The double life of UPF1 in RNA and DNA stability pathways
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The eukaryotic nonsense-mediated mRNA decay (NMD) pathway degrades mRNAs carrying premature stop codons (PTC). In humans, NMD depends on the RNA- and DNA-dependent 5'-3' helicase UPF1 and six other gene products referred to as SMG1, UPF2, UPF3, EST1A/SMG6, ...
Telomeres, the protective caps of eukaryotic chromosomes, are maintained by the enzyme telomerase. This telomere-specific reverse transcriptase (RT) uses a small region of its RNA subunit as template to synthesize telomeric DNA, which is generally G/T rich ...
We have analyzed the subnuclear position of early- and late-firing origins of DNA replication in intact yeast cells using fluorescence in situ hybridization and green fluorescent protein (GFP)-tagged chromosomal domains. In both cases, origin position was ...
When preadipocytes reenter the cell cycle, PPAR gamma expression is induced, coincident with an increase in DNA synthesis, suggesting the involvement of the E2F family of cell cycle regulators. We show here that E2F1 induces PPAR gamma transcription during ...
Organoruthenium compds. have emerged as promising novel anticancer agents but very little is known about their mol. mechanism of action. Here, we present classical and mixed QM/MM first-principles MD simulations of two ruthenium(II) compds. and their bindi ...
Adeno-associated virus type 2 (AAV2) infection incites cells to arrest with 4N DNA content or die if the p53 pathway is defective. This arrest depends on AAV2 DNA, which is single stranded with inverted terminal repeats that serve as primers during viral D ...
A major goal of molecular oncology is to identify means to kill cells lacking p53 function. Most current cancer therapy is based on damaging cellular DNA by irradiation or chemicals. Recent reports support the notion that, in the event of DNA damage, the p ...
Little is known about the dynamics of chromosomes in interphase nuclei. By tagging four chromosomal regions with a green fluorescent protein fusion to lac repressor, we monitored the movement and subnuclear position of specific sites in the yeast genome, s ...
To preorganize PNA for duplex formation, a new cyclic pyrrolidinone PNA analog has been designed. In this analog the aminoethyl-glycine backbone and the methylene-carbonyl linker are connected, introducing two chiral centers compared to PNA. The four stere ...
Here a simple in vitro assay was used to investigate the disassembly of nanoparticles of polyethylenimine (PEI) and DNA. Particles were formed with various PEIs, allowed to mature for 10 min, and then exposed to different competitors (RNA, DNA, BSA or hepa ...