Many parallel losses of infA from chloroplast DNA during angiosperm evolution with multiple independent transfers to the nucleus.
Ronny S. Millen,Richard G. Olmstead,Keith L. Adams,Jeffrey D. Palmer,Nga T. Lao,Laura Heggie,Tony A. Kavanagh,Julian M. Hibberd,John C. Gray,Clifford W. Morden,Patrick J. Calie,Lars S. Jermiin,Kenneth H. Wolfe,Kenneth H. Wolfe +13 more
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TLDR
Phylogenetic analysis of infA sequences and assessment of transit peptide homology indicate that the four nuclear infA genes are probably derived from four independent gene transfers from chloroplast to nuclear DNA during angiosperm evolution.Abstract:
We used DNA sequencing and gel blot surveys to assess the integrity of the chloroplast gene infA , which codes for translation initiation factor 1, in . 300 diverse angiosperms. Whereas most angiosperms appear to contain an intact chloroplast infA gene, the gene has repeatedly become defunct in z 24 separate lineages of angiosperms, including almost all rosid species. In four species in which chloroplast infA is defunct, transferred and expressed copies of the gene were found in the nucleus, complete with putative chloroplast transit peptide sequences. The transit peptide sequences of the nuclear infA genes from soybean and Arabidopsis were shown to be functional by their ability to target green fluorescent protein to chloroplasts in vivo. Phylogenetic analysis of infA sequences and assessment of transit peptide homology indicate that the four nuclear infA genes are probably derived from four independent gene transfers from chloroplast to nuclear DNA during angiosperm evolution. Considering this and the many separate losses of infA from chloroplast DNA, the gene has probably been transferred many more times, making infA by far the most mobile chloroplast gene known in plants.read more
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Endosymbiotic Gene Transfer: Organelle Genomes Forge Eukaryotic Chromosomes
TL;DR: Genome sequences reveal that a deluge of DNA from organelle DNA has constantly been bombarding the nucleus since the origin of organelles, abolished organelle autonomy and increased nuclear complexity.
Journal ArticleDOI
Horizontal gene transfer in eukaryotic evolution
TL;DR: The number of well-supported cases of transfer from both prokaryotes and eukaryotes, many with significant functional implications, is now expanding rapidly and major recent trends include the important role of HGT in adaptation to certain specialized niches and the highly variable impact of H GT in different lineages.
Journal ArticleDOI
Evolutionary analysis of Arabidopsis, cyanobacterial, and chloroplast genomes reveals plastid phylogeny and thousands of cyanobacterial genes in the nucleus.
William Martin,Tamas Rujan,Erik Richly,Andrea Hansen,Sabine Cornelsen,Thomas Lins,Dario Leister,Bettina Stoebe,Masami Hasegawa,David Penny +9 more
TL;DR: A phylogeny of chloroplast genomes inferred from 41 proteins and 8,303 amino acids sites indicates that at least two independent secondary endosymbiotic events have occurred involving red algae and that amino acid composition bias in chloropleft proteins strongly affects plastid genome phylogeny.
Journal ArticleDOI
Analysis of 81 genes from 64 plastid genomes resolves relationships in angiosperms and identifies genome-scale evolutionary patterns.
Robert K. Jansen,Zhengqiu Cai,Linda A. Raubeson,Henry Daniell,Claude W. dePamphilis,Jim Leebens-Mack,Kai F. Müller,Mary Guisinger-Bellian,Rosemarie C. Haberle,Anne K. Hansen,Timothy W. Chumley,Seung Bum Lee,Rhiannon M. Peery,Joel R. McNeal,Jennifer V. Kuehl,Jeffrey L. Boore,Jeffrey L. Boore +16 more
TL;DR: Phylogenetic trees from multiple methods provide strong support for the position of Amborella as the earliest diverging lineage of flowering plants, followed by Nymphaeales and Austrobaileyales, and the plastid genome trees also provide strongSupport for a sister relationship between eudicots and monocots, and this group is sister to a clade that includes Chloranthales and magnoliids.
Journal ArticleDOI
The evolution of the plastid chromosome in land plants: gene content, gene order, gene function.
Susann Wicke,Susann Wicke,Gerald M. Schneeweiss,Claude W. dePamphilis,Kai F. Müller,Dietmar Quandt +5 more
TL;DR: This review bridges functional and evolutionary aspects of plastid chromosome architecture in land plants and their putative ancestors and suggests that the slow mode at which the plastome typically evolves is likely to be influenced by a combination of different molecular mechanisms.
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