EC Number | Activating Compound | Comment | Organism | Structure |
---|---|---|---|---|
2.6.1.13 | additional information | in rice, cycloheximide, a protein synthesis inhibitor, has no effect on OAT activity induced by water stress | Oryza sativa | |
2.6.1.13 | additional information | OAT activity increases by salt-stress treatment in Arabidopsis thaliana | Arabidopsis thaliana |
EC Number | Application | Comment | Organism |
---|---|---|---|
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Cucurbita pepo |
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Oryza sativa |
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Nicotiana plumbaginifolia |
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Pisum sativum |
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Arabidopsis thaliana |
2.6.1.13 | biotechnology | genetic engineering of plants for increased production of the osmoprotectant proline, transgenic plants overexpressing OAT display enhanced tolerance to salt and drought due to increased proline content | Vigna aconitifolia |
2.6.1.13 | drug development | human OAT as a potential target for development of new therapeutic drugs, OAT holds a significant scientific interest because of its association with gyrate atrophy, a recessive hereditary genetic dissorder leading to progressive loss of vision and eventually blindness in humans | Homo sapiens |
2.6.1.13 | drug development | human OAT is recognized as a potential target for chemotherapeutic drug development, in a study performed to evaluate the effect of selective blocking of mitosis in human cancer cells, OAT is identified as a protein, which binds the antimitotic drug diazonamide A and it has a role in regulating mitotic cell division | Homo sapiens |
EC Number | Cloned (Comment) | Organism |
---|---|---|
2.6.1.13 | a recombinant seedling OAT is obtained by cDNA expression in Escherichia coli and its substrate specificity is measured, the enzyme is found to be strictly specific for L-ornithine showing practically no activity with putrescine, 1,3-diamimopropane and 4-aminobutyrate | Pisum sativum |
2.6.1.13 | expression of the entire human gene in Escherichia coli | Homo sapiens |
2.6.1.13 | mothbean enzyme is expressed in Escherichia coli | Vigna aconitifolia |
2.6.1.13 | Nicotiana plumbaginifolia plants overexpressing OAT from Arabidopsis synthesize more proline than the control plants and show a higher biomass and a higher germination rate under osmotic stress conditions | Arabidopsis thaliana |
EC Number | Crystallization (Comment) | Organism |
---|---|---|
2.6.1.13 | human OAT is crystallized as a recombinant protein obtained by expression of the entire gene in Escherichia coli, the packing of the dimers in the crystal yields a hexameric quaternary structure in which 3 dimers are arranged to form about one turn of a right-handed superhelix, OAT is also crystallized in the presence of L-canaline and gabaculine, co-crystallization of OAT with (2S, 5S)-5-fluoromethylornithine | Homo sapiens |
EC Number | Protein Variants | Comment | Organism |
---|---|---|---|
2.6.1.13 | Y85I | mutation of Tyr85 in human OAT to Ile decreases the rate of the reaction of the enzyme with ornithine 1000fold and increases that with 4-aminobutyrate 16fold, indicating that Tyr85 is a major determinant of specificity toward ornithine | Homo sapiens |
EC Number | Inhibitors | Comment | Organism | Structure |
---|---|---|---|---|
2.6.1.13 | (2S,5S)-5-fluoromethylornithine | it blocks the enzyme by a suicide reaction (mechanism-based inhibition) leading to a covalent adduct with the cofactor | Homo sapiens | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Arabidopsis thaliana | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Cucurbita pepo | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Homo sapiens | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Nicotiana plumbaginifolia | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Oryza sativa | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Pisum sativum | |
2.6.1.13 | 5-amino-1,3-cyclohexadienyl carboxylic acid | gabaculine | Vigna aconitifolia |
EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
2.6.1.13 | 0.75 | - |
2-oxoglutarate | - |
Vigna aconitifolia | |
2.6.1.13 | 2 | - |
L-ornithine | - |
Vigna aconitifolia | |
2.6.1.13 | 4.7 | - |
L-ornithine | - |
Cucurbita pepo | |
2.6.1.13 | 6.3 | - |
2-oxoglutarate | - |
Cucurbita pepo |
EC Number | Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|---|
2.6.1.13 | mitochondrion | - |
Homo sapiens | 5739 | - |
2.6.1.13 | mitochondrion | - |
Cucurbita pepo | 5739 | - |
2.6.1.13 | mitochondrion | - |
Oryza sativa | 5739 | - |
2.6.1.13 | mitochondrion | - |
Nicotiana plumbaginifolia | 5739 | - |
2.6.1.13 | mitochondrion | - |
Pisum sativum | 5739 | - |
2.6.1.13 | mitochondrion | - |
Arabidopsis thaliana | 5739 | - |
2.6.1.13 | mitochondrion | - |
Vigna aconitifolia | 5739 | - |
EC Number | Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|---|
2.6.1.13 | 50000 | - |
mothbean enzyme, 1 * 50000 | Vigna aconitifolia |
EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.6.1.13 | L-ornithine + 2-oxoglutarate | Homo sapiens | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Cucurbita pepo | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Oryza sativa | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Nicotiana plumbaginifolia | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Pisum sativum | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Arabidopsis thaliana | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | Vigna aconitifolia | - |
DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
2.6.1.13 | Arabidopsis thaliana | Q9FNK4 | - |
- |
2.6.1.13 | Cucurbita pepo | - |
- |
- |
2.6.1.13 | Homo sapiens | - |
- |
- |
2.6.1.13 | Nicotiana plumbaginifolia | - |
- |
- |
2.6.1.13 | Oryza sativa | - |
- |
- |
2.6.1.13 | Pisum sativum | B1A0U3 | - |
- |
2.6.1.13 | Vigna aconitifolia | P31893 | - |
- |
EC Number | Source Tissue | Comment | Organism | Textmining |
---|---|---|---|---|
2.6.1.13 | liver | - |
Homo sapiens | - |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Homo sapiens | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Cucurbita pepo | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Oryza sativa | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Nicotiana plumbaginifolia | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Pisum sativum | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Arabidopsis thaliana | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? | |
2.6.1.13 | L-ornithine + 2-oxoglutarate | - |
Vigna aconitifolia | DELTA1-pyrroline-5-carboxylate + L-glutamate | - |
? |
EC Number | Subunits | Comment | Organism |
---|---|---|---|
2.6.1.13 | homodimer | the crystal structure of the human enzyme is determined, the functional unit of the protein consists of a dimer built from 2 identical subunits, each monomer contains 12 alpha-helices and 14 beta-strands and can be structurally divided into 3 domains: a large 249 residue domain (PLP-binding domain), a small C-terminal domain of 95 residues and an N-terminal segment of 42 residues | Homo sapiens |
2.6.1.13 | monomer | mothbean enzyme, 1 * 50000 | Vigna aconitifolia |
EC Number | Synonyms | Comment | Organism |
---|---|---|---|
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Homo sapiens |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Cucurbita pepo |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Oryza sativa |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Nicotiana plumbaginifolia |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Pisum sativum |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Arabidopsis thaliana |
2.6.1.13 | L-ornithine:2-oxoacid aminotransferase | - |
Vigna aconitifolia |
2.6.1.13 | OAT | - |
Homo sapiens |
2.6.1.13 | OAT | - |
Cucurbita pepo |
2.6.1.13 | OAT | - |
Oryza sativa |
2.6.1.13 | OAT | - |
Nicotiana plumbaginifolia |
2.6.1.13 | OAT | - |
Pisum sativum |
2.6.1.13 | OAT | - |
Arabidopsis thaliana |
2.6.1.13 | OAT | - |
Vigna aconitifolia |
2.6.1.13 | ornithine delta-aminotransferase | - |
Homo sapiens |
2.6.1.13 | ornithine delta-aminotransferase | - |
Cucurbita pepo |
2.6.1.13 | ornithine delta-aminotransferase | - |
Oryza sativa |
2.6.1.13 | ornithine delta-aminotransferase | - |
Nicotiana plumbaginifolia |
2.6.1.13 | ornithine delta-aminotransferase | - |
Pisum sativum |
2.6.1.13 | ornithine delta-aminotransferase | - |
Arabidopsis thaliana |
2.6.1.13 | ornithine delta-aminotransferase | - |
Vigna aconitifolia |
EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|---|
2.6.1.13 | 8 | - |
- |
Cucurbita pepo |
2.6.1.13 | 8 | - |
- |
Vigna aconitifolia |
EC Number | Cofactor | Comment | Organism | Structure |
---|---|---|---|---|
2.6.1.13 | pyridoxal 5'-phosphate | - |
Homo sapiens | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Cucurbita pepo | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Oryza sativa | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Nicotiana plumbaginifolia | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Pisum sativum | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Arabidopsis thaliana | |
2.6.1.13 | pyridoxal 5'-phosphate | - |
Vigna aconitifolia |
EC Number | General Information | Comment | Organism |
---|---|---|---|
2.6.1.13 | physiological function | enzyme is implicated in salt tolerance in higher plants, enzyme is implicated in proline biosynthesis and accumulation via pyrroline-5-carboxylate | Cucurbita pepo |
2.6.1.13 | physiological function | enzyme is implicated in salt tolerance in higher plants, enzyme is implicated in proline biosynthesis and accumulation via pyrroline-5-carboxylate | Oryza sativa |
2.6.1.13 | physiological function | enzyme is implicated in salt tolerance in higher plants, enzyme is implicated in proline biosynthesis and accumulation via pyrroline-5-carboxylate | Pisum sativum |
2.6.1.13 | physiological function | enzyme is implicated in salt tolerance in higher plants, enzyme is implicated in proline biosynthesis and accumulation via pyrroline-5-carboxylate | Vigna aconitifolia |
2.6.1.13 | physiological function | enzyme is implicated in salt tolerance in higher plants, enzyme is implicated in proline biosynthesis and accumulation via pyrroline-5-carboxylate, OAT is essential for nitrogen recycling from arginine but not for the stress-induced proline accumulation, OAT probably links the degradation pathways for arginine and proline | Arabidopsis thaliana |