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Rifampicin is not an inhibitor of tyrosinase.
Tarasek D, Wojtasek H. Tarasek D, et al. Int J Biol Macromol. 2022 Sep 1;216:830-835. doi: 10.1016/j.ijbiomac.2022.07.217. Epub 2022 Jul 30. Int J Biol Macromol. 2022. PMID: 35914550 Free article.
However, rifampicin contains a p-diphenol group and compounds with such a moiety have been shown before to reduce tyrosinase-generated o-quinones. Rifampicin also shows strong absorption in a region completely overlapping with the visible absorption band of dopachrome, the …
However, rifampicin contains a p-diphenol group and compounds with such a moiety have been shown before to reduce tyrosinase-generated o- …
Oxidation of baicalein by tyrosinase and by o-quinones.
Gąsowska-Bajger B, Wojtasek H. Gąsowska-Bajger B, et al. Int J Biol Macromol. 2023 Mar 15;231:123317. doi: 10.1016/j.ijbiomac.2023.123317. Epub 2023 Jan 19. Int J Biol Macromol. 2023. PMID: 36682663
Gallic acid was also shown to reduce tyrosinase-generated o-quinones. We have demonstrated that baicalein is also rapidly oxidized by o-quinones generated from catechols by tyrosinase or by treatment with sodium periodate. ...
Gallic acid was also shown to reduce tyrosinase-generated o-quinones. We have demonstrated that baicalein is also rapidly oxidized by …
Mechanisms of interference of p-diphenols with the Trinder reaction.
Tarasek D, Gąsowska-Bajger B, Wojtasek H. Tarasek D, et al. Bioorg Chem. 2020 Apr;97:103692. doi: 10.1016/j.bioorg.2020.103692. Epub 2020 Feb 22. Bioorg Chem. 2020. PMID: 32155504
However, in the presence of standard substrates all tested p-diphenols were rapidly converted to p-quinones. Hydrogen peroxide consumption was significantly accelerated by homogentisic acid but not much affected by the other p-diphenols. ...
However, in the presence of standard substrates all tested p-diphenols were rapidly converted to p-quinones. Hydrogen peroxide consum …
Comment on "Natural and synthetic flavonoid derivatives as new potential tyrosinase inhibitors: a systematic review" by R. Obaid, E. Mughal, N. Naeem, A. Sadiq, R. Alsantali, R. Jassas, Z. Moussa and S. Ahmed, RSC Advances, 2021, 11, 22159.
Wojtasek H. Wojtasek H. RSC Adv. 2022 Feb 14;12(9):5395-5397. doi: 10.1039/d1ra08162d. eCollection 2022 Feb 10. RSC Adv. 2022. PMID: 35425534 Free PMC article.
However, many compounds included in this review have been previously shown to act as substrates of this enzymes or antioxidants reducing tyrosinase-generated o-quinones. Products of their oxidation absorb light in a range different than dopachrome, the oxidation product of …
However, many compounds included in this review have been previously shown to act as substrates of this enzymes or antioxidants reducing tyr …
Quercetin is a substrate not an inhibitor of tyrosinase - comments on "Quercetin as a tyrosinase inhibitor: Inhibitory activity, conformational change and mechanism" published by Fan et al. (2017).
Wojtasek H. Wojtasek H. Food Res Int. 2022 Mar;153:110944. doi: 10.1016/j.foodres.2022.110944. Epub 2022 Jan 7. Food Res Int. 2022. PMID: 35227469
However, it was firmly established in the literature before that this compound was a substrate of this enzyme and an antioxidant reducing tyrosinase-generated o-quinones....
However, it was firmly established in the literature before that this compound was a substrate of this enzyme and an antioxidant reducing ty …
Comparison of sulfide-oxidizing Sulfurimonas strains reveals a new mode of thiosulfate formation in subsurface environments.
Lahme S, Callbeck CM, Eland LE, Wipat A, Enning D, Head IM, Hubert CRJ. Lahme S, et al. Environ Microbiol. 2020 May;22(5):1784-1800. doi: 10.1111/1462-2920.14894. Epub 2020 Jan 2. Environ Microbiol. 2020. PMID: 31840396
Formation of elemental sulfur (S(0) ) and high expression of sulfide quinone oxidoreductase (SQR) genes indicates that sulfide oxidation in both strains is mediated by SQR. ...
Formation of elemental sulfur (S(0) ) and high expression of sulfide quinone oxidoreductase (SQR) genes indicates that sulfide oxidat …
Identification of Carotenoids and Isoprenoid Quinones from Asaia lannensis and Asaia bogorensis.
Antolak H, Oracz J, Otlewska A, Żyżelewicz D, Kręgiel D. Antolak H, et al. Molecules. 2017 Sep 25;22(10):1608. doi: 10.3390/molecules22101608. Molecules. 2017. PMID: 28946700 Free PMC article.
The aim of the study was to identify and quantitatively assess of carotenoids and isoprenoid quinones biosynthesized by six different strains of acetic acid bacteria, belonging to genus Asaia, that are common beverage-spoiling bacteria in Europe. Bacterial cultures were co …
The aim of the study was to identify and quantitatively assess of carotenoids and isoprenoid quinones biosynthesized by six different …
25 results