Using a peroxidase from Coprinus cinereus (CiP) as a model enzyme, we revealed a dominant factor for peroxidase inactivation during phenol oxidation, and we engineered radical-stable mutants by site-directed mutagenesis of an amino acid residue susceptible to modification by phenoxyl radical.
Iron dysregulation is often intimately involved and unliganded iron can act in one of two main ways, viz simply by electrostatics or via its ability to catalyse hydroxyl radical formation with covalent modification (by hydroxyl radicals) of proteins and other macromolecules [ 139, 141, 160].
Their activity is determined through the induction of transcription by inflammatory mediators, through post-translational modification by free radicals or cytokines and through inhibitory proteins such as tissue inhibitors of metalloproteinases (TIMPs) [ 3].
Their activities are determined through the induction of transcription by inflammatory mediators, through posttranslational modification by free radicals or cytokines and through inhibitory proteins such as tissue inhibitors of metalloproteinases (TIMPs) [ 1].
Under the conditions of oxidative stress, the protein and lipid components of both particles are subject to modification by free radical-mediated and nonradical mechanisms turning the properties of both lipoproteins to the unfavorable side.
Basically, this surface modification can be controlled by radical polymerization, which is a useful tool for this purpose.
Besides the post modification strategy, direct synthesis of IL-containing polymer by radical polymerization is an alternative approach.
(1) This post-translational modification (PTM) is one of several occurring during oxidative stress caused by radical species.
More extensive (e.g. Cu2 +-catalyzed) oxidation of lipoproteins also affects the apoproteins either by direct free radical attack or modification by oxidized lipids leading to dramatic changes in particle recognition by receptors.
The rheology of polystyrene (PS) was controlled by molecular modification with free radical reaction, and PS with long chain branching (LCB) level ranging from 0.15 to 1.6 branching point per 104 carbon atom was gotten.
