1H47

Structures of MECP synthase in complex with (i) CMP and (ii) CMP and product

Summary for 1H47

• Entry DOI: 10.2210/pdb1h47/pdb
• Related: 1GX1 1H48 1JY8 1KNJ 1KNK 1U3L 1U3P 1U40 1U43
• Descriptor: 2C-METHYL-D-ERYTHRITOL-2,4-CYCLODIPHOSPHATE SYNTHASE, GERANYL DIPHOSPHATE, ZINC ION, ... (5 entities in total)
• Functional Keywords: synthase, isoprenoid, lyase, isoprene biosynthesis
• Biological source: ESCHERICHIA COLI
• Total number of polymer chains: 6
• Total formula weight: 105936.88

Authors

Kemp, L.E.,Alphey, M.S.,Bond, C.S.,Hunter, W.N. (deposition date: 2003-02-24, release date: 2004-10-22, Last modification date: 2023-12-13)

Primary citation

Kemp, L.E.,Alphey, M.S.,Bond, C.S.,Ferguson, M.,Hecht, S.,Bacher, A.,Eisenreich, W.,Rohdich, F.,Hunter, W.N.
The Identification of Isoprenoids that Bind in the Intersubunit Cavity of Escherichia Coli 2C-Methyl-D-Erythritol-2,4-Cyclodiphosphate Synthase by Complementary Biophysical Methods
Acta Crystallogr.,Sect.D, 61:45-, 2005

PubMed Abstract: The discovery of a distinct metabolic pathway, the non-mevalonate or 1-deoxy-D-xylulose-5-phosphate (DOXP) pathway for isoprenoid precursor biosynthesis, in eubacteria and apicomplexan parasites has revealed a new set of potential drug targets. The emphasis of research on this pathway has been on delineating the intermediates and the biochemical and structural characterization of component enzymes. Two new monoclinic crystal forms of recombinant Escherichia coli 2C-methyl-D-erythritol-2,4-cyclodiphosphate (MECP) synthase cocrystallized with (i) CMP and (ii) CMP and MECP show well defined electron density at the subunit interface suggestive of an isoprenoid-like ligand. 31P NMR analysis of the recombinant protein sample indicates the presence of bound diphosphate species and electrospray mass spectrometry identifies a mixture of isopentenyl diphosphate (and/or dimethylallyl diphosphate), geranyl diphosphate and farnesyl diphosphate in an approximate ratio of 1:4:2. The most prevalent species, geranyl diphosphate, was successfully modelled into the electron density, revealing the important protein-ligand interactions that stabilize binding of the isoprenoid. The observation that MECP synthase binds three metabolites that are produced by enzymes two, three and four stages downstream in isoprenoid biosynthesis suggests that feedback regulation of the non-mevalonate pathway is possible.

PubMed: 15608374
DOI: 10.1107/S0907444904025971

Experimental method

X-RAY DIFFRACTION (1.99 Å)