ABSTRACT
Nitrophorins Nitric oxide transport b HisNe Fe(II) (S = 2) Fe(III) (S = 5/2)
Peroxidases A-H2 + H20 2^ A + 2H20 bh His Ns(+H20) Fe(III) (S = 5/2)
Chloroperoxidases AH + X - + H+ + H20 2^ AX + 2H20
b Cys Sy Fe(III) (S = 5/2)
Catalases H2O2 + H2O2 --> 2H2O + O2 b Tyr Or] Fe(III) (S = 5/2) P450 proteins RH + 0 2 + 2H+ + 2e“ —►
ROH + H20 b Cys Sy (+H20
or OH” ) Fe(III) (S = 5/2)
Heme oxygenase Heme biodegradation: Oxidation of heme to biliverdin,
CO, and free iron
b HisNe Fe(III) (S = 5/2)
CooA CO-sensing transcription activator b HisNe (or Cys)/Pro
Fe(II) (S = 0)
FixL 0 2 sensor b His Ne Fe(II) (S = 2) deoxy
Nitric oxide synthases L-Arg + 202 + 3/2 NADPH —► citrulline + nitric oxide + 3/2NADP+
b Cys Sy Fe(III) (S = 5/2)
