PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 32254396-3 2018 The DA in the specimen would be specifically captured on the DBA-aptachip, then released from the DBA in alkaline solution to form DA-quinone (DAQ), thus leading to a color change (from colorless to brown) and inducing a dramatic decrease in the fluorescence intensity as a result of the photoinduced electron transfer (PET) for bovine serum albumin (BSA)-stabilized Au nanoclusters (BSA-Au NCs). dopamine quinone 131-141 albumin Bos taurus 336-349 31161325-5 2019 When DA-functionalized CuInS2/ZnS quantum dots were added to the sandwich system, TYR catalyzed the transformation of DA to dopamine quinone, which acted as an effective electron acceptor and triggered fluorescence quenching. dopamine quinone 124-140 tyrosinase Homo sapiens 82-85 30625605-3 2019 Dopamine quinone was produced by tyrosinase-mediated oxidation of dopamine on the surface of UCNPs, which acted as electron accepter to quench the FL emission of UCNPs. dopamine quinone 0-16 tyrosinase Homo sapiens 33-43 31432267-4 2019 The dopamine on the rQDs is catalytically oxidized by TYR to form dopamine quinone, and this leads to a reduction of the intensity of red fluorescence (peaking at 644 nm). dopamine quinone 66-82 tyrosinase Homo sapiens 54-57 30283922-3 2018 DA was easily oxidized to DA quinone under the catalysis of TYR by dissolved O2, which effectively quenched the fluorescence of the QDs. dopamine quinone 26-36 tyrosinase Homo sapiens 60-63 32254396-3 2018 The DA in the specimen would be specifically captured on the DBA-aptachip, then released from the DBA in alkaline solution to form DA-quinone (DAQ), thus leading to a color change (from colorless to brown) and inducing a dramatic decrease in the fluorescence intensity as a result of the photoinduced electron transfer (PET) for bovine serum albumin (BSA)-stabilized Au nanoclusters (BSA-Au NCs). dopamine quinone 143-146 albumin Bos taurus 336-349 26908040-7 2016 Tyrosinase, which catalyzes the oxidation of DA to DA quionone (DAQ), accelerated the inhibitory effect of DA on LPS-induced NO production. dopamine quinone 64-67 tyrosinase Mus musculus 0-10 27001148-4 2016 We previously demonstrated that mitochondrial Mic60 protein is susceptible to both covalent modification and loss in abundance following exposure to dopamine quinone. dopamine quinone 149-165 inner membrane mitochondrial protein Homo sapiens 46-51 24374372-10 2014 However, deleterious effects caused by PINK1 mutations may be alleviated by iron-chelating agents and antioxidant agents with DA quinone-conjugating capacity. dopamine quinone 126-136 PTEN induced kinase 1 Homo sapiens 39-44 23816523-7 2013 Exposing intact rat brain mitochondria to DAQ resulted in similar decreases in GPx4 activity and monomeric protein levels as well as detection of multiple forms of DA-conjugated GPx4 protein. dopamine quinone 42-45 glutathione peroxidase 4 Rattus norvegicus 79-83 23816523-5 2013 Here we report the findings of our studies on the effect of DA oxidation and DAQ on the mitochondrial antioxidant selenoprotein glutathione peroxidase 4 (GPx4). dopamine quinone 77-80 glutathione peroxidase 4 Rattus norvegicus 154-158 23816523-6 2013 Purified GPx4 could be covalently modified by DAQ, and the addition of DAQ to rat testes lysate resulted in dose-dependent decreases in GPx4 activity and monomeric protein levels. dopamine quinone 46-49 glutathione peroxidase 4 Rattus norvegicus 9-13 23816523-6 2013 Purified GPx4 could be covalently modified by DAQ, and the addition of DAQ to rat testes lysate resulted in dose-dependent decreases in GPx4 activity and monomeric protein levels. dopamine quinone 71-74 glutathione peroxidase 4 Rattus norvegicus 9-13 23816523-6 2013 Purified GPx4 could be covalently modified by DAQ, and the addition of