Results 281 to 290 of about 775,451 (311)

Group II and group III introns of twintrons: potential relationships with nuclear pre-mRNA introns

Trends in Biochemical Sciences, 1993
Two new and important features of introns have emerged from analysis of the Euglena gracilis chloroplast genome. One is a new class of introns, designated group III, that may be the closest contemporaries to nuclear pre-mRNA introns. The second is introns that are interrupted by other introns termed twintrons.
Richard B. Hallick, Donald W. Copertino
openaire   +3 more sources

Group II introns: versatile ribozymes and retroelements

WIREs RNA, 2016
Group II introns are catalytic RNAs (ribozymes) and retroelements found in the genomes of bacteria, archaebacteria, and organelles of some eukaryotes. The prototypical retroelement form consists of a structurally conserved RNA and a multidomain reverse transcriptase protein, which interact with each other to mediate splicing and mobility reactions.
Steven Zimmerly, Cameron Semper, Bonnie A. McNeil   +2 more
openaire   +3 more sources

OsPPR11 encoding P-type PPR protein that affects group II intron splicing and chloroplast development

Plant Cell Reports, 2022
Qiang Zhang, Changzhao Chen, Yaliang Wang, Mengxing He, Zhiwen Li, Lan Shen, Qing Li, Li Zhu, Deyong Ren, Jiang Hu, Zhenyu Gao, Guangheng Zhang, Q. Qian   +12 more
semanticscholar   +1 more source

[8] Reactions catalyzed by group II introns in Vitro

1996
Publisher Summary This chapter discusses experimental methods that are used in studies of self-splicing group II introns. Group II introns are found in organelle DNAs of fungi and photosynthetic eukaryotes and in bacterial genomes. The conserved secondary structures of group II introns consist of six substructures or domains, D1 through D6. There are
Philip S. Perlman, Mircea Podar
openaire   +3 more sources

Conformation of the Group II Intron Branch Site in Solution

Journal of the American Chemical Society, 2006
Group II introns are multidomain ribozymes that catalyze their own removal from pre-mRNA. The nucleophile for the first cleavage step is the 2'OH of a specific adenosine within domain 6 (D6), called the branch site. Mechanistic parallels and limited secondary structural similarity with the eukaryotic spliceosome lead many to speculate that the two ...
Nancy L. Greenbaum, Samuel H. Crayton, Jörg C. Schlatterer   +2 more
openaire   +3 more sources

Group II introns: structure, folding and splicing mechanism

bchm, 2007
Abstract Group II introns are large autocatalytic RNAs found in organellar genomes of plants and lower eukaryotes, as well as in some bacterial genomes. Interestingly, these ribozymes share characteristic traits with both spliceosomal introns and non-LTR retrotransposons and may have a common evolutionary ancestor.
Olga Fedorova, Nora Zingler
openaire   +3 more sources

[36] Sequences and classification of group I and group II introns

1989
Publisher Summary This chapter presents sequences and classification of group I and group II introns. The splicing of precursor RNAs (preRNAs) containing group I introns proceeds by a two-step transesterification mechanism, initiated by attack of the 3′-hydroxyl group of a free guanosine nucleotide on the 5′ splice site.
openaire   +3 more sources

Sexual health among adolescent and young adult cancer survivors: A scoping review from the Children's Oncology Group Adolescent and Young Adult Oncology Discipline Committee

Ca-A Cancer Journal for Clinicians, 2021
Brooke Cherven, Sharon L Bober, Kristin M Bingen   +2 more
exaly  

Molecular Mechanism and Evolution of Nuclear Pre-mRNA and Group II Intron Splicing: Insights from Cryo-Electron Microscopy Structures.

Chemical Reviews, 2018
W. P. Galej, N. Toor, A. Newman, K. Nagai   +3 more
semanticscholar   +1 more source

Cancer statistics for African American/Black People 2022

Ca-A Cancer Journal for Clinicians, 2022
Kimberly D Miller, Rebecca L Siegel
exaly