Molecular and Cellular Biochemistry

, Volume 411, Issue 1–2, pp 35–42 | Cite as

Human dehydrogenase/reductase (SDR family) member 8 (DHRS8): a description and evaluation of its biochemical properties

  • Tereza Lundová
  • Hana Štambergová
  • Lucie Zemanová
  • Markéta Svobodová
  • Jana Havránková
  • Miroslav Šafr
  • Vladimír Wsól
Article

Abstract

Dehydrogenase/reductase (SDR family) member 8 (DHRS8, SDR16C2) belongs to the short-chain dehydrogenase/reductase (SDR) superfamily, one of the largest enzyme groups. In addition to the well-known members which participate in the metabolism of important eobiotics and xenobiotics, this superfamily contains many poorly characterized proteins. DHRS8 is a member of the Multisubstrate NADP(H)-dependent SDR16C family, which generally contains insufficiently described enzymes. Despite the limited knowledge about DHRS8, preliminary indicators have emerged regarding its significant function in the modulation of steroidal activity, at least in the case of 3α-adiol, lipid metabolism and detoxification. The aim of this study was to describe additional biochemical properties of DHRS8 and to unify knowledge about this enzyme. The DHRS8 was prepared in recombinant form and its membrane topology in the endoplasmic reticulum as an integral protein with cytosolic orientation was demonstrated. The enzyme participates in the NAD+-dependent oxidation of steroid hormones as β-estradiol and testosterone in vitro; apparent K m and V max values were 39.86 µM and 0.80 nmol × mg−1 × min−1 for β-estradiol and 1207.29 µM and 3.45 nmol × mg−1 × min−1 for testosterone. Moreover, synthetic steroids (methyltestosterone and nandrolone) used as anabolics as well as all-trans-retinol were for the first time identified as substrates of DHRS8. This knowledge of its in vitro activity together with a newly described expression pattern at the protein level in tissues involved in steroidogenesis (adrenal gland and testis) and detoxification (liver, lung, kidney and small intestine) could suggest a potential role of DHRS8 in vivo.

Keywords

DHRS8 SDR16C2 17β-HSD11 Expression Membrane topology Enzyme activity 

Abbreviations

SDR

Short-chain dehydrogenases/reductases

DHRS8

Dehydrogenase/reductase (SDR family) member 8

17β-HSD11

17β-Hydroxysteroid dehydrogenase type 11

retSDR2

Retinal short-chain dehydrogenase/reductase 2

Sf9-Mi-DHRS8

Sf9 microsomes containing overexpressed DHRS8

3α-diol

5α-Androstane-3α,17β-diol

a-dione

4-Androstene-3,17-dione

ER

Endoplasmic reticulum

TM

Transmembrane

Notes

Acknowledgments

This project was supported by the Grant Agency of Charles University (Grant No. 677012/C/2012), the European Social Fund and the state budget of the Czech Republic (TEAB, project no. CZ.1.07/2.3.00/20.0235) and the Charles University project SVV 260 186. We would like to thank Prof. Udo Oppermann (SGC, University of Oxford, UK) for providing DHRS8 cDNA. We thank Daniel Sampey, MFA for his help with the English language editing.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Tereza Lundová
    • 1
  • Hana Štambergová
    • 1
  • Lucie Zemanová
    • 1
  • Markéta Svobodová
    • 1
  • Jana Havránková
    • 1
  • Miroslav Šafr
    • 2
  • Vladimír Wsól
    • 1
  1. 1.Department of Biochemical Sciences, Faculty of Pharmacy in Hradec KrálovéCharles University in PragueHradec KrálovéCzech Republic
  2. 2.Institute of Legal Medicine, Faculty of MedicineCharles University and University Hospital in Hradec KrálovéHradec KrálovéCzech Republic

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