6WCY image
Entry Detail
PDB ID:
6WCY
Title:
N160D Deamidation Mutant of Human gammaD-Crystallin
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-03-31
Release Date:
2021-01-20
Method Details:
Experimental Method:
Resolution:
1.20 Å
R-Value Free:
0.19
R-Value Work:
0.16
R-Value Observed:
0.17
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Gamma-crystallin D
Mutations:N161D
Chain IDs:A, B
Chain Length:173
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Assessing the Structures and Interactions of gamma D-Crystallin Deamidation Variants.
Structure 29 284 291.e3 (2021)
PMID: 33264606 DOI: 10.1016/j.str.2020.11.006

Abstact

Cataracts involve the deposition of the crystallin proteins in the vertebrate eye lens, causing opacification and blindness. They are associated with either genetic mutation or protein damage that accumulates over the lifetime of the organism. Deamidation of Asn residues in several different crystallins has been observed and is frequently invoked as a cause of cataract. Here, we investigated the properties of Asp variants, deamidation products of γD-crystallin, by solution NMR, X-ray crystallography, and other biophysical techniques. No substantive structural or stability changes were noted for all seven Asn to Asp γD-crystallins. Importantly, no changes in diffusion interaction behavior could be detected. Our combined experimental results demonstrate that introduction of single Asp residues on the surface of γD-crystallin by deamidation is unlikely to be the driver of cataract formation in the eye lens.

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Primary Citation of related structures