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题名: Contradiction between Plastid Gene Transcription and Function Due to Complex Posttranscriptional Splicing: An Exemplary Study of ycf15 Function and Evolution in Angiosperms
作者: Shi, Chao1, 2, 3; null(刘源)2, 3; Huang, Hui2; En-Hua Xia(夏恩华)2, 3; Zhang, Hai-Bin2, 3; null(高立志)2
刊名: PLOS ONE
关键词: CHLOROPLAST GENOME SEQUENCE ; COMPLETE NUCLEOTIDE-SEQUENCE ; INDEPENDENT TRANSFERS ; HORIZONTAL TRANSFER ; MAXIMUM-LIKELIHOOD ; FLOWERING PLANTS ; RNA-METABOLISM ; NUCLEUS ; DNA ; ORGANIZATION
英文摘要: Plant chloroplast genes are usually co-transcribed while its posttranscriptional splicing is fairly complex and remains largely unsolved. On basis of sequencing the three complete Camellia (Theaceae) chloroplast genomes for the first time, we comprehensively analyzed the evolutionary patterns of ycf15, a plastid gene quite paradoxical in terms of its function and evolution, along the inferred angiosperm phylogeny. Although many species in separate lineages including the three species reported here contained an intact ycf15 gene in their chloroplast genomes, the phylogenetic mixture of both intact and obviously disabled ycf15 genes imply that they are all non-functional. Both intracellular gene transfer (IGT) and horizontal gene transfer (HGT) failed to explain such distributional anomalies. While, transcriptome analyses revealed that ycf15 was transcribed as precursor polycistronic transcript which contained ycf2, ycf15 and antisense trnL-CAA. The transcriptome assembly was surprisingly found to cover near the complete Camellia chloroplast genome. Many non-coding regions including pseudogenes were mapped by multiple transcripts, indicating the generality of pseudogene transcriptions. Our results suggest that plastid DNA posttranscriptional splicing may involve complex cleavage of nonfunctional genes.
出版日期: 2013-03-18
卷号: 8, 期号:3, 页码:e59620
语种: 英语
收录类别: SCI
学科分类: Science & Technology - Other Topics
ISSN号: 1932-6203
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/16493
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species Southwest China, Plant Germplasm & Genom Ctr, Kunming, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China

Recommended Citation:
Shi, Chao; Liu, Yuan; Huang, Hui; Xia, En-Hua; Zhang, Hai-Bin; Gao, Li-Zhi.Contradiction between Plastid Gene Transcription and Function Due to Complex Posttranscriptional Splicing: An Exemplary Study of ycf15 Function and Evolution in Angiosperms,PLOS ONE,2013,8(3):e59620
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