Cu2+-binding to S100B triggers polymerization of disulfide cross-linked tetramers with enhanced chaperone activity against amyloid-β aggregation. Issue 3 (16th December 2020) - Cristóvão, Joana S.
Abstract : A mechanism of chemical regulation of the S100B chaperone via Cu 2+ induced assembly of S100B cross-linked oligomers with enhanced anti-amyloid aggregation activity. Abstract : S100B is an extracellular protein implicated in Alzheimer's Disease and a suppressor of amyloid-β aggregation. Herein we report a mechanism tying Cu 2+ binding to a change in assembly state yielding disulfide cross-linked oligomers with higher anti-aggregation activity. This chemical control of chaperone function illustrates a regulatory process relevant under metal and proteostasis dysfunction as in neurodegeneration.