5I3B

Crystal Structure of tyrosinase from Bacillus megaterium with configuration B of hydroquinone inhibitor in the active site

5I3B の概要

• エントリーDOI: 10.2210/pdb5i3b/pdb
• 関連するPDBエントリー: 5I3A
• 分子名称: Tyrosinase, ZINC ION, benzene-1,4-diol, ... (4 entities in total)
• 機能のキーワード: di-copper oxidase, oxidoreductase
• 由来する生物種: Bacillus megaterium
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 67125.80

構造登録者

Kanteev, M.,Deri, B.,Adir, N.,Fishman, A. (登録日: 2016-02-10, 公開日: 2016-10-12, 最終更新日: 2024-01-10)

主引用文献

Deri, B.,Kanteev, M.,Goldfeder, M.,Lecina, D.,Guallar, V.,Adir, N.,Fishman, A.
The unravelling of the complex pattern of tyrosinase inhibition.
Sci Rep, 6:34993-34993, 2016

PubMed Abstract: Tyrosinases are responsible for melanin formation in all life domains. Tyrosinase inhibitors are used for the prevention of severe skin diseases, in skin-whitening creams and to avoid fruit browning, however continued use of many such inhibitors is considered unsafe. In this study we provide conclusive evidence of the inhibition mechanism of two well studied tyrosinase inhibitors, KA (kojic acid) and HQ (hydroquinone), which are extensively used in hyperpigmentation treatment. KA is reported in the literature with contradicting inhibition mechanisms, while HQ is described as both a tyrosinase inhibitor and a substrate. By visualization of KA and HQ in the active site of TyrBm crystals, together with molecular modeling, binding constant analysis and kinetic experiments, we have elucidated their mechanisms of inhibition, which was ambiguous for both inhibitors. We confirm that while KA acts as a mixed inhibitor, HQ can act both as a TyrBm substrate and as an inhibitor.

PubMed: 27725765
DOI: 10.1038/srep34993

実験手法

X-RAY DIFFRACTION (2.2 Å)