2WQI

Crystal structure of the human p73 tetramerization domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Evolution of P53, P63, and P73: Implication for Heterotetramer Formation.

Joerger, A.C.Rajagopalan, S.Natan, E.Veprintsev, D.B.Robinson, C.V.Fersht, A.R.

(2009) Proc.Natl.Acad.Sci.USA 106: 17705

  • DOI: 10.1073/pnas.0905867106
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Oligomerization of members of the p53 family of transcription factors (p53, p63, and p73) is essential for their distinct functions in cell-cycle control and development. To elucidate the molecular basis for tetramer formation of the various family m ...

    Oligomerization of members of the p53 family of transcription factors (p53, p63, and p73) is essential for their distinct functions in cell-cycle control and development. To elucidate the molecular basis for tetramer formation of the various family members, we solved the crystal structure of the human p73 tetramerization domain (residues 351-399). Similarly to the canonical p53 tetramer, p73 forms a tetramer with D(2) symmetry that can be described as a dimer of dimers. The most striking difference between the p53 and p73 tetramerization domain is the presence of an additional C-terminal helix in p73. This helix, which is conserved in p63, is essential for stabilizing the overall architecture of the tetramer, as evidenced by the different oligomeric structures observed for a shortened variant lacking this helix. The helices act as clamps, wrapping around the neighboring dimer and holding it in place. In addition, we show by mass spectrometry that the tetramerization domains of p63 and p73, but not p53, fully exchange, with different mixed tetramers present at equilibrium, albeit at a relatively slow rate. Taken together, these data provide intriguing insights into the divergent evolution of the oligomerization domain within the p53 family, from the ancestral p63/p73-like protein toward smaller, less promiscuous monomeric building blocks in human p53, allowing functional separation of the p53 pathway from that of its family members.


    Organizational Affiliation

    Centre for Protein Engineering, Medical Research Council, Hills Road, Cambridge CB2 0QH, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TUMOR PROTEIN P73
A, B, C, D
51Homo sapiensMutation(s): 0 
Gene Names: TP73 (P73)
Find proteins for O15350 (Homo sapiens)
Go to Gene View: TP73
Go to UniProtKB:  O15350
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.209 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 76.110α = 90.00
b = 76.110β = 90.00
c = 79.630γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-08-21 
  • Released Date: 2009-10-06 
  • Deposition Author(s): Joerger, A.C.

Revision History 

  • Version 1.0: 2009-10-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance