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- W2023161301 abstract "Exposure to ultraviolet radiation (UVR) is a significant risk factor for age-related cataract, a disease of the human lens and the most prevalent cause of blindness in the world. Cataract pathology involves protein misfolding and aggregation of the primary proteins of the lens, the crystallins. Human γD-crystallin (HγD-Crys) is a major γ-crystallin in the nucleus of the human lens. We report here analysis of UVR-induced damage to HγD-Crys in vitro. Irradiation of solutions of recombinant HγD-Crys with UVA/UVB light produced a rise in solution turbidity due to polymerization of the monomeric crystallins into higher molecular weight aggregates. A significant fraction of this polymerized protein was covalently linked. Photoaggregation of HγD-Crys required oxygen and its rate was protein concentration and UVR dose dependent. To investigate the potential roles of individual tryptophan residues in photoaggregation, triple W:F mutants of HγD-Crys were irradiated. Surprisingly, despite reducing UVR absorbing capacity, multiple W:F HγD-Crys mutant proteins photoaggregated more quickly and extensively than wild type. The results reported here are consistent with previous studies that postulated that an energy transfer mechanism between the highly conserved pairs of tryptophan residues in HγD-Crys could be protective against UVR-induced photodamage." @default.
- W2023161301 created "2016-06-24" @default.
- W2023161301 creator A5002701325 @default.
- W2023161301 creator A5017531541 @default.
- W2023161301 date "2013-06-20" @default.
- W2023161301 modified "2023-10-03" @default.
- W2023161301 title "Tryptophan Cluster Protects Human γD‐Crystallin from Ultraviolet Radiation‐Induced Photoaggregation <i>In Vitro</i>" @default.
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- W2023161301 doi "https://doi.org/10.1111/php.12096" @default.
- W2023161301 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3823069" @default.
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