Mechanism
Carbamoyl phosphate synthase I is an enzyme found in mitochondrial matrix and it catalyzes the very first reaction of the Urea cycle, in which carbamoyl phosphate is produced.
Carbamoyl Phosphate Synthase 1, abbreviated as CPS1, is activated by its natural activator N-Acetyl glutamate, which in turn is synthesized from acetyl-CoA and glutamic acid in the reaction catalyzed by N-Acetyl glutamate synthase, commonly called NAGS. N-Acetyl Glutamate is required for the Urea cycle to take place.
Deficiency in N-Acetyl Glutamate Synthase or a genetic mutation in the gene coding for the enzyme, will lead to urea cycle failure in which ammonia is not converted to urea, but rather accumulated in blood leading to the condition called Type I Hyperammonemia. This is a severe neonatal disorder with fatal consequences, if not detected immediately upon birth.
Read more about this topic: N-Acetylglutamate Synthase Deficiency
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