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Rat GPT1 / GPT Protein (His Tag)

Gpt1, Gpt, ALT1

Catalog Number P80001-R08B
Organism Species Rat
Host Baculovirus-Insect Cells
Synonyms Gpt1, Gpt, ALT1
Molecular Weight The recombinant rat Gpt1 comprises 506 amino acids with a predicted molecular mass of 55 kDa. It migrates as an approximately 48 kDa band in reduced SDS-PAGE.
predicted N Met 1
SDS-PAGE
Purity > 95 % as determined by SDS-PAGE
Protein Construction A DNA sequence encoding the rat Gpt1 (NP_112301.1) (Met 1-Ser 496) with a C-terminal polyhistidine tag was expressed.
Bio-activity
Research Area Signaling |Signal Transduction |Metabolism |Amino Acids
Formulation Lyophilized from sterile 50mM Tris, 100mM NaCl, pH 8.0, 10% glycerol, 0.5mM TCEP
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background Alanine aminotransferase (ALT), also known as glutamate pyruvate transaminase (GPT), is a pyridoxal enzyme which belongs to the class-I pyridoxal-phosphate-dependent aminotransferase family, Alanine aminotransferase subfamily. Gpt / Gpt1 / ALT catalyses the reversible interconversion of L-alanine and 2-oxoglutalate to pyruvate and L-glutamate, and plays a key role in the intermediary metabolism of glucose and amino acids. Gpt / Gpt1 / ALT is expressed in Liver, kidney, heart, and skeletal muscles and it expresses at moderate levels in the adipose tissue. As a key enzyme for gluconeogenesis, Gpt is a widely-used serum marker for liver injury. Two ALT isoenzymes have been identified, ALT1 and ALT2 (GPT1 and GPT2), which are encoded by separate genes and share significant sequence homology, but differ in their expression patterns. GPT1/GPT is widely distributed and mainly expressed in intestine, liver, fat tissues, colon, muscle, and heart, in the order of high to low expression level. Serum activity levels of this enzyme are routinely used as a biomarker of liver injury caused by drug toxicity, infection, alcohol, and steatosis.
Reference
  • Bergmeyer HU, et al. (1978) Optimization of methods for aspartate aminotransferase and alanine aminotransferase. Clin Chem. 24(1): 58-73.
  • King MC, et al. (1980) Allele increasing susceptibility to human breast cancer may be linked to the glutamate-pyruvate transaminase locus. Science. 208(4442): 406-8.
  • Prati D, et al. (2002) Updated definitions of healthy ranges for serum alanine aminotransferase levels. Ann Intern Med. 137(1): 1-10.