2WQJ

Crystal structure of a truncated variant of the human p73 tetramerization domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 

wwPDB Validation   3D Report Full Report


This is version 1.3 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 U S A 106: 17705

  • DOI: 10.1073/pnas.0905867106
  • Primary Citation of Related Structures:  
    2WQI, 2WQJ, 2WTT

  • 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 members, we solved the crystal structure of the human p73 tetramerization domain (residues 351-399) ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TUMOR PROTEIN P73
AA [auth 1], BA [auth 2], A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
35Homo sapiensMutation(s): 0 
Gene Names: TP73P73
UniProt & NIH Common Fund Data Resources
Find proteins for O15350 (Homo sapiens)
Explore O15350 
Go to UniProtKB:  O15350
PHAROS:  O15350
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.85α = 90
b = 98.93β = 91.77
c = 120.12γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation, Other