Abstract
The YgbP protein of Escherichia coli encodes the enzyme 4-diphosphocytidyl-2-C-methylerythritol (CDP-ME) synthetase, a member of the cytidyltransferase family of enzymes. CDP-ME is an intermediate in the mevalonate-independent pathway for isoprenoid biosynthesis in a number of prokaryotic organisms, algae, the plant plastids and the malaria parasite. Because vertebrates synthesize isoprenoid precursors using a mevalonate pathway, CDP-ME synthetase and other enzymes of the mevalonate-independent pathway for isoprenoid production represent attractive targets for the structure-based design of selective antibacterial, herbicidal and antimalarial drugs. The high-resolution structures of E. coli CDP-ME synthetase in the apo form and complexed with both CTP–Mg2+ and CDP-ME–Mg2+ reveal the stereochemical principles underlying both substrate and product recognition as well as catalysis in CDP-ME synthetase. Moreover, these complexes represent the first experimental structures for any cytidyltransferase with both substrates and products bound.
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Acknowledgements
This work is based in part on research conducted at the Stanford Synchrotron Radiation Laboratory (SSRL), which is funded by the Department of Energy (BES, BER) and the National Institutes of Health (NCRR, NIGMS). We thank the staffs of the SSRL crystallographic beam lines (7-1, 7-2 and 9-2) and members of the Noel laboratory for technical assistance. This work was supported by grants from the Philippe Foundation Inc. to S.B.R. and the NIH (NIGMS) to J.P.N. and to D.E.C.
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Richard, S., Bowman, M., Kwiatkowski, W. et al. Structure of 4-diphosphocytidyl-2-C- methylerythritol synthetase involved in mevalonate- independent isoprenoid biosynthesis. Nat Struct Mol Biol 8, 641–648 (2001). https://doi.org/10.1038/89691
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DOI: https://doi.org/10.1038/89691
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