Snapin-Mediated BACE1 Retrograde Transport Is Essential for Its Degradation in Lysosomes and Regulation of APP Processing in Neurons
Open accessAbstract
β site amyloid precursor protein (APP)-cleaving enzyme 1 (BACE1) is the major β secretase for generating β-amyloid (Aβ) peptides. The acidic environment of endosomes is optimal for β secretase activity. However, the mechanisms regulating BACE1 traffic from endosomes to lysosomes for degradation are largely unknown. Here, using snapin-deficient mice combined with gene rescue experiments, we reveal that Snapin, as a dynein motor adaptor for late endosomes, mediates BACE1 retrograde transport. hAPP mutant live neurons and mouse brains exhibited BACE1 accumulation within the altered late endocytic organelles and defective lysosomal targeting due to reduced Snapin-dynein coupling. Deleting snapin or disrupting Snapin-dynein coupling reduces BACE1 transport to lysosomes for degradation, thus enhancing APP processing. Overexpressing Snapin in hAPP neurons reduces β site cleavage of APP by enhancing BACE1 turnover. Altogether, our study provides mechanistic insights into the complex regulation of BACE1 level and activity and turnover through retrograde transport, thus controlling Aβ generation in neurons.
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Synaptic protein snapin, an EHD1-binding protein, was identified as a regulator of endosome-to-lysosome retrograde transport of BACE1.
“Recently, the synaptic protein snapin, which is an EHD1-binding protein, was identified as a regulator of the endosome-to-lysosome retrograde transport of BACE1 (27,45).”
From BIN1 regulates BACE1 intracellular trafficking and amyloid-β production (2016) · cites this paper as [27]
The Discussion states that Snapin-mediated retrograde transport delivers BACE1 from late endosomes to somatic lysosomes for degradation. The Results also show impaired BACE1 retrograde transport in snapin-deficient neurons. Our copy does not identify Snapin as an EHD1-binding protein (searched: “EHD1-binding protein snapin” and “EHD1”), so that descriptor is not supported by this source. (LLM, conf=0.86)
Experimental — accuracy not yet measuredThe presence of BACE1-SBP-GFP in late endosomes/lysosomes suggests turnover of BACE1 in the lysosomes.
“suggesting turnover of BACE1 in the lysosomes (Ye and Cai, 2014; Ye et al., 2017; Feng et al., 2017).”
From Distinct anterograde trafficking pathways of BACE1 and amyloid precursor protein from the TGN and the regulation of amyloid-β production (2020) · cites this paper as Ye and Cai, 2014
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- Authors
- Ye, X., & Cai, Q.
- Affiliations
- Rutgers, The State University of New Jersey (US)
- Corresponding author
- Cai, Qian
- Venue
- Cell Reports
- Publisher
- Elsevier BV
- Published
- 2014-01
- Volume
- 6
- Issue
- 1
- Pages
- 24-31
- ISSN
- 2211-1247 (ISSN-L)
- PMC
- PMC3905048
- OpenAlex
- W2042508628
- Cited by
- 63
- References
- 4
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 7 · 2021: 7 · 2020: 3 · 2019: 6 · 2018: 7 · 2017: 8 · 2016: 3 · 2015: 6 · 2014: 4
- FWCI
- 4.67
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Cell Reports (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Rutgers University Community Repository (Rutgers University) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Institutes of Health
- National Institute on Aging (R00AG033658)
- National Institute of Neurological Disorders and Stroke (R01NS089737)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Health Sciences › Medicine › Physiology › Lysosomal Storage Disorders Research
- Keywords
- BACE1, Snapin, retrograde transport, lysosomal degradation, dynein motor, late endosomes, APP processing, amyloid-beta, endosomal trafficking, Alzheimer's disease
- MeSH terms
- Animals, Dyneins, Lysosomes, Neurons, Endosomes, Aspartic Acid Endopeptidases, Amyloid beta-Protein Precursor, Gene Deletion, Protein Transport, Vesicular Transport Proteins, Mice, Amyloid Precursor Protein Secretases, Proteolysis
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