R. Kahn

Publications27
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Citations1,109
Highly Influential Citations32
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CYP94A5, a new cytochrome P450 from Nicotiana tabacum is able to catalyze the oxidation of fatty acids to the omega-alcohol and to the corresponding diacid.
TLDR
A cytochrome P450 able to catalyze the complete set of reactions oxidizing a terminal methyl group to the corresponding carboxyl is described, which is enantioselective: after incubation of a synthetic racemic mixture of 9,10-epoxystearic acid, the chirality of the residual epoxide was 40/60 in favor of 9R,10S enantiomer.
Substrate specificity of the cytochrome P450 enzymes CYP79A1 and CYP71E1 involved in the biosynthesis of the cyanogenic glucoside dhurrin in Sorghum bicolor (L.) Moench.
The two multifunctional cytochrome P450 enzymes, CYP79A1 and CYP71E1, involved in the biosynthesis of the cyanogenic glucoside dhurrin in Sorghum bicolor (L.) Moench have been characterized with…
Quantitation of membrane glycoprotein IIIa on intact human platelets using the monoclonal antibody, AP-3
TLDR
Data derived using AP-3 indicate that significant amounts of free GPIIIa are not present, thereby supporting the hypothesis that GPIIb and GP IIIa exist complexed in a 1:1 stoichiometry in the plasma membrane of intact, nonactivated platelets.
Cloning and expression in Escherichia coli of the obtusifoliol 14 alpha-demethylase of Sorghum bicolor (L.) Moench, a cytochrome P450 orthologous to the sterol 14 alpha-demethylases (CYP51) from…
TLDR
The isolation of a cDNA clone encoding the plant sterol 14 alpha-demethylase, combined with the previously isolated cDNA clones for fungal and mammalian sterol 13 alpha-DEMethylases, provides an important tool in the rational design of specific inhibitors towards the individual sterol 12 alpha-methylases.
Optimized expression and catalytic properties of a wheat obtusifoliol 14α‐demethylase (CYP51) expressed in yeast
TLDR
The wheat enzyme was expressed in yeast strains overexpressing different P450 reductases as a fusion with either yeast or plant (sorghum) membrane targeting sequences and the expression level was fivefold reduced, as the modified yeasts did not need supplementation with exogenous ergosterol and grew normally under aerobic conditions.
Evolutionary relationship and substrate specificity of Arabidopsis thaliana fatty acid omega-hydroxylase
Optimized expression and catalytic properties of a wheat obtusifoliol 14alpha-demethylase (CYP51) expressed in yeast. Complementation of erg11Delta yeast mutants by plant CYP51.
TLDR
This optimized expression system for CYP51 from wheat complemented the ERG11 disruption, as the modified yeasts did not need supplementation with exogenous ergosterol and grew normally under aerobic conditions, and for improving the selectivity of inhibitory molecules.
Quantitation of membrane glycoprotein IIIa on intact human platelets using the monoclonal antibody, AP-3.
TLDR
Data derived using AP-3 indicate that significant amounts of free GPIIIa are not present, thereby supporting the hypothesis that GPIIb and GP IIIa exist complexed in a 1:1 stoichiometry in the plasma membrane of intact, nonactivated platelets.
Isolation and Reconstitution of Cytochrome P450ox and in Vitro Reconstitution of the Entire Biosynthetic Pathway of the Cyanogenic Glucoside Dhurrin from Sorghum
TLDR
In vitro reconstitution of the entire dhurrin biosynthetic pathway from tyrosine was accomplished by the insertion of CYP79 (tyrosine N-hydroxylase), P450ox, and NADPH-P450 oxidoreductase in lipid micelles in the presence of uridine diphosphate glucose glucosyltransferase.
Chapter Six - Function and Evolution of Plant Cytochrome P450
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