Chloride Control of the Mechanism of Human Serum Ceruloplasmin (Cp) Catalysis.
Chloride Control of the Mechanism of Human Serum Ceruloplasmin (Cp) Catalysis.
复制标题
人血清铜蓝蛋白 (Cp) 催化机制的氯化物控制。
DOI:
10.1021/jacs.9b03661
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发表时间:
2019
影响因子:
15
通讯作者:
Solomon,EdwardI
中科院分区:
文献类型:
--
作者:
Tian,Shiliang;Jones,StephenM;Jose,Anex;Solomon,EdwardI
Unraveling the mechanism of ceruloplasmin (Cp) is fundamentally important toward understanding the pathogenesis of metal-mediated diseases and metal neurotoxicity. Here we report that Cl–, the most abundant anion in blood plasma, is a key component of Cp catalysis. Based on detailed spectroscopic analyses, Cl–preferentially interacts with the partially reduced trinuclear Cu cluster (TNC) in Cp under physiological conditions and shifts the electron equilibrium distribution among the two redox active type 1 (T1) Cu sites and the TNC. This shift in potential enables the intramolecular electron transfer (IET) from the T1 Cu to the native intermediate (NI) and accelerates the IET from the T1 Cu to the TNC, resulting in faster turnover in Cp catalysis.