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M S Abu-Bakr
Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986), 58(3), 231-236 (1993-01-01)
The complexation equilibria of iron(III) with 3-hydroxypicolinic acid (hypa) have been studied spectrophotometrically in 40% (v/v) ethanol-water medium at 25 degrees C and an ionic strength of 0.1 M NaClO4. The equilibria occurring in solution were established and the basic
Indranil Sinha et al.
Angewandte Chemie (International ed. in English), 54(12), 3603-3606 (2015-01-30)
The first parallel-stranded DNA duplex with Hoogsteen base pairing that readily incorporates an Ag(+) ion into an internal mispair to form a metal-mediated base pair has been created. Towards this end, the highly stabilizing 6 FP-Ag(+)-6 FP base pair comprising the artificial
Chih-Chi Chu et al.
Chembiochem : a European journal of chemical biology, 15(13), 1905-1910 (2014-07-25)
We report DNA catalysts (deoxyribozymes) that join tyrosine-containing peptides to RNA and DNA in one step and without requiring protecting groups on either the peptide or the nucleic acid. Our previous efforts towards this goal required tethering the peptide to
B A Bruenner et al.
Rapid communications in mass spectrometry : RCM, 10(14), 1797-1801 (1996-01-01)
Quantitative aspects of oligonucleotide analysis by matrix-assisted laser desorption/ionization (MALDI) mass spectrometry remain largely unexplored relative to the efforts that have been devoted to quantitative peptide and protein analysis. The successful quantitation of these other biopolymers coupled with the potential
A V Streletskiĭ et al.
Bioorganicheskaia khimiia, 31(2), 151-158 (2005-05-14)
MALDI mass spectrometry (MS) of 14- to 42-mer homogeneous oligonucleotides and their mixtures was carried out using a Vision 2000 instrument (Thermo BioAnalysis, Finnigan, United States). Conditions for the determination of oligonucleotide molecular masses were optimized by applying various matrices
Y Kong et al.
Rapid communications in mass spectrometry : RCM, 15(1), 57-64 (2001-01-03)
The ionization of nucleosides in matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was systematically investigated using adenine (A), thymine (T), guanine (G) and cytosine (C) with several common matrices. Experimental results of the protonation and deprotonation of the bases of A
Samantha M Sarett et al.
Journal of biomedical materials research. Part A, 103(9), 3107-3116 (2015-02-03)
Clinical translation of siRNA therapeutics has been limited by the inability to effectively overcome the rigorous delivery barriers associated with intracellular-acting biologics. Here, to address both potency and longevity of siRNA gene silencing, pH-responsive micellar nanoparticle (NP) carriers loaded with
Misaki Nakai et al.
Journal of inorganic biochemistry, 98(1), 105-112 (2003-12-09)
Two chargeless VO(IV) complexes with 3-hydroxypyridine-2-carboxylic acid (H2hpic), [VO(Hhpic-O,O)(Hhpic-O,N)(H2O)].3H2O (1) and the cyclic tetramer [(VO)4(mu-(hpic-O,O',N))4(H2O)4].8H3O (2), have been synthesized and characterized by elemental analysis, mass, infrared, electronic absorption, electron spin resonance (ESR) spectroscopies, and X-ray crystallography. Their coordination structures are
E Nordhoff et al.
Nucleic acids research, 22(13), 2460-2465 (1994-07-11)
UV-matrix assisted laser desorption/ionization mass spectrometry (UV-MALDI-MS) with 3-hydroxypicolinic acid as matrix and IR-MALDI-MS with succinic acid as matrix have proved their feasibility for highly accurate and sensitive mass determination of nucleic acids (DNA and RNA). In this work, a
K Tang et al.
Rapid communications in mass spectrometry : RCM, 8(9), 673-677 (1994-09-01)
We found that picolinic acid is a very good matrix for matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry of oligonucleotides, proteins and tRNA. Among the oligonucleotides, picolinic acid was shown to be effective for homo-oligonucleotides, d(G)40 and d(C)60, and for
J M Koomen et al.
