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Phosphorylation of cytochrome P450: Regulation by cytochrome b5
Archives of Biochemistry and Biophysics, 1989Rabbit liver cytochrome P450 LM2 and several forms of rat liver cytochrome P450 are phosphorylated by cAMP-dependent protein kinase (PKA) and by protein kinase C. Under aqueous assay conditions at neutral pH LM2 is phosphorylated only to a maximum extent of about 20 mol% by PKA.
P M, Epstein +4 more
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Conversion of Cytochrome b562 to c-Type Cytochromes
Biochemistry, 1995Cytochrome b562 from the periplasm of Escherichia coli is the only member of a family of cytochromes sharing the 4-alpha-helical bundle structural motif that does not have a covalently bound heme. We have introduced cysteine residues into the amino acid sequence of cytochrome b562 in positions homologous to those found in the other members of the ...
P D, Barker +3 more
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Photoredox reactions in cytochrome c and cytochrome c551
Inorganica Chimica Acta, 1986Abstract A previously obtained photomodified cytochrome c is analyzed in order to characterize the first coordination sphere of the heme iron. Electron spin resonance and electrochemical measurements show that iron is exa-coordinated in the photomodified cytochrome as well as in the native one and are in favour of tyrosine-67 being the sixth heme ...
MALDOTTI, Andrea +5 more
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The Journal of Steroid Biochemistry and Molecular Biology, 2009
Male pigs are routinely castrated to prevent the accumulation of testicular 16-androstene steroids, in particular 5alpha-androst-16-en-3-one (5alpha-androstenone), which contribute to an off-odour and off-flavour known as boar taint. Cytochrome P450C17 (CYP17A1) catalyses the key regulatory step in the formation of the 16-androstene steroids from ...
M J, Billen, E J, Squires
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Male pigs are routinely castrated to prevent the accumulation of testicular 16-androstene steroids, in particular 5alpha-androst-16-en-3-one (5alpha-androstenone), which contribute to an off-odour and off-flavour known as boar taint. Cytochrome P450C17 (CYP17A1) catalyses the key regulatory step in the formation of the 16-androstene steroids from ...
M J, Billen, E J, Squires
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The oxidation of cytochrome c by cytochrome c peroxidase
Archives of Biochemistry and Biophysics, 1960Abstract 1. 1. The reaction between cytochrome c and cytochrome c peroxidase is first order in cytochrome c. 2. 2. The reaction is inhibited by both oxidized and reduced cytochrome c. 3. 3. The dependence of the reaction rate on ionic strength suggests that the reaction occurs at oppositely charged active sites on the two proteins. 4.
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Cytochrome P450s and chemoprevention
Biochemical Society Transactions, 2000The cytochrome P450 mono-oxygenase system represents a major defence against chemical challenge from the environment, constituting part of an adaptive response mounted by an organism following exposure to harmful agents. Cytochrome P450s are also able to catalyse the activation of compounds to toxic products, and participate in a variety of essential ...
Henderson, C J, Sahraouei, A, Wolf, C R
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2002
Cytochrome oxidase is the terminal oxidase of most of aerobic organisms and reduces molecular oxygen (O2) to water (1). The electrons and protons required for the formation of water molecules are transferred from both sides of the mitochondrial inner membranes in eukaryotic cells and of the cell membrane in prokaryotic cells (1).
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Cytochrome oxidase is the terminal oxidase of most of aerobic organisms and reduces molecular oxygen (O2) to water (1). The electrons and protons required for the formation of water molecules are transferred from both sides of the mitochondrial inner membranes in eukaryotic cells and of the cell membrane in prokaryotic cells (1).
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Extracellular cytochrome nanowires appear to be ubiquitous in prokaryotes
Cell, 2023Virginija Cvirkaite-Krupovic +2 more
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