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• W2132682847 abstract "In addition to disrupting the regulated intramembraneous proteolysis of key substrates, mutations in the presenilins also alter calcium homeostasis, but the mechanism linking presenilins and calcium regulation is unresolved. At rest, cytosolic Ca2+ is maintained at low levels by pumping Ca2+ into stores in the endoplasmic reticulum (ER) via the sarco ER Ca2+-ATPase (SERCA) pumps. We show that SERCA activity is diminished in fibroblasts lacking both PS1 and PS2 genes, despite elevated SERCA2b steady-state levels, and we show that presenilins and SERCA physically interact. Enhancing presenilin levels in Xenopus laevis oocytes accelerates clearance of cytosolic Ca2+, whereas higher levels of SERCA2b phenocopy PS1 overexpression, accelerating Ca2+ clearance and exaggerating inositol 1,4,5-trisphosphate–mediated Ca2+ liberation. The critical role that SERCA2b plays in the pathogenesis of Alzheimer's disease is underscored by our findings that modulating SERCA activity alters amyloid β production. Our results point to a physiological role for the presenilins in Ca2+ signaling via regulation of the SERCA pump." @default.
• W2132682847 created "2016-06-24" @default.
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• W2132682847 date "2008-06-30" @default.
• W2132682847 modified "2023-10-15" @default.
• W2132682847 title "SERCA pump activity is physiologically regulated by presenilin and regulates amyloid β production" @default.
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• W2132682847 doi "https://doi.org/10.1083/jcb.200706171" @default.
• W2132682847 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2442205" @default.
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