6SL6 image
Entry Detail
PDB ID:
6SL6
Keywords:
Title:
p53 charged core
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2019-08-18
Release Date:
2020-03-11
Method Details:
Experimental Method:
Resolution:
1.67 Å
R-Value Free:
0.18
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Cellular tumor antigen p53
Mutations:A138G, L252K, T256R, R267L, N268D
Chain IDs:A
Chain Length:248
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Thermodynamic and Evolutionary Coupling between the Native and Amyloid State of Globular Proteins.
Cell Rep 31 107512 107512 (2020)
PMID: 32294448 DOI: 10.1016/j.celrep.2020.03.076

Abstact

The amyloid-like aggregation propensity present in most globular proteins is generally considered to be a secondary side effect resulting from the requirements of protein stability. Here, we demonstrate, however, that mutations in the globular and amyloid state are thermodynamically correlated rather than simply associated. In addition, we show that the standard genetic code couples this structural correlation into a tight evolutionary relationship. We illustrate the extent of this evolutionary entanglement of amyloid propensity and globular protein stability. Suppressing a 600-Ma-conserved amyloidogenic segment in the p53 core domain fold is structurally feasible but requires 7-bp substitutions to concomitantly introduce two aggregation-suppressing and three stabilizing amino acid mutations. We speculate that, rather than being a corollary of protein evolution, it is equally plausible that positive selection for amyloid structure could have been a driver for the emergence of globular protein structure.

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Primary Citation of related structures