2Q1M

Crystal Structure of human GITRL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

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 U S A 104: 19452-19457

  • DOI: 10.1073/pnas.0709264104
  • Structures With Same Primary Citation

  • 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
Tumor necrosis factor ligand superfamily member 18A130Homo sapiensMutation(s): 0 
Gene Names: TNFSF18AITRLGITRLTL6UNQ149/PRO175
Find proteins for Q9UNG2 (Homo sapiens)
Explore Q9UNG2 
Go to UniProtKB:  Q9UNG2
NIH Common Fund Data Resources
PHAROS  Q9UNG2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.691α = 90
b = 72.691β = 90
c = 53.101γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
SHELXDphasing
SHELXEmodel building

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description