| Structural highlights
Disease
PEN2_HUMAN Hidradenitis suppurativa. The disease is caused by mutations affecting the gene represented in this entry.
Function
PEN2_HUMAN Essential subunit of the gamma-secretase complex, an endoprotease complex that catalyzes the intramembrane cleavage of integral membrane proteins such as Notch receptors and APP (beta-amyloid precursor protein). Probably represents the last step of maturation of gamma-secretase, facilitating endoproteolysis of presenilin and conferring gamma-secretase activity.[1] [2]
Publication Abstract from PubMed
Inhibition of gamma-secretase activity represents a potential therapeutic strategy for Alzheimer's disease (AD). MRK-560 is a selective inhibitor with higher potency for Presenilin 1 (PS1) than for PS2, the two isoforms of the catalytic subunit of gamma-secretase, although the underlying mechanism remains elusive. Here we report the cryo-electron microscopy (cryo-EM) structures of PS1 and PS2-containing gamma-secretase complexes with and without MRK-560 at overall resolutions of 2.9-3.4 A. MRK-560 occupies the substrate binding site of PS1, but is invisible in PS2. Structural comparison identifies Thr281 and Leu282 in PS1 to be the determinant for isoform-dependent sensitivity to MRK-560, which is confirmed by swapping experiment between PS1 and PS2. By revealing the mechanism for isoform-selective inhibition of presenilin, our work may facilitate future drug discovery targeting gamma-secretase.
Molecular basis for isoform-selective inhibition of presenilin-1 by MRK-560.,Guo X, Wang Y, Zhou J, Jin C, Wang J, Jia B, Jing D, Yan C, Lei J, Zhou R, Shi Y Nat Commun. 2022 Oct 22;13(1):6299. doi: 10.1038/s41467-022-33817-5. PMID:36272978[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Luo WJ, Wang H, Li H, Kim BS, Shah S, Lee HJ, Thinakaran G, Kim TW, Yu G, Xu H. PEN-2 and APH-1 coordinately regulate proteolytic processing of presenilin 1. J Biol Chem. 2003 Mar 7;278(10):7850-4. Epub 2003 Jan 8. PMID:12522139 doi:http://dx.doi.org/10.1074/jbc.C200648200
- ↑ Marlow L, Canet RM, Haugabook SJ, Hardy JA, Lahiri DK, Sambamurti K. APH1, PEN2, and Nicastrin increase Abeta levels and gamma-secretase activity. Biochem Biophys Res Commun. 2003 Jun 6;305(3):502-9. PMID:12763021
- ↑ Guo X, Wang Y, Zhou J, Jin C, Wang J, Jia B, Jing D, Yan C, Lei J, Zhou R, Shi Y. Molecular basis for isoform-selective inhibition of presenilin-1 by MRK-560. Nat Commun. 2022 Oct 22;13(1):6299. doi: 10.1038/s41467-022-33817-5. PMID:36272978 doi:http://dx.doi.org/10.1038/s41467-022-33817-5
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