PMID:9260292

Citation	Erskine, PT, Senior, N, Maignan, S, Cooper, J, Lambert, R, Lewis, G, Spencer, P, Awan, S, Warren, M, Tickle, IJ, Thomas, P, Wood, SP and Shoolingin-Jordan, PM (1997) Crystallization of 5-aminolaevulinic acid dehydratase from Escherichia coli and Saccharomyces cerevisiae and preliminary X-ray characterization of the crystals. Protein Sci. 6:1774-6
Abstract	5-Aminolaevulinic acid dehydratase (ALAD) catalyzes the formation of porphobilinogen from two molecules of 5-aminolaevulinic acid. Both Escherichia coli and Saccharomyces cerevisiae ALADs are homo-octameric enzymes which depend on Zn2+ for catalytic activity and are potently inhibited by lead ions. The E. coli enzyme crystallized in space group I422 (unit cell dimensions a = b = 130.7 A, c = 142.4 A). The best crystals were obtained in the presence of the covalently bound inhibitor laevulinic acid. The yeast enzyme (expressed in E. coli) crystallized in the same space group (I422) but with a smaller unit cell volume (a = b = 103.7 A, c = 167.7 A). High resolution synchrotron data sets were obtained from both E. coli and yeast ALAD crystals by cryocooling to 100 K.
Links	PubMed PMC2143773 Online version:10.1002/pro.5560060820
Keywords	Crystallography, X-Ray; Escherichia coli/enzymology; Porphobilinogen Synthase/chemistry; Saccharomyces cerevisiae/enzymology; Species Specificity
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