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Literature summary extracted from

  • Hucklesby, D.P.; Hewitt, E.J.
    Nitrite and hydroxylamine reduction in higher plants. Fractionation, electron donor and substrate specificity of leaf enzymes, principally from vegetable marrow (Cucurbita pepo L.) (1970), Biochem. J., 119, 615-627.
    View publication on PubMedView publication on EuropePMC

Inhibitors

EC Number Inhibitors Comment Organism Structure
1.7.99.1 Guanidinium chloride 25% inhibition at 2 mM, 30% inhibition at 3 mM Cucurbita pepo

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
1.7.99.1 35000
-
hydroxylamine reductase 2, gel filtration Cucurbita pepo
1.7.99.1 60000
-
hydroxylamine reductase 1, gel filtration Cucurbita pepo

Organism

EC Number Organism UniProt Comment Textmining
1.7.99.1 Cucurbita pepo
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
1.7.99.1
-
Cucurbita pepo

Source Tissue

EC Number Source Tissue Comment Organism Textmining
1.7.99.1 leaf
-
Cucurbita pepo
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.7.99.1 additional information
-
specific activities after different purification methods Cucurbita pepo

Storage Stability

EC Number Storage Stability Organism
1.7.99.1 -18°C, DEAE-cellulose fraction, often stable for several weeks, but unpredictable loss of activity Cucurbita pepo

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.7.99.1 hydroxylamine + reduced acceptor hydroxylamine reductase 1 reacts with reduced benzyl viologen, ferredoxin and FMNH2 Cucurbita pepo ammonia + oxidized acceptor
-
?
1.7.99.1 hydroxylamine + reduced acceptor hydroxylamine reductase 2 reacts with benzyl viologen and dithionite Cucurbita pepo ammonia + oxidized acceptor
-
?

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
1.7.99.1 55
-
10 min, 25-40% loss of activity Cucurbita pepo
1.7.99.1 60
-
10 min, 50-85% loss of activity Cucurbita pepo

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
1.7.99.1 additional information
-
no clear or consistent pH optima observed with hydroxylamine reductase 1 and hydroxylamine reductase 2 Cucurbita pepo