3E1K

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

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
  • Primary Citation of Related Structures:  
    3E1K

  • 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 between inert and active gene expression ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Galactose/lactose metabolism regulatory protein GAL80
A, C, E, G, I, K, M, O
A, C, E, G, I, K, M, O
465Kluyveromyces lactisMutation(s): 0 
Gene Names: GAL80
UniProt
Find proteins for Q06433 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Explore Q06433 
Go to UniProtKB:  Q06433
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06433
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Lactose regulatory protein LAC9
B, D, F, H, J, L, N, P
B, D, F, H, J, L, N, P
22N/AMutation(s): 0 
UniProt
Find proteins for P08657 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Explore P08657 
Go to UniProtKB:  P08657
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08657
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.1α = 90
b = 160.5β = 94.7
c = 132.6γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
DMphasing
TNTrefinement
PDB_EXTRACTdata extraction
HKL-3000data collection
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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