Complete mitochondrial genome of a Chinese scorpion Mesobuthus martensii (Chelicerata, Scorpiones, Buthidae).

DNA sequence : the journal of DNA sequencing and mapping Pub Date : 2007-12-01 DOI:10.1080/10425170701289883

Eun Hwa Choi, Shin Ju Park, Keum Hee Jang, Wook Hwang

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引用次数: 20

Abstract

The complete mitochondrial genome (15,034 bp) of a Chinese scorpion Mesobuthus martensii (Buthidae) was sequenced and characterized in detail. The genome contains 13 protein-coding genes, 21 transfer RNA genes, two ribosomal RNA genes and a large non-coding region ( = CR). Its gene arrangement pattern is identical to that of Limulus polyphemus (Chelicerata, Xiphosura), with the exceptions of the tRNA(Glu)-tRNA(Ile)-tRNA(Met) (Q-I-M) arrangement and tRNA(Asp)-loss. Additional interesting features are found and discussed: high frequency of Leu(UUG) codon use, low A+T content of the genome (66.75%), and six repeat units (five 60-nt-long and one 58-nt-long repeats) in the 998-nt CR. Bayesian analysis based on amino acid sequences of the 12 proteincoding genes (excluding ATP8) reveals that the family Buthidae (Order Scorpiones) and the class Arachnida form strong monophyletic groups within Chelicerata, respectively. It indicated that the scorpions are the most ancestral arachnids.

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马氏中蝎(螯角目，蝎科，蝎科)线粒体全基因组的研究。

对中国中华蝎马氏中华蝎线粒体全基因组(15034 bp)进行了测序和分析。基因组包含13个蛋白质编码基因、21个转移RNA基因、2个核糖体RNA基因和一个大的非编码区(= CR)。除tRNA(Glu)-tRNA(Ile)-tRNA(Met) (Q-I-M)排列和tRNA(Asp)-loss外，其基因排列模式与limus polyphemus (Chelicerata, Xiphosura)相同。研究还发现并讨论了其他有趣的特征:Leu(UUG)密码子使用频率高，基因组A+T含量低(66.75%)，998-nt CR中有6个重复单元(5个60-nt长和1个58-nt长重复)。基于12个蛋白质编码基因(不包括ATP8)的氨基酸序列的贝叶斯分析表明，Buthidae科(天蝎目)和Arachnida类在Chelicerata中分别形成了强的单系类群。这表明蝎子是最古老的蛛形纲动物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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DNA sequence : the journal of DNA sequencing and mapping

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