1J99

CRYSTAL STRUCTURE OF HUMAN DEHYDROEPIANDROSTERONE SULFOTRANSFERASE IN COMPLEX WITH SUBSTRATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of human dehydroepiandrosterone sulphotransferase in complex with substrate.

Rehse, P.H.Zhou, M.Lin, S.X.

(2002) Biochem.J. 364: 165-171


  • PubMed Abstract: 
  • Dehydroepiandrosterone sulphotransferase (DHEA-ST) is an enzyme that converts dehydroepiandrosterone (DHEA), and some other steroids, into their sulphonated forms. The enzyme catalyses the sulphonation of DHEA on the 3alpha-oxygen, with 3'-phosphoade ...

    Dehydroepiandrosterone sulphotransferase (DHEA-ST) is an enzyme that converts dehydroepiandrosterone (DHEA), and some other steroids, into their sulphonated forms. The enzyme catalyses the sulphonation of DHEA on the 3alpha-oxygen, with 3'-phosphoadenosine-5'-phosphosulphate contributing the sulphate. The structure of human DHEA-ST in complex with its preferred substrate DHEA has been solved here to 1.99 A using molecular replacement with oestradiol sulphotransferase (37% sequence identity) as a model. Two alternative substrate-binding orientations have been identified. The primary, catalytic, orientation has the DHEA 3alpha-oxygen and the highly conserved catalytic histidine in nearly identical positions as are seen for the related oestradiol sulphotransferase. The substrate, however, shows rotations of up to 30 degrees, and there is a corresponding rearrangement of the protein loops contributing to the active site. This may also reflect the low identity between the two enzymes. The second orientation penetrates further into the active site and can form a potential hydrogen bond with the desulphonated cofactor 3',5'-phosphoadenosine (PAP). This second site contains more van der Waal interactions with hydrophobic residues than the catalytic site and may also reflect the substrate-inhibition site. The PAP position was obtained from the previously solved structure of DHEA-ST co-crystallized with PAP. This latter structure, due to the arrangement of loops within the active site and monomer interactions, cannot bind substrate. The results presented here describe details of substrate binding to DHEA-ST and the potential relationship to substrate inhibition.


    Organizational Affiliation

    Oncology and Molecular Endocrinology Research Center, Laval University Medical Center CHUL (CHUQ), 2705 Boul. Laurier, Quebec City, Quebec, G1V 4G2, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALCOHOL SULFOTRANSFERASE
A
293Homo sapiensGene Names: SULT2A1 (HST, STD)
EC: 2.8.2.14
Find proteins for Q06520 (Homo sapiens)
Go to Gene View: SULT2A1
Go to UniProtKB:  Q06520
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
HGI
Query on HGI

Download SDF File 
Download CCD File 
A
MERCURY (II) IODIDE
MERCURY DIIODIDE
Hg I2
YFDLHELOZYVNJE-UHFFFAOYSA-L
 Ligand Interaction
AND
Query on AND

Download SDF File 
Download CCD File 
A
3-BETA-HYDROXY-5-ANDROSTEN-17-ONE
C19 H28 O2
FMGSKLZLMKYGDP-USOAJAOKSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.231 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 77.931α = 90.00
b = 137.976β = 90.00
c = 45.864γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
CNSphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance