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Literature summary for 2.6.1.1 extracted from

  • Griffith, S.M.; Vance, C.P.
    Aspartate aminotransferase in alfalfa root nodules. I. Purification and partial characterization (1989), Plant Physiol., 90, 1622-1629.
    View publication on PubMedView publication on EuropePMC

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.027
-
oxaloacetate isozyme AAT-2, including forms 2a, 2b and 2c, pH 8.0 Medicago sativa
0.031
-
oxaloacetate isozyme AAT-1, pH 8.0 Medicago sativa
0.39
-
2-oxoglutarate isozyme AAT-2, including forms 2a, 2b and 2c, pH 8.0 Medicago sativa
0.55
-
2-oxoglutarate isozyme AAT-1, pH 8.0 Medicago sativa
1.2
-
L-aspartate isozyme AAT-1, pH 8.0 Medicago sativa
1.5
-
L-aspartate isozyme AAT-2, including forms 2a, 2b and 2c, pH 8.0 Medicago sativa
18.5
-
L-glutamate isozyme AAT-1, pH 8.0 Medicago sativa
19.4
-
L-glutamate isozyme AAT-2, including forms 2a, 2b and 2c, pH 8.0 Medicago sativa

Localization

Localization Comment Organism GeneOntology No. Textmining
cytosol multiple catalytically active forms of the cytosolic enzyme Medicago sativa 5829
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
40000
-
2 * 40000, isozymes AAT-2a, 2b and 3c, SDS-PAGE Medicago sativa
80000
-
isozymes AAT-2a, 2b and 2c, gel filtration Medicago sativa

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-aspartate + 2-oxoglutarate Medicago sativa key enzyme in assimilation of C and N compounds oxaloacetate + L-glutamate
-
?

Organism

Organism UniProt Comment Textmining
Medicago sativa
-
2 cytosolic isozymes: AAT-1 and AAT-2, the latter has the 3 forms AAT-2a, AAT-2b, AAT-2c
-

Purification (Commentary)

Purification (Comment) Organism
cytosolic isozyme: multiple forms AAT-2a, AAT-2b, AAT-2c Medicago sativa

Source Tissue

Source Tissue Comment Organism Textmining
leaf low activity Medicago sativa
-
root low activity Medicago sativa
-
root nodule
-
Medicago sativa
-
stem low activity Medicago sativa
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
130
-
purified cytosolic isozyme AAT-2 form 2a Medicago sativa
140
-
purified cytosolic isozyme AAT-2 form 2c Medicago sativa
240
-
purified cytosolic isozyme AAT-2 form 2b Medicago sativa

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-aspartate + 2-oxoglutarate
-
Medicago sativa oxaloacetate + L-glutamate
-
?
L-aspartate + 2-oxoglutarate key enzyme in assimilation of C and N compounds Medicago sativa oxaloacetate + L-glutamate
-
?

Subunits

Subunits Comment Organism
dimer 2 * 40000, isozymes AAT-2a, 2b and 3c, SDS-PAGE Medicago sativa

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
isoenzyme AAT-1, isoenzyme AAT-2 Medicago sativa