Experimental Data Snapshot

  • Resolution: 1.99 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.231 

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Crystal structure of human dehydroepiandrosterone sulphotransferase in complex with substrate.

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

(2002) Biochem J 364: 165-171

  • DOI: https://doi.org/10.1042/bj3640165
  • Primary Citation of Related Structures:  

  • 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'-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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ALCOHOL SULFOTRANSFERASE293Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q06520 (Homo sapiens)
Explore Q06520 
Go to UniProtKB:  Q06520
PHAROS:  Q06520
GTEx:  ENSG00000105398 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06520
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • 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
b = 137.976β = 90
c = 45.864γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-05-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description