Download MendeleyCharacterization of a Glyphosate-Tolerant Enzyme from Streptomyces svecius : A Distinct Class of 5-Enolpyruvylshikimate-3-phosphate Synthases.
Griffin, S.L., Chekan, J.R., Lira, J.M., Robinson, A.E., Yerkes, C.N., Siehl, D.L., Wright, T.R., Nair, S.K., Cicchillo, R.M.(2021) J Agric Food Chem 69: 5096-5104
- PubMed: 33826316
- DOI: https://doi.org/10.1021/acs.jafc.1c00439
- Primary Citation of Related Structures:
7M0O - PubMed Abstract:
Natural and modified versions of the 5-enolpyruvylshikimate-3-phosphate synthase ( epsps ) gene have been used to confer tolerance to the broad-spectrum herbicide glyphosate in a variety of commercial crops. The most widely utilized trait was obtained from the Agrobacterium tumefaciens strain CP4 and has been commercialized in several glyphosate-tolerant crops. The EPSPS gene products are enzymes that have been divided into three classes based on sequence similarity, sensitivity to glyphosate, and steady-state catalytic parameters. Herein, we describe the informatics-guided identification and biochemical and structural characterization of a novel EPSPS from Streptomyces sviceus (DGT-28 EPSPS). The data suggest DGT-28 EPSPS and other closely related homologues exemplify a distinct new class (Class IV) of EPSPS enzymes that display intrinsic tolerance to high concentrations of glyphosate ( K i ≥ 5000 μM). We further demonstrate that dgt-28 epsps , when transformed into stable plants, provides robust (≥4× field rates) vegetative/reproductive herbicide tolerance and has utility in weed-control systems comparable to that of commercialized events.
Organizational Affiliation:
Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States.
