Download MendeleyExogenous acetate ion reaches the type II copper centre in CueO through the water-excretion channel and potentially affects the enzymatic activity.
Komori, H., Kataoka, K., Tanaka, S., Matsuda, N., Higuchi, Y., Sakurai, T.(2016) Acta Crystallogr Sect F Struct Biol Cryst Commun 72: 558-563
- PubMed: 27380373
- DOI: https://doi.org/10.1107/S2053230X16009237
- Primary Citation of Related Structures:
4EF3 - PubMed Abstract:
The acetate-bound form of the type II copper was found in the X-ray structure of the multicopper oxidase CueO crystallized in acetate buffer in addition to the conventional OH(-)-bound form as the major resting form. The acetate ion was retained bound to the type II copper even after prolonged exposure of a CueO crystal to X-ray radiation, which led to the stepwise reduction of the Cu centres. However, in this study, when CueO was crystallized in citrate buffer the OH(-)-bound form was present exclusively. This fact shows that an exogenous acetate ion reaches the type II Cu centre through the water channel constructed between domains 1 and 3 in the CueO molecule. It was also found that the enzymatic activity of CueO is enhanced in the presence of acetate ions in the solvent water.
Organizational Affiliation:
Faculty of Education, Kagawa University, 1-1 Saiwai-cho, Takamatsu, Kagawa 760-8522, Japan.
