Results 31 to 40 of about 364,363 (199)
BMC Ecology and Evolution, 2023 Group II introns are common in the two endosymbiotic organelle genomes of the plant lineage. Chloroplasts harbor 22 positionally conserved group II introns whereas their occurrence in land plant (embryophyte) mitogenomes is highly variable and specific ...
Simon Zumkeller, Volker Knoop
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Excision of Group II Introns as Circles [PDF]
Molecular Cell, 2001 Group II introns are usually removed from precursor RNAs as lariats comprised of a circular component and a short 3' tail. We find that group II introns can also be excised as complete circles. Circle formation requires release of the 3' exon of a splicing substrate, apparently by a trans splicing mechanism.
Vincent W. Coljee +6 more
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Unraveling the role of the enigmatic MatK maturase in chloroplast group IIA intron excision
Plant Direct, 2020 Maturases are prokaryotic enzymes that aid self‐excision of introns in precursor RNAs and have evolutionary ties to the nuclear spliceosome. Both the mitochondria and chloroplast, due to their prokaryotic origin, encode a single intron maturase, MatR for
Michelle M. Barthet +2 more
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Host Factors Influencing the Retrohoming Pathway of Group II Intron RmInt1, Which Has an Intron-Encoded Protein Naturally Devoid of Endonuclease Activity. [PDF]
PLoS ONE, 2016 Bacterial group II introns are self-splicing catalytic RNAs and mobile retroelements that have an open reading frame encoding an intron-encoded protein (IEP) with reverse transcriptase (RT) and RNA splicing or maturase activity.
Rafael Nisa-Martínez +2 more
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Rapid Targeted Gene Disruption in Bacillus Anthracis [PDF]
, 2013 Anthrax is a zoonotic disease recognized to affect herbivores since Biblical times and has the widest range of susceptible host species of any known pathogen.
Ellington, Andrew +9 more
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Bacterial group II introns generate genetic diversity by circularization and trans-splicing from a population of intron-invaded mRNAs. [PDF]
PLoS Genetics, 2018 Group II introns are ancient retroelements that significantly shaped the origin and evolution of contemporary eukaryotic genomes. These self-splicing ribozymes share a common ancestor with the telomerase enzyme, the spliceosome machinery as well as the ...
Félix LaRoche-Johnston +3 more
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Updated Progress on Group II Intron Splicing Factors in Plant Chloroplasts
Current Issues in Molecular Biology, 2022 Group II introns are large catalytic RNAs (ribozymes) in the bacteria and organelle genomes of several lower eukaryotes. Many critical photosynthesis-related genes in the plant chloroplast genome also contain group II introns, and their splicing is ...
Chu Zeng +3 more
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The trouble with (group II) introns [PDF]
Proceedings of the National Academy of Sciences, 2014 Qu et al. provide new grist for the introns origin mill (1), adding one more chapter to what has become a very long narrative. Back in the day when spliceosomal introns in the protein-coding genes of eukaryotes were still very new to science (1977–1978), some of us argued that—in an evolutionary sense—they were actually very old (2, 3).
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PLoS ONE, 2020 Bacterial group II introns mostly behave as versatile retromobile genetic elements going through distinct cycles of gain and loss. These large RNA molecules are also ribozymes splicing autocatalytically from their interrupted pre-mRNA transcripts by two ...
Caroline Monat, Benoit Cousineau
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Elimination of a group II intron from a plastid gene causes a mutant phenotype [PDF]
, 2011 Group II introns are found in bacteria and cell organelles (plastids, mitochondria) and are thought to represent the evolutionary ancestors of spliceosomal introns.
Belfort +33 more
core +2 more sources