Abstract
To differentiate multiple activities of presenilin 1 (PS1), we generated transgenic mice expressing two human PS1 alleles: one with the aspartate to alanine mutation at residue 257 (hPS1D257A) that impairs the proteolytic activity of PS1, and the other deleting amino acids 340–371 of the hydrophilic loop sequence (hPS1Δcat) essential for β-catenin interaction. We show here that although hPS1Δcat is fully competent in rescuing the PS1 -null lethal phenotype, hPS1D257A does not exhibit developmental activity. hPS1D257A also leads to the concurrent loss of the proteolytic processing of Notch and β-amyloid precursor protein (APP) and the generation of β-amyloid peptides (Aβ). Further, by measuring the levels of endogenous Aβ X-40 and Aβ X-42 in primary neuronal cultures, we confirmed the concept that PS1 is indispensable for the production of secreted Aβ.
Bibliography
Xia, X., Wang, P., Sun, X., Soriano, S., Shum, W.-K., Yamaguchi, H., Trumbauer, M. E., Takashima, A., Koo, E. H., & Zheng, H. (2002). The aspartate-257 of presenilin 1 is indispensable for mouse development and production of β-amyloid peptides through β-catenin-independent mechanisms. Proceedings of the National Academy of Sciences, 99(13), 8760â8765.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 28, 2002, 6:26 p.m.) |
Deposited | 3 years, 4 months ago (April 12, 2022, 11:16 p.m.) |
Indexed | 1 year, 2 months ago (June 17, 2024, 3:09 p.m.) |
Issued | 23 years, 2 months ago (June 17, 2002) |
Published | 23 years, 2 months ago (June 17, 2002) |
Published Online | 23 years, 2 months ago (June 17, 2002) |
Published Print | 23 years, 2 months ago (June 25, 2002) |
@article{Xia_2002, title={The aspartate-257 of presenilin 1 is indispensable for mouse development and production of β-amyloid peptides through β-catenin-independent mechanisms}, volume={99}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.132045399}, DOI={10.1073/pnas.132045399}, number={13}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Xia, Xuefeng and Wang, Pei and Sun, Xiaoyan and Soriano, Salvador and Shum, Wan-Kyng and Yamaguchi, Haruyasu and Trumbauer, Myrna E. and Takashima, Akihiko and Koo, Edward H. and Zheng, Hui}, year={2002}, month=jun, pages={8760–8765} }