1PCZ

STRUCTURE OF TATA-BINDING PROTEIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of a hyperthermophilic archaeal TATA-box binding protein.

DeDecker, B.S.O'Brien, R.Fleming, P.J.Geiger, J.H.Jackson, S.P.Sigler, P.B.

(1996) J.Mol.Biol. 264: 1072-1084

  • DOI: 10.1006/jmbi.1996.0697

  • PubMed Abstract: 
  • This study analyzes the three-dimensional structure of the TATA-box binding protein (TBP) from the hyperthermophilic archaea Pyrococcus woesei. The crystal structure of P. woesei TBP (PwTBP) was solved at 2.2 A by X-ray diffraction and as expected fr ...

    This study analyzes the three-dimensional structure of the TATA-box binding protein (TBP) from the hyperthermophilic archaea Pyrococcus woesei. The crystal structure of P. woesei TBP (PwTBP) was solved at 2.2 A by X-ray diffraction and as expected from sequence homology (36% to 41% identical to eukaryotic TBPs) its overall structure is very similar to eukaryotic TBPs. The thermal unfolding transition temperature of this protein was measured by differential scanning calorimetry to be 101 degrees C, which is more than 40 degrees C higher than that of yeast TBP. Preliminary titration calorimetry data show that the affinity of PwTBP for its DNA target, unlike its eukaryotic counterparts, is enhanced by increasing the temperature and salt concentration. The structure reveals possible explanations for this thermostability and these unusual DNA binding properties. The crystal structure of this hyperthermostable protein was compared to its mesophilic homologs and analyzed for differences in the native structure that may contribute to thermostability. Differences found were: (1) a disulfide bond not found in mesophilic counterparts; (2) an increased number of surface electrostatic interactions; (3) more compact protein packing. The presumed DNA binding surface of PwTBP, like its eukaryotic counterparts, is hydrophobic but the electrostatic profile surrounding the protein is relatively neutral compared to the asymmetric positive potential that surrounds eukaryotic TBPs. The total reliance on a hydrophobic interface with DNA may explain the enhanced affinity of PwTBP for its DNA promoter at higher temperatures and increased salt concentration.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry and the Howard Hughes Medical Institute, Yale University, New Haven, CT 06511-8114, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TATA-BINDING PROTEIN
A, B
191Pyrococcus woeseiGene Names: tbp
Find proteins for P62001 (Pyrococcus woesei)
Go to UniProtKB:  P62001
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.218 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 89.620α = 90.00
b = 89.620β = 90.00
c = 141.280γ = 120.00
Software Package:
Software NamePurpose
SHELXL-96phasing
SHELXL-96model building
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-01-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance