Crystal structure of an RNA-cleaving DNAzyme
Nature Communications, 2017 RNA-cleaving DNA enzymes are catalytic DNA that can cleave RNA in a sequence-specific manner. Here, the authors report three crystal structures of the 8–17 DNAzyme that include the pre-catalytic state of the RNA cleavage reaction, providing insight into ...
Hehua Liu +14 more
doaj +1 more source
Eukaryote-Specific Insertion Elements Control Human ARGONAUTE Slicer Activity
Cell Reports, 2013 We have solved the crystal structure of human ARGONAUTE1 (hAGO1) bound to endogenous 5′-phosphorylated guide RNAs. To identify changes that evolutionarily rendered hAGO1 inactive, we compared our structure with guide-RNA-containing and cleavage-active ...
Kotaro Nakanishi +8 more
doaj +1 more source
Primase-polymerases are a functionally diverse superfamily of replication and repair enzymes [PDF]
, 2015 Until relatively recently, DNA primases were viewed simply as a class of proteins that synthesize short RNA primers requisite for the initiation of DNA replication.
Aidan J. Doherty +17 more
core +1 more source
Non-catalytic Roles of Tet2 Are Essential to Regulate Hematopoietic Stem and Progenitor Cell Homeostasis [PDF]
, 2019 The Ten-eleven translocation (TET) enzymes regulate gene expression by promoting DNA demethylation and partnering with chromatin modifiers. TET2, a member of this family, is frequently mutated in hematological disorders.
Abdel-Wahab +45 more
core +1 more source
Many Activities, One Structure: Functional Plasticity of Ribozyme Folds
Molecules, 2016 Catalytic RNAs, or ribozymes, are involved in a number of essential biological processes, such as replication of RNA genomes and mobile genetic elements, RNA splicing, translation, and RNA degradation.
Matthew W.L. Lau +1 more
doaj +1 more source
The telomerase essential N-terminal domain promotes DNA synthesis by stabilizing short RNA-DNA hybrids. [PDF]
, 2015 Telomerase is an enzyme that adds repetitive DNA sequences to the ends of chromosomes and consists of two main subunits: the telomerase reverse transcriptase (TERT) protein and an associated telomerase RNA (TER). The telomerase essential N-terminal (TEN)
Akiyama, Benjamin M +2 more
core +2 more sources
The Origin of Life: Models and Data. [PDF]
, 2017 A general framework for conventional models of the origin of life (OOL) is the specification of a 'privileged function.' A privileged function is an extant biological function that is excised from its biological context, elevated in importance over other
Lanier, Kathryn A, Williams, Loren Dean
core +1 more source
Frontiers in Microbiology, 2019 The RNA-dependent RNA polymerases (RdRPs) encoded by the RNA viruses are a unique class of nucleic acid polymerases. Each viral RdRP contains a 500–600 residue catalytic module with palm, fingers, and thumb domains forming an encircled human right hand ...
Hengxia Jia, Hengxia Jia, Peng Gong
doaj +1 more source
Evolution of RNA-protein interactions: non-specific binding led to RNA splicing activity of fungal mitochondrial tyrosyl-tRNA synthetases. [PDF]
PLoS Biology, 2014 The Neurospora crassa mitochondrial tyrosyl-tRNA synthetase (mtTyrRS; CYT-18 protein) evolved a new function as a group I intron splicing factor by acquiring the ability to bind group I intron RNAs and stabilize their catalytically active RNA structure ...
Lilian T Lamech +2 more
doaj +1 more source
dCas9-based epigenome editing suggests acquisition of histone methylation is not sufficient for target gene repression. [PDF]
, 2017 Distinct epigenomic profiles of histone marks have been associated with gene expression, but questions regarding the causal relationship remain. Here we investigated the activity of a broad collection of genomically targeted epigenetic regulators that ...
Farnham, Peggy J +8 more
core +2 more sources