1U7F

Crystal Structure of the phosphorylated Smad3/Smad4 heterotrimeric complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.232 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of heteromeric smad protein assembly in tgf-Beta signaling

Chacko, B.M.Qin, B.Y.Tiwari, A.Shi, G.Lam, S.Hayward, L.J.De Caestecker, M.Lin, K.

(2004) Mol Cell 15: 813-823

  • DOI: 10.1016/j.molcel.2004.07.016
  • Primary Citation of Related Structures:  
    1U7F, 1U7V

  • PubMed Abstract: 
  • The formation of protein complexes between phosphorylated R-Smads and Smad4 is a central event in the TGF-beta signaling pathway. We have determined the crystal structure of two R-Smad/Smad4 complexes, Smad3/Smad4 to 2.5 angstroms, and Smad2/Smad4 to ...

    The formation of protein complexes between phosphorylated R-Smads and Smad4 is a central event in the TGF-beta signaling pathway. We have determined the crystal structure of two R-Smad/Smad4 complexes, Smad3/Smad4 to 2.5 angstroms, and Smad2/Smad4 to 2.7 angstroms. Both complexes are heterotrimers, comprising two phosphorylated R-Smad subunits and one Smad4 subunit, a finding that was corroborated by isothermal titration calorimetry and mutational studies. Preferential formation of the R-Smad/Smad4 heterotrimer over the R-Smad homotrimer is largely enthalpy driven, contributed by the unique presence of strong electrostatic interactions within the heterotrimeric interfaces. The study supports a common mechanism of Smad protein assembly in TGF-beta superfamily signaling.


    Organizational Affiliation

    Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01655, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mothers against decapentaplegic homolog 3AC198Homo sapiensMutation(s): 2 
Gene Names: SMAD3MADH3
Find proteins for P84022 (Homo sapiens)
Explore P84022 
Go to UniProtKB:  P84022
NIH Common Fund Data Resources
PHAROS  P84022
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mothers against decapentaplegic homolog 4B239Homo sapiensMutation(s): 0 
Gene Names: SMAD4MADH4DPC4
Find proteins for Q13485 (Homo sapiens)
Explore Q13485 
Go to UniProtKB:  Q13485
NIH Common Fund Data Resources
PHAROS  Q13485
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A,CL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.471α = 90
b = 60.545β = 90
c = 205.779γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance