Structural role for Tyr-104 in Escherichia coli isopentenyl-diphosphate isomerase: site-directed mutagenesis, enzymology, and protein crystallography.
de Ruyck, J., Durisotti, V., Oudjama, Y., Wouters, J.(2006) J Biol Chem 281: 17864-17869
- PubMed: 16617181 
- DOI: 10.1074/jbc.M601851200
- Primary Citation of Related Structures:  
1R67, 2B2K, 2G73, 2G74 - PubMed Abstract: 
Isopentenyl-diphosphate (IPP):dimethylallyl diphosphate isomerase is a key enzyme in the biosynthesis of isoprenoids. The mechanism of the isomerization reaction involves protonation of the unactivated carbon-carbon double bond in the substrate, but identity of the acidic moiety providing the proton is still not clear ...