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Sammeta V Raju et al.
PloS one, 7(3), e32112-e32112 (2012-03-24)
Alcohol abuse is associated with increased lung infections. Molecular understanding of the underlying mechanisms is not complete. Airway epithelial ion transport regulates the homeostasis of airway surface liquid, essential for airway mucosal immunity and lung host defense. Here, air-liquid interface
Allen M Orville et al.
Biochemistry, 48(4), 720-728 (2009-01-13)
Flavin C4a-OO(H) and C4a-OH adducts are critical intermediates proposed in many flavoenzyme reaction mechanisms, but they are rarely detected even by rapid transient kinetics methods. We observe a trapped flavin C4a-OH or C4a-OO(H) adduct by single-crystal spectroscopic methods and in
Fei Bei et al.
Gene, 524(2), 396-400 (2013-04-17)
Isovaleric acidemia (IVA) is a rare inherited metabolic disease caused by a deficiency in isovaleryl-CoA dehydrogenase (IVD). Newborn screening with tandem mass spectrometry leads to early identification of individuals with risk of IVA. The family specific mutations are useful for
Benjamin Rieff et al.
Photochemistry and photobiology, 87(3), 511-523 (2010-12-01)
The photophysics and photochemistry of flavin dyes determine the functional dynamics of a series of blue light photoreceptors that include the so-called BLUF (blue light sensors using flavin) domains. To enable molecular dynamics (MD) simulation studies of such signaling processes
Dovenia S Ponnoth et al.
American journal of physiology. Heart and circulatory physiology, 297(5), H1655-H1660 (2009-09-15)
Adenosine mediates vascular responses through four receptor subtypes: A(1), A(2A), A(2B), and A(3). The role of A(2A) receptors in aortic vascular tone was investigated using A(2A) adenosine receptor (AR) knockout (A(2A)KO) and corresponding wild-type (A(2A)WT) mice. Isolated aortic rings from
Tzong-Yuan Lin et al.
The Journal of biological chemistry, 287(45), 38338-38346 (2012-09-21)
The three-component toluene dioxygenase system consists of an FAD-containing reductase, a Rieske-type [2Fe-2S] ferredoxin, and a Rieske-type dioxygenase. The task of the FAD-containing reductase is to shuttle electrons from NADH to the ferredoxin, a reaction the enzyme has to catalyze
Limor Radoszkowicz et al.
Physical chemistry chemical physics : PCCP, 13(25), 12058-12066 (2011-06-01)
Time-resolved fluorescence decay of flavin adenine dinucleotide (FAD) was studied at room temperature in water and water-methanol mixtures by a fluorescence upconversion technique. The observations were focused on the most initial decay phase (200 ps), before the residual fluorescence assumes
Amanda B Witte et al.
Biomacromolecules, 13(2), 507-516 (2011-12-24)
The present study describes the biophysical characterization of generation-five poly(amidoamine) (PAMAM) dendrimers conjugated with riboflavin (RF) as a cancer-targeting platform. Two new series of dendrimers were designed, each presenting the riboflavin ligand attached at a different site (isoalloxazine at N-3
Zachary C Berwick et al.
Microcirculation (New York, N.Y. : 1994), 17(8), 600-607 (2010-11-04)
This study was designed to elucidate the contribution of adenosine A(2A) and A(2B) receptors to coronary reactive hyperemia and downstream K(+) channels involved. Coronary blood flow was measured in open-chest anesthetized dogs. Adenosine dose-dependently increased coronary flow from 0.72 ±
Haoran Yu et al.
Virology, 521, 1-19 (2018-06-05)
Adenosine plays an important role in cell death and differentiation as well as in tumorigenesis and the intra- and extra-cellular levels range from nanomolar to millimolar levels under various physiological or pathophysiological conditions. Here we report that adenosine can activate
Viktor Mojr et al.
Organic & biomolecular chemistry, 9(21), 7318-7326 (2011-09-01)
Four structurally different alloxazine-cyclodextrin conjugates were prepared and tested as catalysts for the enantioselective oxidation of prochiral sulfides to sulfoxides by hydrogen peroxide in aqueous solutions. The alloxazinium unit was appended to the primary face of α- and β-cyclodextrins via
Stephanie Schaefer-Ramadan et al.
Biochemistry, 52(46), 8323-8332 (2013-10-24)
Augmenter of liver regeneration is a member of the ERV family of small flavin-dependent sulfhydryl oxidases that contain a redox-active CxxC disulfide bond in redox communication with the isoalloxazine ring of bound FAD. These enzymes catalyze the oxidation of thiol
Burki Rajendar et al.
Organic & biomolecular chemistry, 8(21), 4949-4959 (2010-09-08)
Using the DNA duplex containing an AP site (5'-TCC AGX GCA AC-3'/3'-AGG TCN CGT TG-5', X = AP site, N = A, T, C, or G), we have found that 2-amino-4-hydroxypteridine (pterin) selectively binds to guanine (G), and that the
Achuthan C Raghavamenon et al.
Toxicology mechanisms and methods, 19(8), 498-502 (2009-10-13)
A fluorometric, reversed-phase high-performance liquid chromatography (RP-HPLC) method that allows quantitation of low levels of alloxan has been described. The method involved derivatization of alloxan with 500-200,000-fold excess of 1, 2-phenylenediamine (PD) in 0.1 M acetate buffer, pH 4.5 for
Lorena Valle et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 11(6), 1051-1061 (2012-03-22)
The singlet and triplet excited states properties of lumiflavin (LF), riboflavin (RF), flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) in reversed micelles (RM) of sodium docusate (AOT) in n-hexane solutions were evaluated as a function of the water to
Tae-Kyung Lee et al.
