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Literature summary for 2.4.1.195 extracted from

  • Matsuo, M.; Underhill, E.W.
    Purification and properties of a UDP glucose:thiohydroximate glucosyltransferase from higher plants (1971), Phytochemistry, 10, 2279-2288.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
1,10-phenanthroline 0.1 mM, activation Tropaeolum majus
2,2'-dipyridyl 1.0 mM, activation Tropaeolum majus
2-mercaptoethanol requirement Tropaeolum majus
2-mercaptoethanol activity dissappears in absence Tropaeolum majus
Cysteine hydrochloride 1.0 mM, activation Tropaeolum majus
dithiothreitol 1.0 mM, activation Tropaeolum majus
EDTA 0.01 mM, activation Tropaeolum majus
glutathione 1.0 mM, activation Tropaeolum majus

Inhibitors

Inhibitors Comment Organism Structure
HgCl2
-
Tropaeolum majus
additional information no inhibition by KCN or iodoacetic acid, only moderately inhibited by N-ethylmaleimide Tropaeolum majus
p-chloromercuribenzoate
-
Tropaeolum majus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.05
-
4-methylthiobutyrothiohydroximate pH 7.4, 30°C Tropaeolum majus
1.47
-
UDPglucose pH 7.4, 30°C, 4-methylthiobutyrothiohydroximate Tropaeolum majus
1.54
-
UDPglucose pH 7.4, 30°C, phenylacetothiohydroximate Tropaeolum majus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
50000
-
gel filtration Tropaeolum majus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
UDPglucose + phenylacetothiohydroximate Sinapis alba
-
UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate Nasturtium officinale
-
UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate Armoracia rusticana
-
UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate Tropaeolum majus integral step in the biosynthesis of benzylglucosinolate UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate Nasturtium officinale R.Br.
-
UDP + desulfoglucotropeolin
-
?

Organism

Organism UniProt Comment Textmining
Armoracia rusticana
-
-
-
Nasturtium officinale
-
R.Br.
-
Nasturtium officinale R.Br.
-
R.Br.
-
Sinapis alba
-
-
-
Tropaeolum majus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Tropaeolum majus

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Sinapis alba
-
leaf
-
Tropaeolum majus
-
leaf
-
Nasturtium officinale
-
leaf
-
Armoracia rusticana
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
45
-
-
Tropaeolum majus

Storage Stability

Storage Stability Organism
-15°C, freeze-dried protein, specific activity remains unchanged for more than 3 months Tropaeolum majus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information acetothiohydroximate, phenylacetohydroximic acid, ethanol, 2-mercaptoethanol and cysteine hydrochloride are no substrates Tropaeolum majus ?
-
?
UDP-glucose + 4-methylthiobutyrothiohydroximate relative reaction rate 77% Tropaeolum majus UDP + S-(alpha-D-glucopyranosyl)-4-methylthiobutyrothiohydroximate
-
?
UDP-glucose + benzothiohydroximate relative reaction rate 10% Tropaeolum majus UDP + S-(alpha-D-glucopyranosyl)-benzothiohydroximate
-
?
UDP-glucose + isobutyrothiohydroximate relative reaction rate 41% Tropaeolum majus UDP + S-(alpha-D-glucopyranosyl)-isobutyrothiohydroximate
-
?
UDPglucose + butyrothiohydroximate relative reaction rate 70% Tropaeolum majus UDP + S-(alpha-D-glucopyranosyl)-butyrothiohydroximate
-
?
UDPglucose + phenylacetothiohydroximate
-
Sinapis alba UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate
-
Tropaeolum majus UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate
-
Nasturtium officinale UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate
-
Armoracia rusticana UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate integral step in the biosynthesis of benzylglucosinolate Tropaeolum majus UDP + desulfoglucotropeolin
-
?
UDPglucose + phenylacetothiohydroximate
-
Nasturtium officinale R.Br. UDP + desulfoglucotropeolin
-
?
UDPglucose + propiothiohydroximate relative reaction rate 50% Tropaeolum majus UDP + S-(alpha-D-glucopyranosyl)-propiothiohydroximate
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5 7.5 greater activity in phosphate and Tris-HCl buffers than in Tris-maleate Tropaeolum majus