Nuclear signaling: a common function of presenilin substrates?
1Adolf-Butenandt-lnstitute, Department of Biochemistry, Ludwig-Maximilians-University, Munich, Germany. hsteiner@pbm.med.uni-muenchen.de
Abstract:
Major progress has recently been made in the characterization of the secretases involved in endoproteolytic processing of the Alzheimer's disease (AD)-associated beta-amyloid precursor protein, betaAPP. betaAPP is the precursor of the amyloid beta-peptide, which is a major constituent of amyloid plaques in the brains of Alzheimer patients. It is now commonly believed that Abeta plays a pivotal role in the pathogenesis of AD, and that inhibiting the production of Abeta may help to treat or to prevent the disease. With beta-secretase and the presenilins, two essential factors in the proteolytic generation of Abeta have now been identified. However, very little is still known about the biological function of the long-known betaAPP. In this review we will discuss a novel putative function of betaAPP in nuclear signaling, an activity, that betaAPP may share with other presenilin substrates such as Notch.
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