因组。该基因组序列大小为15,502 bp。除CO1外，12个蛋白质编码基因（PCGs）以ATN起始密码子（ATA、ATG、ATC和ATT）开始。12个PCGs以TAA或TAG终止密码子结束，而ND1具有不完整的终止密码子（T--）。我们将澳洲茗荷的线粒体基因组结构与其他蔓足类动物以及典型节肢动物美洲螯龙虾的线粒体基因组结构进行了比较。澳洲茗荷线粒体基因组中的PCGs呈现出典型的基因排列，与其他蔓足类动物基因组中的节肢动物模式相同。然而，至少有8个tRNA基因发生了易位，2个tRNA基因的编码极性发生了反转。澳洲茗荷线粒体基因组的独特差异包括trnS2、trnD和trnI的易位。这些结果有助于理解蔓足类动物之间的系统发育关系，而包括极地物种在内的藤壶的更多线粒体基因组信息将有助于探索围胸目动物之间的关系以及藤壶进化中线粒体基因组的变化。
