Phylogeny and evolution of chloroplast tRNAs in Adoxaceae

doi:10.1002/ece3.7133

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	Phylogeny and evolution of chloroplast tRNAs in Adoxaceae
	Zhong,Qiu-Yi ; Fu,Xiao-Gang ; Zhang,Ting-Ting ; Zhou,Tong ; Yue,Ming ; Liu,Jian-Ni ; Li,Zhong-Hu
	2021
发表期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
卷号	11 期号:3 页码:1294-1309
摘要	Chloroplasts are semiautonomous organelles found in photosynthetic plants. The major functions of chloroplasts include photosynthesis and carbon fixation, which are mainly regulated by its circular genomes. In the highly conserved chloroplast genome, the chloroplast transfer RNA genes (cp tRNA) play important roles in protein translation within chloroplasts. However, the evolution of cp tRNAs remains unclear. Thus, in the present study, we investigated the evolutionary characteristics of chloroplast tRNAs in five Adoxaceae species using 185 tRNA gene sequences. In total, 37 tRNAs encoding 28 anticodons are found in the chloroplast genome in Adoxaceae species. Some consensus sequences are found within the psi-stem and anticodon loop of the tRNAs. Some putative novel structures were also identified, including a new stem located in the variable region of tRNA(Tyr) in a similar manner to the anticodon stem. Furthermore, phylogenetic and evolutionary analyses indicated that synonymous tRNAs may have evolved from multiple ancestors and frequent tRNA duplications during the evolutionary process may have been primarily caused by positive selection and adaptive evolution. The transition and transversion rates are uneven among different tRNA isotypes. For all tRNAs, the transition rate is greater with a transition/transversion bias of 3.13. Phylogenetic analysis of cp tRNA suggested that the type I introns in different taxa (including eukaryote organisms and cyanobacteria) share the conserved sequences U-U-x2-C and U-x-G-x2-T, thereby indicating the diverse cyanobacterial origins of organelles. This detailed study of cp tRNAs in Adoxaceae may facilitate further investigations of the evolution, phylogeny, structure, and related functions of chloroplast tRNAs.
关键词	anticodon chloroplast tRNA intron phylogeny transition transversion NONOPTIMAL CODON USAGE HORIZONTAL TRANSFER GENE DUPLICATION GENOME MITOCHONDRIAL ORIGIN TRANSLATION SEQUENCES ACID DNA
DOI	10.1002/ece3.7133
WOS记录号	WOS:000605019800001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73489
专题	中国科学院昆明植物研究所
作者单位	1.[Zhong, Qiu-Yi 2.Fu, Xiao-Gang 3.Zhang, Ting-Ting 4.Zhou, Tong 5.Yue, Ming 6.Northwest Univ, Coll Life Sci, Shaanxi Key Lab Anim Conservat,Minist Educ, Key Lab Resource Biol & Biotechnol Western China, Xian 710069, Peoples R China 7.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China 8.Northwest Univ, Early Life Inst, Dept Geol, State Key Lab Continental Dynam, Xian, Peoples R China
推荐引用方式 GB/T 7714	Zhong,Qiu-Yi,Fu,Xiao-Gang,Zhang,Ting-Ting,et al. Phylogeny and evolution of chloroplast tRNAs in Adoxaceae[J]. ECOLOGY AND EVOLUTION,2021,11(3):1294-1309.
APA	Zhong,Qiu-Yi.,Fu,Xiao-Gang.,Zhang,Ting-Ting.,Zhou,Tong.,Yue,Ming.,...&Li,Zhong-Hu.(2021).Phylogeny and evolution of chloroplast tRNAs in Adoxaceae.ECOLOGY AND EVOLUTION,11(3),1294-1309.
MLA	Zhong,Qiu-Yi,et al."Phylogeny and evolution of chloroplast tRNAs in Adoxaceae".ECOLOGY AND EVOLUTION 11.3(2021):1294-1309.

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