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Literature summary for 1.14.15.20 extracted from

  • Muramoto, T.; Tsurui, N.; Terry, M.; Yokota, A.; Kohchi, T.
    Expression and biochemical properties of a ferredoxin-dependent heme oxygenase required for phytochrome chromophore synthesis (2002), Plant Physiol., 130, 1958-1966.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
4,5-dihydroxy-1,3-benzene disulfonic acid
-
Arabidopsis thaliana
6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid significantly increases enzyme activity Arabidopsis thaliana
dehydroascorbate
-
Arabidopsis thaliana
desferrioxamine
-
Arabidopsis thaliana
isoascorbate
-
Arabidopsis thaliana
L-ascorbate the enzyme requires an iron chelator and second reductant, such as L-ascorbate, for full activity Arabidopsis thaliana
o-phenanthroline
-
Arabidopsis thaliana
Trolox
-
Arabidopsis thaliana

Cloned(Commentary)

Cloned (Comment) Organism
expressed in Escherichia coli BL21 cells Arabidopsis thaliana

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0013
-
hemin at pH 7.2 and 25°C Arabidopsis thaliana

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
27000
-
x * 27000, recombinant enzyme, SDS-PAGE Arabidopsis thaliana
53000
-
gel filtration Arabidopsis thaliana

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
hemin + reduced ferredoxin [iron-sulfur] cluster + O2 + H+ Arabidopsis thaliana
-
biliverdin IXalpha + Fe2+ + CO + oxidized ferredoxin [iron-sulfur] cluster + H2O
-
?

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana
-
-
-

Purification (Commentary)

Purification (Comment) Organism
Q sepharose column chromatography Arabidopsis thaliana

Storage Stability

Storage Stability Organism
-30°C, in 50 mM HEPES-NaOH (pH 7.2) with 40% (v/v) glycerol, at least 3 months, no loss of activity Arabidopsis thaliana

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
hemin + reduced ferredoxin [iron-sulfur] cluster + O2 + H+
-
Arabidopsis thaliana biliverdin IXalpha + Fe2+ + CO + oxidized ferredoxin [iron-sulfur] cluster + H2O
-
?

Subunits

Subunits Comment Organism
? x * 27000, recombinant enzyme, SDS-PAGE Arabidopsis thaliana
? x * 53000, GST-tagged enzyme, SDS-PAGE Arabidopsis thaliana

Synonyms

Synonyms Comment Organism
ferredoxin-dependent heme oxygenase
-
Arabidopsis thaliana
Ho1
-
Arabidopsis thaliana
HY1
-
Arabidopsis thaliana

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
-
Arabidopsis thaliana

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.2
-
-
Arabidopsis thaliana

Cofactor

Cofactor Comment Organism Structure
heme the enzyme forms a 1:1 complex with heme Arabidopsis thaliana