3G9V image
Entry Detail
PDB ID:
3G9V
Keywords:
CYTOKINE/CYTOKINE RECEPTOR
Title:
Crystal structure of a soluble decoy receptor IL-22BP bound to interleukin-22
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2009-02-14
Release Date:
2009-04-14
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.76 Å
R-Value Free:
0.28
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 41
3G9V validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Interleukin 22 receptor, alpha 2
Chain IDs:A, C
Chain Length:211
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q969J5 Pfam ID:PF01108, PF09294
Protein Blast
Polymer Type:polypeptide(L)
Description:Interleukin-22
Chain IDs:B, D
Chain Length:151
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q9GZX6 Pfam ID:PF14565
Primary Citation
Crystal structure of a soluble decoy receptor IL-22BP bound to interleukin-22
FEBS Lett. 583 1072 1077 (2009)
PMID: 19285080 DOI: 10.1016/j.febslet.2009.03.006

Abstact

Interleukin-22 (IL-22) plays an important role in the regulation of immune and inflammatory responses in mammals. The IL-22 binding protein (IL-22BP), a soluble receptor that specifically binds IL-22, prevents the IL-22/interleukin-22 receptor 1 (IL-22R1)/interleukin-10 receptor 2 (IL-10R2) complex assembly and blocks IL-22 biological activity. Here we present the crystal structure of the IL-22/IL-22BP complex at 2.75 A resolution. The structure reveals IL-22BP residues critical for IL-22 binding, which were confirmed by site-directed mutagenesis and functional studies. Comparison of IL-22/IL-22BP and IL-22/IL-22R1 crystal structures shows that both receptors display an overlapping IL-22 binding surface, which is consistent with the inhibitory role played by IL-22 binding protein.

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Primary Citation of related structures
3G9V