搜索范围
857858
应用筛选条件
关键词:'857858'
显示 1-30 #N/A 32 条结果 关于 "857858" 范围 论文
Doreen Dobritzsch et al.
The Journal of biological chemistry, 277(15), 13155-13166 (2002-01-18)
Dihydroprymidine dehydrogenase catalyzes the first and rate-limiting step in pyrimidine degradation by converting pyrimidines to the corresponding 5,6- dihydro compounds. The three-dimensional structures of a binary complex with the inhibitor 5-iodouracil and two ternary complexes with NADPH and the inhibitors
Ying Liu et al.
Zhonghua xin xue guan bing za zhi, 37(6), 548-553 (2009-11-26)
To explore the feasibility of single photon emission computed tomography (SPECT) detection of heart reporter gene expression and observed the optimal transfecting titer and imaging time by using herpes simplex virus 1-thymidine kinase (HSV1-tk) as reporter gene and 131I-2'-fluoro-2'-deoxy-1-beta-D-arabinofuranosyl-5-iodouracil (131I-FIAU)
D L Wong et al.
Nucleic acids research, 26(2), 645-649 (1998-02-28)
We describe a novel strategy combining photocrosslinking and HPLC-based electrospray ionization mass spectrometry to identify UV crosslinked DNA-protein complexes. Eco RI DNA methyltransferase modifies the second adenine within the recognition sequence GAATTC. Substitution of 5-iodouracil for the thymine adjacent to
M C Willis et al.
Science (New York, N.Y.), 262(5137), 1255-1257 (1993-11-19)
5-Iodouracil-substituted RNA and DNA were crosslinked regiospecifically to associated proteins in yields of 70 to 94% of bound nucleic acid. Irradiation of the iodouracil chromophore with monochromatic, long-wavelength ultraviolet radiation (325 nanometers) eliminates excitation of other nucleic acid and protein
Yan Xu et al.
Journal of the American Chemical Society, 126(20), 6274-6279 (2004-05-20)
To explore the structure-dependent hydrogen abstraction in antiparallel and parallel G-quartet DNA structures, the photochemical reactivity of 5-iodouracil ((I)U)-containing human telomeric DNA 22-mers was investigated under the 302 nm UV irradiation conditions. We discovered that only antiparallel ODN 4, in
Santanu Mondal et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 25(7), 1773-1780 (2018-11-07)
Halogenated nucleosides, such as 5-iodo-2'-deoxyuridine and 5-iodo-2'-deoxycytidine, are incorporated into the DNA of replicating cells to facilitate DNA single-strand breaks and intra- or interstrand crosslinks upon UV irradiation. In this work, it is shown that the naphthyl-based organoselenium compounds can
Supaluk Prachayasittikul et al.
Molecules (Basel, Switzerland), 14(8), 2768-2779 (2009-08-25)
This study reports the synthesis of some substituted 5-iodouracils and their bioactivities. Alkylation of 5-iodouracils gave predominately N1-substituted-(R)-5-iodouracil compounds 7a-d (R = n-C(4)H(9), s-C(4)H(9), CH(2)C(6)H(11), CH(2)C(6)H(5)) together with N1,N3-disubstituted (R) analogs 8a-b (R = n-C(4)H(9), CH(2)C(6)H(11)). Their antimicrobial activity was
E Ferrer et al.
Bioconjugate chemistry, 8(5), 757-761 (1997-11-05)
The behavior of oligonucleotides containing 5-iodouracil, 5-bromocytidine, and 5-iodocytidine in concentrated ammonia is described. 5-Aminouracil and 5-aminocytidine are obtained as side products when deprotection is performed at 60 degrees C. Small amounts, if any, of side products are obtained when
K Q Liu et al.
The Journal of experimental medicine, 187(10), 1721-1727 (1998-06-13)
Itk, a Tec family tyrosine kinase, plays an important but as yet undefined role in T cell receptor (TCR) signaling. Here we show that T cells from Itk-deficient mice have a TCR-proximal signaling defect, resulting in defective interleukin 2 secretion.
Gaurav Garg et al.
