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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Binding of amyloid beta-peptide to mitochondrial hydroxyacyl-CoA dehydrogenase (ERAB): regulation of an SDR enzyme activity with implications for apoptosis in Alzheimer's disease.

The intracellular amyloid beta-peptide (A beta) binding protein, ERAB, a member of the short-chain dehydrogenase/reductase (SDR) family, is known to mediate apoptosis in different cell lines and to be a class II hydroxyacyl-CoA dehydrogenase. The A beta peptide inhibits the enzymatic reaction in a mixed type fashion with a Ki of 1.2 micromol/l and a KiES of 0.3 micromol/l, using 3-hydroxybutyryl-CoA. The peptide region necessary for inhibition comprises residues 12-24 of A beta1-40, covering the 16-20 fragment, which is the minimum sequence for the blockade of A beta polymerization, but that minimal fragment is not sufficient for more than marginal inhibition. The localization of ERAB to the endoplasmic reticulum and mitochondria suggests a complex interaction with components of the programmed cell death machinery. The interaction of A beta with ERAB further links oxidoreductase activity with both apoptosis and amyloid toxicity.[1]


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