1YKB image
Deposition Date 2005-01-17
Release Date 2005-07-12
Last Version Date 2024-10-30
Entry Detail
PDB ID:
1YKB
Keywords:
CYTOKINE
Title:
Crystal Structure of Insect Cell Expressed IL-22
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.60 Å
R-Value Free:
0.26
R-Value Work:
0.23
Space Group:
P 1 21 1
1YKB validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:PROTEIN (Interleukin-22)
Gene (Uniprot):IL22
Chain IDs:A, B, C, D, E, F
Chain Length:142
Number of Molecules:6
Biological Source:Homo sapiens
UniProt ID:Q9GZX6 Pfam ID:PF14565
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Ligand Molecules
NAG
Primary Citation
Structure of insect-cell-derived IL-22.
Acta Crystallogr.,Sect.D 61 942 950 (2005)
PMID: 15983417 DOI: 10.1107/S0907444905009601

Abstact

The crystal structure of interleukin-22 expressed in Drosophila melanogaster S2 cells (IL-22(Dm)) has been determined at 2.6 A resolution. IL-22(Dm) crystals contain six molecules in the asymmetric unit. Comparison of IL-22(Dm) and IL-22(Ec) (interleukin-22 produced in Escherichia coli) structures reveals that N-linked glycosylation causes only minor structural changes to the cytokine. However, 1-4 A main-chain differences are observed between the six IL-22(Dm) monomers at regions corresponding to the IL-22R1 and IL-10R2 binding sites. The structure of the carbohydrate and the conformational variation of IL22(Dm) provide new insights into IL-22 receptor recognition.

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Primary Citation of related structures
1YKB