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Role of AGAT during creatine synthesis [1] Transamidination reaction mechanism of AGAT [1] L-Arginine:glycine amidinotransferase (AGAT; EC 2.1.4.1) is the enzyme that catalyses the transfer of an amidino group from L-arginine to glycine. The products are L-ornithine and glycocyamine, also known as guanidinoacetate, the immediate precursor of ...
2628 67092 Ensembl ENSG00000171766 ENSMUSG00000027199 UniProt P50440 Q9D964 RefSeq (mRNA) NM_001482 NM_001321015 NM_025961 RefSeq (protein) NP_001307944 NP_001473 NP_080237 Location (UCSC) Chr 15: 45.36 – 45.4 Mb Chr 2: 122.42 – 122.44 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Glycine amidinotransferase, mitochondrial is an enzyme that in humans is encoded by the GATM gene ...
In the first step of the biosynthesis, the enzyme arginine:glycine amidinotransferase (AGAT, EC:2.1.4.1) mediates the reaction of glycine and arginine to form guanidinoacetate. This product is then methylated by guanidinoacetate N-methyltransferase (GAMT, EC:2.1.1.2), using S-adenosyl methionine as the methyl donor.
Arginine:glycine amidinotransferase deficiency or AGAT deficiency is an autosomal recessive cerebral creatine deficiency caused by a deficiency of the enzyme arginine:glycine amidinotransferase. This enzyme deficiency results in decreased creatine synthesis, and is caused by biallelic pathogenic variants in GATM .
In enzymology, a scyllo-inosamine-4-phosphate amidinotransferase (EC 2.1.4.2) is an enzyme that catalyzes the chemical reaction. L-arginine + 1-amino-1-deoxy-scyllo-inositol 4-phosphate L-ornithine + 1-guanidino-1-deoxy-scyllo-inositol 4-phosphate
Glycocyamine is formed in the mammalian organism primarily in the kidneys by transferring the guanidine group of L-arginine by the enzyme L-Arg:Gly-amidinotransferase (AGAT) to the amino acid glycine. From L-arginine, ornithine is thus produced, which is metabolized in the urea cycle by carbamoylation to citrulline.
This enzyme normally acts through the transfer of an amidino group from arginine to glycine, resulting in formation of guanidinoacetic acid, which is subsequently methylated by guanidinoacetate methyltransferase (GAMT) to form creatine. However, glycine amidinotransferase (AGAT) sometimes acts by using lysine instead of glycine in the reaction ...
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