Title : The mechanism of myeloperoxidase-dependent chlorination of monochlorodimedon.

Pub. Date : 1988 Nov 23

PMID : 2847800






6 Functional Relationships(s)
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1 Chlorination of monochlorodimedon is routinely used to measure the production of hypochlorous acid catalysed by myeloperoxidase from H2O2 and Cl-. Hypochlorous Acid myeloperoxidase Homo sapiens
2 Both the amount of hypochlorous acid formed during the burst phase, and the steady-state rate of hypochlorous acid production, increased with increasing concentrations of myeloperoxidase and with decreasing concentrations of monochlorodimedon. Hypochlorous Acid myeloperoxidase Homo sapiens
3 Both the amount of hypochlorous acid formed during the burst phase, and the steady-state rate of hypochlorous acid production, increased with increasing concentrations of myeloperoxidase and with decreasing concentrations of monochlorodimedon. Hypochlorous Acid myeloperoxidase Homo sapiens
4 From these results, and the ability of myeloperoxidase to slowly peroxidase monochlorodimedon in the absence of Cl-, we propose that the reaction of monochlorodimedon with the myeloperoxidase/H2O2/Cl- system involves a major pathway due to hypochlorous acid-dependent chlorination and a minor peroxidative pathway. Hypochlorous Acid myeloperoxidase Homo sapiens
5 From these results, and the ability of myeloperoxidase to slowly peroxidase monochlorodimedon in the absence of Cl-, we propose that the reaction of monochlorodimedon with the myeloperoxidase/H2O2/Cl- system involves a major pathway due to hypochlorous acid-dependent chlorination and a minor peroxidative pathway. Hypochlorous Acid myeloperoxidase Homo sapiens
6 We suggest, therefore, that in vivo the rate of turnover of compound II may determine the rate of myeloperoxidase-dependent production of hypochlorous acid by stimulated neutrophils. Hypochlorous Acid myeloperoxidase Homo sapiens