1HXH

COMAMONAS TESTOSTERONI 3BETA/17BETA HYDROXYSTEROID DEHYDROGENASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.22 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Bacterial 3beta/17beta-Hydroxysteroid Dehydrogenase at 1.2 A Resolution: A Model for Multiple Steroid Recognition

Benach, J.Filling, C.Oppermann, U.C.T.Roversi, P.Bricogne, G.Berndt, K.D.Jornvall, H.Ladenstein, R.

(2002) Biochemistry 41: 14659-14668


  • PubMed Abstract: 
  • The enzyme 3beta/17beta-hydroxysteroid dehydrogenase (3beta/17beta-HSD) is a steroid-inducible component of the Gram-negative bacterium Comamonas testosteroni. It catalyzes the reversible reduction/dehydrogenation of the oxo/beta-hydroxy groups at po ...

    The enzyme 3beta/17beta-hydroxysteroid dehydrogenase (3beta/17beta-HSD) is a steroid-inducible component of the Gram-negative bacterium Comamonas testosteroni. It catalyzes the reversible reduction/dehydrogenation of the oxo/beta-hydroxy groups at positions 3 and 17 of steroid compounds, including hormones and isobile acids. Crystallographic analysis at 1.2 A resolution reveals the enzyme to have nearly identical subunits that form a tetramer with 222 symmetry. This is one of the largest oligomeric structures refined at this resolution. The subunit consists of a monomer with a single-domain structure built around a seven-stranded beta-sheet flanked by six alpha-helices. The active site contains a Ser-Tyr-Lys triad, typical for short-chain dehydrogenases/reductases (SDR). Despite their highly diverse substrate specificities, SDR members show a close to identical folding pattern architectures and a common catalytic mechanism. In contrast to other SDR apostructures determined, the substrate binding loop is well-defined. Analysis of structure-activity relationships of catalytic cleft residues, docking analysis of substrates and inhibitors, and accessible surface analysis explains how 3beta/17beta-HSD accommodates steroid substrates of different conformations.


    Organizational Affiliation

    Karolinska Institutet NOVUM, Center for Structural Biochemistry, S-14157 Huddinge, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
3BETA/17BETA-HYDROXYSTEROID DEHYDROGENASE
A, B, C, D
253Comamonas testosteroniEC: 1.1.1.51
Find proteins for P19871 (Comamonas testosteroni)
Go to UniProtKB:  P19871
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.22 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.146 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 80.024α = 90.00
b = 110.595β = 90.00
c = 115.143γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction
AMoREphasing
SHELXL-97refinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-12-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance