ISDA

Deposition Date 1994-03-09

Release Date 1995-04-01

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1ILT

Keywords:

CYTOKINE

Title:

X-RAY STRUCTURE OF INTERLEUKIN-1 RECEPTOR ANTAGONIST AT 2.0 ANGSTROMS RESOLUTION

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:INTERLEUKIN-1 RECEPTOR ANTAGONIST
Gene (Uniprot):IL1RN
Chain IDs:A, B
Chain Length:152
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P18510 Pfam ID:PF00340

Ligand Molecules

Primary Citation

X-ray structure of interleukin-1 receptor antagonist at 2.0-A resolution.

Vigers, G.P, Caffes, P, Evans, R.J, Thompson, R.C, Eisenberg, S.P, Brandhuber, B.J.Show

J.Biol.Chem. 269 12874 12879 (1994)

PMID: 8175703

Abstact

Interleukin-1 receptor antagonist (IL-1ra) is a natural competitive antagonist of IL-1. In order to further elucidate the mechanism by which IL-1ra binds without activating the IL-1 receptor, we have solved the crystal structure of IL-1ra at 2.0-A resolution. IL-1ra has the same overall beta-trefoil fold as IL-1 alpha and IL-1 beta and has a very similar hydrophobic core. However, there are a number of structural differences between the molecules, including significant differences at the open end of the beta-barrel, which has been identified in IL-1 beta as a receptor binding site.

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Primary Citation of related structures