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4 acid domain-containing protein 1 (SAMHD1), a dNTP triphosphohydrolase, regulates the levels of cellul
5 nfluence of the restriction factor SAMHD1, a dNTP hydrolase (dNTPase) and RNase, on HBV replication.
12 mportance of SAMHD1 in the regulation of all dNTP pools and suggest that dGK inside mitochondria has
13 research was demonstrated by quantifying all dNTPs in CEM-SS leukemia cells with and without hydroxyu
14 on fidelity, yet the consequences of altered dNTP pools on replication fidelity have not previously b
15 g a collection of yeast strains with altered dNTP pools, we discovered an inverse relationship betwee
16 P assays, RT-qPCR and ChIP-qPCR methods, and dNTP analyses, we show that DDR activation in the buddin
17 certain combinations of loop 2 mutations and dNTP effectors perturbed ATP's role as an allosteric act
20 sion droplets in the presence of primers and dNTPs, followed by the recovery of the partner genes via
22 We demonstrate that some conjugates act as dNTP analogues and HIV-1 reverse transcriptase (RT) cata
27 d cellular concentration discrepancy between dNTPs and rNTPs present pharmacological and mechanistic
30 e EC50(dNTP) values for SAMHD1 activation by dNTPs are in the 2-20 mum range, and the half-life of th
32 ymes display broad activity toward canonical dNTPs, such as the dNTPase SAMHD1 that blocks reverse tr
34 volved in RNR substrate production can cause dNTP imbalances, which cannot be compensated by RNR or o
37 1 is a phosphohydrolase maintaining cellular dNTP homeostasis but also acts as a critical regulator i
38 ght to result from the depletion of cellular dNTP pools, but it remains controversial whether the dNT
40 , reveals how SAMHD1 down-regulates cellular dNTP and modulates the efficacy of nucleoside-based anti
41 phosphohydrolase activity regulates cellular dNTP concentration, reducing levels below those required
42 s involved in the regulation of the cellular dNTP pool and has been linked to cancer progression.
43 ohydrolase activity by reducing the cellular dNTP pool to a level that cannot support productive reve
45 scription (RT) through depletion of cellular dNTPs but is naturally switched off by phosphorylation i
50 rivatives through the depletion of competing dNTPs, we show here that SAMHD1 reduces Ara-C cytotoxici
53 r ternary complexes with a non-complementary dNTP confirmed the presence of a state corresponding to
57 n is mimicked by a CXY group (beta,gamma-CXY-dNTPs) have provided information about DNA polymerase ca
60 phosphate triphosphohydrolase that decreases dNTP pools, is frequently mutated in colon cancers, that
61 acted in the absence of SAMHD1 degradation, dNTP pool elevation, or changes in SAMHD1 phosphorylatio
62 MHD1 has been reported to be able to degrade dNTPs and viral nucleic acids, which may both hamper HIV
63 catalyzed the addition of deoxynucleotides (dNTP) containing biotinlated 2'-deoxyadenosine 5'-tripho
64 ce and concentration of deoxyribonucleotide (dNTP) pools, which are strictly regulated by ribonucleot
68 embryos synthesize DNA, maternally deposited dNTPs can generate less than half of the genomes needed
72 recatalytic ternary structures (hPolbeta.DNA.dNTP) for both extension contexts, wherein the incoming
73 omoles of and excellent specificity for each dNTP against the other dNTPs, rNTPs, and dUTP evidenced
78 ite inositol hexakisphosphate (IP6) enhances dNTP import, while binding of synthesized molecules like
79 leading strand DNA polymerase, Pol epsilon, dNTP depletion, and chemical inhibition of DNA polymeras
81 ncing decreases dNTP levels, while exogenous dNTPs rescues the proliferation defect induced by lincNM
86 nscriptase ribozyme can incorporate all four dNTPs and can generate products containing up to 32 deox
87 lute and relative concentrations of the four dNTPs are key determinants of DNA replication fidelity,
88 ngstrom cleft separates SAMHD1 residues from dNTP bases, abolishing nucleotide-type discrimination.
