Crystal structure of Escherichia coli PurE, an unusual mutase in the purine biosynthetic pathway.Mathews, I.I., Kappock, T.J., Stubbe, J., Ealick, S.E.
(1999) Structure 7: 1395-1406
- PubMed: 10574791
- DOI: https://doi.org/10.1016/s0969-2126(00)80029-5
- Primary Citation of Related Structures:
- PubMed Abstract:
Conversion of 5-aminoimidazole ribonucleotide (AIR) to 4-carboxyaminoimidazole ribonucleotide (CAIR) in Escherichia coli requires two proteins - PurK and PurE. PurE has recently been shown to be a mutase that catalyzes the unusual rearrangement of N(5)-carboxyaminoimidazole ribonucleotide (N(5)-CAIR), the PurK reaction product, to CAIR. PurEs from higher eukaryotes are homologous to E. coli PurE, but use AIR and CO(2) as substrates to produce CAIR directly.
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.