A coordinated effort: The isomerization mechanism of prostaglandin H2 (PGH2), which is catalytically isomerized to prostacyclin or thromboxane A2 by cytochrome P450s, was investigated using a heme‐thiolate complex and an endoperoxide. Isomerization of endoperoxides proceeded very rapidly with this complex, whereas imidazole‐ or chloride‐ligated heme had slight or no catalytic activity (see scheme).
Der Ligand macht den Unterschied: Der Mechanismus der durch Cytochrom P450 katalysierten Isomerisierung von Prostaglandin H2 (PGH2) zu Prostacyclin oder Thromboxan A2 wurde anhand eines Häm‐Thiolat‐Komplexes und eines Endoperoxids untersucht. Die Endoperoxid‐Isomerisierung verläuft mit diesem Komplex sehr schnell, während die Imidazol‐ oder Chloridkomplexe nur schwache bzw. gar keine katalytische Aktivität zeigen (siehe Schema).
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