Mg2+ impacts the twister ribozyme through push-pull stabilization of nonsequential phosphate pairs

AA Kognole, AD MacKerell - Biophysical Journal, 2020 - cell.com
RNA molecules perform a variety of biological functions for which the correct three-
dimensional structure is essential, including as ribozymes where they catalyze chemical …

Coordination Environment of a Site-Bound Metal Ion in the Hammerhead Ribozyme Determined by 15N and 2H ESEEM Spectroscopy

M Vogt, S Lahiri, CG Hoogstraten, RD Britt… - Journal of the …, 2006 - ACS Publications
Although site-bound Mg2+ ions have been proposed to influence RNA structure and
function, establishing the molecular properties of such sites has been challenging due …

Functional identification of catalytic metal ion binding sites within RNA

JL Hougland, AV Kravchuk, D Herschlag… - PLoS biology, 2005 - journals.plos.org
The viability of living systems depends inextricably on enzymes that catalyze phosphoryl
transfer reactions. For many enzymes in this class, including several ribozymes, divalent …

Complexity in pH-Dependent Ribozyme Kinetics: Dark pKa Shifts and Wavy Rate–pH Profiles

EA Frankel, PC Bevilacqua - Biochemistry, 2018 - ACS Publications
Charged bases occur in RNA enzymes, or ribozymes, where they play key roles in catalysis.
Cationic bases donate protons and perform electrostatic catalysis, while anionic bases …

Metal ions and RNA folding: a highly charged topic with a dynamic future

SA Woodson - Current opinion in chemical biology, 2005 - Elsevier
Metal ions are required to stabilize RNA tertiary structure and to begin the folding process.
How different metal ions enable RNAs to fold depends on the electrostatic potential of the …

Third Metal Ion Dictates the Catalytic Activity of the Two‐Metal‐Ion Pre‐Ribosomal RNA‐Processing Machinery

J Borišek, J Aupič, A Magistrato - Angewandte Chemie International … - Wiley Online Library
Nucleic acid processing enzymes use a two‐Mg2+‐ion motif to promote the formation and
cleavage of phosphodiester bonds. Yet, recent evidence demonstrates the presence of …

Molecular dynamics analysis of Mg2+‐dependent cleavage of a pistol ribozyme reveals a fail‐safe secondary ion for catalysis

NN Joseph, RN Roy, TA Steitz - Journal of Computational …, 2020 - Wiley Online Library
Pistol ribozymes comprise a class of small, self‐cleaving RNAs discovered via comparative
genomic analysis. Prior work in the field has probed the kinetics of the cleavage reaction, as …

Single-molecule enzymology of RNA: essential functional groups impact catalysis from a distance

D Rueda, G Bokinsky, MM Rhodes… - Proceedings of the …, 2004 - National Acad Sciences
The hairpin ribozyme is a minimalist paradigm for studying RNA folding and function. In this
enzyme, two domains dock by induced fit to form a catalytic core that mediates a specific …

A unique mechanism for RNA catalysis: the role of metal cofactors in hairpin ribozyme cleavage

A Hampel, JA Cowan - Chemistry & biology, 1997 - cell.com
Background: Ribozymes are biological catalysts that promote the hydrolysis and
transesterification of phosphate diesters of RNA. They typically require divalent magnesium …

Electrostatic interactions in the hairpin ribozyme account for the majority of the rate acceleration without chemical participation by nucleobases

K Nam, J Gao, DM York - Rna, 2008 - rnajournal.cshlp.org
Molecular dynamics simulations using a combined quantum mechanical/molecular
mechanical potential are used to determine the two-dimensional free energy profiles for the …