2HAP

STRUCTURE OF A HAP1-18/DNA COMPLEX REVEALS THAT PROTEIN/DNA INTERACTIONS CAN HAVE DIRECT ALLOSTERIC EFFECTS ON TRANSCRIPTIONAL ACTIVATION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.248 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of HAP1-18-DNA implicates direct allosteric effect of protein-DNA interactions on transcriptional activation.

King, D.A.Zhang, L.Guarente, L.Marmorstein, R.

(1999) Nat Struct Biol 6: 22-27

  • DOI: 10.1038/4893
  • Primary Citation of Related Structures:  
    2HAP

  • PubMed Abstract: 
  • HAP1 is a yeast transcriptional activator that binds with equal affinity to the dissimilar upstream activation sequences UAS1 and UAS(CYC7), but activates transcription differentially when bound to each site. HAP1-18 harbors an amino acid change in t ...

    HAP1 is a yeast transcriptional activator that binds with equal affinity to the dissimilar upstream activation sequences UAS1 and UAS(CYC7), but activates transcription differentially when bound to each site. HAP1-18 harbors an amino acid change in the DNA binding domain. While binding UAS1 poorly, HAP1-18 binds UAS(CYC7) with wild-type properties and activates transcription at elevated levels relative to HAP1. We have determined the structure of HAP1-18-UAS(CYC7) and have compared it to HAP1-UAS(CYC7). Unexpectedly, the single amino acid substitution in HAP1-18 nucleates a significantly altered hydrogen bond interface between the protein and DNA resulting in DNA conformational changes and an ordering of one N-terminal arm of the protein dimer along the DNA minor groove. These observations, together with a large subset of transcriptionally defective mutations in the HAP1 DNA-binding domain that map to the HAP1-DNA interface, suggest that protein-DNA interactions may have direct allosteric effects on transcriptional activation.


    Organizational Affiliation

    The Wistar Institute and The Department of Chemistry, University of Pennsylvania, Philadelphia 19104, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (HEME ACTIVATOR PROTEIN)CD81Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: HAP1CYP1
Find proteins for P0CS82 (Saccharomyces cerevisiae)
Explore P0CS82 
Go to UniProtKB:  P0CS82
Protein Feature View
Expand
  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*AP*CP*GP*CP*TP*AP*TP*TP*AP*TP*CP*GP*CP*TP*AP*TP*TP*AP*GP*T)-3')A20N/A
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(*AP*CP*TP*AP*AP*TP*AP*GP*CP*GP*AP*TP*AP*AP*TP*AP*GP*CP*GP*T)-3')B20N/A
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.50 Å
      • R-Value Free: 0.302 
      • R-Value Work: 0.248 
      • R-Value Observed: 0.248 
      • Space Group: P 41 21 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 92.5α = 90
      b = 92.5β = 90
      c = 86.5γ = 90
      Software Package:
      Software NamePurpose
      PHASESphasing
      CCP4model building
      X-PLORrefinement
      XDSdata reduction
      XSCALEdata scaling
      CCP4phasing

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History 

      • Version 1.0: 1999-11-10
        Type: Initial release
      • Version 1.1: 2008-05-22
        Changes: Version format compliance
      • Version 1.2: 2011-07-13
        Changes: Version format compliance
      • Version 1.3: 2011-11-16
        Changes: Atomic model