Complete mitochondrial DNA sequence of a Conoidean gastropod, Lophiotoma (Xenuroturris) cerithiformis:: Gene order and gastropod phylogeny
Complete mitochondrial DNA sequence of a Conoidean gastropod, Lophiotoma (Xenuroturris) cerithiformis:: Gene order and gastropod phylogeny
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DOI：
10.1016/j.toxicon.2006.04.013
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发表时间：
2006-07-01
期刊：
影响因子：
2.8
通讯作者：
Wolstenholme, David R.
中科院分区：
文献类型：
--
作者：
Bandyopadhyay, Pradip K.;Stevenson, Bradford J.;Wolstenholme, David R.
我们已经确定了第一个完整的核苷酸序列的有毒软体动物，芋螺纲腹足类，Lophiotoma（Xenuroturris）cerithiforniis的线粒体基因组。它有15，380个核苷酸对（ntp），编码13种蛋白质，两种核糖体RNA和22种tRNA的蛋白质合成系统。蛋白质mRNA、核糖体RNA和13种tRNA从同一条链转录，其余的tRNA从另一条链转录。未分配序列的最长片段是139 ntp，并且包括82 ntp片段，其是由8 nt分隔的37 ntp的完美反向重复序列。L. cerithiformis的mtDNA序列与黄腹鲍、多板动物Katharina tunicata和头足动物Octopus vulgaris的mtDNA序列具有显著的相似性，但与肺形动物和后鳃腹足动物的mtDNA序列以及双壳类和舟足类的mtDNA序列有显著的差异。一个单一的16基因倒位，区分L。cerithiformis的mtDNA。rubra、被囊K. tunicata和O. vulgaris的mtDNA与石纹滨螺（Littorina saxitalis）的mtDNA相同，提示石纹滨螺与石纹滨螺的亲缘关系较近。(c)2006爱思唯尔有限公司保留所有权利。
We have determined the first complete nucleotide sequence of the mitochondrial genome of a venomous mollusc, the Conoidean gastropod, Lophiotoma (Xenuroturris) cerithiforniis. It is 15,380 nucleotide pairs (ntp) and encodes 13 proteins, two ribosomal RNAs and 22 tRNAs of the mitochondrion's own protein synthesizing system. The protein mRNAs, ribosomal RNAs and 13 of the tRNAs are transcribed from the same strand, the remaining tRNAs from the other strand. The longest segment of unassigned sequence is 139 ntp and includes a 82 ntp segment that is a perfect inverted repeat sequence of 37 ntp separated by 8 nt. The gene arrangement of L. cerithiformis mtDNA shows remarkable similarity to the gene arrangements of mtDNAs of the vetigastropod Haliotis rubra, the polyplacophoran Katharina tunicata and the cephalopod Octopus vulgaris, but differs dramatically from the gene arrangements found in the mtDNAs of pulmonate and opisthobranch gastropods, as well as mtDNAs of bivalves and scaphopods. A single sixteen gene inversion that distinguishes L. cerithiformis mtDNA from mtDNAs of H. rubra, K tunicata and O. vulgaris is shared by mtDNA of a littorinomorph gastropod Littorina saxitalis, suggesting a close relationship of conoidean and littorinomorph gastropods. (c) 2006 Elsevier Ltd. All rights reserved.