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Literature summary for 2.6.1.57 extracted from

  • Soto-Urzua, L.; Xochinua-Corona, Y.G.; Flores-Encarnacion, M.; Baca, B.E.
    Purification and properties of aromatic amino acid aminotransferases from Azospirillum brasilense UAP 14 strain (1996), Can. J. Microbiol., 42, 294-298.
    View publication on PubMed

General Stability

General Stability Organism
10% glycerol and 0.0001 mM pyridoxal 5'-phosphate stabilize Azospirillum brasilense

Inhibitors

Inhibitors Comment Organism Structure
indole-3-pyruvic acid competitive inhibition Azospirillum brasilense

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.19
-
L-tyrosine
-
Azospirillum brasilense
0.35
-
L-histidine
-
Azospirillum brasilense
0.36
-
L-5-fluorotryptophan
-
Azospirillum brasilense
0.43
-
L-phenylalanine
-
Azospirillum brasilense
0.58
-
2-oxoglutarate cosubstrate L-tyrosine Azospirillum brasilense
1.05
-
L-tryptophan
-
Azospirillum brasilense
1.2
-
L-5-methyltryptophan
-
Azospirillum brasilense
1.44
-
2-oxoglutarate cosubstrate L-tryptophan Azospirillum brasilense

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
33000
-
2 * 33000, SDS-PAGE Azospirillum brasilense
66000
-
gel filtration Azospirillum brasilense

Organism

Organism UniProt Comment Textmining
Azospirillum brasilense
-
rhizosphere microorganism, strain UAP 14, aromatic amino acid transaminase AAT1, predominant isoform
-

Purification (Commentary)

Purification (Comment) Organism
ammonium sulfate, DEAE-Sephacel, hydroxylapatite, Sephadex G-100, phenyl-Sepharose Azospirillum brasilense

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
26
-
-
Azospirillum brasilense

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-5-fluorotryptophan + 2-oxoglutarate
-
Azospirillum brasilense 3-indole-2-oxopropanoate + L-glutamate
-
?
L-5-methyltryptophan + 2-oxoglutarate
-
Azospirillum brasilense 3-indole-2-oxopropanoate + L-glutamate
-
?
L-histidine + 2-oxoglutarate 28% of activity with L-tyrosine Azospirillum brasilense 3-(1H-imidazol-4-yl)-2-oxopropanoate + L-glutamate
-
?
L-phenylalanine + 2-oxoglutarate very low activity with L-aspartate, L-valine and L-isoleucine Azospirillum brasilense phenylpyruvate + L-glutamate
-
?
L-tryptophan + 2-oxoglutarate
-
Azospirillum brasilense 3-indole-2-oxopropanoate + L-glutamate
-
?
L-tyrosine + 2-oxoglutarate best amino donor Azospirillum brasilense p-hydroxyphenylpyruvate + L-glutamate
-
?

Subunits

Subunits Comment Organism
dimer 2 * 33000, SDS-PAGE Azospirillum brasilense

Synonyms

Synonyms Comment Organism
AAT1
-
Azospirillum brasilense

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
with L-phenylalanine and L-tyrosine as substrates Azospirillum brasilense
8.5
-
with L-tryptophan and its derivatives as substrates Azospirillum brasilense

pH Range

pH Minimum pH Maximum Comment Organism
5 10 50% of maximal activity at pH 6.0 and pH 9.5 Azospirillum brasilense

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.17
-
indole-3-pyruvic acid
-
Azospirillum brasilense