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Shardulendra P Sherchand et al.
Proceedings of the National Academy of Sciences of the United States of America, 116(25), 12468-12477 (2019-05-18)
A striking difference between genital and ocular clinical isolates of Chlamydia trachomatis is that only the former express a functional tryptophan synthase and therefore can synthesize tryptophan by indole salvage. Ocular isolates uniformly cannot use indole due to inactivating mutations
Masaaki Fujikawa et al.
Bioorganic & medicinal chemistry, 15(11), 3756-3767 (2007-04-10)
We previously reported a classical quantitative structure-activity relationship (QSAR) equation for permeability coefficients (P(app-pampa)) by parallel artificial membrane permeation assay (PAMPA) of structurally diverse compounds with simple physicochemical parameters, hydrophobicity at a particular pH (logP(oct) and |pK(a)-pH|), hydrogen-accepting ability (SA(HA))
R Hardeland et al.
Advances in experimental medicine and biology, 467, 389-395 (2000-03-18)
Chemiluminescence associated with oxidation by free radicals was investigated in an alkaline, hemin-catalysed hydrogen peroxide system, using the following tryptophan metabolites as radical scavengers: indole-3-pyruvic, indole-3-propionic, kynurenic, xanthurenic and quinaldic acids and 4-hydroxy-quinoline. Light emission from oxidation of the indolic
M Karbownik et al.
Journal of bioenergetics and biomembranes, 33(1), 73-78 (2001-07-20)
Chromium (Cr) is a well established carcinogen, with Cr(III) accounting for much of the intracellular oxidative damage that this transition metal induces. Indole-3-propionic acid (IPA), a melatonin-related molecule, is a reported antioxidant and free radical scavenger. Concentration (1, 10, 100
B Poeggeler et al.
Brain research, 815(2), 382-388 (1999-01-08)
The hydroxyl radical scavenging activity of indole-3-propionate was evaluated by kinetic competition studies with the hydroxyl radical trapping reagent 2,2'-azino-bis-(3-ethyl-benz-thiazoline-6-sulfonic acid) (ABTS) and by measuring hydroxyl radical-initiated lipid peroxidation in the rat striatum. Using ABTS, the indole was shown to
Andrew W Woodward et al.
Plant physiology, 144(2), 976-987 (2007-04-24)
The ubiquitin-like protein RELATED TO UBIQUITIN (RUB) is conjugated to CULLIN (CUL) proteins to modulate the activity of Skp1-Cullin-F-box (SCF) ubiquitylation complexes. RUB conjugation to specific target proteins is necessary for the development of many organisms, including Arabidopsis (Arabidopsis thaliana).
M Karbownik et al.
Journal of cellular biochemistry, 81(3), 507-513 (2001-03-20)
Excessive free iron and the associated oxidative damage are commonly related to carcinogenesis. Among the antioxidants known to protect against iron-induced oxidative abuse and carcinogenesis, melatonin and other indole compounds recently have received considerable attention. Indole-3-propionic acid (IPA), a deamination
Małgorzata Karbownik et al.
Cell biochemistry and function, 24(6), 483-489 (2006-01-07)
Potassium bromate (KBrO(3)) is classified as a carcinogenic agent. KBrO(3) induces tumors and pro-oxidative effects in kidneys. Melatonin is a well known antioxidant and free radical scavenger. Indole-3-propionic acid (IPA), an indole substance, also reveals antioxidative properties. Recently, some antioxidative
Emeline L Maillet et al.
Journal of medicinal chemistry, 52(21), 6931-6935 (2009-10-13)
We show that phenoxyauxin herbicides and lipid-lowering fibrates inhibit human but not rodent T1R3. T1R3 as a coreceptor in taste cells responds to sweet compounds and amino acids; in endocrine cells of gut and pancreas T1R3 contributes to glucose sensing.
Lihui Wang et al.
Journal of chromatography. A, 1368, 37-43 (2014-12-03)
A new material, graphene oxide/polypyrrole (GO/Ppy), was synthesized by mixing graphene oxide and polypyrrole in a specific proportion. It possesses a unique structure similar to that of foam. A homemade pipette-tip solid-phase extraction (PT-SPE) device, which is more simple and
Mahmoud Al-Majdoub et al.
Journal of molecular recognition : JMR, 27(9), 566-574 (2014-07-22)
The development and application of a miniaturized affinity system for the preparation and release of intact immune complexes are demonstrated. Antibodies were reversibly affinity-adsorbed on pipette tips containing protein G´ and protein A, respectively. Antigen proteins were digested with proteases
Burkhard Poeggeler et al.
PloS one, 5(4), e10206-e10206 (2010-04-28)
Aging is a multi-factorial process, however, it is generally accepted that reactive oxygen species (ROS) are significant contributors. Mitochondria are important players in the aging process because they produce most of the cellular ROS. Despite the strength of the free-radical
K L Borden et al.
European journal of biochemistry, 202(2), 459-470 (1991-12-05)
The antirepressor indole 3-propanoate has been shown by X-ray crystallography to bind in a different orientation compared with the natural corepressor for the tryp repressor, L-tryptophan (Lawson, C.L. & Sigler, P. B. (1988) Nature 333, 869-871). This suggests a simple
Yao Wang et al.
Journal of hazardous materials, 295, 9-16 (2015-04-13)
In the present study, the enantioselective metabolism, cytotoxicity of hexaconazole and its influence on tryptophan metabolism in rat hepatocytes in vitro were investigated. Following the exposure of primary rat hepatocytes to rac-hexaconazole, the concentrations of its enantiomers in the media
In Koo Hwang et al.
