Download MendeleyExpanding the Nucleotide and Sugar 1-Phosphate Promiscuity of Nucleotidyltransferase RmlA via Directed Evolution.
Moretti, R., Chang, A., Peltier-Pain, P., Bingman, C.A., Phillips, G.N., Thorson, J.S.(2011) J Biol Chem 286: 13235-13243
- PubMed: 21317292
- DOI: https://doi.org/10.1074/jbc.M110.206433
- Primary Citation of Related Structures:
3PKP, 3PKQ - PubMed Abstract:
Directed evolution is a valuable technique to improve enzyme activity in the absence of a priori structural knowledge, which can be typically enhanced via structure-guided strategies. In this study, a combination of both whole-gene error-prone polymerase chain reaction and site-saturation mutagenesis enabled the rapid identification of mutations that improved RmlA activity toward non-native substrates. These mutations have been shown to improve activities over 10-fold for several targeted substrates, including non-native pyrimidine- and purine-based NTPs as well as non-native D- and L-sugars (both α- and β-isomers). This study highlights the first broadly applicable high throughput sugar-1-phosphate nucleotidyltransferase screen and the first proof of concept for the directed evolution of this enzyme class toward the identification of uniquely permissive RmlA variants.
Organizational Affiliation:
Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, USA.
