1H7R
SCHIFF-BASE COMPLEX OF YEAST 5-AMINOLAEVULINIC ACID DEHYDRATASE WITH SUCCINYLACETONE AT 2.0 A RESOLUTION.
Summary for 1H7R
| Entry DOI | 10.2210/pdb1h7r/pdb |
| Related | 1AW5 1H7N 1H7O 1H7P 1QML 1QNV 1YLV |
| Descriptor | 5-AMINOLAEVULINIC ACID DEHYDRATASE, 4,6-DIOXOHEPTANOIC ACID, ZINC ION, ... (4 entities in total) |
| Functional Keywords | lyase, dehydratase, aldolase, tim barrel, tetrapyrrole synthesis |
| Biological source | SACCHAROMYCES CEREVISIAE (BAKER'S YEAST) |
| Total number of polymer chains | 1 |
| Total formula weight | 38008.72 |
| Authors | Erskine, P.T.,Newbold, R.,Brindley, A.A.,Wood, S.P.,Shoolingin-Jordan, P.M.,Warren, M.J.,Cooper, J.B. (deposition date: 2001-07-09, release date: 2001-07-12, Last modification date: 2024-11-20) |
| Primary citation | Erskine, P.T.,Newbold, R.,Brindley, A.A.,Wood, S.P.,Shoolingin-Jordan, P.M.,Warren, M.J.,Cooper, J.B. The X-Ray Structure of Yeast 5-Aminolaevulinic Acid Dehydratase Complexed with Substrate and Three Inhibitors J.Mol.Biol., 312:133-, 2001 Cited by PubMed Abstract: The structures of 5-aminolaevulinic acid dehydratase (ALAD) complexed with substrate (5-aminolaevulinic acid) and three inhibitors: laevulinic acid, succinylacetone and 4-keto-5-aminolaevulinic acid, have been solved at high resolution. The ligands all bind by forming a covalent link with Lys263 at the active site. The structures define the interactions made by one of the two substrate moieties that bind to the enzyme during catalysis. All of the inhibitors induce a significant ordering of the flap covering the active site. Succinylacetone appears to be unique by inducing a number of conformational changes in loops covering the active site, which may be important for understanding the co-operative properties of ALAD enzymes. Succinylacetone is produced in large amounts by patients suffering from the hereditary disease type I tyrosinaemia and its potent inhibition of ALAD also has implications for the pathology of this disease. The most intriguing result is that obtained with 4-keto-5-amino-hexanoic acid, which seems to form a stable carbinolamine intermediate with Lys263. It appears that we have defined the structure of an intermediate of Schiff base formation that the substrate forms upon binding to the P-site of the enzyme. PubMed: 11545591DOI: 10.1006/JMBI.2001.4947 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2 Å) |
Structure validation
Download full validation report
