title: The crystal structure of dihydrodipicolinate synthase from Escherichia coli with bound pyruvate and succinic acid semialdehyde: unambiguous resolution of the stereochemistry of the condensation product.
abstract: The crystal structure of Escherichia coli dihydrodipicolinate synthase with pyruvate and substrate analogue succinic acid semialdehyde condensed with the active site lysine-161 was solved to a resolution of 2.3 Å. Comparative analysis to a previously reported structure both resolves the configuration at the aldol addition center, where the final addition product clearly displays the (S)-configuration, and the final conformation of the adduct within the active site. Direct comparison to two other crystal structures found in the Protein Data Bank, 1YXC, and 3DU0, demonstrates significant similarity between the active site residues of these structures.
authors.affiliation: School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia. baboug@unimelb.edu.au
authors.forename: Berin A
authors.initials: BA
authors.lastname: Boughton
authors.forename: Renwick C J
authors.initials: RC
authors.lastname: Dobson
authors.forename: Craig A
authors.initials: CA
authors.lastname: Hutton
mesh_terms: D001665:Binding Sites; D020134:Catalytic Domain; D018360:Crystallography, X-Ray; D004926:Escherichia coli; D006836:Hydro-Lyases / Q000737:chemistry*; D008024:Ligands; D011487:Protein Conformation; D055503:Protein Multimerization; D019289:Pyruvic Acid / Q000737:chemistry; D005680:gamma-Aminobutyric Acid / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D008024:Ligands; D005680:gamma-Aminobutyric Acid; D019289:Pyruvic Acid; D006836:Hydro-Lyases; C020040:4-hydroxy-tetrahydrodipicolinate synthase; C009338:succinic semialdehyde