Bioorganic & medicinal chemistry, 24(8), 1771-1777 (2016-03-19)
In vitro anti-mycobacterial activities of novel 4-amino-5-alkynylpyrimidine-2(1H)-ones were investigated. 4-Amino-5-heptynylpyrimidine-2(1H)-one (3) and 4-amino-5-(2-phenylethynyl)pyrimidine-2(1H)-one (7) displayed potent in vitro activity against Mycobacterium bovis and Mycobacterium tuberculosis. Compounds 3 and 7 were also assessed for their in vivo activity in BALB/c mice
T Oyoshi et al.
Nucleic acids symposium series, (42)(42), 171-172 (2000-04-26)
X-ray structure of DNA-Sso7d complex indicated that binding of this protein causes sharp DNA bending. In order to examine whether this protein also causes DNA bending in solution, photoreactions of 1U-substituted DNA in the presence and the absence of Sso7d
A Jeltsch et al.
Journal of molecular biology, 285(3), 1121-1130 (1999-01-27)
DNA methyltransferases flip their target base out of the DNA helix. Here, we have investigated base flipping by wild-type EcoRV DNA methyltransferase (M.EcoRV) and five M.EcoRV variants (D193A, Y196A, S229A, W231R and Y258A). These variants bind to DNA and S-adenosylmethionine
H Sugiyama et al.
Nucleic acids symposium series, (27)(27), 7-8 (1992-01-01)
To investigate photochemistry of 5-iodouracil (IU) in DNA, photoreaction of IU-containing oligonucleotides was examined. It was found that d(GCAIU G C) 2 undergoes selective photochemical C1' and C2' oxidation at the 5' side of IU residue to provide ribonolactone-containing hexamer
N Belotto et al.
Journal of chromatography, 572(1-2), 327-332 (1991-12-06)
A new assay is described for 2'-deoxy-5-iodouridine, a drug employed as an antiviral agent by topical application. The parent drug, its systemic metabolite 5-iodouracil and an internal standard (5-iodouridine) were extracted from salted serum by an ethyl acetate partition at
Eirini Mitsiki et al.
Biochemical and biophysical research communications, 386(4), 666-670 (2009-06-27)
Thymidine phosphorylase (TP) first identified as platelet derived endothelial cell growth factor (PD-ECGF) plays a key role in nucleoside metabolism. Human TP (hTP) is implicated in angiogenesis and is overexpressed in several solid tumors. Here, we report the crystal structures
J D Robertson et al.
Pharmaceutical research, 9(11), 1410-1414 (1992-11-01)
X-ray fluorescence (XRF) has been used to determine in vivo the percutaneous absorption of 5-iodouracil (5IU) in dimethyl sulfoxide (DMSO) on female Sprague-Dawley rats. An average absorption rate constant of 122 +/- 34 micrograms/cm2-hr was obtained from the XRF measurements
K Kawai et al.
Nucleic acids symposium series, (37)(37), 93-94 (1997-01-01)
Photoreactions of IU-containing Z-form DNA were investigated. By introducing 8-methylguanine, stable Z-form IU-containing oligonucleotides were prepared. DNA conformational change from B to Z leads to the remarkable acceleration of the photoreactivity of IU-containing oligonucleotides. In particular 2'-hydrogen abstraction was observed
T Ueda et al.
Nucleic acids symposium series, (37)(37), 95-96 (1997-01-01)
Polarized Raman scattering measurements have been made of a single crystal of 5-iodouracil by the use of a Raman microscope with the 488.0 nm excitation. The crystal belongs to space group P2(1) (monoclinic), and Raman scattering intensities, corresponding to the
Takanori Oyoshi et al.
Journal of the American Chemical Society, 124(10), 2086-2087 (2002-03-07)
Photoirradiation of 5-iodouracil-containing DNA, d(GTAAT(I)UAC)(2) with Sso7d protein, possessing significant kink in DNA in the crystal structure induces an unprecedented intrastrand H abstraction at the methyl group of T(5), together with selective photooxidations at Met29 of Sso7d. The reactivity of
Jesse J Chen et al.
