Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 

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The structure of a complex of human 17beta-hydroxysteroid dehydrogenase with estradiol and NADP+ identifies two principal targets for the design of inhibitors.

Breton, R.Housset, D.Mazza, C.Fontecilla-Camps, J.C.

(1996) Structure 4: 905-915

  • DOI: https://doi.org/10.1016/s0969-2126(96)00098-6
  • Primary Citation of Related Structures:  
    1FDS, 1FDT

  • PubMed Abstract: 

    The steroid hormone 17beta-estradiol is important in the genesis and development of human breast cancer. Its intracellular concentration is regulated by 17beta-hydroxysteroid dehydrogenase, which catalyzes the reversible reduction of estrone to 17beta-estradiol. This enzyme is thus an important target for inhibitor design. The precise localization and orientation of the substrate and cofactor in the active site is of paramount importance for the design of such inhibitors, and for an understanding of the catalytic mechanism. The structure of recombinant human 17beta-hydroxysteroid dehydrogenase of type 1 (17beta-HSD1) in complex with estradiol at room temperature has been determined at 1.7 A resolution, and a ternary 17betaHSD1-estradiol-NADP+ complex at -150 degrees C has been solved and refined at 2.20 A resolution. The structures show that estradiol interacts with the enzyme through three hydrogen bonds (involving side chains of Ser142, Tyr155 and His221), and hydrophobic interactions between the core of the steroid and nine other residues. The NADP+ molecule binds in an extended conformation, with the nicotinamide ring close to the estradiol molecule. From the structure of the complex of the enzyme with the substrate and cofactor of the oxidation reaction, the orientation of the substrates for the reduction reaction can be deduced with confidence. A triangular hydrogen-bond network between Tyr155, Ser142 and O17 from estradiol probably facilitates the deprotonation of the reactive tyrosine, while the conserved Lys159 appears not to be directly involved in catalysis. Both the steroid-binding site and the NADPH-binding site can be proposed as targets for the design of inhibitors.

  • Organizational Affiliation

    Laboratoire de Cristallographie et Cristallogenése des Protéines, Institut de Biologie Structurale J.-P. Ebel, CEA - CNRS 41, avenue des Martyrs, F-38027 Grenoble cedex, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
17-BETA-HYDROXYSTEROID-DEHYDROGENASE327Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P14061 (Homo sapiens)
Explore P14061 
Go to UniProtKB:  P14061
PHAROS:  P14061
GTEx:  ENSG00000108786 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14061
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EST

Download Ideal Coordinates CCD File 
C18 H24 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.33α = 90
b = 44.84β = 98.84
c = 60.96γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
MOSFLMdata reduction
CCP4data scaling
ROTAVATAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description
  • Version 1.4: 2024-04-03
    Changes: Refinement description