96 subunit M2 (RRM2), a rate-limiting enzyme in dNTP synthesis, induced premature senescence with concom
101 ing this elevation by strategic mutations in dNTP metabolism genes eliminated the mutator effect of p
108 te that the binding affinity of the incoming dNTP is controlled by the overall hydrophobicity of the
109 ses not only select the base of the incoming dNTP to form a Watson-Crick pair with the template base
114 h a defect in respiration failed to increase dNTP synthesis and exhibited reduced fitness in the pres
116 ase and exonuclease activities has increased dNTP concentrations and an increased mutation rate at th
118 R and indicate that the benefit of increased dNTP synthesis in the face of DNA damage outweighs possi
119 eaction vessel that identifies an individual dNTP based on a robust fluorescence signal, with the det
120 ship between the concentration of individual dNTPs and the amount of the corresponding ribonucleotide
126 and specific quantification of intracellular dNTPs and has the potential to become an advanced tool f
127 ators in lincNMR-depleted cells like the key dNTP synthesizing enzymes RRM2, TYMS and TK1, implicatin
129 ed in absence of RER and presence of limited dNTP pools, Top1-mediated genome instability leads to se
133 ose activity is required for maintaining low dNTP concentrations in non-cycling T cells, dendritic ce
136 f retroviruses in macrophages by maintaining dNTP pools at low levels, Escherichia coli (Ec)-dGTPase
138 nds to the closed state of the enzyme-DNA-Mg.dNTP complex (K(d) = 3.7 mM) to facilitate catalysis.
143 ibitors presumably as a result of modulating dNTP pools that compete for recruitment by viral polymer
144 siRNA transfection the composition of the mt dNTP pool approached that of the controls, and mtDNA cop
148 of and distinguish between, the four natural dNTPs at the single-molecule level, with negligible cros
149 difficult DNA and incorporating non-natural dNTPs, due to their low fidelity and loose active site,
150 eraging 13-fold higher than those of natural dNTPs, and kcat values within 1.5-fold of those of nativ
152 wever, to what extent the absence of de novo dNTP production can be compensated for by the salvage pa
154 t dNTP salvage cannot substitute for de novo dNTP synthesis in the heart and that cardiomyocytes and
156 t advocates the feasibility of designing NTP/dNTP analogues by chemical substitutions to nucleotide a
158 gh genetic changes that alter the balance of dNTP binding and dissociation from DNA polymerases.
164 -stimulated respiration drove enlargement of dNTP pools; cells with a defect in respiration failed to
165 zed "on the go." The rate-limiting enzyme of dNTP synthesis, ribonucleotide reductase, is inhibited b
166 t the level of RT that acts independently of dNTP concentrations and is specific to resting CD4 T cel
167 nalysis of these mutants paints a picture of dNTP regulation in whole animals quite different from th
168 is review, we discuss how a key regulator of dNTP biosynthesis in mammals, the enzyme ribonucleotide
170 cterization of an RTIC after three rounds of dNTP incorporation (+3), the first major pausing point d
173 cytosolic compartment and the fine-tuning of dNTP levels for chloroplast translation and development.
176 elicase to unwind DNA, but in the absence of dNTPs, this leads to excessive single-strand DNA that ex
177 g as measured by smFRET, but the addition of dNTPs induces the formation of a ternary complex having
179 een dN frequencies in RNA and the balance of dNTPs and ribonucleoside 5'-triphosphates (rNTPs) in the
180 back inhibition renders the concentration of dNTPs at gastrulation robust, with respect to large vari
181 d protease and that Lon-dependent control of dNTPs improves fitness during protein misfolding conditi
185 odel, we demonstrate that when the levels of dNTPs are abnormally high, nuclear cleavages fail to suf
188 -1 cells is suppressed by elevated levels of dNTPs in vivo, and the activity of Pol epsilon is compro
189 is disrupted in embryos with high levels of dNTPs, which have been recently shown to cause abnormall
191 equivalent of the alpha-phosphate oxygen of dNTPs and two oxygens of the phosphonate group of the al
195 uction of p21 in MDDCs decreases the pool of dNTPs and increases the antiviral active isoform of SAMH
197 in the presence of excess dCTP or a pool of dNTPs, implying that VEN4, like human SAMHD1, is involve
201 itive to the relative concentration ratio of dNTPs specified by the RNA template slippage-prone seque
202 itive to the relative concentration ratio of dNTPs specified by the RNA template slippage-prone seque
205 vity and consequently decreased synthesis of dNTPs with concomitant inhibition of DNA replication, ar
207 s cells from invading viruses that depend on dNTPs to replicate and is frequently mutated in cancers
208 specificity for each dNTP against the other dNTPs, rNTPs, and dUTP evidenced the strong performance
209 vivo data support a model where an oxidized dNTPs pool together with aberrant BER processing contrib
210 anisms by which naturally occurring oxidized dNTPs and therapeutic dNTPs inhibit telomerase-mediated
