Purification and cloning of amyloid precursor protein β-secretase from human brain (original) (raw)

Nature volume 402, pages 537–540 (1999)Cite this article

Abstract

Proteolytic processing of the amyloid precursor protein (APP) generates amyloid β (Aβ) peptide, which is thought to be causal for the pathology and subsequent cognitive decline in Alzheimer's disease. Cleavage by β-secretase at the amino terminus of the Aβ peptide sequence, between residues 671 and 672 of APP, leads to the generation and extracellular release of β-cleaved soluble APP1, and a corresponding cell-associated carboxy-terminal fragment. Cleavage of the _C_-terminal fragment by γ-secretase(s) leads to the formation of Aβ. The pathogenic mutation K670M671 → N670L671 at the β-secretase cleavage site in APP2, which was discovered in a Swedish family with familial Alzheimer's disease, leads to increased β-secretase cleavage of the mutant substrate3. Here we describe a membrane-bound enzyme activity that cleaves full-length APP at the β-secretase cleavage site, and find it to be the predominant β-cleavage activity in human brain. We have purified this enzyme activity to homogeneity from human brain using a new substrate analogue inhibitor of the enzyme activity, and show that the purified enzyme has all the properties predicted for β-secretase. Cloning and expression of the enzyme reveals that human brain β-secretase is a new membrane-bound aspartic proteinase.

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Authors and Affiliations

  1. Elan Pharmaceuticals, 800 Gateway Boulevard, South San Francisco, 94080, California, USA
    Sukanto Sinha, John P. Anderson, Robin Barbour, Guriqbal S. Basi, Russell Caccavello, David Davis, Minhtam Doan, Harry F. Dovey, Normand Frigon, Jin Hong, Kirsten Jacobson-Croak, Nancy Jewett, Pamela Keim, Jeroen Knops, Ivan Lieberburg, Michael Power, Hua Tan, Gwen Tatsuno, Jay Tung, Dale Schenk, Peter Seubert, Susanna M. Suomensaari, Shuwen Wang, Donald Walker, Jun Zhao, Lisa McConlogue & Varghese John

Authors

  1. Sukanto Sinha
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  2. John P. Anderson
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  3. Robin Barbour
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  4. Guriqbal S. Basi
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  5. Russell Caccavello
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  6. David Davis
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  7. Minhtam Doan
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  8. Harry F. Dovey
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  9. Normand Frigon
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  10. Jin Hong
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  11. Kirsten Jacobson-Croak
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  12. Nancy Jewett
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  13. Pamela Keim
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  14. Jeroen Knops
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  15. Ivan Lieberburg
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  16. Michael Power
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  17. Hua Tan
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  18. Gwen Tatsuno
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  19. Jay Tung
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  20. Dale Schenk
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  21. Peter Seubert
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  22. Susanna M. Suomensaari
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  23. Shuwen Wang
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  24. Donald Walker
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  25. Jun Zhao
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  26. Lisa McConlogue
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  27. Varghese John
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Corresponding author

Correspondence toSukanto Sinha.

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Sinha, S., Anderson, J., Barbour, R. et al. Purification and cloning of amyloid precursor protein β-secretase from human brain.Nature 402, 537–540 (1999). https://doi.org/10.1038/990114

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