Carbamoyl-phosphate synthase L chain, ATP binding domain
Carbamoyl-phosphate synthase catalyses the ATP-dependent synthesis of carbamyl-phosphate from glutamine or ammonia and bicarbonate. This important enzyme initiates both the urea cycle and the biosynthesis of arginine and/or pyrimidines [2]. The c ...
Carbamoyl-phosphate synthase catalyses the ATP-dependent synthesis of carbamyl-phosphate from glutamine or ammonia and bicarbonate. This important enzyme initiates both the urea cycle and the biosynthesis of arginine and/or pyrimidines [2]. The carbamoyl-phosphate synthase (CPS) enzyme in prokaryotes is a heterodimer of a small and large chain. The small chain promotes the hydrolysis of glutamine to ammonia, which is used by the large chain to synthesise carbamoyl phosphate. See Pfam:PF00988. The small chain has a GATase domain in the carboxyl terminus. See Pfam:PF00117. The ATP binding domain (this one) has an ATP-grasp fold.
This domain is structurally related to the PreATP-grasp domain. The family contains the N-terminus of biotin carboxylase enzymes [1,3], and propionyl-CoA carboxylase A chain [2].
Biotin carboxylase is a component of the acetyl-CoA carboxylase multi-component enzyme which catalyses the first committed step in fatty acid synthesis in animals, plants and bacteria. Most of the active site residues reported in reference [1] are in ...
Biotin carboxylase is a component of the acetyl-CoA carboxylase multi-component enzyme which catalyses the first committed step in fatty acid synthesis in animals, plants and bacteria. Most of the active site residues reported in reference [1] are in this C-terminal domain.
This domain is found in the biotin-containing alpha subunit of the Methylcrotonyl-CoA carboxylase complex (MCC) from Pseudomonas aeruginosa (Swiss:Q9I299) and similar proteins. MCC is essential for the metabolism of leucine. The alpha subunit is orga ...
This domain is found in the biotin-containing alpha subunit of the Methylcrotonyl-CoA carboxylase complex (MCC) from Pseudomonas aeruginosa (Swiss:Q9I299) and similar proteins. MCC is essential for the metabolism of leucine. The alpha subunit is organised into the N-terminal biotin carboxylase (BC), the C-terminal biotin carboxyl carrier protein (BCCP) domains, and a domain that mediates BC-CT interactions (BT domain, this entry). This domain shows a central alpha-helix surrounded by a seven-stranded, highly-twisted anti-parallel beta-sheet, with an overall structure that has great similarity with the beta-barrel of the BT domain of the human MCC [1].
