1MJS

MH2 domain of transcriptional factor SMAD3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Smad3 allostery links TGF-beta receptor kinase activation to transcriptional control

Qin, B.Y.Lam, S.S.Correia, J.J.Lin, K.

(2002) Genes Dev. 16: 1950-1963

  • DOI: 10.1101/gad.1002002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Smad3 transduces the signals of TGF-betas, coupling transmembrane receptor kinase activation to transcriptional control. The membrane-associated molecule SARA (Smad Anchor for Receptor Activation) recruits Smad3 for phosphorylation by the receptor ki ...

    Smad3 transduces the signals of TGF-betas, coupling transmembrane receptor kinase activation to transcriptional control. The membrane-associated molecule SARA (Smad Anchor for Receptor Activation) recruits Smad3 for phosphorylation by the receptor kinase. Upon phosphorylation, Smad3 dissociates from SARA and enters the nucleus, in which its transcriptional activity can be repressed by Ski. Here, we show that SARA and Ski recognize specifically the monomeric and trimeric forms of Smad3, respectively. Thus, trimerization of Smad3, induced by phosphorylation, simultaneously activates the TGF-beta signal by driving Smad3 dissociation from SARA and sets up the negative feedback mechanism by Ski. Structural models of the Smad3/SARA/receptor kinase complex and Smad3/Ski complex provide insights into the molecular basis of regulation.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SMAD 3
A
197Homo sapiensMutation(s): 0 
Gene Names: SMAD3 (MADH3)
Find proteins for P84022 (Homo sapiens)
Go to Gene View: SMAD3
Go to UniProtKB:  P84022
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.196 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 54.325α = 90.00
b = 54.325β = 90.00
c = 59.428γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance