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Mitochondrial Genome of a Japanese Placozoan

机译：日本原生动物的线粒体基因组

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摘要

Placozoans are marine invertebrates found in tropical and subtropical waters. Their body plan is among the simplest of free-living animals. The present study determined the mitochondrial genome sequence of a placozoan collected on the coast of Shirahama, Wakayama, Honshu, Japan, and compared it with those of Trichoplax adhaerens from the Red Sea and of three strains from the Caribbean Sea. The sequences of mitochondrial respiratory chain of the Japanese placozoan genes are very similar to those of the BZ49 strain from the Caribbean Sea. However, there are distinct differences in gene arrangement, such as the location of two open reading frames. This Japanese placozoan is therefore distinguishable from the other strains. Based on current knowledge of placozoan 16S diversity our 'Shirahama' strain most likely represents the H15 lineage, known from the Philippines. In the mitochondrial genome of placozoans, substitution rates are slower than in bilaterians, whereas the rate of rearrangements is faster.
机译：原生动物是在热带和亚热带水域中发现的海洋无脊椎动物。他们的身体计划是最简单的自由生活动物之一。本研究确定了在日本本州和歌山市白rah海岸上收集的一个角斑动物的线粒体基因组序列，并将其与来自红海和来自加勒比海的三种菌株的Trichoplax adhaerens的线粒体基因组序列进行了比较。日本plazozoan基因的线粒体呼吸链的序列与来自加勒比海的BZ49菌株的序列非常相似。但是，基因排列有明显的不同，例如两个开放阅读框的位置。因此，这种日本古生动物有别于其他菌株。根据目前对16Z多样性的了解，我们的“ Shirahama”菌株很可能代表了H15谱系，从菲律宾已知。在placozoans的线粒体基因组中，替代率比在双边生物中慢，而重排率则更快。

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