DAQ to rat testes lysate resulted in dose-dependent decreases in GPx4 activity and monomeric protein levels. dopamine quinone 71-74 glutathione peroxidase 4 Rattus norvegicus 136-140 23816523-8 2013 Evidence of both GPx4 degradation and polymerization was observed following DAQ exposure. dopamine quinone 76-79 glutathione peroxidase 4 Rattus norvegicus 17-21 21540292-6 2011 In vitro experiments using purified enzymes showed that catecholamines inhibited CPE, PC1/3, and PC2, with dopamine quinone the most potent inhibitor (IC(50) values of ~50-500 muM); dopamine, norepinephrine, and epinephrine exhibited inhibition in the micromolar range. dopamine quinone 107-123 carboxypeptidase E Rattus norvegicus 81-84 22720719-6 2012 Specifically, good-quality signal of dopamine and its oxidized form, dopamine o-quinone, was obtained using 10 muL of 1 muM solution of dopamine on the IDA. dopamine quinone 69-87 latexin Homo sapiens 120-123 22431735-6 2012 We analyzed the structural modifications induced on human DJ-1 by DAQs in vitro. dopamine quinone 66-70 Parkinsonism associated deglycase Homo sapiens 58-62 22431735-7 2012 We described the structural perturbations induced by DAQ adduct formation on each of the three cysteine residues of DJ-1 using specific mutants. dopamine quinone 53-56 Parkinsonism associated deglycase Homo sapiens 116-120 21540292-6 2011 In vitro experiments using purified enzymes showed that catecholamines inhibited CPE, PC1/3, and PC2, with dopamine quinone the most potent inhibitor (IC(50) values of ~50-500 muM); dopamine, norepinephrine, and epinephrine exhibited inhibition in the micromolar range. dopamine quinone 107-123 proprotein convertase subtilisin/kexin type 2 Rattus norvegicus 97-100 21540292-7 2011 The inhibition of purified CPE with catecholamines was time-dependent and, for dopamine quinone, dilution-independent, suggesting covalent modification of the protein by the catecholamine. dopamine quinone 79-95 carboxypeptidase E Rattus norvegicus 27-30 20309679-6 2010 We propose on the basis of these and earlier data that oxidation of the four methionine residues at the C- and N-terminal ends of alpha-syn molecules prevents their end-to-end association and stabilises oligomers formed by cross linking with DA-quinone/DA-melanin, which are formed as a result of the redox process, thus inhibiting formation of the beta-sheet structure found in other pre-fibrillar forms of alpha-syn. dopamine quinone 242-252 synuclein alpha Homo sapiens 130-139 18226537-6 2008 Western blot analyses for mitochondrial creatine kinase and mitofilin confirmed significant losses in isolated brain mitochondria exposed to dopamine quinone and PC12 cells exposed to dopamine. dopamine quinone 141-157 inner membrane mitochondrial protein Rattus norvegicus 60-69 18455424-2 2008 Because oxidative stress caused by dopamine oxidation to dopamine quinone is suggested as a major factor contributing to the pathogenesis of PD, the induction of the enzyme that catalyzes the reduction of quinones, NAD(P)H quinone oxidoreductase1 (NQO1), could be a desirable therapeutic strategy to protect cells from oxidative damage. dopamine quinone 57-73 NAD(P)H quinone dehydrogenase 1 Rattus norvegicus 215-246 18455424-2 2008 Because oxidative stress caused by dopamine oxidation to dopamine quinone is suggested as a major factor contributing to the pathogenesis of PD, the induction of the enzyme that catalyzes the reduction of quinones, NAD(P)H quinone oxidoreductase1 (NQO1), could be a desirable therapeutic strategy to protect cells from oxidative damage. dopamine quinone 57-73 NAD(P)H quinone dehydrogenase 1 Rattus norvegicus 248-252 20226175-0 2010 Dopamine quinones interact with alpha-synuclein to form unstructured adducts. dopamine quinone 0-17 synuclein alpha Homo sapiens 32-47 17910954-2 2007 