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- W2012095404 abstract "We show that human stefin B, a protease inhibitor from the family of cystatins, is a copper binding protein, unlike stefin A. We have used isothermal titration calorimetry to directly monitor the binding event at pH 7 and pH 5. At pH 7 stefin B shows a picomolar affinity for copper but at pH 5 the affinity is in the nanomolar range. There is no difference in the affinity of copper between the wildtype stefin B (E31 isoform) and a variant (Y31 isoform), whereas the mutant (P79S), which is tetrameric, does not bind copper. The conformation of stefin B remains unaltered by copper binding. It is known that below pH 5 stefin B undergoes a conformational change and amyloid fibril formation. We show that copper binding inhibits the amyloid fibril formation and, to a lesser degree, the initial aggregation. Similarities to and differences from other copper binding amyloidogenic proteins are discussed." @default.
- W2012095404 created "2016-06-24" @default.
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- W2012095404 date "2006-08-29" @default.
- W2012095404 modified "2023-10-04" @default.
- W2012095404 title "High affinity copper binding by stefin B (cystatin B) and its role in the inhibition of amyloid fibrillation" @default.
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- W2012095404 doi "https://doi.org/10.1111/j.1742-4658.2006.05426.x" @default.
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