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. 2020 Jun 28;295(33):11789–11802. doi: 10.1074/jbc.RA120.013915

Table 2.

EPR and UV-visible absorbance spectroscopic parameters of nitrosyl complexes formed in nonheme iron enzymes catalyzing thiol oxidatione

Protein Protein ligand Substrate coordination Enzyme-nitrosyl complex ES-nitrosyl complex
ADOa 3-His Monodentate, via thiol {Fe(NO)}7, S = 3/2, g = 4.10, 3.95, 2.00; 340, 406 nm {Fe(NO)2}9, S = 1/2, g = 2.04, 2.01; 390 or 397 nm
CDOb 3-His Bidentate, via thiol and amine {Fe(NO)}7, S = 3/2, g ∼ 4, 4, 2 {Fe(NO)}7, S = 1/2, g = 2.07, 2.02, 1.98
3MDOc 3-His Unclear, thiol involved Not applicable {Fe(NO)}7, S = 3/2, g = 4.06, 3.96, 2.00
IPNSd 2-His-2-carboxylate Monodentate, via thiol {Fe(NO)}7, S = 3/2, g = 4.09, 3.95, 2.00; 340, 430, 600 nm {Fe(NO)}7, S = 3/2, g = 4.22, 3.81, 1.99; 508, 720 nm

a Results from this work.

b Results from references 28 and 47.

c Results from references 8 and 52.

d Results from references 39 and 62.

e For EPR parameters, only the enzyme-based, predominant species are summarized here.