1IRA Complex (Cytokine Receptor Antagonist) date Apr 09, 1998
title Complex Of The Interleukin-1 Receptor With The Interleukin-1 Antagonist (Il1ra)
authors H.A.Schreuder, C.Tardif, S.Tramp-Kalmeyer, A.Soffientini, E.Saru A.Akeson, T.Bowlin, S.Yanofsky, R.W.Barrett
compound source
Molecule: Interleukin-1 Receptor Antagonist
Chain: X
Synonym: Il1ra
Engineered: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Cell_line: Sf9
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_plasmid: Tac-Bsp

Molecule: Interleukin-1 Receptor
Chain: Y
Fragment: Type I Receptor, Extracellular Domains
Engineered: Yes

Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Cell_line: Sf9
Expression_system: Spodoptera Frugiperda
Expression_system_common: Fall Armyworm
Expression_system_taxid: 7108
Expression_system_cell_line: Sf9
Expression_system_vector: Baculovirus
Expression_system_plasmid: Pvl1392
symmetry Space Group: P 21 21 21
R_factor 0.213 R_Free 0.314
length a length b length c angle alpha angle beta angle gamma
47.200 84.600 140.200 90.00 90.00 90.00
method X-Ray Diffractionresolution 2.70 Å
ligand NAG enzyme
related structures by homologous chain: 1G0Y, 1ILR, 1ILT, 1ITB


Primary referenceA new cytokine-receptor binding mode revealed by the crystal structure of the IL-1 receptor with an antagonist., Schreuder H, Tardif C, Trump-Kallmeyer S, Soffientini A, Sarubbi E, Akeson A, Bowlin T, Yanofsky S, Barrett RW, Nature 1997 Mar 13;386(6621):194-200. PMID:9062194
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (82 Kb) [Save to disk]
  • Biological Unit Coordinates (1ira.pdb1.gz) 77 Kb
  • LPC: Ligand-Protein Contacts for 1IRA
  • CSU: Contacts of Structural Units for 1IRA
  • Likely Quarternary Molecular Structure file(s) for 1IRA
  • Structure Factors (186 Kb)
  • Retrieve 1IRA in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1IRA from S2C, [Save to disk]
  • Re-refined 1ira structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1IRA in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1IRA
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1IRA, from MSDmotif at EBI
  • Genome occurence of 1IRA's fold from GeneCensus
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1irax_, region X [Jmol] [rasmolscript] [script source]
        - Domain d1iray1, region Y:1-101 [Jmol] [rasmolscript] [script source]
        - Domain d1iray2, region Y:102-204 [Jmol] [rasmolscript] [script source]
        - Domain d1iray3, region Y:205-311 [Jmol] [rasmolscript] [script source]
  • Fold representative 1ira from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1ira_X] [1ira_Y] [1ira]
  • SWISS-PROT database: [P14778] [P18510]
  • Domain organization of [IL1R1_HUMAN] [IL1RA_HUMAN] by SWISSPFAM
  • Domains found in 1IRA: [IG] [IG_like] [IL1 ] by SMART
  • Other resources with information on 1IRA
  • Community annotation for 1IRA at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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