A Covalent Succinylcysteine-Like Intermediate in the Enzyme-Catalyzed Transformation of Maleate to Fumarate by Maleate Isomerase.Fisch, F., Fleites, C.M., Delenne, M., Baudendistel, N., Hauer, B., Turkenburg, J.P., Hart, S., Bruce, N.C., Grogan, G.
(2010) J Am Chem Soc 132: 11455
- PubMed: 20677745
- DOI: https://doi.org/10.1021/ja1053576
- Primary Citation of Related Structures:
- PubMed Abstract:
Maleate isomerase (MI), a member of the Asp/Glu racemase superfamily, catalyzes cis-trans isomerization of the C2-C3 double bond in maleate to yield fumarate. Mutational studies, in conjunction with the structure of the C194A mutant of Nocardia farcinica MI cocrystallized with maleate, have revealed an unprecedented mode of catalysis for the superfamily in which the isomerization reaction is initiated by nucleophilic attack of cysteine at the double bond, yielding a covalent succinylcysteine-like intermediate.
York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5YW, United Kingdom.