1OJ5

Crystal structure of the Nco-A1 PAS-B domain bound to the STAT6 transactivation domain LXXLL motif


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Ncoa-1/Src-1 Pas-B Domain Bound to the Lxxll Motif of the Stat6 Transactivation Domain

Razeto, A.Ramakrishnan, V.Litterst, C.M.Giller, K.Griesinger, C.Carlomagno, T.Lakomek, N.Heimburg, T.Lodrini, M.Pfitzner, E.Becker, S.

(2004) J.Mol.Biol. 336: 319

  • Also Cited By: 5NWX

  • PubMed Abstract: 
  • Signal transducer and activator of transcription 6 (STAT6) regulates transcriptional activation in response to interleukin-4 (IL-4) by direct interaction with coactivators. The CREB-binding protein (p300/CBP) and the nuclear coactivator 1 (NCoA-1), a ...

    Signal transducer and activator of transcription 6 (STAT6) regulates transcriptional activation in response to interleukin-4 (IL-4) by direct interaction with coactivators. The CREB-binding protein (p300/CBP) and the nuclear coactivator 1 (NCoA-1), a member of the p160/steroid receptor coactivator family, bind independently to specific regions of the STAT6 transactivation domain and act as coactivators. The interaction between STAT6 and NCoA-1 is mediated by an LXXLL motif in the transactivation domain of STAT6. To define the mechanism of coactivator recognition, we determined the crystal structure of the NCoA-1 PAS-B domain in complex with the STAT6 LXXLL motif. The amphipathic, alpha-helical STAT6 LXXLL motif binds mostly through specific hydrophobic interactions to NCoA-1. A single amino acid of the NCoA-1 PAS-B domain establishes hydrophilic interactions with the STAT6 peptide. STAT6 interacts only with the PAS-B domain of NCoA-1 but not with the homologous regions of NCoA-2 and NCoA-3. The residues involved in binding the STAT6 peptide are strongly conserved between the different NCoA family members. Therefore surface complementarity between the hydrophobic faces of the STAT6 fragment and of the NCoA-1 PAS-B domain almost exclusively defines the binding specificity between the two proteins.


    Related Citations: 
    • Transcriptional Activation by Stat6 Requires the Direct Interaction with Ncoa-1
      Litterst, C.M.,Pfitzner, E.
      (2001) J.Biol.Chem. 276: 45713
    • An Lxxll Motif in the Transactivation Domain of Stat6 Mediates Recruitment of Ncoa-1/Src-1
      Litterst, C.M.,Pfitzner, E.
      (2002) J.Biol.Chem. 277: 36052


    Organizational Affiliation

    Department for NMR-based Structural Biology, Max-Planck-Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
STEROID RECEPTOR COACTIVATOR 1A
A
132Mus musculusGene Names: Ncoa1 (Src1)
EC: 2.3.1.48
Find proteins for P70365 (Mus musculus)
Go to UniProtKB:  P70365
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 6
B
14Homo sapiensGene Names: STAT6
Find proteins for P42226 (Homo sapiens)
Go to Gene View: STAT6
Go to UniProtKB:  P42226
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.166 
  • Space Group: P 62
Unit Cell:
Length (Å)Angle (°)
a = 62.100α = 90.00
b = 62.100β = 90.00
c = 73.400γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction
SHELXEphasing
SHELXDphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance