3E1K

Crystal structure of Kluyveromyces lactis Gal80p in complex with the acidic activation domain of Gal4p


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Interaction between an Acidic Transcriptional Activator and Its Inhibitor: THE MOLECULAR BASIS OF Gal4p RECOGNITION BY Gal80p.

Thoden, J.B.Ryan, L.A.Reece, R.J.Holden, H.M.

(2008) J.Biol.Chem. 283: 30266-30272

  • DOI: 10.1074/jbc.M805200200

  • PubMed Abstract: 
  • The GAL genes, which encode the enzymes required for normal galactose metabolism in yeast, are transcriptionally regulated by three proteins: Gal4p, an activator; Gal80p, an inhibitor; and Gal3p, a galactose sensor. These proteins control the switch ...

    The GAL genes, which encode the enzymes required for normal galactose metabolism in yeast, are transcriptionally regulated by three proteins: Gal4p, an activator; Gal80p, an inhibitor; and Gal3p, a galactose sensor. These proteins control the switch between inert and active gene expression. The transcriptional activation function of Gal4p is rendered inactive in the presence of Gal80p. Here we present the three-dimensional structure of a complex between the acidic activation domain of Gal4p and Gal80p. The transactivation domain initiates with an extended region of polypeptide chain followed by two turns of an amphipathic alpha-helix. It fits into and across a deep cleft within the Gal80p dimer with the protein-protein interface defined primarily by hydrophobic interactions. A disordered loop in the apo-Gal80p structure (Asp-309 to Ser-316) becomes well-defined upon binding of the transactivation domain. This investigation provides a new molecular scaffold for understanding previous biochemical and genetic studies.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galactose/lactose metabolism regulatory protein GAL80
A, C, E, G, I, K, M, O
465Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37)Mutation(s): 0 
Gene Names: GAL80
Find proteins for Q06433 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Go to UniProtKB:  Q06433
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Lactose regulatory protein LAC9
B, D, F, H, J, L, N, P
22Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37)Mutation(s): 0 
Gene Names: LAC9
Find proteins for P08657 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Go to UniProtKB:  P08657
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 101.100α = 90.00
b = 160.500β = 94.70
c = 132.600γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data collection
SCALEPACKdata scaling
TNTrefinement
HKL-3000data scaling
DMphasing
DENZOdata reduction
HKL-3000data reduction
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-08-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description