1XK4 Metal Binding Protein date Sep 26, 2004
title Crystal Structure Of Human Calprotectin(S100a8s100a9)
authors I.P.Korndoerfer, F.Brueckner, A.Skerra
compound source
Molecule: Calgranulin A
Chain: A, B, E, F, I, J
Synonym: S100 Calcium-Binding Protein A8, S100a8, Migration Inhibitory Factor-Related Protein 8, Mrp-8, P8, Cystic Fibr Antigen, Cfag, Leukocyte L1 Complex Light Chain, Calprotect
Engineered: Yes
Mutation: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: S100a8
Expression_system: Escherichia Coli Bl21(De3)
Expression_system_taxid: 469008
Expression_system_strain: Bl21(De3)
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pet-36b(+)-Mrp8c42s

Molecule: Calgranulin B
Chain: C, D, G, H, K, L
Synonym: S100 Calcium-Binding Protein A9, S100a9, Migration Inhibitory Factor-Related Protein 14, Mrp-14, P14, Leucocyt Complex Heavy Chain, Calprotectin L1h Subunit;
Engineered: Yes
Mutation: Yes

Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: S100a9
Expression_system: Escherichia Coli Bl21(De3)
Expression_system_taxid: 469008
Expression_system_strain: Bl21(De3)
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pet-36b(+)-Mrp14c3s
symmetry Space Group: P 1 21 1
R_factor 0.158 R_Free 0.205
crystal
cell
length a length b length c angle alpha angle beta angle gamma
48.509 78.697 177.411 90.00 94.94 90.00
method X-Ray Diffractionresolution 1.80 Å
ligand CA, CL, FLC enzyme
note 1XK4 is a representative structure
Gene
Ontology
ChainFunctionProcessComponent
F, A, J, E, B, I


K, H, C, D, G, L
  • antioxidant activity


  • Primary referenceThe crystal structure of the human (S100A8/S100A9)2 heterotetramer, calprotectin, illustrates how conformational changes of interacting alpha-helices can determine specific association of two EF-hand proteins., Korndorfer IP, Brueckner F, Skerra A, J Mol Biol. 2007 Jul 27;370(5):887-98. Epub 2007 May 3. PMID:17553524
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (220 Kb) [Save to disk]
  • Biological Unit Coordinates (1xk4.pdb1.gz) 71 Kb
  • Biological Unit Coordinates (1xk4.pdb2.gz) 70 Kb
  • Biological Unit Coordinates (1xk4.pdb3.gz) 70 Kb
  • LPC: Ligand-Protein Contacts for 1XK4
  • CSU: Contacts of Structural Units for 1XK4
  • Likely Quarternary Molecular Structure file(s) for 1XK4
  • Structure Factors (973 Kb)
  • Retrieve 1XK4 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1XK4 from S2C, [Save to disk]
  • Re-refined 1xk4 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1XK4 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 1XK4
  • 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 1XK4, from MSDmotif at EBI
  • Fold representative 1xk4 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1xk4_C] [1xk4_B] [1xk4_G] [1xk4_L] [1xk4_F] [1xk4_H] [1xk4_A] [1xk4_K] [1xk4_E] [1xk4_J] [1xk4_I] [1xk4] [1xk4_D]
  • SWISS-PROT database: [P05109] [P06702]
  • Domain organization of [S10A8_HUMAN] [S10A9_HUMAN] by SWISSPFAM
  • Domain found in 1XK4: [S_100 ] by SMART
  • Other resources with information on 1XK4
  • Community annotation for 1XK4 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

  • You may enter another PDB ID code
    Go [Back], to the [PDB Lite page], to the [OCA Search page] or to the [PDB Home page]
    OCA© by Jaime Prilusky, 1996-2014
    Bioinformatics Unit
    Weizmann Institute of Science