4FTG Calcium-Binding Protein Protein Binding date Jun 27, 2012
title The Crystal Structure Of An Ahnak Peptide In Complex With Th S100a10anxa2 Heterotetramer
authors G.Ozorowski, H.Luecke
compound source
Molecule: Protein S100-A10
Chain: A, B
Synonym: Calpactin I Light Chain, Calpactin-1 Light Chain, Ligand Of Annexin II, S100 Calcium-Binding Protein A10, P10 P11;
Engineered: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: Anx2lg, Cal1l, Clp11, S100a10
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_strain: Bl21(De3)
Expression_system_vector_type: Plasmid

Molecule: Annexin A2
Chain: C, D
Fragment: Annexin A2 N-Terminal Peptide (Unp Residues 2-16)
Synonym: Annexin II, Annexin-2, Calpactin I Heavy Chain, Ca Heavy Chain, Chromobindin-8, Lipocortin II, Placental Antic Protein Iv, Pap-Iv, Protein I, P36;
Engineered: Yes
Mutation: Yes

Synthetic: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606

Molecule: Neuroblast Differentiation-Associated Protein Ahn
Chain: E
Fragment: Ahnak Peptide (Unp Residues 5654-5673)
Synonym: Desmoyokin
Engineered: Yes

Synthetic: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
symmetry Space Group: C 1 2 1
R_factor 0.181 R_Free 0.251
length a length b length c angle alpha angle beta angle gamma
79.072 55.216 63.140 90.00 111.73 90.00
method X-Ray Diffractionresolution 2.51 Å
ligand ACE, IPA enzyme
A, B

Primary referenceStructure of a C-terminal AHNAK peptide in a 1:2:2 complex with S100A10 and an acetylated N-terminal peptide of annexin A2., Ozorowski G, Milton S, Luecke H, Acta Crystallogr D Biol Crystallogr. 2013 Jan;69(Pt 1):92-104. doi:, 10.1107/S0907444912043429. Epub 2012 Dec 20. PMID:23275167
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (82 Kb) [Save to disk]
  • Biological Unit Coordinates (4ftg.pdb1.gz) 77 Kb
  • LPC: Ligand-Protein Contacts for 4FTG
  • CSU: Contacts of Structural Units for 4FTG
  • Structure Factors (131 Kb)
  • Retrieve 4FTG in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 4FTG from S2C, [Save to disk]
  • Re-refined 4ftg structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 4FTG 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 4FTG
  • 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 4FTG, from MSDmotif at EBI
  • Fold representative 4ftg from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [4ftg_E] [4ftg_B] [4ftg_D] [4ftg_C] [4ftg_A] [4ftg]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Domain found in 4FTG: [S_100 ] by SMART
  • Other resources with information on 4FTG
  • Community annotation for 4FTG at PDBWiki (http://pdbwiki.org)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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