Cloned (Comment) | Organism |
---|---|
gene gabT, recombinant expression of His6-tagged enzyme in Escherichia coli strain BL21(DE3) | Corynebacterium glutamicum |
gene NCgl2515, recombinant expression of His6-tagged enzyme in Escherichia coli strain BL21(DE3) | Corynebacterium glutamicum |
Protein Variants | Comment | Organism |
---|---|---|
additional information | construction of the gabT NCgl2515-deleted GAD strain SYN203, deletion of the gabT gene encoding GABA-T, and deletion of the additional transaminase gene, NCgl2515, in a gabT-deleted GAD strain | Corynebacterium glutamicum |
additional information | construction of the gabT-deleted GAD strain SYN201, deletion of the gabT gene encoding GABA-T, and deletion of the additional transaminase gene, NCgl2515, in a gabT-deleted GAD strain | Corynebacterium glutamicum |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
9.21 | - |
2-oxoglutarate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum | |
10.63 | - |
4-aminobutanoate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum LMG 3730 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum BCRC 11384 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum ATCC 13032 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum JCM 1318 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum NCIMB 10025 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | Corynebacterium glutamicum DSM 20300 | - |
succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum LMG 3730 | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum BCRC 11384 | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum ATCC 13032 | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum JCM 1318 | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum NCIMB 10025 | - |
succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | Corynebacterium glutamicum DSM 20300 | - |
succinate semialdehyde + L-alanine | - |
r |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Corynebacterium glutamicum | P46395 | - |
- |
Corynebacterium glutamicum | Q8NT48 | - |
- |
Corynebacterium glutamicum ATCC 13032 | P46395 | - |
- |
Corynebacterium glutamicum ATCC 13032 | Q8NT48 | - |
- |
Corynebacterium glutamicum BCRC 11384 | P46395 | - |
- |
Corynebacterium glutamicum BCRC 11384 | Q8NT48 | - |
- |
Corynebacterium glutamicum DSM 20300 | P46395 | - |
- |
Corynebacterium glutamicum DSM 20300 | Q8NT48 | - |
- |
Corynebacterium glutamicum JCM 1318 | P46395 | - |
- |
Corynebacterium glutamicum JCM 1318 | Q8NT48 | - |
- |
Corynebacterium glutamicum LMG 3730 | P46395 | - |
- |
Corynebacterium glutamicum LMG 3730 | Q8NT48 | - |
- |
Corynebacterium glutamicum NCIMB 10025 | P46395 | - |
- |
Corynebacterium glutamicum NCIMB 10025 | Q8NT48 | - |
- |
Purification (Comment) | Organism |
---|---|
recombinant His6-tagged enzyme from Escherichia coli strain BL21(DE3) by nickel affinity chromatography | Corynebacterium glutamicum |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.03 | - |
NCgl2515 activity, with substrate 4-aminobutanoate, pH 8.0, 30°C | Corynebacterium glutamicum |
1.34 | - |
GABA-T activity, with substrate 4-aminobutanoate, pH 7.8, 30°C | Corynebacterium glutamicum |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum LMG 3730 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum BCRC 11384 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum ATCC 13032 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum JCM 1318 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum NCIMB 10025 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + 2-oxoglutarate | - |
Corynebacterium glutamicum DSM 20300 | succinate semialdehyde + L-glutamate | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum LMG 3730 | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum BCRC 11384 | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum ATCC 13032 | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum JCM 1318 | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum NCIMB 10025 | succinate semialdehyde + L-alanine | - |
r | |
4-aminobutanoate + pyruvate | - |
Corynebacterium glutamicum DSM 20300 | succinate semialdehyde + L-alanine | - |
r | |
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum LMG 3730 | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum BCRC 11384 | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum ATCC 13032 | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum JCM 1318 | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum NCIMB 10025 | ? | - |
- |
|
additional information | substrate specificity analysis. GABA-T-SSADH coupling activity of GabT-GabD proteins is analyzed and compared with that of NCgl2515-GabD proteins. The GabT-GabD exhibits much higher levels of 2-oxo-dependent GABA-T-SSADH activity (1.25 U/mg) than NCgl2515-GabD, no pyruvate-dependent GABA-T-SSADH activity is detected | Corynebacterium glutamicum DSM 20300 | ? | - |
- |
Synonyms | Comment | Organism |
---|---|---|
bioA | - |
Corynebacterium glutamicum |
GABA transaminase | - |
Corynebacterium glutamicum |
GABA-T | - |
Corynebacterium glutamicum |
GabT | - |
Corynebacterium glutamicum |
More | cf. EC 2.6.1.62, adenosylmethionine-8-amino-7-oxononanoate aminotransferase | Corynebacterium glutamicum |
NCgl0462 | - |
Corynebacterium glutamicum |
NCgl2515 | - |
Corynebacterium glutamicum |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
assay at | Corynebacterium glutamicum |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.34 | - |
2-oxoglutarate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum | |
3.77 | - |
4-aminobutanoate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.8 | - |
recombinant GabT | Corynebacterium glutamicum |
8 | - |
assay at | Corynebacterium glutamicum |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
pyridoxal 5'-phosphate | PLP | Corynebacterium glutamicum |
General Information | Comment | Organism |
---|---|---|
malfunction | deletion of the gabT gene encoding GABA-T cannot prevent GABA from decomposing at neutral pH. An additional transaminase gene, NCgl2515, is deleted in a gabT-deleted GAD strain, but the GABA concentration in this gabT NCgl2515-deleted GAD strain remains unaltered when pH is maintained at pH 7.5-7.8, demonstrating that GABA decomposition is reduced | Corynebacterium glutamicum |
malfunction | deletion of the gabT gene encoding GABA-T cannot prevent GABA from decomposing at neutral pH. An additional transaminase gene, NCgl2515, is deleted in a gabT-deleted GAD strain, but the GABA concentration in this gabT-deleted GAD strain NCgl2515 remains unaltered when pH is maintained at pH 7.5-8.0, demonstrating that GABA decomposition is reduced | Corynebacterium glutamicum |
metabolism | unlike GabT, which exhibits high GABA-T activity and utilizes only 2-oxoglutarate as amino acceptor, the purified NCgl2515 protein exhibits very low GABA-T activity only when coupled with succinate-semialdehyde dehydrogenase (SSADH) GabD, but can utilize both 2-oxoglutarate and pyruvate as amino acceptor | Corynebacterium glutamicum |
metabolism | unlike GabT, which exhibits high GABA-T activity and utilizes only 2-oxoglutarate as amino acceptor, the purified NCgl2515 protein exhibits very low GABA-T activity only when coupled with succinate-semialdehyde dehydrogenase (SSADH), GabD, but can utilize both 2-oxoglutarate and pyruvate as amino acceptor | Corynebacterium glutamicum |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.037 | - |
2-oxoglutarate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum | |
0.36 | - |
4-aminobutanoate | recombinant enzyme GabT, pH 7.8, 30°C | Corynebacterium glutamicum |