Here, we examined the effects of cysteine-rich metal-binding proteins, metallothionein (MT)-1 and -2, on DA quinone-induced neurotoxicity. dopamine quinone 105-115 metallothionein 1 Mus musculus 71-100 18022268-1 2008 The neurotoxicity of dopamine (DA) quinones as dopaminergic neuron-specific oxidative stress is considered to play a role in the pathogenesis and/or progression of Parkinson"s disease (PD), since DA quinones conjugate with several key PD pathogenic molecules (e.g., tyrosine hydroxylase, alpha-synuclein and parkin) to form protein-bound quinone (quinoprotein) and consequently inhibit their functions. dopamine quinone 196-207 synuclein, alpha Mus musculus 288-303 17394461-7 2007 Dopamine-induced Nrf2 activity in both cell types by generating oxidative stressors, H2O2 and dopamine-quinones. dopamine quinone 94-111 nuclear factor, erythroid derived 2, like 2 Mus musculus 17-21 16403784-6 2006 We also showed the protective effect of tyrosinase, which rapidly oxidizes DA and DA quinone to form stable melanin, against METH-induced dopaminergic neurotoxicity in vitro and in vivo using tyrosinase null mice. dopamine quinone 82-92 tyrosinase Mus musculus 40-50 16978807-1 2006 NAD(P)H quinone oxidoreductase 1 (NQO1) can metabolize dopamine-derived quinones (DAQ) and absence of NQO1 due to the NQO1*2 polymorphism has been suggested to be a risk factor for Parkinson"s disease. dopamine quinone 82-85 NAD(P)H quinone dehydrogenase 1 Homo sapiens 0-32 16978807-1 2006 NAD(P)H quinone oxidoreductase 1 (NQO1) can metabolize dopamine-derived quinones (DAQ) and absence of NQO1 due to the NQO1*2 polymorphism has been suggested to be a risk factor for Parkinson"s disease. dopamine quinone 82-85 NAD(P)H quinone dehydrogenase 1 Homo sapiens 34-38 16403784-2 2006 In the present study, we examined DA quinone formation in methamphetamine (METH)-induced dopaminergic neuronal cell death using METH-treated dopaminergic cultured CATH.a cells and METH-injected mouse brain. dopamine quinone 34-44 cathepsin H Mus musculus 163-167 8405659-2 1993 The oxidation of 3,4-dihydroxyphenylethylamine (dopamine) by O2 catalyzed by tyrosinase yields 4-(2-aminoethyl)-1,2-benzoquinone, with its amino group protonated (o-dopaminequinone-H+), which evolves non-enzymatically through two branches or sequences of reactions, whose respective operations are determined by the pH of the medium. dopamine quinone 95-128 tyrosinase Homo sapiens 77-87 15718289-12 2005 Instead, the peroxidase activity associated with COX-2, which can lead to the formation of reactive oxygen species and dopamine quinones, can account for its role. dopamine quinone 119-136 prostaglandin-endoperoxide synthase 2 Mus musculus 49-54 15312971-3 2004 In this respect, the inducible flavoprotein NAD(P)H:quinone oxidoreductase (NQO1) is of particular interest as it is directly implicated in the detoxication of DA-quinones and, in addition, has broad spectrum anti-oxidant properties. dopamine quinone 160-171 crystallin zeta Homo sapiens 52-74 15312971-3 2004 In this respect, the inducible flavoprotein NAD(P)H:quinone oxidoreductase (NQO1) is of particular interest as it is directly implicated in the detoxication of DA-quinones and, in addition, has broad spectrum anti-oxidant properties. dopamine quinone 160-171 NAD(P)H quinone dehydrogenase 1 Homo sapiens 76-80 12835121-6 2003 For example, the formation of DA quinone-alpha-synuclein consequently increases cytotoxic protofibrils and the covalent modification of tyrosine hydroxylase by DA quinones. dopamine quinone 30-40 synuclein alpha Homo sapiens 41-56 12835121-6 2003 For example, the formation of DA quinone-alpha-synuclein consequently increases cytotoxic protofibrils and the covalent modification of tyrosine hydroxylase by DA quinones. dopamine quinone 160-171 synuclein alpha Homo