Journal of mass spectrometry : JMS, 35(8), 1025-1034 (2000-09-06)
The changes in the ion signals in the isotope cluster, mass resolution, signal-to-noise ratio and mass accuracy for matrix-assisted laser desorption/ionization (MALDI) of DNA oligonucleotides (dGGATC, dCAGCt, and dAACCGTT) and their fragment ions were evaluated, and these data were compared
Martin James Ross et al.
Dalton transactions (Cambridge, England : 2003), 44(48), 20972-20982 (2015-11-20)
Prior work has demonstrated the potential effectiveness of a new class of metallopeptides as catalytic metallodrugs that target HCV IRES SLIIb RNA (Cu-GGHYrFK, 1). Herein new catalytic metallodrugs (GGHKYKETDLLILFKDDYFAKKNEERK, 2; and GGHKYKETDL, 3) are described based on the LaR2C peptide
Switching on luminescence in nucleotide/lanthanide coordination nanoparticles via synergistic interactions with a cofactor ligand.
Carole Aimé et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 16(12), 3604-3607 (2010-03-02)
Shintaro Kodama et al.
Dalton transactions (Cambridge, England : 2003), (44)(44), 9708-9711 (2009-11-04)
Vanadium(iv) complexes bearing 3-hydroxypicolinic acid (H(2)hpic) as ligands, VO(Hhpic)(2) (1) and the cyclic tetramer (VO)(4)(hpic)(4) (2), have excellent catalytic ability for the oxidation of a variety of primary and secondary benzyl alcohols with molecular oxygen in acetonitrile or protic solvents
Weighing DNA for fast genetic diagnosis.
J Alper
Science (New York, N.Y.), 279(5359), 2044-2045 (1998-04-16)
K J Wu et al.
Rapid communications in mass spectrometry : RCM, 7(2), 142-146 (1993-02-01)
Matrix-assisted laser desorption time-of-flight mass spectrometry has been used to produce quasi-molecular ion signals from underivatized mixed-base single-stranded DNA oligomers ranging from 10 to 67 nucleotides in length. These results were obtained with a new matrix material, 3-hydroxypicolinic acid (3-hydroxypyridine-2-carboxylic
Krešimir Furić et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 101, 273-282 (2012-10-30)
Two cobalt(II) complexes with 3-hydroxypicolinic acid (3-hydroxypyridine-2-carboxylic acid, 3-OHpicH), trans-[Co(3-OHpic)2(py)2] (2) and cis-[Co(3-OHpic)2(4-pic)2] (3) (py=pyridine; 4-pic=4-picoline or 4-methylpyridine), previously synthesized and characterized by X-ray diffraction, are here studied by Raman and mid-infrared spectroscopy with the help from the corresponding DFT
Karolyn Barker et al.
Journal of biomaterials science. Polymer edition, 27(1), 22-39 (2015-11-07)
Significant research has focused on investigating the potential of hydrogels in various applications and, in particular, in medicine. Specifically, hydrogels that are biodegradable lend promise to many therapeutic and biosensing applications. Endonucleases are critical for mechanisms of DNA repair. However
Maria Heinrich et al.
European journal of mass spectrometry (Chichester, England), 14(6), 401-409 (2009-01-13)
Six different glycosyl esters of nucleoside pyrophosphates (monosaccharide nucleotides) were analyzed by means of matrix-assisted laser desorption/ionisation reflectron time-of-flight mass spectrometry (MALDI/RToF MS) in the negative ion mode. Several matrices were evaluated and 3-hydroxypicolinic acid as well as alpha-cyano-4- hydroxycinnamic
Wen-Hua Chiou et al.
The Journal of organic chemistry, 75(5), 1748-1751 (2010-02-09)
Facile syntheses of enantiopure trans- and cis-3-hydroxypiperidine derivatives and 3-hydroxypipecolic acids are reported, featuring Rh-catalyzed cyclohydrocarbonylation through common intermediates. A diaxial conformation in a 2,3-disubstituted N-Boc-piperidinyl structure is revealed by an X-ray crystallographic analysis.
K Curry et al.
