Biosynthesis of L-glutamate from L-aspartate or L-cysteine. Important regulator of levels of glutamate, the major excitatory neurotransmitter of the vertebrate central nervous system. Acts as a scavenger of glutamate in brain neuroprotection. The aspartate aminotransferase activity is involved in hepatic glucose synthesis during development and in adipocyte glyceroneogenesis. Using L-cysteine as substrate, regulates levels of mercaptopyruvate, an important source of hydrogen sulfide. Mercaptopyruvate is converted into H2S via the action of 3-mercaptopyruvate sulfurtransferase (3MST). Hydrogen sulfide is an important synaptic modulator and neuroprotectant in the brain.
Background References
1. Abrego J. et. al. GOT1-mediated anaplerotic glutamine metabolism regulates chronic acidosis stress in pancreatic cancer cells. Cancer Lett. 2017 Aug 1;400:37-46.
2. Hong C. et. al. Inhibition of GOT1 sensitizes colorectal cancer cells to 5-fluorouracil. Cancer Chemother Pharmacol. 2017 Apr;79(4):835-840.
Sequence Similarity
Belongs to the class-I pyridoxal-phosphate-dependent aminotransferase family.
Western blot analysis of Aspartate Aminotransferase on different lysates with Mouse anti-Aspartate Aminotransferase antibody (EM1901-51) at 1/1,000 dilution.
Lane 1: HeLa cell lysate (20 µg/Lane) Lane 2: K-562 cell lysate (20 µg/Lane) Lane 3: HL-60 cell lysate (20 µg/Lane) Lane 4: Caco-2 cell lysate (20 µg/Lane) Lane 5: Human liver tissue lysate (40 µg/Lane) Lane 6: Mouse liver tissue lysate (40 µg/Lane) Lane 7: Mouse heart tissue lysate (40 µg/Lane) Lane 8: Rat liver tissue lysate (40 µg/Lane) Lane 9: Rat heart tissue lysate (40 µg/Lane)
Lysates/proteins at 10 µg/Lane.
Predicted band size: 46 kDa Observed band size: 38 kDa
Exposure time: 5 seconds;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (EM1901-51) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Mouse IgG - HRP Secondary Antibody (HA1006) at 1/50,000 dilution was used for 1 hour at room temperature.
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