Results 91 to 100 of about 5,237 (166)

Quasispecies-like behavior observed in catalytic RNA populations evolving in a test tube [PDF]

open access: yes, 2010
Background: During the RNA World, molecular populations were probably very small and highly susceptible to the force of strong random drift. In conjunction with Muller\u27s Ratchet, this would have imposed difficulties for the preservation of the genetic
Díaz Arenas, Carolina, Lehman, Niles
core   +3 more sources

Novel Mechanism for Priming Aromatic Polyketide Synthases [PDF]

open access: yes, 2004
In this issue of Chemistry & Biology, a novel priming mechanism is proposed for aromatic polyketide biosynthesis, with an iterative type I polyketide synthase generating a starter unit primed for a type II polyketide synthase [6].
Salas, José A
core   +1 more source

Optimization and optimality of a short ribozyme ligase that joins non-Watson–Crick base pairings

open access: yesRNA, 2001
A small ribozyme ligase (L1) selected from a random sequence population appears to utilize non-Watson-Crick base pairs at its ligation junction. Mutational and selection analyses confirmed the presence of these base pairings. Randomization of the L1 core and selection of active ligases yielded highly active variants whose rates were on the order of 1 ...
Jay R. Hesselberth   +2 more
openaire   +4 more sources

Ribozymes of the RNA World: Investigating Ancient Enzymes through Modern Self-Cleaving Ribozymes. [PDF]

open access: yes, 2016
Ribozymes are RNAs that can perform catalytic functions. The discovery of ribozymes was an important milestone in science because it not only opened new avenues of research but also provided insights into the origins of life on Earth.
Mir, Aamir
core   +1 more source

Protecting the proteome: Eukaryotic cotranslational quality control pathways. [PDF]

open access: yes, 2014
The correct decoding of messenger RNAs (mRNAs) into proteins is an essential cellular task. The translational process is monitored by several quality control (QC) mechanisms that recognize defective translation complexes in which ribosomes are stalled on
Bennett, Eric J, Lykke-Andersen, Jens
core   +2 more sources

Nucleozymes [PDF]

open access: yes, 2004
Nucleozymes containing ribonucleotides and deoxyribonucleotides or nucleic acid analogues are described herein. The nucleozymes have catalytic activity and are significantly more resistant to degradation than their all-RNA ribozyme counterparts.
Cedergren, Robert J.   +4 more
core   +1 more source

Molecular Crowding Facilitates Ribozyme-Catalyzed RNA Assembly. [PDF]

open access: yesACS Cent Sci, 2023
DasGupta S, Zhang S, Szostak JW.
europepmc   +1 more source

Circular mRNA: A novel therapeutic agent. [PDF]

open access: yesBiotechnol Notes, 2023
Wang X, Dong J, Lu Y.
europepmc   +1 more source

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