Department of Chemistry, University of Nevada, Reno, NV 89557, USA.
Angew Chem Int Ed Engl. 2013 Feb 25;52(9):2569-72. doi: 10.1002/anie.201209746. Epub 2013 Jan 22.
Sneaky little SOD! A metallopeptide-based mimic of nickel-containing superoxide dismutase was used to probe the mechanism of superoxide reduction by the metalloenzyme. Kinetic studies suggest a proton-coupled electron-transfer mechanism; large H/D kinetic isotope effects (KIE) are observed. XAS studies suggest the transferred H-atom is in the form of a Ni(II) -S(H)-Cys moiety.
狡猾的 SOD!基于金属肽的镍结合超氧化物歧化酶模拟物被用于研究金属酶还原超氧化物的机制。动力学研究表明这是一种质子偶联的电子转移机制;观察到较大的 H/D 动力学同位素效应(KIE)。XAS 研究表明转移的 H 原子以 Ni(II)-S(H)-Cys 部分的形式存在。