1HBX

Ternary Complex of SAP-1 and SRF with specific SRE DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The B-Box Dominates Sap-1/Srf Interactions in the Structure of the Ternary Complex

Hassler, M.Richmond, T.J.

(2001) Embo J. 20: 3018

  • DOI: 10.1093/emboj/20.12.3018

  • PubMed Abstract: 
  • The serum response element (SRE) is found in several immediate-early gene promoters. This DNA sequence is necessary and sufficient for rapid transcriptional induction of the human c-fos proto-oncogene in response to stimuli external to the cell. Full ...

    The serum response element (SRE) is found in several immediate-early gene promoters. This DNA sequence is necessary and sufficient for rapid transcriptional induction of the human c-fos proto-oncogene in response to stimuli external to the cell. Full activation of the SRE requires the cooperative binding of a ternary complex factor (TCF) and serum response factor (SRF) to their specific DNA sites. The X-ray structure of the human SAP-1-SRF-SRE DNA ternary complex was determined (Protein Data Bank code 1hbx). It shows SAP-1 TCF bound to SRF through interactions between the SAP-1 B-box and SRF MADS domain in addition to contacts between their respective DNA-binding motifs. The SAP-1 B-box is part of a flexible linker of which 21 amino acids become ordered upon ternary complex formation. Comparison with a similar region from the yeast MATalpha2-MCM1-DNA complex suggests a common binding motif through which MADS-box proteins may interact with additional factors such as Fli-1.


    Organizational Affiliation

    ETH Zürich, Institut für Molekularbiologie und Biophysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERUM RESPONSE FACTOR
A, B, D, E
92Homo sapiensGene Names: SRF
Find proteins for P11831 (Homo sapiens)
Go to Gene View: SRF
Go to UniProtKB:  P11831
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ETS-DOMAIN PROTEIN ELK-4
G, H
157Homo sapiensGene Names: ELK4 (SAP1)
Find proteins for P28324 (Homo sapiens)
Go to Gene View: ELK4
Go to UniProtKB:  P28324
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*GP*AP*TP*GP*GP*CP*CP*TP*AP*AP*TP*TP*AP* GP*GP*AP*CP*TP*TP*CP*CP*GP*GP*TP*G)-3'C,F26Homo sapiens
Entity ID: 4
MoleculeChainsLengthOrganism
5'-D(*CP*AP*CP*AP*CP*CP*GP*GP*AP*AP*GP*TP*CP* CP*TP*AP*AP*TP*TP*AP*GP*GP*CP*CP*AP*T)-3'W,X26Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.252 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 142.680α = 90.00
b = 144.390β = 90.00
c = 75.930γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNSphasing
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-06-27
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance