Abstract:
:4-Hydroxy-2-nonenal (4-HNE) is a reactive aldehyde and a lipid peroxidation product formed in biological tissues under physiological and pathological conditions. Its concentration increases with oxidative stress and induces deleterious modifications of proteins and membranes. Mitochondrial and cytosolic isoforms of creatine kinase were previously shown to be affected by 4-HNE. In the present study, we analyzed the effect of 4-HNE on mitochondrial creatine kinase, an abundant protein from the mitochondrial intermembrane space with a key role in mitochondrial physiology. We show that this effect is double: 4-HNE induces a step-wise loss of creatine kinase activity together with a fast protein aggregation. Protein-membrane interaction is affected and amyloid-like networks formed on the biomimetic membrane. These fibrils may disturb mitochondrial organisation both at the membrane and in the inter membrane space.
journal_name
Mol Membr Bioljournal_title
Molecular membrane biologyauthors
Maniti O,François-Moutal L,Lecompte MF,Vial C,Lagarde M,Guichardant M,Marcillat O,Granjon Tdoi
10.3109/09687688.2015.1023376subject
Has Abstractpub_date
2015-01-01 00:00:00pages
1-10issue
1eissn
0968-7688issn
1464-5203journal_volume
32pub_type
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