digitalis/progesterone

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Progesterone 5β-reductase genes of the Brassicaceae family as function-associated molecular markers.

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This study aimed to define progesterone 5β-reductases (P5βR, EC 1.3.99.6, enone 1,4-reductases) as function-associated molecular markers at the plant family level. Therefore cDNAs were isolated from 25 Brassicaceae species, including two species, Erysimum crepidifolium and Draba aizoides, known to

Characterization and localization of progesterone 5 alpha-reductase from cell cultures of foxglove (Digitalis lanata EHRH).

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Progesterone 5 alpha-reductase, which catalyses the reduction of progesterone to 5 alpha-pregnane-3,20-dione, was isolated and characterized from cell cultures of Digitalis lanata (foxglove). Optimum enzyme activity was observed at pH 7.0, and the enzyme had an apparent Km value of 30 microM for its

Molecular cloning and expression of progesterone 5beta-reductase (5beta-POR) from Isoplexis canariensis.

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A full-length cDNA clone that encodes progesterone 5beta-reductase (5beta-POR, EC 1.3.1.3) was isolated from ISOPLEXIS CANARIENSIS leaves. The reading frame of the IC5beta-POR gene is 1170 nucleotides corresponding to 389 amino acids. The SPHI /SALI IC5beta-POR fragment was cloned into the pQE

Progesterone 5β-reductases/iridoid synthases (PRISE): gatekeeper role of highly conserved phenylalanines in substrate preference and trapping is supported by molecular dynamics simulations.

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Vein Patterning 1 (VEP1)-encoded progesterone 5β-reductases/iridoid synthases (PRISE) belong to the short-chain dehydrogenase/reductase superfamily of proteins. They are characterized by a set of highly conserved amino acids in the substrate-binding pocket. All PRISEs are capable of reducing the

Progesterone 5β-reductase of Erysimum crepidifolium: cDNA cloning, expression in Escherichia coli, and reduction of enones with the recombinant protein.

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Ielogoties Reģistrēties

Erysimum is a genus of the Brassicaceae family closely related to the genus Arabidopsis. Several Erysimum species accumulate 5β-cardenolides. Progesterone 5β-reductases (P5βRs) first described in Digitalis species are thought to be involved in 5β-cardenolide biosynthesis. P5βRs belong to the

Vein Patterning 1-encoded progesterone 5β-reductase: activity-guided improvement of catalytic efficiency.

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Ielogoties Reģistrēties

Progesterone 5β-reductases (P5βR; EC 1.3.99.6) encoded by Vein Patterning 1 (VEP1) genes are capable of reducing the CC double-bond of a variety of enones enantioselectively. Sequence and activity data of orthologous P5βRs were used to define a set of residues possibly responsible for the large

The crystal structure of progesterone 5beta-reductase from Digitalis lanata defines a novel class of short chain dehydrogenases/reductases.

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Ielogoties Reģistrēties

Progesterone 5beta-reductase (5beta-POR) catalyzes the stereospecific reduction of progesterone to 5beta-pregnane-3,20-dione and is a key enzyme in the biosynthetic pathway of cardenolides in Digitalis (foxglove) plants. Sequence considerations suggested that 5beta-POR is a member of the short chain

PRISEs (progesterone 5β-reductase and/or iridoid synthase-like 1,4-enone reductases): Catalytic and substrate promiscuity allows for realization of multiple pathways in plant metabolism.

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Ielogoties Reģistrēties

PRISEs (progesterone 5β-reductase and/or iridoid synthase-like 1,4-enone reductases) are involved in cardenolide and iridoid biosynthesis. We here investigated a PRISE (rAtSt5βR) from Arabidopsis thaliana, a plant producing neither cardenolides nor iridoids. The structure of rAtSt5βR was elucidated

The VEP1 gene (At4g24220) encodes a short-chain dehydrogenase/reductase with 3-oxo-Delta4,5-steroid 5beta-reductase activity in Arabidopsis thaliana L.

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Ielogoties Reģistrēties

The Arabidopsis thaliana VEP1 gene product shows about 70% sequence identity to Digitalis lanata progesterone 5beta-reductase, an enzyme considered to catalyze a key step in the biosynthesis of cardiac glycosides. A. thaliana does not accumulate cardenolides but protein extracts prepared from its

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