Article
Tracking the evolution of porphobilinogen synthase metal dependence in vitro.
Journal of molecular biology - 4 Feb 2005
Frère Frederic, Reents Heike, Schubert Wolf-Dieter, Heinz Dirk W, Jahn Dieter
Abstract excerpt
Metal ions are indispensable cofactors for chemical catalysis by a plethora of enzymes. Porphobilinogen synthases (PBGSs), which catalyse the second step of tetrapyrrole biosynthesis, are grouped according to their dependence on Zn(2+). Using site-directed mutagenesis, we embarked on transforming Zn(2+)-independent Pseudomonas aeruginosa PBGS into a Zn(2+)-dependent enzyme. Nine PBGS variants were generated by...
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