211 , mutations and drug treatments that perturb dNTP pool levels disproportionately influence the viabil
212 iphosphohydrolase that cleaves physiological dNTPs into deoxyribonucleosides and inorganic triphospha
213 blocker scaffolds, coupled to the polymerase/dNTP machinery, lead, in the presence of two primers P(1
214 blocker scaffolds, coupled to the polymerase/dNTP machinery, leads to the emergence of a CDN composed
215 /blocker scaffolds coupled to the polymerase/dNTP replication machinery leads, in the presence of a p
216 emplate/blocker scaffolds and the polymerase/dNTPs, the P(1)-guided emergence of a [3 x 3] CDN is dem
217 d their coupling to a nicking/polymerization/dNTP replication machinery, the amplified high-throughpu
222 ave examined whether oxidation of the purine dNTPs in the dNTP pool provides a source of DNA damage t
224 the suppressors identified here may regulate dNTP pool size, as well as similarities in phenotypes be
225 aminases, and SAMHD1 (a cell cycle-regulated dNTP triphosphohydrolase) dNTPase, which maintains low c
226 that SAMHD1-mediated dNTP balance regulates dNTP-sensitive DNA end-processing enzyme and promotes CS
228 he shift from 'S-phase' to 'damage-response' dNTP levels only minimally affected the activity, fideli
230 contrast, pol2-4 and POL2 cells have similar dNTP levels, which decline in the absence of Dun1 and ri
232 ve, and alternative techniques that simplify dNTP quantification would present very useful complement
233 t instance of a Y-family-polymerase-specific dNTP, and this method could be used to probe the activit
237 verity, suggesting that treatments targeting dNTP pools could modulate mutator phenotypes for therapy
238 fter the addition of three and five template dNTPs, may serve as checkpoints to regulate the precise
244 Ca(2+) and Mn(2+) substantially decrease the dNTP dissociation rate relative to Mg(2+), while Ca(2+)
245 NSAH depresses dGTP and dATP levels in the dNTP pool causing S-phase arrest, providing evidence for
246 whether oxidation of the purine dNTPs in the dNTP pool provides a source of DNA damage that promotes
248 scriptase revealed that alpha-CNPs mimic the dNTP binding through a carboxylate oxygen, two phosphona
249 d other viral infections by depletion of the dNTP pool to a level that cannot support replication.
250 RRM2 at K95 results in the reduction of the dNTP pool, DNA replication fork stalling, and the suppre
251 Both pharmacological agents could reduce the dNTP production in a time- and dose-dependent manner.
254 treating HCMV, knowing the provenance of the dNTPs incorporated into viral DNA may help inform antivi
255 gg is provided with at most one-third of the dNTPs needed to complete the thirteen rounds of DNA repl
256 lly occurring oxidized dNTPs and therapeutic dNTPs inhibit telomerase-mediated telomere elongation.
260 , SAMHD1 blocks HIV-1 infection through this dNTP triphosphohydrolase activity by reducing the cellul
262 We examined their effects on translocation, dNTP binding, and primer strand transfer between the pol
264 cellular 2'-deoxynucleoside-5'-triphosphate (dNTP) homeostasis by catalysing the hydrolysis of dNTPs
266 y due to lower deoxynucleoside triphosphate (dNTP) levels and the presence of multiple restriction fa
269 SAMHD1 is a deoxynucleoside triphosphate (dNTP) triphosphohydrolase that cleaves physiological dNT
271 f cellular deoxyribonucleoside triphosphate (dNTP) levels is important for studying pathologies, geno
272 n controls deoxyribonucleoside triphosphate (dNTP) pools during stress through degradation of the tra
274 that uses step-wise nucleotide triphosphate (dNTP) release, capture and detection in microdroplets fr
275 de triphosphate/ribonucleoside triphosphate (dNTP/rNTP) ratios, by the ability of DNA polymerases to
278 intracellular deoxynucleoside triphosphates (dNTPs) to a lower level that restricts viral DNA synthes
279 ailability of deoxynucleoside triphosphates (dNTPs), which are needed for HIV-1 reverse transcription
281 cle, requires deoxynucleotide triphosphates (dNTPs) to fuel DNA synthesis, thus requiring penetration
282 thesis of deoxyribonucleoside triphosphates (dNTPs) and essential for both DNA replication and the re
283 rate both deoxyribonucleoside triphosphates (dNTPs) and ribonucleoside triphosphates (rNTPs) and can
284 thesis of deoxyribonucleoside triphosphates (dNTPs) that are essential for DNA replication and DNA da
286 those of deoxyribonucleoside triphosphates (dNTPs), thereby influencing the frequency of incorporati
287 thesis of deoxyribonucleotide triphosphates (dNTPs) building blocks for DNA synthesis, and is a well-
290 ural and unnatural nucleoside triphosphates (dNTPs and xNTPs) using protocols that are efficient, ine
291 l and noncanonical nucleoside triphosphates (dNTPs) and has been associated with cancer progression a
295 V irradiation in vivo was not decreased when dNTP synthesis was suppressed by hydroxyurea, indicating
298 h to single-molecule DNA sequencing in which dNTPs, released by pyrophosphorolysis from the strand to
300 nario of DNA polymerase enzyme kinetics with dNTP levels that can vastly change, depending on cell pr