Beta-amyloid induces apoptosis of neuronal cells by inhibition of the Arg/N-end rule pathway proteolytic activit

Date

2019

Authors

Kechko, Olga I.
Petrushanko, Irina Yu
Brower, Christopher S.
Adzhubei, Alexei A.
Moskalev, Alexey A.
Piatkov, Konstantin I.
Mitkevich, Vladimir A.
Makarov, Alexander A.

Journal Title

Journal ISSN

Volume Title

Publisher

Impact Journals

Abstract

Alzheimer’s disease (AD) is accompanied by the dysfunction of intracellular protein homeostasis systems, in particular the ubiquitin-proteasome system (UPS). Beta-amyloid peptide (Aβ), which is involved in the processes of neurodegeneration in AD, is a substrate of this system, however its effect on UPS activity is still poorly explored. Here we found that Aβ peptides inhibited the proteolytic activity of the antiapoptotic Arg/Nend rule pathway that is a part of UPS. We identified arginyltransferase Ate1 as a specific component of the Arg/N-end rule pathway targeted by Aβs. Aβ bearing the familial English H6R mutation, known to cause earlyonset AD, had an even greater inhibitory effect on protein degradation through the Arg/N-end rule pathway than intact Aβ. This effect was associated with a significant decrease in Ate1-1 and Ate1-3 catalytic activity. We also found that the loss of Ate1 in neuroblastoma Neuro-2a cells eliminated the apoptosis-inducing effects of Aβ peptides. Together, our results show that the apoptotic effect of Aβ peptides is linked to their impairment of Ate1 catalytic activity leading to suppression of the Arg/N-end rule pathway proteolytic activity and ultimately cell death.

Description

Article originally published by Aging, 11(16). English. Published online 2019. https://doi.org/10.18632/aging.102177.

Keywords

Age-related disease, Alzheimer’s disease, Apoptosis, Ate1, Protein degradation

Citation

This is the published version of an article that is available at https://doi.org/10.18632/aging.102177. Recommended citation: Kechko, O. I., Petrushanko, I. Y., Brower, C. S., Adzhubei, A. A., Moskalev, A. A., Piatkov, K. I., Mitkevich, V. A., & Makarov, A. A. (2019). Beta-amyloid induces apoptosis of neuronal cells by inhibition of the ARG/n-end rule pathway proteolytic activity. Aging, 11(16), 6134–6152. This item has been deposited in accordance with publisher copyright and licensing terms and with the author’s permission.

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