Biomaterial Database

Three-dimensional structure of carbamoyl phosphate and succinate bound to aspartate carbamoyltransferase. 1988

J E Gouaux, and W N Lipscomb

Gibbs Chemical Laboratory, Harvard University, Cambridge, MA 02138.

The three-dimensional structure of the ternary complex of carbamoyl phosphate, succinate, and aspartate carbamoyltransferase (EC 2.1.3.2) has been determined to 2.6-A resolution. The binding of the phosphate of carbamoyl phosphate is similar to the binding of the phosphonate of N-(phosphonoacetyl)-L-aspartate (PALA); interacting with the carboxylates of succinate are some of the same residues that interact with the carboxylates of PALA. The amino group of carbamoyl phosphate donates hydrogen bonds to the main-chain carbonyls of residues Pro-266 and Leu-267 and the side-chain carbonyl of Gln-137. In comparing the structure of the active sites in the PALA-enzyme complex to the active sites in the carbamoyl phosphate-succinate-enzyme complex, we find that they are similar.

UI	MeSH Term	Description	Entries
D008958	Models, Molecular	Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.	Molecular Models,Model, Molecular,Molecular Model
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
D011487	Protein Conformation	The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).	Conformation, Protein,Conformations, Protein,Protein Conformations
D002219	Carbamates	Derivatives of carbamic acid, H2NC(	Carbamate,Aminoformic Acids,Carbamic Acids,Acids, Aminoformic,Acids, Carbamic
D002221	Carbamyl Phosphate	The monoanhydride of carbamic acid with PHOSPHORIC ACID. It is an important intermediate metabolite and is synthesized enzymatically by CARBAMYL-PHOSPHATE SYNTHASE (AMMONIA) and CARBAMOYL-PHOSPHATE SYNTHASE (GLUTAMINE-HYDROLYZING).	Carbamoyl Phosphate,Dilithium Carbamyl Phosphate,Carbamyl Phosphate, Dilithium,Phosphate, Carbamoyl,Phosphate, Carbamyl,Phosphate, Dilithium Carbamyl
D001221	Aspartate Carbamoyltransferase	An enzyme that catalyzes the conversion of carbamoyl phosphate and L-aspartate to yield orthophosphate and N-carbamoyl-L-aspartate. (From Enzyme Nomenclature, 1992) EC 2.1.3.2.	Aspartate Transcarbamylase,Co(II)-Aspartate Transcarbamoylase,Ni(II)-Aspartate Transcarbamoylase,Carbamoyltransferase, Aspartate,Transcarbamylase, Aspartate
D001665	Binding Sites	The parts of a macromolecule that directly participate in its specific combination with another molecule.	Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining
D013386	Succinates	Derivatives of SUCCINIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain a 1,4-carboxy terminated aliphatic structure.	Succinic Acids,Acids, Succinic
D014961	X-Ray Diffraction	The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Xray Diffraction,Diffraction, X-Ray,Diffraction, Xray,Diffractions, X-Ray,Diffractions, Xray,X Ray Diffraction,X-Ray Diffractions,Xray Diffractions
D019802	Succinic Acid	A water-soluble, colorless crystal with an acid taste that is used as a chemical intermediate, in medicine, the manufacture of lacquers, and to make perfume esters. It is also used in foods as a sequestrant, buffer, and a neutralizing agent. (Hawley's Condensed Chemical Dictionary, 12th ed, p1099; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1851)	Potassium Succinate,Succinate,1,2-Ethanedicarboxylic Acid,1,4-Butanedioic Acid,Ammonium Succinate,Butanedioic Acid,1,2 Ethanedicarboxylic Acid,1,4 Butanedioic Acid,Succinate, Ammonium,Succinate, Potassium