WebApr 17, 2014 · Folding and unfolding pathways for the human telomere quadruplex are defined by kinetic studies using CD, FRET, and 2-aminopurine fluorescence. Folding and unfolding reactions are slow and complex with sequentially formed intermediates. Spectra of reaction intermediates are captured for the first time. Folding to the final quadruplex … WebJul 1, 2024 · The precise suite of mechanisms by which biological systems modulate this equilibrium is not fully characterized. Several nucleic acid-binding proteins are known to alter G quadruplex folding, including ATP-dependent helicases [23], as well as non-helicase proteins, such as Lin28 and nucleolin, that do so in an energy-independent fashion [24, 25].
Folding and Unfolding Pathways of the Human Telomeric G-Quadruplex …
WebFeb 9, 2024 · Guanine-rich RNAs can fold into four-stranded structures, termed G-quadruplexes (G4-RNAs), and participate in a wide range of biological processes. Here … WebOct 20, 2024 · Given that a G-rich region in an RNA molecule is capable of folding into a tertiary RNA structure called RNA G-quadruplex (RG4), involving the base pairs on both Hoogsteen and Watson-Crick... helvetica para word
Stress promotes RNA G-quadruplex folding in human cells
WebSep 23, 2016 · An intriguing noncanonical structure is the RNA G-quadruplex (RG4), a four-stranded structure containing two or more layers of G-quartets, in which the Watson–Crick face of each of four G residues pairs to the Hoogsteen face of the neighboring G residues. ... As with the G3A2 quadruplex, when folding endogenous RG4 regions in … WebDec 21, 2010 · G-quadruplexes are a family of nucleic acid secondary structures based on the formation and stacking of quartets of coplanar guanines (G-quartets) ( Figure 1 ); they are stabilized by several cations, in particular potassium and sodium ( 37 ). Quadruplexes are present in locations other than at the telomere. Analysis of human, chimpanzee, mouse and rat genomes showed enormous number of potential G-quadruplex (pG4)-forming sequences in non-telomeric regions. A large number of the non-telomeric G-quadruplexes were found within gene promoters, and were conserved across the species. Similarly, large number of G-quadruplexes were found in the E. coli and hundreds of other microbial genomes. Here also, … helvetica partners