3ZWH

Ca2+-bound S100A4 C3S, C81S, C86S and F45W mutant complexed with myosin IIA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of the S100A4-Nonmuscle Myosin Iia Tail Fragment Complex Reveals an Asymmetric Target Binding Mechanism.

Kiss, B.Duelli, A.Radnai, L.Kekesi, K.A.Katona, G.Nyitray, L.

(2012) Proc Natl Acad Sci U S A 109: 6048

  • DOI: 10.1073/pnas.1114732109
  • Primary Citation of Related Structures:  
    3ZWH

  • PubMed Abstract: 
  • S100A4 is a member of the S100 family of calcium-binding proteins that is directly involved in tumor metastasis. It binds to the nonmuscle myosin IIA (NMIIA) tail near the assembly competence domain (ACD) promoting filament disassembly, which could b ...

    S100A4 is a member of the S100 family of calcium-binding proteins that is directly involved in tumor metastasis. It binds to the nonmuscle myosin IIA (NMIIA) tail near the assembly competence domain (ACD) promoting filament disassembly, which could be associated with increasing metastatic potential of tumor cells. Here, we investigate the mechanism of S100A4-NMIIA interaction based on binding studies and the crystal structure of S100A4 in complex with a 45-residue-long myosin heavy chain fragment. Interestingly, we also find that S100A4 binds as strongly to a homologous heavy chain fragment of nonmuscle myosin IIC as to NMIIA. The structure of the S100A4-NMIIA complex reveals a unique mode of interaction in the S100 family: A single, predominantly α-helical myosin chain is wrapped around the Ca(2+)-bound S100A4 dimer occupying both hydrophobic binding pockets. Thermal denaturation experiments of coiled-coil forming NMIIA fragments indicate that the coiled-coil partially unwinds upon S100A4 binding. Based on these results, we propose a model for NMIIA filament disassembly: Part of the random coil tailpiece and the C-terminal residues of the coiled-coil are wrapped around an S100A4 dimer disrupting the ACD and resulting in filament dissociation. The description of the complex will facilitate the design of specific drugs that interfere with the S100A4-NMIIA interaction.


    Organizational Affiliation

    Department of Biochemistry, Eötvös Loránd University, H-1117 Budapest, Hungary.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN S100-A4AB104Homo sapiensMutation(s): 4 
Gene Names: S100A4CAPLMTS1
Find proteins for P26447 (Homo sapiens)
Explore P26447 
Go to UniProtKB:  P26447
NIH Common Fund Data Resources
PHAROS  P26447
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MYOSIN-9Q45Homo sapiensMutation(s): 1 
Gene Names: MYH9
Find proteins for P35579 (Homo sapiens)
Explore P35579 
Go to UniProtKB:  P35579
NIH Common Fund Data Resources
PHAROS  P35579
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
AZI
Query on AZI

Download CCD File 
B, Q
AZIDE ION
N3
IVRMZWNICZWHMI-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.972α = 90
b = 63.972β = 90
c = 138.984γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-05-23
    Changes: Other
  • Version 1.2: 2013-11-27
    Changes: Database references, Structure summary