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Results 1 - 4 of 4
EC Number Metals/Ions Commentary Reference
Show all pathways known for 4.2.1.157Display the word mapDisplay the reaction diagram Show all sequences 4.2.1.157Iron the complex of the heterodimeric dehydratase and the homodimeric activator complex contains per mol 8.5 mol Fe corresponding to the sum of 5.0 mol Fe/mol dehydratase and 3.7 mol Fe/mol activator 733666
Show all pathways known for 4.2.1.157Display the word mapDisplay the reaction diagram Show all sequences 4.2.1.157Iron the enzyme contains 5.7 nonheme iron and 6.1 acid-labile sulfur, determined by chemical analysis 731782
Show all pathways known for 4.2.1.157Display the word mapDisplay the reaction diagram Show all sequences 4.2.1.157Zn2+ besides varying amounts of zinc, other metal ions, particularly molybdenum, are not detected in the dehydratase 731782
Show all pathways known for 4.2.1.157Display the word mapDisplay the reaction diagram Show all sequences 4.2.1.157[4Fe-4S] center the crystal structure reveals that the heterodimeric protein contains two [4Fe-4S] clusters at a distance of 12 A, each coordinated by three cysteines and one terminal ligand. The cluster in the alpha-subunit is part of the active site. In the absence of substrate, a water/hydroxide ion acts as the fourth ligand. The substrate replaces this ligand and coordinates the cluster via the carbonyl-oxygen of the thioester group. The cluster in the beta-subunit has a terminal sulfhydryl/sulfido ligand and can act as a reservoir to protect the electron from unwanted side reactions via a recycling mechanism 731980
Results 1 - 4 of 4