6HNO

17beta-hydroxysteroid dehydrogenase 14 variant S205 - mutant H93A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

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Ligand Structure Quality Assessment 


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Literature

Mutational and structural studies uncover crucial amino acids determining activity and stability of 17 beta-HSD14.

Badran, M.J.Bertoletti, N.Keils, A.Heine, A.Klebe, G.Marchais-Oberwinkler, S.

(2019) J Steroid Biochem Mol Biol 189: 135-144

  • DOI: 10.1016/j.jsbmb.2019.02.009
  • Primary Citation of Related Structures:  
    6HNO, 6QCK, 6FFB

  • PubMed Abstract: 
  • 17β-Hydroxysteroid dehydrogenase type 14 (17β-HSD14) catalyzes the conversion of highly active estrogens and androgens into their less active oxidized forms in presence of NAD + as cofactor. The crystal structure of 17β-HSD14 has been determined, however, the role of individual amino acids likely involved in the enzymatic function remains poorly understood ...

    17β-Hydroxysteroid dehydrogenase type 14 (17β-HSD14) catalyzes the conversion of highly active estrogens and androgens into their less active oxidized forms in presence of NAD + as cofactor. The crystal structure of 17β-HSD14 has been determined, however, the role of individual amino acids likely involved in the enzymatic function remains poorly understood. Objective of this study was to further characterize the enzyme by site-directed mutagenesis considering five amino acids next to the catalytic center. The tools used for the characterization of the enzyme variants are X-ray crystallography and enzyme kinetics. Lys158 was confirmed to belong to the catalytic triad. Tyr253', located on the C-terminal loop of the adjacent monomer, enters into the active site of the neighboring monomer and interacts with the catalytic Tyr154. Therefore, Tyr253' helps to tie the two monomers together. Cys255, located at the interface between both monomers, can form a disulfide bridge with the Cys255' from the adjacent monomer. In contrast to the contact provided by Tyr253, the latter interaction is not crucial for dimer formation. His93 and Gln148 are located at the rim of the substrate binding pocket. His93 does not interact directly with the ligand in the active site. However, it influences the turnover of the enzyme. The Gln148 restricts in size the access tunnel of the substrate to the binding pocket.


    Organizational Affiliation

    Institute for Pharmaceutical Chemistry, Philipps University Marburg, 35032 Marburg, Germany. Electronic address: marchais@uni-marburg.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
17-beta-hydroxysteroid dehydrogenase 14A274Homo sapiensMutation(s): 2 
Gene Names: HSD17B14DHRS10SDR3SDR47C1UNQ502/PRO474
EC: 1.1.1 (PDB Primary Data), 1.1.1.62 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BPX1 (Homo sapiens)
Explore Q9BPX1 
Go to UniProtKB:  Q9BPX1
PHAROS:  Q9BPX1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD (Subject of Investigation/LOI)
Query on NAD

Download Ideal Coordinates CCD File 
B [auth A]NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.4α = 90
b = 91.4β = 90
c = 132.696γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyMA-5287/1-1
German Research FoundationGermanyKL-1204/15-1

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-31
    Type: Initial release