Neuroscience letters, 66(1), 101-105 (1986-05-06)
The actions of acridinic acid (2,3-quinoline dicarboxylic acid), a new derivative of quinolinic acid, as an antagonist of amino acid-induced excitations are described. Acridinate, like kynurenate, in the cerebral cortex reduced the effects of all amino acids equally, but in
J Bai et al.
Rapid communications in mass spectrometry : RCM, 8(9), 687-691 (1994-09-01)
Matrix-assisted laser desorption/ionization using a 3-hydroxypicolinic acid matrix from an active Nafion substrate has been used for detection of restriction enzyme-digested double-stranded plasmid DNA using time-of-flight mass spectrometry. DNA strands of up to 267 base pairs were detected with minimal
Jennifer A Jacobsen et al.
Journal of medicinal chemistry, 54(2), 591-602 (2010-12-30)
Fragment-based lead design (FBLD) has been used to identify new metal-binding groups for metalloenzyme inhibitors. When screened at 1 mM, a chelator fragment library (CFL-1.1) of 96 compounds produced hit rates ranging from 29% to 43% for five matrix metalloproteases
Y Dai et al.
Rapid communications in mass spectrometry : RCM, 10(14), 1792-1796 (1996-01-01)
A method for accurate mass measurement of oligonucleotides up to a DNA 35-mer based on matrix-assisted laser desorption/ionization (MALDI) mass spectrometry is described. In this method, a time-lag focusing time-of-flight mass spectrometer is used to achieve high mass resolution to
Ningning Liang et al.
The Journal of organic chemistry, 70(24), 10182-10185 (2005-11-19)
[reaction: see text] 3-Hydroxypipecolic acid, a nonproteinogenic cyclic alpha-amino acid, is a common structural moiety found in a large number of natural and synthetic compounds of medicinal significance. Utilizing D-serine as a chiral template, the present research describes efficient and
Ewa Radzikowska et al.
Organic & biomolecular chemistry, 13(1), 269-276 (2014-11-05)
Chimeric oligonucleotides containing phosphodiester and phosphorothioate linkages have been obtained using the solid phase synthesis. The oligonucleotide parts possessing natural internucleotide phosphate bonds were assembled using commercially available nucleoside 3'-O-(2-cyanoethyl-N,N-diisopropylamino)phosphoramidites 7 whereas the phosphorothioate segment was built using nucleoside 3'-O-(2-thio-1,3,2-oxathiaphospholanes)
Saswata Karmakar et al.
Nature chemistry, 7(9), 752-758 (2015-08-21)
Formaldehyde is universally used to fix tissue specimens, where it forms hemiaminal and aminal adducts with biomolecules, hindering the ability to retrieve molecular information. Common methods for removing these adducts involve extended heating, which can cause extensive degradation of nucleic
Karel Waisser et al.
Archiv der Pharmazie, 336(6-7), 322-335 (2003-09-04)
A set of 40 derivatives of 3-hydroxypicolinic acid and 2-sulfanylbenzoic acid, isosteric to salicylanilides was synthesized. The compounds were evaluated for in vitro activity against Mycobacterium tuberculosis, Mycobacterium kansasii and Mycobacterium avium, Candida albicans, Candida tropicalis, Candida krusei, Candida glabrata
4-(2'-Pyridyl)imidazole as an artificial nucleobase in highly stabilizing Ag(I)-mediated base pairs.
Kristina Schweizer et al.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 20(5), 895-903 (2015-06-13)
A new artificial nucleoside 2 comprising 4-(2'-pyridyl)imidazole as the nucleobase was devised and incorporated into a series of DNA oligonucleotide duplexes. The propensity of 2 to form metal-mediated homo and hetero base pairs was investigated in various 13mer and 26mer
Lihua Zhou et al.
Rapid communications in mass spectrometry : RCM, 18(7), 787-794 (2004-03-31)
A mixed matrix of 3-hydroxypicolinic acid (3-HPA) and pyrazinecarboxylic acid (PCA) was used for analysis of a variety of synthetic oligodeoxynucleotides ranging in length from 8-108-mers by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The experimental results showed that DNA segments
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