Results 41 to 50 of about 838,914 (323)

Circularization pathway of a bacterial group II intron. [PDF]

open access: yesNucleic Acids Res, 2016
Group II introns are large RNA enzymes that can excise as lariats, circles or in a linear form through branching, circularization or hydrolysis, respectively. Branching is by far the main and most studied splicing pathway while circularization was mostly overlooked. We previously showed that removal of the branch point A residue from Ll.LtrB, the group
Monat C, Cousineau B.
europepmc   +5 more sources

Did group II intron proliferation in an endosymbiont-bearing archaeon create eukaryotes? [PDF]

open access: goldBiology Direct, 2006
Martin & Koonin recently proposed that the eukaryote nucleus evolved as a quality control mechanism to prevent ribosome readthrough into introns. In their scenario, the bacterial ancestor of mitochondria was resident in an archaeal cell, and group II ...
Poole Anthony M
doaj   +2 more sources

Analysis of the Roles of the Arabidopsis nMAT2 and PMH2 Proteins Provided with New Insights into the Regulation of Group II Intron Splicing in Land-Plant Mitochondria. [PDF]

open access: yesInt J Mol Sci, 2017
Plant mitochondria are remarkable with respect to the presence of numerous group II introns which reside in many essential genes. The removal of the organellar introns from the coding genes they interrupt is essential for respiratory functions, and is ...
Zmudjak M   +4 more
europepmc   +2 more sources

Group II Introns: Highly Structured yet Dynamic

open access: yesCHIMIA, 2023
RNA splicing, the removal of introns and ligation of exons, is a crucial process during mRNA maturation. Group II introns are large ribozymes that self-catalyze their splicing, as well as their transposition.
Esra Ahunbay   +2 more
doaj   +3 more sources

Identification of a family of group II introns encoding LAGLIDADG ORFs typical of group I introns [PDF]

open access: bronzeRNA, 2002
Group I and group II introns are unrelated classes of introns that each encode proteins that facilitate intron splicing and intron mobility. Here we describe a new subfamily of nine introns in fungi that are group II introns but encode LAGLIDADG ORFs typical of group I introns. The introns have fairly standard group IIB1 RNA structures and are inserted
Navtej Toor, Steven Zimmerly
openalex   +4 more sources

Cryo-EM Structures of a Group II Intron Reverse Splicing into DNA. [PDF]

open access: yesCell, 2019
Haack DB   +6 more
europepmc   +2 more sources

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