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Structural and Functional Biology of Aldo-Keto Reductase Steroid-Transforming Enzymes.


ABSTRACT: Aldo-keto reductases (AKRs) are monomeric NAD(P)(H)-dependent oxidoreductases that play pivotal roles in the biosynthesis and metabolism of steroids in humans. AKR1C enzymes acting as 3-ketosteroid, 17-ketosteroid, and 20-ketosteroid reductases are involved in the prereceptor regulation of ligands for the androgen, estrogen, and progesterone receptors and are considered drug targets to treat steroid hormone-dependent malignancies and endocrine disorders. In contrast, AKR1D1 is the only known steroid 5?-reductase and is essential for bile-acid biosynthesis, the generation of ligands for the farnesoid X receptor, and the 5?-dihydrosteroids that have their own biological activity. In this review we discuss the crystal structures of these AKRs, their kinetic and catalytic mechanisms, AKR genomics (gene expression, splice variants, polymorphic variants, and inherited genetic deficiencies), distribution in steroid target tissues, roles in steroid hormone action and disease, and inhibitor design.

SUBMITTER: Penning TM 

PROVIDER: S-EPMC6405412 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Structural and Functional Biology of Aldo-Keto Reductase Steroid-Transforming Enzymes.

Penning Trevor M TM   Wangtrakuldee Phumvadee P   Auchus Richard J RJ  

Endocrine reviews 20190401 2


Aldo-keto reductases (AKRs) are monomeric NAD(P)(H)-dependent oxidoreductases that play pivotal roles in the biosynthesis and metabolism of steroids in humans. AKR1C enzymes acting as 3-ketosteroid, 17-ketosteroid, and 20-ketosteroid reductases are involved in the prereceptor regulation of ligands for the androgen, estrogen, and progesterone receptors and are considered drug targets to treat steroid hormone-dependent malignancies and endocrine disorders. In contrast, AKR1D1 is the only known ste  ...[more]

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