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Literature summary for 2.6.1.28 extracted from

  • Sukanya, N.K.; Vaidyanathan, C.S.
    Aminotransferases of Agrobacterium tumefaciens. Transamination between tryptophan and phenylpyruvate (1964), Biochem. J., 92, 594-598.
    View publication on PubMedView publication on EuropePMC

General Stability

General Stability Organism
freezing causes loss of activity Agrobacterium tumefaciens

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-tryptophan + phenylpyruvate Agrobacterium tumefaciens conversion of tryptophan into the plant indolylacetic acid 3-indole-2-oxopropanoate + L-phenylalanine
-
?

Organism

Organism UniProt Comment Textmining
Agrobacterium tumefaciens
-
-
-

Purification (Commentary)

Purification (Comment) Organism
67.5fold Agrobacterium tumefaciens

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Agrobacterium tumefaciens

Storage Stability

Storage Stability Organism
-30°C, crude enzyme, stable for more than 3 months Agrobacterium tumefaciens
0-4°C, more than 72 h, partially purified enzyme loses activity Agrobacterium tumefaciens

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-tryptophan + 2-oxoglutarate
-
Agrobacterium tumefaciens 3-indole-2-oxopropanoate + L-glutamate
-
r
L-tryptophan + 2-oxoisopentanoate i.e. L-Trp + dimethylpyruvate Agrobacterium tumefaciens 3-indole-2-oxopropanoate + L-valine
-
r
L-tryptophan + p-hydroxyphenylpyruvate
-
Agrobacterium tumefaciens 3-indole-2-oxopropanoate + tyrosine
-
r
L-tryptophan + phenylpyruvate phenylpyruvate is the most effective amino acceptor, in the reverse reaction phenylalanine is the most effective amino donor Agrobacterium tumefaciens 3-indole-2-oxopropanoate + L-phenylalanine i.e. indolepyruvate + L-Phe r
L-tryptophan + phenylpyruvate conversion of tryptophan into the plant indolylacetic acid Agrobacterium tumefaciens 3-indole-2-oxopropanoate + L-phenylalanine
-
?
additional information glutamic acid, aspartic acid, alanine, threonine, arginine, glutamine and serine are practically inactive Agrobacterium tumefaciens ?
-
?
phenylpyruvate + DL-histidine low activity Agrobacterium tumefaciens phenylalanine + 3-(1H-imidazol-4-yl)-2-oxopropanoate
-
r
phenylpyruvate + DL-isoleucine
-
Agrobacterium tumefaciens phenylalanine + 3-methyl-2-oxopentanoate
-
r
phenylpyruvate + DL-leucine
-
Agrobacterium tumefaciens phenylalanine + 4-methyl-2-oxopentanoate
-
r
phenylpyruvate + DL-methionine
-
Agrobacterium tumefaciens phenylalanine + 4-methylsulfanyl-2-oxobutanoate
-
r
phenylpyruvate + DL-valine
-
Agrobacterium tumefaciens phenylalanine + 3-methyl-2-oxobutanoate
-
r
phenylpyruvate + L-tyrosine
-
Agrobacterium tumefaciens phenylalanine + 3-(4-hydroxyphenyl)-2-oxopropanoate
-
r

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
70
-
increase in activity from 20°C to 70°C Agrobacterium tumefaciens

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
additional information
-
markedly heat-stable in presence of tryptophan, phenylpyruvate or pyridoxal 5'-phosphate Agrobacterium tumefaciens
45
-
30 min, with pyridoxal 5'-phosphate, no loss of activity Agrobacterium tumefaciens
70
-
5 min, without substrate or pyridoxal 5'-phosphate, complete loss of activity Agrobacterium tumefaciens

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
9.6
-
-
Agrobacterium tumefaciens

pH Range

pH Minimum pH Maximum Comment Organism
8.6 10.6 pH 8.6: about 70% of activity maximum, pH 10.6: about 80% of activity maximum Agrobacterium tumefaciens