The enzyme from Escherichia coli requires Mg2+ or Mn2+. Forms part of an alternative nonmevalonate pathway for terpenoid biosynthesis (for diagram, click here).
The enzyme from Escherichia coli requires Mg2+ or Mn2+. Forms part of an alternative nonmevalonate pathway for terpenoid biosynthesis (for diagram, click here).
spectrophotometric and HPLC-based assay development for determination of product ADP with use of pyruvate kinase and L-lactate dehydrogenase as auxiliary enzymes
CDPME kinase (IspE) catalyzes the phosphorylation of CDPME to 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate (CDPME2P) as part of the MEP pathway, overview. In Escherichia coli, no stable complexes of EcIspD/EcIspE, EcIspE/EcIspF, and EcIspD/EcIspE/EcIspF are observed, only the dual mixture of BsIspE and BsIspF seems to merge into a single band, interaction analysis, overview
enzyme catalyses the fourth reaction step of the 2C-methylerythritol 4-phosphate (MEP) pathway for the biosynthesis of isopentenyl pyrophosphate and its isomer dimethylallyl pyrophosphate
the MEP pathway is essential in the malaria parasite Plasmodium falciparum and in most eubacteria, including the causal agents for diverse and serious human diseases like leprosy, bacterial meningitis, various gastrointestinal and sexually transmitted infections, tuberculosis, and certain types of pneumonia
determined by gel filtration, asymmetric unit consists of 2 subunits A and B which assemble with C2 symmetry to form an extended homodimer, but only 4% of the total surface area of the 2 monomers is involved in dimer formation
the enzyme subunit displays the alpha/beta fold characteristic of the galactose kinase/homoserine kinase/mevalonate kinase phosphomevalonate kinase superfamily, arranged into cofactor and substrate-binding domains with the catalytic center positioned in a deep cleft between domains, quarternary structure, overview
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CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
in complex with ADP, to 2.0 A resolution, and comparison with a monoclinic crystal form of a ternary complex of Escherichia coli 4-diphosphocytidyl-2C-methyl-D-erythritol kinase also with two molecules in the asymmetric unit. The molecular packing is different in the two forms. In the asymmetric unit of the triclinic crystal form the substrate-binding sites are occluded by structural elements of the partner, suggesting that the triclinic dimer is an artefact of the crystal lattice. The surface area of interaction in the triclinic form is almost double that observed in the monoclinic form
purified recombinant enzyme in ternary complex with substrate and non-hydrolyzable ATP analogue adenosine 5'-[beta,gamma-imino]triphosphate, i.e. AMP-PNP, 25 mg/ml protein in 50 mM Tris-HCl, pH 7.7, 50 mM NaCl, 3 mM AMP-PNP, and 2 mM substrate 4-(cytidine 5'-phosphate)-2-C-methyl-D-erythritol, hanging drop vapour diffusion method, 0.001 ml protein solution mixed with equal volume of reservoir solution containing 20% polyethylene glycol 8000, 0.2 M magnesium acetate, 0.1 M sodium cacodylate, pH 6.5, and 0.0002 ml of 0.25 sulfo-betaine, cryoprotection at -173°C by 20% glycerol, X-ray diffraction structure determination and analysis at 2.0 A resolution
structure-activity relationship studies with inhibitors 6-(benzylsulfanyl)-2-(2-hydroxyphenyl)-4-oxo-3,4-dihydro-2H-1,3-thiazine-5-carbonitrile and (4E)-3-methyl-4-[(5-phenylfuran-2-yl)methylidene]-1,2-oxazol-5(4H)-one
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PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant His6-tagged enzyme from Escherichia coli strain BL21(DE3) by nickel affinity chromatography, tag cleavage through thrombin, followed by anion exchange chromatography, and gel filtration
Kuzuyama, T.; Takagi, M.; Kaneda, K.; Watanabe, H.; Dairi, T.; Seto, H.
Studies on the nonmevalonate pathway: conversion of 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol to its 2-phospho derivative by 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol kinase
Nonphosphate inhibitors of IspE protein, a kinase in the non-mevalonate pathway for isoprenoid biosynthesis and a potential target for antimalarial therapy
Gimenez-Oya, V.; Villacanas, O.; Fernandez-Busquets, X.; Rubio-Martinez, J.; Imperial, S.
Mimicking direct protein-protein and solvent-mediated interactions in the CDP-methylerythritol kinase homodimer: a pharmacophore-directed virtual screening approach