5E24

Structure of the Su(H)-Hairless-DNA Repressor Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.14 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Function of the Su(H)-Hairless Repressor Complex, the Major Antagonist of Notch Signaling in Drosophila melanogaster.

Yuan, Z.Praxenthaler, H.Tabaja, N.Torella, R.Preiss, A.Maier, D.Kovall, R.A.

(2016) Plos Biol. 14: e1002509-e1002509

  • DOI: 10.1371/journal.pbio.1002509

  • PubMed Abstract: 
  • Notch is a conserved signaling pathway that specifies cell fates in metazoans. Receptor-ligand interactions induce changes in gene expression, which is regulated by the transcription factor CBF1/Su(H)/Lag-1 (CSL). CSL interacts with coregulators to r ...

    Notch is a conserved signaling pathway that specifies cell fates in metazoans. Receptor-ligand interactions induce changes in gene expression, which is regulated by the transcription factor CBF1/Su(H)/Lag-1 (CSL). CSL interacts with coregulators to repress and activate transcription from Notch target genes. While the molecular details of the activator complex are relatively well understood, the structure-function of CSL-mediated repressor complexes is poorly defined. In Drosophila, the antagonist Hairless directly binds Su(H) (the fly CSL ortholog) to repress transcription from Notch targets. Here, we determine the X-ray structure of the Su(H)-Hairless complex bound to DNA. Hairless binding produces a large conformational change in Su(H) by interacting with residues in the hydrophobic core of Su(H), illustrating the structural plasticity of CSL molecules to interact with different binding partners. Based on the structure, we designed mutants in Hairless and Su(H) that affect binding, but do not affect formation of the activator complex. These mutants were validated in vitro by isothermal titration calorimetry and yeast two- and three-hybrid assays. Moreover, these mutants allowed us to solely characterize the repressor function of Su(H) in vivo.


    Organizational Affiliation

    Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose-binding periplasmic protein
A, C
370Escherichia coli O157:H7Mutations: A239K, A173N, A172E, N367R, A83K, A82D
Gene Names: malE
Find proteins for P0AEY0 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AEY0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein hairless
B, D
38Drosophila melanogasterGene Names: H
Find proteins for Q02308 (Drosophila melanogaster)
Go to UniProtKB:  Q02308
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Suppressor of hairless protein
E, F
424Drosophila melanogasterMutations: G183N, T57R
Gene Names: Su(H) (dRBP-JK)
Find proteins for P28159 (Drosophila melanogaster)
Go to UniProtKB:  P28159
Entity ID: 4
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*AP*TP*CP*TP*TP*TP*CP*CP*CP*AP*CP*AP*GP*T)-3')G15Mus musculus
Entity ID: 5
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*TP*AP*CP*TP*GP*TP*GP*GP*GP*AP*AP*AP*GP*A)-3')H15Mus musculus
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MTT
Query on MTT

Download SDF File 
Download CCD File 
A, C
MALTOTETRAOSE
C24 H42 O21
LUEWUZLMQUOBSB-ZLBHSGTGSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, C, D, E, F
ethane-1,2-diol
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.14 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.173 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 177.710α = 90.00
b = 93.890β = 109.83
c = 154.390γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXphasing
BUSTERrefinement
XDSdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-09-30 
  • Released Date: 2016-06-15 
  • Deposition Author(s): Kovall, R.A., Yuan, Z.

Funding OrganizationCountryGrant Number
National Institutes of Health/National Cancer InstituteUnited StatesCA178974

Revision History 

  • Version 1.0: 2016-06-15
    Type: Initial release
  • Version 1.1: 2016-07-20
    Type: Database references
  • Version 1.2: 2017-09-27
    Type: Author supporting evidence, Derived calculations