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An aberrant sugar modification of BACE1 blocks its lysosomal targeting in Alzheimer's disease
Abstract
The β‐site amyloid precursor protein cleaving enzyme‐1 (BACE1), an essential protease for the generation of amyloid‐β (Aβ) peptide, is a major drug target for Alzheimer's disease (AD). However, there is a concern that inhibiting BACE1 could also affect several physiological functions. Here, we show that BACE1 is modified with bisecting N‐acetylglucosamine (GlcNAc), a sugar modification highly expressed in brain, and demonstrate that AD patients have higher levels of bisecting GlcNAc on BACE1. Analysis of knockout mice lacking the biosynthetic enzyme for bisecting GlcNAc, GnT‐III ( Mgat3 ), revealed that cleavage of Aβ‐precursor protein (APP) by BACE1 is reduced in these mice, resulting in a decrease in Aβ plaques and improved cognitive function. The lack of this modification directs BACE1 to late endosomes/lysosomes where it is less colocalized with APP, leading to accelerated lysosomal degradation. Notably, other BACE1 substrates, CHL1 and contactin‐2, are normally cleaved in GnT‐III‐deficient mice, suggesting that the effect of bisecting GlcNAc on BACE1 is selective to APP. Considering that GnT‐III‐deficient mice remain healthy, GnT‐III may be a novel and promising drug target for AD therapeutics.
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Glycosylation has been implicated in the pathological increases in BACE1 stability seen in response to oxidative stress, with bisecting N-acetylglucosamine (GlcNAc) having been shown to prevent lysosomal degradation of BACE1.
“Glycosylation has also been implicated in the pathological increases in BACE1 stability seen in response to oxidative stress, with bisecting N‐acetylglucosamine (GlcNAc), catalyzed by GlcNAc transferase Gnt‐III having been shown to prevent lysosomal degradation of BACE1.”
From BACE1: More than just a β‐secretase (2022) · cites this paper as [76]
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“Deposition of amyloid-b (Ab) peptide in the brain is considered to represent the initial event in disease development (Karran et al, 2011).”
BackgroundTwo amyloid precursor protein transgenic mouse models with Alzheimer disease-like pathology
Sturchler-Pierrat, C., Abramowski, D., Duke, M., Wiederhold, K.-H., Mistl, C., Rothacher, S., Ledermann, B., Bürki, K., Frey, P., Paganetti, P. A., et al. (1997) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.94.24.13287 · Cited by 1,507
Self-citationSingle App knock-in mouse models of Alzheimer’s disease
Saito, T., Matsuba, Y., Mihira, N., Takano, J., Nilsson, P., Itohara, S., Iwata, N., & Saido, T. C. (2014) · Nature Neuroscience · doi:10.1038/nn.3697 · Cited by 1,366
Self-citationControl of Peripheral Nerve Myelination by the ß-Secretase BACE1
Willem, M., Garratt, A. N., Novak, B., Citron, M., Kaufmann, S., Rittger, A., DeStrooper, B., Saftig, P., Birchmeier, C., & Haass, C. (2006) · Science · doi:10.1126/science.1132341 · Cited by 703
Metabolism, Cell Surface Organization, and Disease
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VPS35 haploinsufficiency increases Alzheimer’s disease neuropathology
Wen, L., Tang, F.-L., Hong, Y., Luo, S.-W., Wang, C.-L., He, W., Shen, C., Jung, J.-U., Xiong, F., Lee, D.-H., et al. (2011) · Journal of Cell Biology · doi:10.1083/jcb.201105109 · Cited by 270
The Low Density Lipoprotein Receptor-related Protein (LRP) Is a Novel β-Secretase (BACE1) Substrate
von Arnim, C. A. F., Kinoshita, A., Peltan, I. D., Tangredi, M. M., Herl, L., Lee, B. M., Spoelgen, R., Hshieh, T. T., Ranganathan, S., Battey, F. D., et al. (2005) · Journal of Biological Chemistry · doi:10.1074/jbc.m414248200 · Cited by 258
Depletion of GGA1 and GGA3 Mediates Postinjury Elevation of BACE1
Walker, K. R., Kang, E. L., Whalen, M. J., Shen, Y., & Tesco, G. (2012) · The Journal of Neuroscience · doi:10.1523/jneurosci.5491-11.2012 · Cited by 66
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BackgroundInflammatory response of microglia to prions is controlled by sialylation of PrPSc
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Metadata
- Authors
- Kizuka, Y., Kitazume, S., Fujinawa, R., Saito, T., Iwata, N., Saido, T. C., Nakano, M., Yamaguchi, Y., Hashimoto, Y., Staufenbiel, M., Hatsuta, H., Murayama, S., Manya, H., Endo, T., & Taniguchi, N.
- Venue
- EMBO Molecular Medicine
- Published
- 2015-01-15
- Volume
- 7
- Issue
- 2
- Pages
- 175-189
- ISSN
- 1757-4676
- 1757-4684
- PMC
- PMC4328647
- Cited by
- 185
- References
- 10
- Language
- en
- Funders
- RIKEN
- Systems Glycobiology Research project
- Special Postdoctoral Researchers Program
- Incentive Research
- Japan Society for the Promotion of Science
- Scientific Research
- Scientific Research on Innovative Areas
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