A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes

The degradation of most intracellular proteins is a dynamic and tightly regulated process performed by proteasomes. To date, different forms of proteasomes have been identified. Currently the role of non-constitutive proteasomes (immunoproteasomes (iPs) and intermediate proteasomes (intPs)) has attr...

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Autores principales: Alexander Burov, Sergei Funikov, Elmira Vagapova, Alexandra Dalina, Alexander Rezvykh, Elena Shyrokova, Timofey Lebedev, Ekaterina Grigorieva, Vladimir Popenko, Olga Leonova, Daria Spasskaya, Pavel Spirin, Vladimir Prassolov, Vadim Karpov, Alexey Morozov
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spelling oai:doaj.org-article:19082ea56f0d4d82a9b1d7c06365760f2021-11-25T17:10:49ZA Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes10.3390/cells101130492073-4409https://doaj.org/article/19082ea56f0d4d82a9b1d7c06365760f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4409/10/11/3049https://doaj.org/toc/2073-4409The degradation of most intracellular proteins is a dynamic and tightly regulated process performed by proteasomes. To date, different forms of proteasomes have been identified. Currently the role of non-constitutive proteasomes (immunoproteasomes (iPs) and intermediate proteasomes (intPs)) has attracted special attention. Here, using a CRISPR-Cas9 nickase technology, four cell lines: histiocytic lymphoma, colorectal adenocarcinoma, cervix adenocarcinoma, and hepatocarcinoma were modified to express proteasomes with mCherry-tagged β5i subunit, which is a catalytic subunit of iPs and intPs. Importantly, the expression of the chimeric gene in modified cells is under the control of endogenous regulatory mechanisms and is increased following IFN-γ and/or TNF-α stimulation. Fluorescent proteasomes retain catalytic activity and are distributed within the nucleus and cytoplasm. RNAseq reveals marginal differences in gene expression profiles between the modified and wild-type cell lines. Predominant metabolic pathways and patterns of expressed receptors were identified for each cell line. Using established cell lines, we demonstrated that anti-cancer drugs Ruxolitinib, Vincristine and Gefitinib stimulated the expression of β5i-containing proteasomes, which might affect disease prognosis. Taken together, obtained cell lines can be used as a platform for real-time studies of immunoproteasome gene expression, localization of iPs and intPs, interaction of non-constitutive proteasomes with other proteins, proteasome trafficking and many other aspects of proteasome biology in living cells. Moreover, the established platform might be especially useful for fast and large-scale experiments intended to evaluate the effects of different conditions including treatment with various drugs and compounds on the proteasome pool.Alexander BurovSergei FunikovElmira VagapovaAlexandra DalinaAlexander RezvykhElena ShyrokovaTimofey LebedevEkaterina GrigorievaVladimir PopenkoOlga LeonovaDaria SpasskayaPavel SpirinVladimir PrassolovVadim KarpovAlexey MorozovMDPI AGarticleproteasomeimmunoproteasomeintermediate proteasomenon-constitutive proteasomereporter cell lineBiology (General)QH301-705.5ENCells, Vol 10, Iss 3049, p 3049 (2021)
institution DOAJ
collection DOAJ
language EN
topic proteasome
immunoproteasome
intermediate proteasome
non-constitutive proteasome
reporter cell line
Biology (General)
QH301-705.5
spellingShingle proteasome
immunoproteasome
intermediate proteasome
non-constitutive proteasome
reporter cell line
Biology (General)
QH301-705.5
Alexander Burov
Sergei Funikov
Elmira Vagapova
Alexandra Dalina
Alexander Rezvykh
Elena Shyrokova
Timofey Lebedev
Ekaterina Grigorieva
Vladimir Popenko
Olga Leonova
Daria Spasskaya
Pavel Spirin
Vladimir Prassolov
Vadim Karpov
Alexey Morozov
A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
description The degradation of most intracellular proteins is a dynamic and tightly regulated process performed by proteasomes. To date, different forms of proteasomes have been identified. Currently the role of non-constitutive proteasomes (immunoproteasomes (iPs) and intermediate proteasomes (intPs)) has attracted special attention. Here, using a CRISPR-Cas9 nickase technology, four cell lines: histiocytic lymphoma, colorectal adenocarcinoma, cervix adenocarcinoma, and hepatocarcinoma were modified to express proteasomes with mCherry-tagged β5i subunit, which is a catalytic subunit of iPs and intPs. Importantly, the expression of the chimeric gene in modified cells is under the control of endogenous regulatory mechanisms and is increased following IFN-γ and/or TNF-α stimulation. Fluorescent proteasomes retain catalytic activity and are distributed within the nucleus and cytoplasm. RNAseq reveals marginal differences in gene expression profiles between the modified and wild-type cell lines. Predominant metabolic pathways and patterns of expressed receptors were identified for each cell line. Using established cell lines, we demonstrated that anti-cancer drugs Ruxolitinib, Vincristine and Gefitinib stimulated the expression of β5i-containing proteasomes, which might affect disease prognosis. Taken together, obtained cell lines can be used as a platform for real-time studies of immunoproteasome gene expression, localization of iPs and intPs, interaction of non-constitutive proteasomes with other proteins, proteasome trafficking and many other aspects of proteasome biology in living cells. Moreover, the established platform might be especially useful for fast and large-scale experiments intended to evaluate the effects of different conditions including treatment with various drugs and compounds on the proteasome pool.
format article
author Alexander Burov
Sergei Funikov
Elmira Vagapova
Alexandra Dalina
Alexander Rezvykh
Elena Shyrokova
Timofey Lebedev
Ekaterina Grigorieva
Vladimir Popenko
Olga Leonova
Daria Spasskaya
Pavel Spirin
Vladimir Prassolov
Vadim Karpov
Alexey Morozov
author_facet Alexander Burov
Sergei Funikov
Elmira Vagapova
Alexandra Dalina
Alexander Rezvykh
Elena Shyrokova
Timofey Lebedev
Ekaterina Grigorieva
Vladimir Popenko
Olga Leonova
Daria Spasskaya
Pavel Spirin
Vladimir Prassolov
Vadim Karpov
Alexey Morozov
author_sort Alexander Burov
title A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
title_short A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
title_full A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
title_fullStr A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
title_full_unstemmed A Cell-Based Platform for the Investigation of Immunoproteasome Subunit β5i Expression and Biology of β5i-Containing Proteasomes
title_sort cell-based platform for the investigation of immunoproteasome subunit β5i expression and biology of β5i-containing proteasomes
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/19082ea56f0d4d82a9b1d7c06365760f
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