Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15253.37 
• Atom Count: 1076 
• Residue Count: 124 
• Unique protein chains: 1

2J10

p53 tetramerization domain mutant T329F Q331K

• DOI: 10.2210/pdb2J10/pdb
• BMRB: 7252

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Mutation(s): 2 


• Deposited: 2006-08-08 Released: 2007-08-28 
• Deposition Author(s): Carbajo, R.J., Mora, P., Sanchez del Pino, M.M., Perez-Paya, E., Pineda-Lucena, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 30 
• Selection Criteria: TOTAL ENERGY 

Literature

Solvent-exposed residues located in the beta-sheet modulate the stability of the tetramerization domain of p53--a structural and combinatorial approach.

Mora, P., Carbajo, R.J., Pineda-Lucena, A., Sanchez del Pino, M.M., Perez-Paya, E.

(2008) Proteins 71: 1670-1685

• PubMed: 18076077 
• DOI: 10.1002/prot.21854
• Primary Citation of Related Structures:  
  2J11, 2J0Z


• PubMed Abstract: 
  

The role of hydrophobic amino acids in the formation of hydrophobic cores as one of the major driving forces in protein folding has been extensively studied. However, the implication of neutral solvent-exposed amino acids is less clear and available information is scarce. We have used a combinatorial approach to study the structural relevance of three solvent-exposed residues (Tyr(327), Thr(329), and Gln(331)) located in thebeta-sheet of the tetramerization domain of the tumor suppressor p53 (p53TD). A conformationally defined peptide library was designed where these three positions were randomized. The library was screened for tetramer stability. A set of p53TD mutants containing putative stabilizing or destabilizing residue combinations was synthesized for a thermodynamic characterization. Unfolding experiments showed a wide range of stabilities, with T(m) values between 27 and 83 degrees C. Wild type p53TD and some highly destabilized and stabilized mutants were further characterized. Thermodynamic and biophysical data indicated that these proteins were folded tetramers, with the same overall structure, in equilibrium with unfolded monomers. An NMR study confirmed that the main structural features of p53TD are conserved in all the mutants analyzed. The thermodynamic stability of the different p53TD mutants showed a strong correlation with parameters that favor formation and stabilization of the beta-sheet. We propose that stabilization through hydrophobic interactions of key secondary structure elements might be the underlying mechanism for the strong influence of solvent-exposed residues in the stability of p53TD.

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Organizational Affiliation: 

Department of Medicinal Chemistry, Centro de Investigación Príncipe Felipe, E-46013 Valencia, Spain.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CELLULAR TUMOR ANTIGEN P53	A, B, C, D	31	Homo sapiens	Mutation(s): 2  Gene Names: TP53 (P53)
Find proteins for P04637 (Homo sapiens) Go to Gene View: TP53 Go to UniProtKB:  P04637

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 30 
• Selection Criteria: TOTAL ENERGY 
• Olderado: 2J10 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-08-08 
• Released Date: 2007-08-28 
• Deposition Author(s): Carbajo, R.J., Mora, P., Sanchez del Pino, M.M., Perez-Paya, E., Pineda-Lucena, A.

Revision History 

• Version 1.0: 2007-08-28
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-04-25
  Type: Data collection, Database references