1ILT | pdb_00001ilt

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

PDB DOI: https://doi.org/10.2210/pdb1ILT/pdb

Classification: CYTOKINE
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 1994-03-09 Released: 1995-04-01
Deposition Author(s): Brandhuber, B.J., Vigers, G.P.A.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Work:
0.236 (Depositor)
R-Value Observed:
0.236 (Depositor)

wwPDB Validation 3D Report Full Report

Validation slider image for 1ILT

This is version 1.4 of the entry. See complete history.

Literature

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.

(1994) J Biological Chem 269: 12874-12879

PubMed: 8175703 Search on PubMed
Primary Citation Related Structures:
1ILT

PubMed Abstract:
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.

Organizational Affiliation

Synergen, Inc., Boulder, Colorado 80301.

Macromolecule Content

Total Structure Weight: 34.29 kDa
Atom Count: 286
Modeled Residue Count: 286
Deposited Residue Count: 304
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-1 RECEPTOR ANTAGONIST	A, B	152	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P18510 (Homo sapiens) Explore P18510 Go to UniProtKB: P18510
PHAROS: P18510 GTEx: ENSG00000136689
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P18510
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Work: 0.236 (Depositor)
R-Value Observed: 0.236 (Depositor)

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.11	α = 90
b = 71.11	β = 90
c = 112.61	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

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Entry History

Deposition Data

Released Date: 1995-04-01

Deposition Author(s):

Brandhuber, B.J.

Revision History (Full details and data files)

Version 1.0: 1995-04-01
Type: Initial release
Version 1.1: 2008-03-24
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Version format compliance
Version 1.3: 2017-11-29
Changes: Derived calculations, Other
Version 1.4: 2024-02-07
Changes: Data collection, Database references

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.