5XOD

Crystal structure of human Smad2-Ski complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Hydrophobic patches on SMAD2 and SMAD3 determine selective binding to cofactors

Miyazono, K.I.Moriwaki, S.Ito, T.Kurisaki, A.Asashima, M.Tanokura, M.

(2018) Sci Signal 11

  • DOI: 10.1126/scisignal.aao7227
  • Primary Citation of Related Structures:  
    5XOD, 5XOC

  • PubMed Abstract: 
  • The transforming growth factor-β (TGF-β) superfamily of cytokines regulates various biological processes, including cell proliferation, immune responses, autophagy, and senescence. Dysregulation of TGF-β signaling causes various diseases, such as cancer and fibrosis ...

    The transforming growth factor-β (TGF-β) superfamily of cytokines regulates various biological processes, including cell proliferation, immune responses, autophagy, and senescence. Dysregulation of TGF-β signaling causes various diseases, such as cancer and fibrosis. SMAD2 and SMAD3 are core transcription factors involved in TGF-β signaling, and they form heterotrimeric complexes with SMAD4 (SMAD2-SMAD2-SMAD4, SMAD3-SMAD3-SMAD4, and SMAD2-SMAD3-SMAD4) in response to TGF-β signaling. These heterotrimeric complexes interact with cofactors to control the expression of TGF-β-dependent genes. SMAD2 and SMAD3 may promote or repress target genes depending on whether they form complexes with other transcription factors, coactivators, or corepressors; therefore, the selection of specific cofactors is critical for the appropriate activity of these transcription factors. To reveal the structural basis by which SMAD2 and SMAD3 select cofactors, we determined the crystal structures of SMAD3 in complex with the transcription factor FOXH1 and SMAD2 in complex with the transcriptional corepressor SKI. The structures of the complexes show that the MAD homology 2 (MH2) domains of SMAD2 and SMAD3 have multiple hydrophobic patches on their surfaces. The cofactors tether to various subsets of these patches to interact with SMAD2 and SMAD3 in a cooperative or competitive manner to control the output of TGF-β signaling.


    Organizational Affiliation

    Laboratory of Basic Science on Healthy Longevity, Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan. amtanok@mail.ecc.u-tokyo.ac.jp.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mothers against decapentaplegic homolog 2A199Homo sapiensMutation(s): 0 
Gene Names: SMAD2MADH2MADR2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15796 (Homo sapiens)
Explore Q15796 
Go to UniProtKB:  Q15796
PHAROS:  Q15796
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ski oncogeneB31Homo sapiensMutation(s): 0 
Gene Names: SKI
UniProt & NIH Common Fund Data Resources
Find proteins for P12755 (Homo sapiens)
Explore P12755 
Go to UniProtKB:  P12755
PHAROS:  P12755
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.84α = 90
b = 110.84β = 90
c = 110.84γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPS KAKENHIJapan15K14708
JSPS KAKENHIJapan23228003

Revision History  (Full details and data files)

  • Version 1.0: 2018-03-28
    Type: Initial release
  • Version 1.1: 2018-04-11
    Changes: Data collection, Database references