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EC Number General Information Commentary Reference
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27metabolism isotopic labeling to explore the in vitro and in vivo metabolic fate of the 2-carbon from [2-13C]glycine and [2-13C]serine. As the 2-carbon of glycine and serine is decarboxylated and catabolized via the GCS, the original 13C-labeled 2-carbon is transferred to tetrahydrofolate and yields methylene-tetrahydrofolate in the mitochondria. In hepatoma cell-lines, 2-carbon from glycine is incorporated into deoxythymidine, species of purines (deoxyadenine and deoxyguanine), and methionine 759374
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27metabolism isotopic labeling to explore the in vitro and in vivo metabolic fate of the 2-carbon from [2-13C]glycine and [2-13C]serine. In healthy mice, incorporation of GCS-derived formate from glycine 2-carbon is found in serine, methionine, dTMP, and methylcytosine in bone marrow DNA. Labeled glycine 2-carbon directly incorporates into serine, adenine and guanine (at C2 and C8 of purine) in the cytosol 759374
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27metabolism liver mitochondria actively catalyze the cleavage of glycine into methylene-THF, CO2, and ammonia, but fail to appreciably catalyze CO2 formation from the alpha-carbon of glycine. The one-carbon compound derived from glycine in the avian livers is utilized largely for the synthesis of uric acid. The yields of 14C-hypoxanthine from 14C-glycine, especially from glycine-2-14C, are significantly increased by the addition of mitochondria to the soluble liver fraction, and under these conditions the ratio of the yields of 14C-hypoxanthine from glycine-l-14C and 2-14C rises to 1:2.3 758693
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27metabolism the amino group of glycine is retained in the intermediate and released as ammonia in the second partial reaction catalyzed by T-protein. The formation of ammonia accompanies the stoichiometric formation of 5,10-methylenetetrahydrofolate from the methylene carbon of glycine and tetrahydrofolate. The reaction proceeds through a sequential mechanism. Km values for the intermediate complex and tetrahydrofolate are 2.2 and 50 microM, respectively. In the absence of tetrahydrofolate, T-protein catalyzes the stoichiometric formation of ammonia and formaldehyde from the intermediate although the velocity is extremely low. The addition of tetrahydrofolate increases the rate about 2400fold 759450
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27metabolism the enzyme is one of the four components that form the glycine cleavage complex (GCS), essential for the synthesis of C1 (one-carbon units) for cell metabolism, by the oxidative cleavage of glycine. The glycine cleavage complex (GCS), in cooperation with GCA (serine hydroxymethyltransferase) regulates the endogenous levels of glycine and C1 units in the cell. This system comprises four loosely associated proteins, namely GcvP (a pyridoxal phosphate-containing protein), GcvH (a protein that carries aminomethyl intermediate), GcvT (protein required for tetrahydrofolate-dependent reaction) and GcvL (a lipoamide dehydrogenase). GcvP decarboxylates glycine and relocates the remaining methylamine moiety to the lipoyl group of GcvH 764259
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27physiological function construction of a genome-scale model of human cell metabolism to investigate the potential metabolic alterations in cells using net zero ATP glycolysis. A pathway for ATP generation involves reactions from serine biosynthesis, one-carbon metabolism and the glycine cleavage system, and is transcriptionally upregulated in an inducible murine model of Myc-driven liver tumorigenesis. This pathway has a predicted two-fold higher flux rate in cells using net zero ATP glycolysis than those using standard glycolysis and generates twice as much ATP with significantly lower rate of lactate, but higher rate of alanine secretion 760049
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27physiological function deletion of the gcvT homolog, i.e. T-protein, in attenuated and virulent Francisella tularensis strains. Deletion mutants are auxotrophic for serine but behave similar to wild-type strains with respect to host cell invasion, intracellular replication, and stimulation of TNFalpha. The glycine cleavage system is required for the pathogenesis of virulent Francisella tularensis in a murine model. Deletion of the gcvT gene delays mortality and lowers bacterial burden, particularly in the liver and bloodstream 759738
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27physiological function glycine cleavage system and cAMP receptor protein coregulate Cas3 of the CRISPR/Cas system and contribute to the defence against invasive genetic elements. Silencing of the glycine cleavage system encoded by the gcvTHP operon reduces Cas3 expression. Addition of N5,N10-methylene tetrahydrofolate activates Cas3 expression. A cAMP receptor protein encoded by Crp activates Cas3 expression via binding to the Cas3 promoter in response to cAMP concentration. The glycine cleavage system regulates Cas3 through association with cAMP receptor protein 760231
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27physiological function H-protein of the glycine cleavage system localizes into vesicles in the cell of Trimastix. When overexpressed in yeast, H- and P-protein are transported into mitochondrion. The first 16 amino acids of H-protein are necessary for this transport 760050
Show all pathways known for 1.4.1.27Display the word mapDisplay the reaction diagram Show all sequences 1.4.1.27physiological function in an LpdA deletion mutant, inducible GCV enzyme activity is not detected. A D-3-phosphoglycerate dehydrogenase SerA/LpdA double mutant is unable to utilize glycine as a serine source and lacks detectable GCV enzyme activity 759421
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