1ERJ

CRYSTAL STRUCTURE OF THE C-TERMINAL WD40 DOMAIN OF TUP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the C-terminal domain of Tup1, a corepressor of transcription in yeast.

Sprague, E.R.Redd, M.J.Johnson, A.D.Wolberger, C.

(2000) EMBO J. 19: 3016-3027

  • DOI: 10.1093/emboj/19.12.3016

  • PubMed Abstract: 
  • The Tup1-Ssn6 corepressor complex regulates the expression of several sets of genes, including genes that specify mating type in the yeast Saccharomyces cerevisiae. Repression of mating-type genes occurs when Tup1-Ssn6 is brought to the DNA by the Ma ...

    The Tup1-Ssn6 corepressor complex regulates the expression of several sets of genes, including genes that specify mating type in the yeast Saccharomyces cerevisiae. Repression of mating-type genes occurs when Tup1-Ssn6 is brought to the DNA by the Matalpha2 DNA-binding protein and assembled upstream of a- and haploid-specific genes. We have determined the 2.3 A X-ray crystal structure of the C-terminal domain of Tup1 (accesion No. 1ERJ), a 43 kDa fragment that contains seven copies of the WD40 sequence motif and binds to the Matalpha2 protein. Moreover, this portion of the protein can partially substitute for full-length Tup1 in bringing about transcriptional repression. The structure reveals a seven-bladed beta propeller with an N-terminal subdomain that is anchored to the side of the propeller and extends the beta sheet of one of the blades. Point mutations in Tup1 that specifically affect the Tup1-Matalpha2 interaction cluster on one surface of the propeller. We identified regions of Tup1 that are conserved among the fungal Tup1 homologs and may be important in protein-protein interactions with additional components of the Tup1-mediated repression pathways.


    Organizational Affiliation

    Department of Biophysics and Biophysical Chemistry and Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTIONAL REPRESSOR TUP1
A, B, C
393Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: TUP1 (AAR1, AER2, AMM1, CYC9, FLK1, SFL2, UMR7)
Find proteins for P16649 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P16649
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.228 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 119.280α = 90.00
b = 119.280β = 90.00
c = 77.070γ = 120.00
Software Package:
Software NamePurpose
MLPHAREphasing
SCALEPACKdata scaling
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-07-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-08-09
    Type: Refinement description, Source and taxonomy