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[Aging mechanisms of proteins]
P Gillery1, J C Monboisse, F X Maquart
1Laboratoire de Biochimie URA CNRS, Faculté de Médecine, Université de Reims Champagne Ardenne.
Diabete & Metabolisme
|January 1, 1991
Summary
Protein glycation, a nonenzymatic reaction with glucose, contributes to aging by altering protein structure and function. This process generates harmful free radicals, initiating protein degradation and impacting connective tissues.
Area of Science:
- Biochemistry
- Molecular Biology
- Aging Research
Context:
- Aging affects all biomolecules, but mechanisms remain unclear.
- Protein aging involves structural changes and proteolytic cleavage.
- Nonenzymatic glycation is a widespread aging reaction affecting proteins.
Purpose:
- To investigate the role of nonenzymatic glycation in protein aging.
- To elucidate the chemical mechanisms of glycation-induced protein damage.
- To understand the consequences of glycation on protein structure, function, and degradation.
Summary:
- Nonenzymatic glycation occurs when circulating glucose reacts with protein amino groups, particularly in extracellular connective tissues.
- Glycation alters protein structure, inactivating enzymes and disrupting supramolecular assemblies like basement membranes.
- Glycated proteins generate reactive oxygen species, leading to further protein degradation, especially of collagen.
Impact:
- Glycation contributes to age-related molecular damage and disease pathogenesis.
- Understanding glycation is crucial for developing interventions against aging and diabetes complications.
- This research highlights glycation as a key factor in the functional decline of long-lived proteins.