Both Conifer II and Gnetales are characterized by a high frequency of ancient mitochondrial gene transfer to the nuclear genome

doi:10.1186/s12915-021-01096-z

	Both Conifer II and Gnetales are characterized by a high frequency of ancient mitochondrial gene transfer to the nuclear genome
	Kan, Sheng-Long ; Shen, Ting-Ting ; Ran, Jin-Hua ; Wang, Xiao-Quan
	2021
发表期刊	BMC BIOLOGY
卷号	19 期号:1
摘要	Background Mitochondrial gene transfer/loss is common in land plants, and therefore the fate of missing mitochondrial genes has attracted more and more attention. The gene content of gymnosperm mitochondria varies greatly, supplying a system for studying the evolutionary fate of missing mitochondrial genes. Results Here, we studied the tempo and pattern of mitochondrial gene transfer/loss in gymnosperms represented by all 13 families, using high-throughput sequencing of both DNA and cDNA. All 41 mitochondrial protein-coding genes were found in cycads, Ginkgo and Pinaceae, whereas multiple mitochondrial genes were absent in Conifer II and Gnetales. In Conifer II, gene transfer from mitochondria to the nucleus followed by loss of the mitochondrial copy was common, but complete loss of a gene in both mitochondrial and nuclear genomes was rare. In contrast, both gene transfer and loss were commonly found in Gnetales. Notably, in Conifer II and Gnetales, the same five mitochondrial genes were transferred to the nuclear genome, and these gene transfer events occurred, respectively, in ancestors of the two lineages. A two-step transfer mechanism (retroprocessing and subsequent DNA-mediated gene transfer) may be responsible for mitochondrial gene transfer in Conifer II and Gnetales. Moreover, the mitochondrial gene content variation is correlated with gene length, GC content, hydrophobicity, and nucleotide substitution rates in land plants. Conclusions This study reveals a complete evolutionary scenario for variations of mitochondrial gene transferring in gymnosperms, and the factors responsible for mitochondrial gene content variation in land plants.
关键词	Mitochondrial gene transfer Gene content variation Evolutionary fate Gymnosperm Conifer II Gnetales
学科领域	Biology
DOI	10.1186/s12915-021-01096-z
收录类别	SCI
语种	英语
WOS关键词	ARABIDOPSIS-THALIANA ; PROTEIN GENE ; EVOLUTION ; SEQUENCE ; DNA ; MITOGENOME ; ORGANELLES ; INTRON ; ORIGIN ; PLANTS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000680416300001
出版者	BMC
文献子类	Article
出版地	LONDON
EISSN	1741-7007
资助机构	Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SMC027] ; National Key R&D Program of China [2017YFA0605100] ; National Natural Science Foundation of China [31370250, 31770238] ; Youth Innovation Promotion Association, Chinese Academy of Sciences [2012070]
作者邮箱	jinhua_ran@ibcas.ac.cn ; xiaoq_wang@ibcas.ac.cn
作品OA属性	Green Published, gold
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26705
专题	系统与进化植物学国家重点实验室
作者单位	1.[Kan, Sheng-Long 2.Ran, Jin-Hua 3.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.East China Univ Technol, Sch Earth Sci, Nanchang 330013, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Kan, Sheng-Long,Shen, Ting-Ting,Ran, Jin-Hua,et al. Both Conifer II and Gnetales are characterized by a high frequency of ancient mitochondrial gene transfer to the nuclear genome[J]. BMC BIOLOGY,2021,19(1).
APA	Kan, Sheng-Long,Shen, Ting-Ting,Ran, Jin-Hua,&Wang, Xiao-Quan.(2021).Both Conifer II and Gnetales are characterized by a high frequency of ancient mitochondrial gene transfer to the nuclear genome.BMC BIOLOGY,19(1).
MLA	Kan, Sheng-Long,et al."Both Conifer II and Gnetales are characterized by a high frequency of ancient mitochondrial gene transfer to the nuclear genome".BMC BIOLOGY 19.1(2021).

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