Protein radicals in enzyme catalysis

Article Abstract:

Protein radicals such as tyrosyl, tryptophan, glycyl and thiyl radicals have important functions in the enzymes which are involved in primary metabolic pathways. The biosynthesis of these proteins takes place via metal-mediated transformations. These radical-dependent proteins can also be considered responsible for catalytic transformations of enzymes whose catalysis can easily be analyzed.

Enzymes, Catalysis, Enzyme structure-activity relationships

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Mechanism of free radical oxygenation of polyunsaturated fatty acids by cyclooxygenases

Article Abstract:

The authors review the publications on cyclooxygenase reactions which control free radical autooxidation. The topics of interest include the fatty acid autooxidation chemistry, the role of peroxidase in cyclooxygenase activation, and the cyclooxygenase functions.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Saturated Fatty Acids, Polymers, Cyclooxygenases

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Radical initiation in the class I ribonucleotide reductase: long-range proton-coupled electron transfer?

Article Abstract:

The authors review the publications on ribonucleotide reductases. The topics of interest include the electron transfer principles, proton-coupled electron transfer, and electron transfer in biological systems.

Oxidation-reduction reaction, Oxidation-reduction reactions, Ribonucleotides, Protons

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