Presenilin 1 Associates with Glycogen Synthase Kinase-3β and Its Substrate Tau
Families bearing mutations in the presenilin 1 (PS1) gene develop Alzheimer's disease. Previous studies have shown that the Alzheimer-associated mutations in PS1 increase production of amyloid β protein (Aβ1-42). We now show that PS1 also regulates phosphorylation of the micro-tubule-associated...
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Published in | Proceedings of the National Academy of Sciences - PNAS Vol. 95; no. 16; pp. 9637 - 9641 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
National Academy of Sciences of the United States of America
04.08.1998
National Acad Sciences The National Academy of Sciences |
Subjects | |
Online Access | Get full text |
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Summary: | Families bearing mutations in the presenilin 1 (PS1) gene develop Alzheimer's disease. Previous studies have shown that the Alzheimer-associated mutations in PS1 increase production of amyloid β protein (Aβ1-42). We now show that PS1 also regulates phosphorylation of the micro-tubule-associated protein tau. PS1 directly binds tau and a tau kinase, glycogen synthase kinase 3β (GSK-3β ). Deletion studies show that both tau and GSK-3β bind to the same region of PS1, residues 250-298, whereas the binding domain on tau is the microtubule-binding repeat region. The ability of PS1 to bring tau and GSK-3β into close proximity suggests that PS1 may regulate the interaction of tau with GSK-3β . Mutations in PS1 that cause Alzheimer's disease increase the ability of PS1 to bind GSK-3β and, correspondingly, increase its tau-directed kinase activity. We propose that the increased association of GSK-3β with mutant PS1 leads to increased phosphorylation of tau. |
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Bibliography: | To whom reprint requests should be addressed. kenneth@brain.riken.go.jp. Communicated by Setsuro Ebashi, National Institute for Physiological Sciences, Okazaki, Japan |
ISSN: | 0027-8424 1091-6490 |
DOI: | 10.1073/pnas.95.16.9637 |