Group I-intron trans-splicing and mRNA editing in the mitochondria of placozoan animals

Burger, Gertraud; Yan, Yifei; Javadi, Pasha; Lang, B. Franz

doi:10.1016/j.tig.2009.07.003

Cited by 77 publications

(70 citation statements)

References 22 publications

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“…They have also recently been observed in the genomes of certain animals (Dellaporta et al, 2006; Valles et al, 2008; Burger et al, 2009). Ancient forms of group II introns are believed to have entered the eukaryal lineage from primitive bacteria, during endosymbiont events that led to the major organelle structures (Rest and Mindell, 2003; Koonin, 2006).…”

Section: General Introductionmentioning

confidence: 81%

The tertiary structure of group II introns: implications for biological function and evolution

Pyle

2010

Critical Reviews in Biochemistry and Molecular Biology

114

112

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Group II introns are some of the largest ribozymes in nature, and they are a major source of information about RNA assembly and tertiary structural organization. These introns are of biological significance because they are self-splicing mobile elements that have migrated into diverse genomes and played a major role in the genomic organization and metabolism of most life forms. The tertiary structure of group II introns has been the subject of many phylogenetic, genetic, biochemical and biophysical investigations, all of which are consistent with the recent crystal structure of an intact group IIC intron from the alkaliphilic eubacterium Oceanobacillus iheyensis. The crystal structure reveals that catalytic intron domain V is enfolded within the other intronic domains through an elaborate network of diverse tertiary interactions. Within the folded core, DV adopts an activated conformation that readily binds catalytic metal ions and positions them in a manner appropriate for reaction with nucleic acid targets. The tertiary structure of the group II intron reveals new information on motifs for RNA architectural organization, mechanisms of group II intron catalysis, and the evolutionary relationships among RNA processing systems. Guided by the structure and the wealth of previous genetic and biochemical work, it is now possible to deduce the probable location of DVI and the site of additional domains that contribute to the function of the highly derived group IIB and IIA introns.

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Section: General Introductionmentioning

confidence: 81%

The tertiary structure of group II introns: implications for biological function and evolution

Pyle

2010

Critical Reviews in Biochemistry and Molecular Biology

114

112

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“…Ribosomal DNAs and transfer RNAs were predicted using the RNAmmer 1.2 Server [80], and the ARAGORN program [81]. All introns were identified using the web-based program RNAweasel (http://www.theplantlist.org) [82–86]. …”

Section: Methodsmentioning

confidence: 99%

Parallel evolution of highly conserved plastid genome architecture in red seaweeds and seed plants

et al. 2016

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Background: The red algae (Rhodophyta) diverged from the green algae and plants (Viridiplantae) over one billion years ago within the kingdom Archaeplastida. These photosynthetic lineages provide an ideal model to study plastid genome reduction in deep time. To this end, we assembled a large dataset of the plastid genomes that were available, including 48 from the red algae (17 complete and three partial genomes produced for this analysis) to elucidate the evolutionary history of these organelles. Results: We found extreme conservation of plastid genome architecture in the major lineages of the multicellular Florideophyceae red algae. Only three minor structural types were detected in this group, which are explained by recombination events of the duplicated rDNA operons. A similar high level of structural conservation (although with different gene content) was found in seed plants. Three major plastid genome architectures were identified in representatives of 46 orders of angiosperms and three orders of gymnosperms.

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“…The extended genome size of up to 43kb, the presence of introns, large intergenic regions and several ORFs of unknown function are shared characteristics with known metazoan outgroups like choanoflagellates such as Monosiga brevicollis (Burger et al, 2003) and therefore highlight a basal position of Placozoa at the root of the Metazoa. An unorthodox, fragmented cox1 gene is assembled by trans-splicing involving split group I introns and requires U-to-C editing (Burger et al, 2009). While such features are not uncommon in other eukaryotic kingdoms, they are highly exceptional among Metazoa.…”

Section: Aberrant Genome Structuresmentioning

confidence: 99%

Genetic aspects of mitochondrial genome evolution

Bernt

Braband

Schierwater

et al. 2013

Molecular Phylogenetics and Evolution

227

148

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Group I-intron trans-splicing and mRNA editing in the mitochondria of placozoan animals

Cited by 77 publications

References 22 publications

The tertiary structure of group II introns: implications for biological function and evolution

The tertiary structure of group II introns: implications for biological function and evolution

Parallel evolution of highly conserved plastid genome architecture in red seaweeds and seed plants

Genetic aspects of mitochondrial genome evolution

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