1D2S

CRYSTAL STRUCTURE OF THE N-TERMINAL LAMININ G-LIKE DOMAIN OF SHBG IN COMPLEX WITH DIHYDROTESTOSTERONE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal structure of human sex hormone-binding globulin: steroid transport by a laminin G-like domain.

Grishkovskaya, I.Avvakumov, G.V.Sklenar, G.Dales, D.Hammond, G.L.Muller, Y.A.

(2000) EMBO J 19: 504-512

  • DOI: 10.1093/emboj/19.4.504
  • Primary Citation of Related Structures:  
    1D2S

  • PubMed Abstract: 
  • Human sex hormone-binding globulin (SHBG) transports sex steroids in blood and regulates their access to target tissues. In biological fluids, SHBG exists as a homodimer and each monomer comprises two laminin G-like domains (G domains). The crystal s ...

    Human sex hormone-binding globulin (SHBG) transports sex steroids in blood and regulates their access to target tissues. In biological fluids, SHBG exists as a homodimer and each monomer comprises two laminin G-like domains (G domains). The crystal structure of the N-terminal G domain of SHBG in complex with 5alpha-dihydrotestosterone at 1.55 A resolution reveals both the architecture of the steroid-binding site and the quaternary structure of the dimer. We also show that G domains have jellyroll topology and are structurally related to pentraxin. In each SHBG monomer, the steroid intercalates into a hydrophobic pocket within the beta-sheet sandwich. The steroid and a 20 A distant calcium ion are not located at the dimer interface. Instead, two separate steroid-binding pockets and calcium-binding sites exist per dimer. The structure displays intriguing disorder for loop segment Pro130-Arg135. In all other jellyroll proteins, this loop is well ordered. If modelled accordingly, it covers the steroid-binding site and could thereby regulate access of ligands to the binding pocket.


    Organizational Affiliation

    Forschungsgruppe Kristallographie, Max-Delbrück-Center for Molecular Medicine, Robert-Roessle-Strasse 10, D-13092 Berlin, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SEX HORMONE-BINDING GLOBULINA170Homo sapiensMutation(s): 0 
Gene Names: SHBG
Find proteins for P04278 (Homo sapiens)
Explore P04278 
Go to UniProtKB:  P04278
NIH Common Fund Data Resources
PHAROS  P04278
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DHT
Query on DHT

Download CCD File 
A
5-ALPHA-DIHYDROTESTOSTERONE
C19 H30 O2
NVKAWKQGWWIWPM-ABEVXSGRSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DHTKd:  0.18000000715255737   nM  BindingDB
DHTIC50:  3.799999952316284   nM  BindingDB
DHTKd :  0.18199999630451202   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.210 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.04α = 90
b = 104.04β = 90
c = 84.43γ = 120
Software Package:
Software NamePurpose
MAR345data collection
XDSdata reduction
MLPHAREphasing
REFMACrefinement
XDSdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-06-28
    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: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2018-01-31
    Changes: Experimental preparation