Journal of neuroscience research, 87(9), 2126-2137 (2009-02-25)
Tryptophan-derived indole compounds have been widely investigated as antioxidants and as free-radical scavengers. Indole-3-propionic acid (IPA), one of these compounds, is a deamination product of tryptophan. In the present study, we used Mongolian gerbils to investigate IPA's neuroprotective effects against
Qian Han et al.
Journal of medicinal chemistry, 52(9), 2786-2793 (2009-04-03)
Human kynurenine aminotransferase I (hKAT I) catalyzes the formation of kynurenic acid, a neuroactive compound. Here, we report three high-resolution crystal structures (1.50-1.55 A) of hKAT I that are in complex with glycerol and each of two inhibitors of hKAT
Fikadu G Tafesse et al.
PLoS pathogens, 11(10), e1005188-e1005188 (2015-10-03)
The ability of phagocytes to clear pathogens is an essential attribute of the innate immune response. The role of signaling lipid molecules such as phosphoinositides is well established, but the role of membrane sphingolipids in phagocytosis is largely unknown. Using
Stéphanie Ortial et al.
Journal of medicinal chemistry, 49(9), 2812-2820 (2006-04-28)
The use of classical antioxidants is limited by their low bioavailabilities, and therefore, high doses are usually required to display significant protective activity. In a recent article (J. Med. Chem. 2003, 46, 5230) we showed that the ability of the
Paul E Bendheim et al.
Journal of molecular neuroscience : MN, 19(1-2), 213-217 (2002-09-06)
The accumulation of amyloid-beta and concomitant oxidative stress are major pathogenic events in Alzheimer's disease. Indole-3-propionic acid (IPA, OXIGON) is a potent anti-oxidant devoid of pro-oxidant activity. IPA has been demonstrated to be an inhibitor of beta-amyloid fibril formation and
Qiaomei Lu et al.
Rapid communications in mass spectrometry : RCM, 22(16), 2565-2572 (2008-07-26)
Auxin is an important phylohormone, which regulates specific physiological responses such as division, elongation and differentiation of cells. A new method using liquid chromatography/electrospray ionization ion trap mass spectrometry (LC/ESI-ITMS) has been developed for identification and quantitation of four auxins.
E V Soniya et al.
Indian journal of experimental biology, 40(3), 329-333 (2003-03-15)
The effect of growth regulators and culture conditions on the morphogenetic response of cotyledonary leaf discs was studied in popular cucumber variety (Cucumis sativus cv. Sheetal). Organogenesis was induced directly without any intervening callus phase on Murashige and Skoog medium
H Ikushiro et al.
BioFactors (Oxford, England), 11(1-2), 97-99 (2000-03-08)
Tryptophanase is catalytically more competent in alkaline pH even though the coenzyme exists as an inactive aldamine structure in this pH region. The binding of a substrate analog, 3-indolepropionate to the enzyme shifts the equilibrium from the substituted aldamine to
Magdalena Stasiak et al.
Neuro endocrinology letters, 31(3), 363-369 (2010-07-01)
Potassium bromate (KBrO3) is a prooxidant and carcinogen. Melatonin is a highly effective antioxidant. Indole-3-propionic acid (IPA; indole substance) and propylothiouracil (PTU; antithyroid drug) reveal some antioxidative effects. The aim of the study was to evaluate KBrO3-induced lipid peroxidation (LPO)
M Kavanoor et al.
Biophysical chemistry, 66(1), 43-55 (1997-05-21)
The pH dependence of the association of apo trp repressor with the series of ligands, tryptophan, tryptamine, indole propionic acid (IPA), and trans-beta-indole acrylic acid (IAA), has been studied using fluorescence titrations and isothermal titration microcalorimetry (ITC). The purpose of
F Mandelbaum-Shavit et al.
Antimicrobial agents and chemotherapy, 35(12), 2526-2530 (1991-12-01)
Indole-3-propionic acid (IPA), a phytohormone derivative, is a potent inhibitor of growth of Legionella pneumophila cultivated extracellularly in a chemically defined hypotonic medium and intracellularly in human monocytes. The inhibitory activity turns into bactericidal activity with increasing concentrations. The susceptibility
Bernd Kuhn et al.
Bioorganic & medicinal chemistry letters, 16(15), 4016-4020 (2006-06-02)
In the quest for novel PPARalpha/gamma co-agonists as putative drugs for the treatment of type 2 diabetes and dyslipidemia, we have used a structure-based design approach to identify propionic acids with a 1,5-disubstituted indole scaffold as potent PPARalpha/gamma activators. Compounds
Shan Wu et al.
Plant science : an international journal of experimental plant biology, 238, 95-104 (2015-08-11)
Within the cultivated tomato germplasm, sun, ovate and fs8.1 are the three predominant QTLs controlling fruit elongation. Although SUN and OVATE have been cloned, their role in plant growth and development are not well understood. To compare and contrast the
Stephen E Reichenbach et al.
Journal of separation science, 33(10), 1365-1374 (2010-04-17)
Comprehensive two-dimensional LC (LC x LC) is a powerful tool for analysis of complex biological samples. With its multidimensional separation power and increased peak capacity, LC x LC generates information-rich, but complex, chromatograms, which require advanced data analysis to produce
Zhongqi Cheng et al.
Environmental science & technology, 39(19), 7662-7666 (2005-10-26)
Field and laboratory experiments were conducted to study the potential use of Fe filings to remove monomethyl arsenate (MMA) and dimethyl arsenate (DMA) from contaminated waters. Batch experiments show that the affinity of MMAfor Fe filings is comparable to that
W Qi et al.
Journal of pineal research, 29(1), 54-61 (2000-08-19)
Chromium (Cr) compounds are known occupational and environmental carcinogens. This trace element is found in the workplace primarily in the valence forms Cr(III) and Cr(VI). Cr(III), which was thought originally to be relatively nontoxic, was recently found to be more
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