8H8M image
Entry Detail
PDB ID:
8H8M
Title:
Crystal structure of apo-E53F/E57F/E60F/E64F-rHLFr
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-10-23
Release Date:
2023-10-04
Method Details:
Experimental Method:
Resolution:
1.50 Å
R-Value Free:
0.17
R-Value Work:
0.15
Space Group:
F 4 3 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Ferritin light chain
Mutations:E53F,E57F,E60F,E64F
Chain IDs:A
Chain Length:174
Number of Molecules:1
Biological Source:Equus caballus
Primary Citation
Elucidating Conformational Dynamics and Thermostability of Designed Aromatic Clusters by Using Protein Cages.
Chemistry 29 e202300488 e202300488 (2023)
PMID: 37070368 DOI: 10.1002/chem.202300488

Abstact

Multiple aromatic residues assemble to form higher ordered structures known as "aromatic clusters" in proteins and play essential roles in biological systems. However, the stabilization mechanism and dynamic behavior of aromatic clusters remain unclear. This study describes designed aromatic interactions confined within a protein cage to reveal how aromatic clusters affect protein stability. The crystal structures and calorimetric measurements indicate that the formation of inter-subunit phenylalanine clusters enhance the interhelix interactions and increase the melting temperature. Theoretical calculations suggest that this is caused by the transformation of the T-shaped geometry into π-π stacking at high temperatures, and the hydration entropic gain. Thus, the isolated nanoenvironment in a protein cage allows reconstruction and detailed analysis of multiple clustering residues for elucidating the mechanisms of various biomolecular interactions in nature which can be applied to design of bionanomaterials.

Legend

Protein

Chemical

Disease

Primary Citation of related structures