PloS one, 4(3), e4949-e4949 (2009-03-24)
Glycerol nucleic acid (GNA) has an acyclic phosphoglycerol backbone repeat-unit, but forms stable duplexes based on Watson-Crick base-pairing. Because of its structural simplicity, GNA is of particular interest with respect to the possibility of evolving functional polymers by in vitro
R O Rahn
Photochemistry and photobiology, 56(1), 9-15 (1992-07-01)
The feasibility of using direct iodide (I-) measurements to monitor the photochemistry of the halogenated pyrimidines 5-iodocytosine and 5-iodouracil and their corresponding deoxynucleosides was examined. Radiation from either a germicidal lamp (lambda = 254 nm) or a sunlamp (lambda greater
Xiaorong Sun et al.
Oncotarget, 6(33), 34732-34744 (2015-09-30)
Bortezomib, a novel proteasome inhibitor, has been approved for treating multiple myeloma and mantle cell lymphoma and studied pre-clinically and clinically for solid tumors. Preferential cytotoxicity of bortezomib was found toward hypoxic tumor cells and endothelial cells in vitro. The
Hiren Banerjee et al.
Methods in molecular biology (Clifton, N.J.), 488, 181-190 (2008-11-05)
A large number of proteins contain multiple RNA recognition motifs (RRMs). How multiple RRMs contribute to RNA recognition in solution is, however, poorly understood. Here, we describe a simple biochemical approach called CLAMP (crosslinking and mapping of protein domain) to
Jin Woo Kim et al.
Nucleosides, nucleotides & nucleic acids, 25(8), 879-887 (2006-08-12)
In these study, novel acyclic (E)-bromovinyl nucleosides were synthesized as potential antiviral agents. The coupling of the allylic bromide 9 with bases (thymine, uracil, 5-fluorouracil, 5-iodouracil, cytosine, adenine) afforded a series of novel acyclic nucleosides. The synthesized compounds were evaluated
Carina Hernandez et al.
Cell chemical biology, 24(11), 1401-1406 (2017-10-11)
There is an increasing appreciation for structural diversity of DNA that is of interest to both DNA nanotechnology and basic biology. Here, we have explored how DNA responds to torsional stress by building on a previously reported two-turn DNA tensegrity
S Sastry et al.
Biochemistry, 38(16), 4972-4981 (1999-04-23)
Transcription is the fundamental process by which RNA is synthesized by RNA polymerases on double-stranded DNA templates. One structurally simple RNA polymerase is encoded by bacteriophage T7. T7 RNA polymerase is an excellent candidate for studying structural aspects of transcription
Abul K Mallik et al.
Analytical and bioanalytical chemistry, 406(19), 4585-4593 (2014-05-27)
A new hydrophilic and nonionic poly(2-vinyloxazoline)-grafted silica (Sil-VOX(n)) phase was synthesized and applied for the separation of nucleosides and nucleobases in hydrophilic interaction chromatography (HILIC). Polymerization and immobilization onto silica were confirmed by using characterization techniques including (1)H NMR spectroscopy
T Oyoshi et al.
Nucleic acids research. Supplement (2001), (1)(1), 123-124 (2003-07-03)
It is revealed that double-strand RNA adenosine deaminase 1 binds to Z-DNA and NH2-terminus Z alpha domain is responsible for the high affinity binding. In order to investigate the structure of Z-DNA induced by Z alpha, the photoreactions of 5-halouracil-containing
Yan Xu et al.
Nucleic acids research. Supplement (2001), (3)(3), 71-72 (2003-09-27)
The photoreaction of 5-iodouracil-((I)U)-containing telomeric oligonucleotides in parallel or antiparallel structures, generated in the presence of K+ or Na+ ions, was investigated. It was found that the photoreactivity of telomeric DNA depends on the differences in the quadruplex conformations in
Kazuo Tanaka et al.
Nucleic acids symposium series (2004), (50)(50), 127-128 (2006-12-08)
Indium(0) is known to work as a good one-electron reductant with a small first ionization potential. Additionally, this metal is very stable in aqueous media. Therefore, indium has a bright prospect of developing a new method for the site-selective reduction
1/2