Results 11 to 20 of about 18,960 (170)

A Faster Triphosphorylation Ribozyme. [PDF]

open access: yesPLoS ONE, 2015
In support of the RNA world hypothesis, previous studies identified trimetaphosphate (Tmp) as a plausible energy source for RNA world organisms. In one of these studies, catalytic RNAs (ribozymes) that catalyze the triphosphorylation of RNA 5'-hydroxyl ...
Gregory F Dolan   +2 more
doaj   +3 more sources

Arginine cofactors on the polymerase ribozyme. [PDF]

open access: yesPLoS ONE, 2011
The RNA world hypothesis states that the early evolution of life went through a stage in which RNA served both as genome and as catalyst. The central catalyst in an RNA world organism would have been a ribozyme that catalyzed RNA polymerization to ...
Chengguo Yao   +4 more
doaj   +3 more sources

Structure-based insights into self-cleavage by a four-way junctional twister-sister ribozyme

open access: yesNature Communications, 2017
Twister-sister is a self-cleaving ribozyme. Here, the authors report the 2.0 Å crystal structure of the four-way junctional twister-sister ribozyme in the pre-catalytic state and discuss mechanistic implications based on their mutagenesis experiments and
Luqian Zheng   +7 more
doaj   +2 more sources

RNA-Guided Engineering of the Chloroplast Genome Enabled by Plastid-Expressed Guide RNAs. [PDF]

open access: yesPlant Biotechnol J
ABSTRACT Our goal is to develop RNA‐guided engineering of the chloroplast genome using the CRISPR/Cas9 system. We designed chloroplast minigenes to obtain properly sized single guide RNAs (sgRNAs) in tobacco chloroplasts. The sgRNA 5′ end is defined by transcription from an rRNA operon promoter, and its 3′ end by processing a downstream tRNA (trnG) or ...
Mirzaee M   +3 more
europepmc   +2 more sources

Isothiazologuanosine (<sup>tz</sup>G) as Environmentally Sensitive Fluorescent Reporter in RNA. [PDF]

open access: yesAngew Chem Int Ed Engl
The emissive isothiazologuanosine analog tzG is synthesized for the first time as RNA phosphoramidite building block for solid‐phase synthesis. Due to its isomorphic and isofunctional characteristics, tzG forms Watson–Crick base pairs and can be used as fluorescent probe to monitor (deoxy)ribozyme activity.
Dietzsch J, Tor Y, Höbartner C.
europepmc   +2 more sources

Dynamic signal processing by ribozyme-mediated RNA circuits to control gene expression [PDF]

open access: yes, 2014
Organisms have different circuitries that allow converting signal molecule levels to changes in gene expression. An important challenge in synthetic biology involves the de novo design of RNA modules enabling dynamic signal processing in live cells. This
Satya Prakash   +21 more
core   +1 more source

The Lariat Capping Ribozyme

open access: yes, 2021
The lariat capping ribozyme (LCrz) constitutes an independent class of ribozymes. It is the defining feature of twin-ribozyme group I introns found in eukaryotic microorganisms.
Steinar Daae Johansen   +8 more
core   +1 more source

Fluorescence Polarization for Monitoring Ribozyme Reactions in Real Time

open access: yesBioTechniques, 2000
Fluorescence polarization has been used recently to monitor diverse macromolecular interactions. In this report, the application of fluorescence polarization has been extended to monitor ribozyme reactions in real time.
K.K. Singh   +4 more
doaj   +1 more source

Inspecting the Ribozyme Region of Hepatitis Delta Virus Genotype 1: Conservation and Variability

open access: yesViruses, 2022
The hepatitis delta virus (HDV) genome has an autocatalytic region called the ribozyme, which is essential for viral replication. The aim of this study was to use next-generation sequencing (NGS) to analyze the ribozyme quasispecies (QS) in order to ...
Beatriz Pacin-Ruiz   +17 more
doaj   +1 more source

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