Aldo-keto reductase family 1 member C2

Definition

Cytosolic aldo-keto reductase that catalyzes the NADH and NADPH-dependent reduction of ketosteroids to hydroxysteroids. Most probably acts as a reductase in vivo since the oxidase activity measured in vitro is inhibited by physiological concentrations of NADPH. Displays a broad positional specificity acting on positions 3, 17 and 20 of steroids and regulates the metabolism of hormones like estrogens and androgens. Works in concert with the 5-alpha/5-beta-steroid reductases to convert steroid hormones into the 3-alpha/5-alpha and 3-alpha/5-beta-tetrahydrosteroids. Catalyzes the inactivation of the most potent androgen 5-alpha-dihydrotestosterone (5-alpha-DHT) to 5-alpha-androstane-3-alpha,17-beta-diol (3-alpha-diol). Also specifically able to produce 17beta-hydroxy-5alpha-androstan-3-one/5alphaDHT. May also reduce conjugated steroids such as 5alpha-dihydrotestosterone sulfate. Displays affinity for bile acids.

References:

[1]. Frédérick Faucher, et al. Mouse 17alpha-hydroxysteroid dehydrogenase (AKR1C21) binds steroids differently from other aldo-keto reductases: identification and characterization of amino acid residues critical for substrate binding. J Mol Biol. 2007 Jun 1;369(2):525-40. [Content Brief]

[2]. Stephan Steckelbroeck, et al. Human cytosolic 3alpha-hydroxysteroid dehydrogenases of the aldo-keto reductase superfamily display significant 3beta-hydroxysteroid dehydrogenase activity: implications for steroid hormone metabolism and action. J Biol Chem. 2004 Mar 12;279(11):10784-95. [Content Brief]

[3]. Frédérick Faucher, et al. Crystal structures of mouse 17alpha-hydroxysteroid dehydrogenase (apoenzyme and enzyme-NADP(H) binary complex): identification of molecular determinants responsible for the unique 17alpha-reductive activity of this enzyme. J Mol Biol. 2006 Dec 8;364(4):747-63. [Content Brief]

[4]. T M Penning, et al. Human 3alpha-hydroxysteroid dehydrogenase isoforms (AKR1C1-AKR1C4) of the aldo-keto reductase superfamily: functional plasticity and tissue distribution reveals roles in the inactivation and formation of male and female sex hormones. Biochem J. 2000 Oct 1;351(Pt 1):67-77. [Content Brief]

[5]. A Stolz, et al. cDNA cloning and expression of the human hepatic bile acid-binding protein. A member of the monomeric reductase gene family. J Biol Chem. 1993 May 15;268(14):10448-57. [Content Brief]

[6]. A Hara, et al. Relationship of human liver dihydrodiol dehydrogenases to hepatic bile-acid-binding protein and an oxidoreductase of human colon cells. Biochem J. 1996 Jan 15;313 ( Pt 2)(Pt 2):373-6. [Content Brief]

[7]. Yi Jin, et al. Human cytosolic hydroxysteroid dehydrogenases of the aldo-ketoreductase superfamily catalyze reduction of conjugated steroids: implications for phase I and phase II steroid hormone metabolism. J Biol Chem. 2009 Apr 10;284(15):10013-22. [Content Brief]

[8]. Jean-François Couture, et al. Comparison of crystal structures of human type 3 3alpha-hydroxysteroid dehydrogenase reveals an "induced-fit" mechanism and a conserved basic motif involved in the binding of androgen. Protein Sci. 2005 Jun;14(6):1485-97. [Content Brief]

生物医学辞典

生物医学辞典は、生物学の学術用語と専門データの包括的で専門的なデータベースです。すべての説明は、権威ある書籍や高いＩＦの文献に基づいており、知りたい生物医学用語の正確な説明を得ることができます。

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

お名前
メール *

	Sorry, but the email address you supplied was invalid.