The Escherichia coli enzyme differs from that from yeast [EC 1.1.1.168 2-dehydropantolactone reductase (Re-specific)], which is specific for the Re-face of NADP+, and in receptor requirements from EC 1.1.99.26 3-hydroxycyclohexanone dehydrogenase.
The Escherichia coli enzyme differs from that from yeast [EC 1.1.1.168 2-dehydropantolactone reductase (Re-specific)], which is specific for the Re-face of NADP+, and in receptor requirements from EC 1.1.99.26 3-hydroxycyclohexanone dehydrogenase.
structural basis of the substrate specificity, overview. Enzyme CPR-C2 adopts a triose-phosphate isomerase barrel fold at the core of the structure. Binding with the cofactor NADPH induces conformational changes in which Thr27 and Lys28 move 15 and 5.0 A, respectively, in the close vicinity of the adenosine 2'-phosphate group of NADPH to form hydrogen bonds, substrate binding modeling
the enzyme does not reduce typical AKR substrates such as 4-nitrobenzaldehyde and pyridine-3-aldehyde, but does reduce alpha-diketones such as ketopantoyl lactone to D-pantoyl lactone in a stereospecific manner
CPR-C1 adopted a triose-phosphate isomerase (TIM) barrel fold at the core of the structure in which Thr25 and Lys26 of the GXGTX motif bind uniquely to the adenosine 2-phosphate group of NADPH. Homology structure modeling, overview
CPR-C1 has 12 alpha-helices, 10 beta-strands, and five 310-helices, and adopts a triose-phosphate isomerase (TIM) barrel fold at the core of the structure in which Thr25 and Lys26 of the GXGTX motif bind uniquely to the adenosine 2-phosphate group of NADPH
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CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
purified enzyme in apoform and in complex with NADPH, mixing of 0.001 ml of 15 mg/ml protein in 20 mM Tris-HCl, pH 8.0, with 0.001 ml of reservoir solution consisting of 0.1 M Tris-HCl, pH 8.1, and 23% w/v PEG 3350 at 20°C, for the enzyme-NADPH complexed crystals, the protein in 20 mM Tris-HCl, pH 8.0, and 5 mM MADPH, is mixed with 0.1 M TrisHCl, pH 7.4, and 256% w/v PEG 3350, X-ray diffraction structure determination and analysis at 1.70 A and 1.80 A resolution, respectively, molecular replacement method
purified enzyme in complex with NADPH, sitting drop vapor diffusion method, mixing of 0.001 ml of 15 mg/ml protein in 20 mM Tris-HCl, pH 8.0, and 5 mM NADPH, with 0.001 ml of reservoir solution containing 0.1 M Tris-HCl, pH 8.5, 25% w/v PEG 3350, and 0.2 M NaCl, 20°C, 2 days, X-ray diffraction structure determination and analysis at 2.20 A resolution, molecular replacement and modeling
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PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
recombinant His-tagged enzyme from Escherichia coli strain Rosetta (DE3) by nickel affinity chromatography, and tag cleavage by thrombin, followed by anion exchange chromatography, gel filtration, and dialysis
isozyme CPR-C2, DNA and amino acid sequence determination and analysis, overexpression of the isozyme in Escherichia coli strain BL21(DE3), addition of IPTG highly decreases the expression rate of the isozyme
isozymes CPR-C1, DNA and amino acid sequence determination and analysis, overexpression of the isozyme in Escherichia coli strain BL21(DE3), addition of IPTG highly decreases the expression rate of the isozyme
Kataoka, M.; Delacruz-Hidalgo, A.R.G.; Akond, M.A.; Sakuradani, E.; Kita, K.; Shimizu, S.
Gene cloning and overexpression of two conjugated polyketone reductases, novel aldo-keto reductase family enzymes, of Candida parapsilosis. Investigation of hydroxamic acids as laccase-mediators for pulp bleaching
Structure of conjugated polyketone reductase from Candida parapsilosis IFO 0708 reveals conformational changes for substrate recognition upon NADPH binding