2R32

Crystal Structure of human GITRL variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Assembly and structural properties of glucocorticoid-induced TNF receptor ligand: Implications for function.

Chattopadhyay, K.Ramagopal, U.A.Mukhopadhaya, A.Malashkevich, V.N.Dilorenzo, T.P.Brenowitz, M.Nathenson, S.G.Almo, S.C.

(2007) Proc.Natl.Acad.Sci.USA 104: 19452-19457

  • DOI: 10.1073/pnas.0709264104
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Glucocorticoid-induced TNF receptor ligand (GITRL), a recently identified member of the TNF family, binds to its receptor GITR on both effector and regulatory T cells and generates positive costimulatory signals implicated in a wide range of T cell f ...

    Glucocorticoid-induced TNF receptor ligand (GITRL), a recently identified member of the TNF family, binds to its receptor GITR on both effector and regulatory T cells and generates positive costimulatory signals implicated in a wide range of T cell functions. Structural analysis reveals that the human GITRL (hGITRL) ectodomain self-assembles into an atypical expanded homotrimer with sparse monomer-monomer interfaces. Consistent with the small intersubunit interfaces, hGITRL exhibits a relatively weak tendency to trimerize in solution and displays a monomer-trimer equilibrium not reported for other TNF family members. This unique assembly behavior has direct implications for hGITRL-GITR signaling, because enforced trimerization of soluble hGITRL ectodomain results in an approximately 100-fold increase in its receptor binding affinity and also in enhanced costimulatory activity. The apparent reduction in affinity that is the consequence of this dynamic equilibrium may represent a mechanism to realize the biologically optimal level of signaling through the hGITRL-GITR pathway, as opposed to the maximal achievable level.


    Organizational Affiliation

    Departments of Microbiology and Immunology, Cell Biology, Biochemistry, Physiology and Biophysics, Medicine (Division of Endocrinology), Albert Einstein College of Medicine, Bronx, NY 10461, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GCN4-pII/Tumor necrosis factor ligand superfamily member 18 fusion protein
A
166Homo sapiensMutation(s): 0 
Gene Names: TNFSF18 (AITRL, GITRL, TL6)
Find proteins for Q9UNG2 (Homo sapiens)
Go to Gene View: TNFSF18
Go to UniProtKB:  Q9UNG2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.199 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 61.219α = 90.00
b = 61.219β = 90.00
c = 113.948γ = 120.00
Software Package:
Software NamePurpose
CBASSdata collection
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data reduction
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description