Journal of cardiovascular pharmacology, 53(2), 167-172 (2009-02-04)
Previous reports have suggested that the posterior hypothalamic adenosine A2 receptors may play a role in central cardiovascular regulation. In this study, we examined the influence of posterior hypothalamic adenosine A2B receptors on the regulation of blood pressure and heart
Dorota Prukała et al.
Rapid communications in mass spectrometry : RCM, 23(5), 619-628 (2009-01-24)
The fragmentation pathways in electron ionization (EI) mass spectra of a series of new N(5)-oxides of alloxazines and iso-alloxazine are presented, and compared with those of substituted alloxazines and iso-alloxazine. The EI mass spectra of these compounds showed characteristic fragmentation
Masahide Hikita et al.
Biochemistry, 52(1), 98-104 (2012-12-12)
A highly improved method for obtaining resonance Raman (RR) spectra provided spectra comparable to the best known flavoprotein spectra when the method was tested using bovine heart NADH:ubiquinone oxidoreductase (Complex I), a protein with a molecular mass of 1000 kDa
Junlong Dang et al.
Journal of autoimmunity, 113, 102491-102491 (2020-06-23)
Cell specific and cytokine targeted therapeutics have underperformed in systemic lupus erythematosus (SLE). Mesenchymal stem cells (MSCs) have emerged as a novel therapy to address the dysregulation in autoimmune diseases but also have limitations. Human gingiva derived MSCs (GMSCs) are
Yu Xin et al.
Journal of separation science, 34(21), 2940-2949 (2011-09-22)
Affinity ligands for flavoenzymes were synthesized based on the natural structure of flavo-coenzymes. Two typical flavoenzymes, cholesterol oxidase from Brevibacterium sp. and xanthine oxidase from bovine milk, were employed as standard enzymes. Fluorescent probes were synthesized from eight isoalloxazine-like chemicals
Determination of mutated genes in the presence of wild-type DNA by using molecular beacons as probe.
Yonghua Zhang et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 174, 286-290 (2016-12-14)
Low-abundance mutations in the presence of wild-type DNA can be determined using molecular beacon (MB) as probe. A MB is generally used as DNA probe because it can distinguish single-base mismatched target DNA from fully matched target DNA. However, the
Hideaki Takahashi et al.
The Journal of chemical physics, 129(20), 205103-205103 (2008-12-03)
The isoalloxazine ring (flavin ring) is a part of the coenzyme flavin adenine dinucleotide and acts as an active site in the oxidation of a substrate. We have computed the free energy change Deltamicro(red) associated with one-electron reduction of the
Isaias Lans et al.
Biochimica et biophysica acta, 1817(12), 2118-2127 (2012-09-18)
The chemical versatility of flavin cofactors within the flavoprotein environment allows them to play main roles in the bioenergetics of all type of organisms, particularly in energy transformation processes such as photosynthesis or oxidative phosphorylation. Despite the large diversity of
Fabian Offensperger et al.
Cell chemical biology, 27(12), 1510-1520 (2020-09-24)
Genetic aberrations of the UBE3A gene encoding the E3 ubiquitin ligase E6AP underlie the development of Angelman syndrome (AS). Approximately 10% of AS individuals harbor UBE3A genes with point mutations, frequently resulting in the expression of full-length E6AP variants with
Su Ma et al.
Microbial cell factories, 16(1), 37-37 (2017-03-02)
Cellobiose dehydrogenase (CDH) is an extracellular enzyme produced by lignocellulolytic fungi. cdh gene expression is high in cellulose containing media, but relatively low CDH concentrations are found in the supernatant of fungal cultures due to strong binding to cellulose. Therefore
Ernesto Mendoza-Torres et al.
Journal of molecular evolution, 88(3), 284-291 (2020-03-07)
On ancient Earth, environmental conditions favored prebiotic chemical reactions. In the Archean, some molecules with conjugated rings might have been synthesized, displaying structural stability in the Archean in the presence of ionizing radiation and hydration-dehydration events. Additionally, it is suggested
Yang Luo et al.
EBioMedicine, 43, 620-631 (2019-05-12)
Bone destruction is one of many severe complications that occurs in patients with rheumatoid arthritis (RA) and current therapies are unable to cure this manifestation. This study here aims to determine whether GMSC can directly inhibit osteoclast formation and eventually
Roselyn B Rose'Meyer
Clinical and experimental pharmacology & physiology, 37(1), 46-50 (2009-07-02)
1. The effect of the adenosine A(2) receptor (AdoA(2)R) agonist N(6)-[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)-ethyl]adenosine (DPMA) on adenosine A(1) receptor (AdoA(1)R)-mediated negative inotropic responses was investigated in rat heart. 2. Hearts from male Wistar rats (250-350 g) were perfused with Krebs'-Henseleit solution at constant
Yunejin Song et al.
World journal of stem cells, 12(9), 1032-1049 (2020-10-10)
Mesenchymal stem cells (MSCs) are an attractive tool to treat graft-versus-host disease because of their unique immunoregulatory properties. Although human bone marrow-derived MSCs (BM-MSCs) were the most widely used MSCs in cell therapy until recently, MSCs derived from human umbilical
Jesús I Martínez et al.
Journal of magnetic resonance (San Diego, Calif. : 1997), 218, 153-162 (2012-03-27)
A complete study of Anabaena flavodoxin in the neutral semiquinone state by means of the EPR pulse technique HYSCORE is here presented. The results provide new information about the hyperfine interactions of the unpaired electronic spin and the nuclei in
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