Results 61 to 70 of about 388,782 (280)

Optimal Random Libraries for the Isolation of Catalytic RNA [PDF]

RNA Biology, 2005
The relationship between ribozyme size and catalytic activity is of fundamental importance for RNA catalysis and molecular evolution in the RNA world. We have performed a series of competitive in vitro selection experiments to probe the relationship using RNA libraries containing size-heterogeneous random regions.
Coleman, Tricia M., Huang, Faqing
openaire   +3 more sources

The subcellular distribution of phosphorylated Y‐box‐binding protein‐1 at S102 in colorectal cancer patients, stratified by KRAS mutational status and clinicopathological features

Molecular Oncology, EarlyView.
This study identifies nuclear YB‐1 S102 phosphorylation as a marker associated with KRAS and FBXW7 mutations in colorectal cancer. Mutated KRAS correlates specifically with nuclear, not cytoplasmic, S102 YB‐1. These findings provide the first ex vivo evidence of this link in CRC and suggest future studies should assess the prognostic and therapeutic ...
Konstanze Lettau, Stephan Forchhammer, Birgit Fehrenbacher, Lejla Mahmutovic, Marcus Scharpf, Gunnar Blumenstock, Martin Schaller, Irina Bonzheim, Shayan Khozooei, Mahmoud Toulany   +9 more
wiley   +1 more source

RNA-directed DNA methylation involves co-transcriptional small-RNA-guided slicing of polymerase V transcripts in Arabidopsis. [PDF]

, 2018
Small RNAs regulate chromatin modifications such as DNA methylation and gene silencing across eukaryotic genomes. In plants, RNA-directed DNA methylation (RdDM) requires 24-nucleotide small interfering RNAs (siRNAs) that bind to ARGONAUTE 4 (AGO4) and ...
Chory, Joanne, Duttke, Sascha H, Feng, Suhua, Gallego-Bartolome, Javier, Groth, Martin, Hetzel, Jonathan, Jacobsen, Steven E, Kuo, Hsuan Yu, Liu, Wanlu, Wang, Zonghua, Zhai, Jixian, Zhong, Zhenhui   +11 more
core   +1 more source

Raphin‐1 mediates the survival and sensitivity to radiation of pediatric‐type diffuse high‐grade glioma via phosphorylated eukaryotic initiation factor 2α‐dependent and ‐independent processes

Molecular Oncology, EarlyView.
Raphin‐1 reduces the survival of PED‐DHGG cells and enhances their radiation sensitivity through both PeIF2α‐dependent and PeIF2α‐independent mechanisms. Raphin‐1 sustains elevated levels of PeIF2α, contributing to its PeIF2α‐dependent effects. Additionally, raphin‐1 interacts with CReP to mediate a separate radiosensitizing pathway that operates ...
Karin Eytan, Moshe Leitner, Amos Toren, Shoshana Paglin, Michal Yalon   +4 more
wiley   +1 more source

Catalytic Role for RNA in DNA Replication [PDF]

Nature New Biology, 1972
THERE are two biochemical systems which probably evolved before the development of accurate polynucleotide-specified protein synthesis: these are the system for polynucleotide replication and the machinery of protein synthesis itself1, 2. Before accurately specified proteins became available, these processes were perhaps catalysed by polynucleotide ...
openaire   +2 more sources

Targeting carbonic anhydrase IX/XII prevents the anti‐ferroptotic effect of stromal lactic acid in prostate carcinoma

Molecular Oncology, EarlyView.
In prostate carcinoma, lactic acid, secreted by highly glycolytic cancer‐associated fibroblasts, is imported into tumor cells through the MCT1 transporter and prevents RSL3 and erastin‐induced ferroptosis (A). Targeting of carbonic anhydrase IX/XII, the main extracellular pH regulators, in tumor and stromal cells reduces microenvironmental acidosis and
Elisa Pardella, Giuseppina Comito, Luigi Ippolito, Erica Pranzini, Marta Iozzo, Giulia Gangarossa, Francesca Virgilio, Silvia Bua, Alessio Nocentini, Giada Sandrini, Nicla Lorito, Marina Bacci, Gabriella Nesi, Pietro Spatafora, Sergio Serni, Claudiu T. Supuran, Andrea Morandi, Paola Chiarugi, Elisa Giannoni   +18 more
wiley   +1 more source

Origin & influence of autocatalytic reaction networks at the advent of the RNA world

RNA Biology
Research on the origin of life investigates the transition from abiotic chemistry to the emergence of biology, with the ‘RNA world hypothesis’ as the leading theory. RNA’s dual role in storage and catalysis suggests its importance in this narrative.
Stephen A. Zorc, Raktim N. Roy
doaj   +1 more source

Virtual high-throughput screening identifies mycophenolic acid as a novel RNA capping inhibitor. [PDF]

PLoS ONE, 2011
The RNA guanylyltransferase (GTase) is involved in the synthesis of the (m7)Gppp-RNA cap structure found at the 5' end of eukaryotic mRNAs. GTases are members of the covalent nucleotidyl transferase superfamily, which also includes DNA and RNA ligases ...
Maude Tremblay-Létourneau, Simon Despins, Isabelle Bougie, Martin Bisaillon   +3 more
doaj   +1 more source

Adenosine‐to‐inosine editing of miR‐200b‐3p is associated with the progression of high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
A‐to‐I editing of miRNAs, particularly miR‐200b‐3p, contributes to HGSOC progression by enhancing cancer cell proliferation, migration and 3D growth. The edited form is linked to poorer patient survival and the identification of novel molecular targets.
Magdalena Niemira, Anna Skwarska, Karolina Chwialkowska, Agnieszka Ostrowska, Gabriela Sokolowska, Anna Zeller, Anna Erol, Andrzej Eljaszewicz, Bartosz Hanczaruk, Anna Michalska‐Falkowska, Agnieszka Tarasik, Joanna Reszec‐Gielazyn, Pawel Knapp, Marcin Moniuszko, Adam Kretowski   +14 more
wiley   +1 more source

Within and Beyond the Nucleotide Addition Cycle of Viral RNA-dependent RNA Polymerases

Frontiers in Molecular Biosciences, 2022
Nucleotide addition cycle (NAC) is a fundamental process utilized by nucleic acid polymerases when carrying out nucleic acid biosynthesis. An induced-fit mechanism is usually taken by these polymerases upon NTP/dNTP substrate binding, leading to active ...
Peng Gong, Peng Gong
doaj   +1 more source