title: Regulation of cyclooxygenase catalysis by hydroperoxides.
abstract: Activation of cyclooxygenase catalysis in prostaglandin H synthase-1 and -2 by peroxide-dependent formation of a tyrosyl radical is emerging as an important part of regulating cellular production of bioactive prostanoids. This review discusses the mechanism of tyrosyl radical formation and the influence of peroxide, fatty acid, peroxidase cosubstrate, and protein structure on the activation process and cyclooxygenase catalysis.
authors.affiliation: Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, TX 77030, USA. richard.j.kulmacz@uth.tmc.edu
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Kulmacz
mesh_terms: D000818:Animals; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry* / Q000378:metabolism*; D011451:Prostaglandin-Endoperoxide Synthases / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D006861:Hydrogen Peroxide; D011451:Prostaglandin-Endoperoxide Synthases