AKR1C1

Function

Cytosolic aldo-keto reductase that catalyzes the NADH and NADPH-dependent reduction of ketosteroids to hydroxysteroids (PubMed:19218247). Most probably acts as a reductase in vivo since the oxidase activity measured in vitro is inhibited by physiological concentrations of NADPH (PubMed:14672942). Displays a broad positional specificity acting on positions 3, 17 and 20 of steroids and regulates the metabolism of hormones like estrogens and androgens (PubMed:10998348). May also reduce conjugated steroids such as 5alpha-dihydrotestosterone sulfate (PubMed:19218247). Displays affinity for bile acids (PubMed:8486699).

Pathway

Steroid metabolism.

Sequence Similarities

Belongs to the aldo/keto reductase family.

Tissue Specificity

Expressed in all tissues tested including liver, prostate, testis, adrenal gland, brain, uterus, mammary gland and keratinocytes. Highest levels found in liver, mammary gland and brain.

Cellular localization

• Cytoplasm
• Cytosol

Alternative names

DDH, DDH1, AKR1C1, Aldo-keto reductase family 1 member C1, 20-alpha-hydroxysteroid dehydrogenase, Chlordecone reductase homolog HAKRC, Dihydrodiol dehydrogenase 1, High-affinity hepatic bile acid-binding protein, 20-alpha-HSD, DD1, HBAB

Database links

swissprot:Q04828 omim:600449 entrezGene:1645 swissprot:P52895