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FEBS Lett. 1998 Aug 14;433(1-2):73-7.

Direct association of presenilin-1 with beta-catenin.

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  • 1Laboratory for Alzheimer's Disease, Brain Science Institute, RIKEN, Saitama, Japan.

Abstract

Families bearing mutations in the presenilin-1 (PSI) gene develop Alzheimer's disease (AD). However, the mechanism through which PS1 causes AD is unclear. The co-immunoprecipitation with PS1 in transfected COS-7 cells indicates that PSI directly interacts with endogenous beta-catenin, and the interaction requires residues 322450 of PSI and 445-676 of beta-catenin. Both proteins are co-localized in the endoplasmic reticulum. Over-expression of PS1 reduces the level of cytoplasmic beta-catenin, and inhibits beta-catenin-T cell factor-regulated transcription. These results indicate that PSI plays a role as inhibitor of the beta-catenin signal, which may be connected with the AD dysfunction.

PMID:
9738936
[PubMed - indexed for MEDLINE]
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