4L1X

Crystal Structuer of Human 3-alpha Hydroxysteroid Dehydrogenase Type 3 V54L Mutant in Complex with NADP+ and Progesterone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.142 

Starting Model: experimental
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Literature

Human 3-alpha hydroxysteroid dehydrogenase type 3 (3 alpha-HSD3): The V54L mutation restricting the steroid alternative binding and enhancing the 20 alpha-HSD activity

Zhang, B.Zhu, D.-W.Hu, X.-J.Zhou, M.Shang, P.Lin, S.-X.

(2014) J Steroid Biochem Mol Biol 141: 135-143

  • DOI: https://doi.org/10.1016/j.jsbmb.2014.01.003
  • Primary Citation of Related Structures:  
    4L1W, 4L1X

  • PubMed Abstract: 

    Human 3-alpha hydroxysteroid dehydrogenase type 3 (3α-HSD3) has an essential role in the inactivation of 5α-dihydrotestosterone (DHT). Notably, human 3α-HSD3 shares 97.8% sequence identity with human 20-alpha hydroxysteroid dehydrogenase (20α-HSD) and there is only one amino acid difference (residue 54) that is located in their steroid binding pockets. However, 20α-HSD displays a distinctive ability in transforming progesterone to 20α-hydroxy-progesterone (20α-OHProg). In this study, to understand the role of residue 54 in the steroid binding and discrimination, the V54L mutation in human 3α-HSD3 has been created. We have solved two crystal structures of the 3α-HSD3·NADP(+)·Progesterone complex and the 3α-HSD3 V54L·NADP(+)·progesterone complex. Interestingly, progesterone adopts two different binding modes to form complexes within the wild type enzyme, with one binding mode similar to the orientation of a bile acid (ursodeoxycholate) in the reported ternary complex of human 3α-HSD3·NADP(+)·ursodeoxycholate and the other binding mode resembling the orientation of 20α-OHProg in the ternary complex of human 20α-HSD·NADP(+)·20α-OHProg. However, the V54L mutation directly restricts the steroid binding modes to a unique one, which resembles the orientation of 20α-OHProg within human 20α-HSD. Furthermore, the kinetic study has been carried out. The results show that the V54L mutation significantly decreases the 3α-HSD activity for the reduction of DHT, while this mutation enhances the 20α-HSD activity to convert progesterone.


  • Organizational Affiliation

    Laboratory of Molecular Endocrinology and Oncology, Centre Hospitalier Universitaire (CHU) de Quebec Research Center (CHUL) and Laval University, Québec City, Québec G1V4G2, Canada; Key Laboratory for Space Bioscience & Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, PR China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aldo-keto reductase family 1 member C2
A, B
325Homo sapiensMutation(s): 1 
Gene Names: AKR1C2
EC: 1.3.1.20 (PDB Primary Data), 1.1.1.213 (PDB Primary Data), 1.1.1.53 (UniProt), 1.1.1.209 (UniProt), 1 (UniProt), 1.1.1.62 (UniProt), 1.1.1.357 (UniProt), 1.1.1.112 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P52895 (Homo sapiens)
Explore P52895 
Go to UniProtKB:  P52895
PHAROS:  P52895
GTEx:  ENSG00000151632 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52895
Sequence Annotations
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.142 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.14α = 90
b = 87.1β = 106.31
c = 76.87γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description