New features of Asian Crassostrea oyster mitochondrial genomes: A novel alloacceptor tRNA gene recruitment and two novel ORFs
Wu, XY; Li, XL; Li, L; Xu, XD; Xia, JJ; Yu, ZN; carlzyu@scsio.ac.cn
2012
发表期刊GENE
ISSN0378-1119
卷号507期号:2页码:112-118
摘要A feasible way to perform evolutionary analyses is to compare characters divergent enough to observe significant differences, but sufficiently similar to exclude saturation of the differences that occurred. Thus, comparisons of invertebrate mitochondrial (mt) genomes at low taxonomic levels can be extremely helpful in investigating patterns of variation and evolutionary dynamics of genomes, as intermediate stages of the process may be identified. Fortunately, in this study, we newly sequenced the mt genome of the eighth member of Asian Crassostrea oysters which can provide necessary intermediate characters for us to believe that the variation of Crassostrea mt genomes is considerably greater than previously acknowledged. Several new features of Asian Crassostrea oyster mitochondrial genomes were revealed, and our results are particularly significant as they 1) suggest a novel model of alloacceptor tRNA gene recruitment, namely "vertical" tRNA gene recruitment, which can be successfully used to explain the origination of the unusually additional trnK and trnQ genes (annotated as trnK(2) and trnQ(2) respectively) in the mt genomes of the five Asian oysters, and we speculate that this recruitment progress may be a common phenomenon in the evolution of the tRNA multigene family; 2) reveal the existence of two additional, lineage-specific, mtDNA-encoded genes that may originate from duplication of nad2 followed by rapid evolutionary change. Each of these two genes encodes a unique amino terminal signal peptide, thus each might possess an unknown function; and 3) identify for the first time the atp8 gene in oysters. The present study thus gives further credence to the comparison of congeneric bivalves as a meaningful strategy to investigate mt genomic evolutionary trends in genome organization, tRNA multigene family, and gene loss and/or duplication that are difficult to undertake at higher taxonomic levels. In particular, our study provides new evidence for the identification and characterization of ORFs in the "non-coding region" of animal mt genomes. (c) 2012 Elsevier B.V. All rights reserved.
部门归属[Wu, Xiangyun; Li, Xiaoling; Li, Lu; Xu, Xiaodong; Xia, Jianjun; Yu, Ziniu] Chinese Acad Sci, Key Lab Marine Bioresource Sustainable Utilizat, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Li, Xiaoling; Xu, Xiaodong] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
关键词Crassostrea Mitochondrial Genome Trna Gene Recruitment Oyster Atp8
学科领域Genetics & Heredity
语种英语
资助项目LMB
WOS记录号WOS:000308515000003
引用统计
被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/9766
专题中科院海洋生物资源可持续利用重点实验室
通讯作者carlzyu@scsio.ac.cn
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Wu, XY,Li, XL,Li, L,et al. New features of Asian Crassostrea oyster mitochondrial genomes: A novel alloacceptor tRNA gene recruitment and two novel ORFs[J]. GENE,2012,507(2):112-118.
APA Wu, XY.,Li, XL.,Li, L.,Xu, XD.,Xia, JJ.,...&carlzyu@scsio.ac.cn.(2012).New features of Asian Crassostrea oyster mitochondrial genomes: A novel alloacceptor tRNA gene recruitment and two novel ORFs.GENE,507(2),112-118.
MLA Wu, XY,et al."New features of Asian Crassostrea oyster mitochondrial genomes: A novel alloacceptor tRNA gene recruitment and two novel ORFs".GENE 507.2(2012):112-118.
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