Previously we have shown that the COOH-terminal fragment (A4CT) of the Alzheimer amyloid protein precursor (APP), which at the NH2-terminus carries the sequence of the amyloid βA4 protein, forms highly insoluble aggregates [EMBO J. (1988) 7, 949-957]. Here we report that aggregation is prevented if A4CT is expressed in vitro with a signal sequence at the NH2-terminus (SPA4CT) under conditions which allow membrane insertion. Aggregates from SPA4CT are obtained after removal of membranes by chloroform/methanol extraction or heating. © 1992.
Dyrks, T., Dyrks, E., Masters, C., & Beyreuther, K. (1992). Membrane inserted APP fragments containing the βA4 sequence of Alzheimer’s disease do not aggregate. FEBS Letters, 309(1), 20–24. https://doi.org/10.1016/0014-5793(92)80730-5