sapiens 41-56 15462376-7 2004 For example, the formation of DA quinone-alpha-synuclein complex consequently increases cytotoxic protofibrils and covalent modification of functional enzymes. dopamine quinone 30-40 synuclein alpha Homo sapiens 41-56 11181843-4 2001 DAQ reactivity was inferred from its effects on the binding of [(3)H]2-beta-carbomethoxy-3-beta-(4-fluorophenyl)tropane (beta-CFT) to hDAT cysteine mutant constructs. dopamine quinone 0-3 solute carrier family 6 member 3 Homo sapiens 134-138 9843160-5 1998 The present studies demonstrated that dopamine quinone, the formation of which was enhanced through the activity of the melanin biosynthetic enzyme, tyrosinase, covalently modified and inactivated tyrosine hydroxylase. dopamine quinone 38-54 tyrosinase Homo sapiens 149-159 9659366-0 1998 Metabolic activation of dopamine o-quinones to o-semiquinones by NADPH cytochrome P450 reductase may play an important role in oxidative stress and apoptotic effects. dopamine quinone 24-43 cytochrome p450 oxidoreductase Homo sapiens 65-96 9659366-1 1998 In this study, it is shown that considerable evidence for the possible pathway by which dopamine o-quinone, o-quinone and aminochrome can be activated metabolically by NADPH cytochrome P450 reductase to high reactive semiquinones. dopamine quinone 88-106 cytochrome p450 oxidoreductase Homo sapiens 168-199 8915597-3 1996 The conversion of dopamine to reactive dopamine quinone is accelerated by the enzyme tyrosinase. dopamine quinone 39-55 tyrosinase Homo sapiens 85-95 22723845-6 2012 Using radioactive DA, we demonstrated that SOD2 is a target of DAQs. dopamine quinone 63-67 superoxide dismutase 2 Homo sapiens 43-47 1910309-1 1991 The oxidation of 3,4-dihydroxyphenylethylamine (dopamine) by O2 catalyzed by tyrosinase yields 4-(2-aminoethyl)-1, 2-benzoquinone (o-dopaminequinone), which evolves nonenzymatically through two branches or sequences of reactions, whose respective operations are determined by the pH of the medium. dopamine quinone 95-129 tyrosinase Homo sapiens 77-87 22723845-7 2012 Exposure to micromolar DAQ concentrations induces a loss of up to 50% of SOD2 enzymatic activity in a dose-dependent manner, which is correlated to the concomitant formation of protein aggregates, while the coordination geometry of the active site appears unaffected by DAQ modifications. dopamine quinone 23-26 superoxide dismutase 2 Homo sapiens 73-77 22723845-7 2012 Exposure to micromolar DAQ concentrations induces a loss of up to 50% of SOD2 enzymatic activity in a dose-dependent manner, which is correlated to the concomitant formation of protein aggregates, while the coordination geometry of the active site appears unaffected by DAQ modifications. dopamine quinone 270-273 superoxide dismutase 2 Homo sapiens 73-77 22723845-8 2012 Our findings support a model in which DAQ-mediated SOD2 inactivation increases mitochondrial ROS production, suggesting a link between oxidative stress and mitochondrial dysfunction. dopamine quinone 38-41 superoxide dismutase 2 Homo sapiens 51-55 32538547-6 2020 RESULTS: DA modifies alpha-syn with the addition of dopamine-quinone (DAQ) into lysine sites of alpha-syn in vitro and the addition of DAQ and DOPAL (3,4-dihydroxyphenylacetaldehyde) in plasma samples. dopamine quinone 70-73 synuclein alpha Homo sapiens 21-30 35456994-5 2022 DA in cytoplasm is highly reactive and is assumed to be oxidized spontaneously or by an unidentified tyrosinase to DAQ and then, synthesized to NM. dopamine quinone 115-118 tyrosinase Homo sapiens 101-111 32538547-6 2020 RESULTS: DA modifies alpha-syn with the addition of dopamine-quinone (DAQ) into lysine sites of alpha-syn in vitro and the addition of DAQ and DOPAL (3,4-dihydroxyphenylacetaldehyde) in plasma samples. dopamine quinone 70-73 synuclein alpha Homo sapiens 96-105