Ancient and novel small RNA pathways compensate for the loss of piRNAs in multiple independent nematode lineages. [PDF]
PLoS Biology, 2015 Small RNA pathways act at the front line of defence against transposable elements across the Eukaryota. In animals, Piwi interacting small RNAs (piRNAs) are a crucial arm of this defence.
Peter Sarkies +14 more
doaj +3 more sources
DNA-directed termination of RNA polymerase II transcription
Molecular Cell, 2023 RNA polymerase II (RNAPII) transcription involves initiation from a promoter, transcriptional elongation through the gene, and termination in the terminator region. In bacteria, terminators often contain specific DNA elements provoking polymerase dissociation, but RNAPII transcription termination is thought to be driven entirely by protein co-factors ...
Zhong Han +7 more
openaire +4 more sources
Polymerase Mu Is a DNA-Directed DNA/RNA Polymerase [PDF]
Molecular and Cellular Biology, 2003 DNA polymerases are defined as such because they use deoxynucleotides instead of ribonucleotides with high specificity. We show here that polymerase mu (pol μ), implicated in the nonhomologous end-joining pathway for repair of DNA double-strand breaks, incorporates both ribonucleotides and deoxynucleotides in a template-directed manner.
Stephanie A, Nick McElhinny +1 more
openaire +2 more sources
RNA-specific ribonucleotidyl transferases [PDF]
, 2007 RNA-specific nucleotidyl transferases (rNTrs) are a diverse family of template-independent polymerases that add ribonucleotides to the 3'-ends of RNA molecules.
Keller, W. +5 more
core +1 more source
Functional Consequences of Subunit Diversity in RNA Polymerases II and V
Cell Reports, 2012 Multisubunit RNA polymerases IV and V (Pol IV and Pol V) evolved as specialized forms of Pol II that mediate RNA-directed DNA methylation (RdDM) and transcriptional silencing of transposons, viruses, and endogenous repeats in plants.
Ek Han Tan +3 more
doaj +1 more source
Use of Site-Specifically Tethered Chemical Nucleases to Study Macromolecular Reactions
Biological Procedures Online, 2003 During a complex macromolecular reaction multiple changes in molecular conformation and interactions with ligands may occur. X-ray crystallography may provide only a limited set of snapshots of these changes.
Mukherjee Srabani, Sousa Rui
doaj +1 more source
Sequence motifs that distinguish ATP(CTP) : tRNA nucleotidyl transferases from eubacterial poly(A) polymerases [PDF]
, 2004 ATP(CTP):tRNA nucleotidyl transferases, tRNA maturing enzymes found in all organisms, and eubacterial poly(A) polymerases, enzymes involved in mRNA degradation, are so similar that until now their biochemical functions could not be distinguished by their
Keller, W. +3 more
core +1 more source
The RNA silencing enzyme RNA polymerase v is required for plant immunity. [PDF]
PLoS Genetics, 2011 RNA-directed DNA methylation (RdDM) is an epigenetic control mechanism driven by small interfering RNAs (siRNAs) that influence gene function. In plants, little is known of the involvement of the RdDM pathway in regulating traits related to immune ...
Ana López +4 more
doaj +1 more source
RNase-like domain in DNA-directed RNA polymerase II. [PDF]
Proceedings of the National Academy of Sciences, 1991 DNA-directed RNA polymerase is responsible for gene expression. Despite its importance, many details of its function and higher-order structure still remain unknown. We report here a local sequence similarity between the second largest subunit of RNA polymerase II and bacterial RNases Ba (barnase), Bi, and St. The most remarkable similarity is that the
T, Shirai, M, Go
openaire +2 more sources
Identification of an ortholog of the eukaryotic RNA polymerase III subunit RPC34 in Crenarchaeota and Thaumarchaeota suggests specialization of RNA polymerases for coding and non-coding RNAs in Archaea. [PDF]
, 2009 Contains fulltext : 80405.pdf (Publisher’s version ) (Open Access)One of the hallmarks of eukaryotic information processing is the co-existence of 3 distinct, multi-subunit RNA polymerase complexes that are dedicated to the ...
Makarova, K.S. +19 more
core +1 more source