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Arabidopsis metacas...
Arabidopsis metacaspase MC1 localizes in stress granules, clears protein aggregates, and delays senescence
- Article/chapterEnglish2023
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LIBRIS-ID:oai:gup.ub.gu.se/329122
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https://gup.ub.gu.se/publication/329122URI
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https://doi.org/10.1093/plcell/koad172DOI
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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The Arabidopsis metacaspase MC1 is recruited to stress granules upon proteotoxic stress, participates in clearance of pathological protein aggregates, and delays senescence. Stress granules (SGs) are highly conserved cytoplasmic condensates that assemble in response to stress and contribute to maintaining protein homeostasis. These membraneless organelles are dynamic, disassembling once the stress is no longer present. Persistence of SGs due to mutations or chronic stress has been often related to age-dependent protein-misfolding diseases in animals. Here, we find that the metacaspase MC1 is dynamically recruited into SGs upon proteotoxic stress in Arabidopsis (Arabidopsis thaliana). Two predicted disordered regions, the prodomain and the 360 loop, mediate MC1 recruitment to and release from SGs. Importantly, we show that MC1 has the capacity to clear toxic protein aggregates in vivo and in vitro, acting as a disaggregase. Finally, we demonstrate that overexpressing MC1 delays senescence and this phenotype is dependent on the presence of the 360 loop and an intact catalytic domain. Together, our data indicate that MC1 regulates senescence through its recruitment into SGs and this function could potentially be linked to its remarkable protein aggregate-clearing activity.
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Salguero-Linares, J.
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Armengot, L.
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Santos, J.
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Pallares, I.
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van Midden, K. P.
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Phukkan, U. J.
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Koyuncu, S.
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Borras-Bisa, J.
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Li, L.
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Popa, C.
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Eisele, FrederikGothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Biomedicine, Department of Microbiology and Immunology
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Eisele-Bürger, Anna MariaGothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Biomedicine, Department of Microbiology and Immunology(Swepub:gu)xeisea
(author)
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Hill, Sandra Malmgren,1987Gothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Biomedicine, Department of Microbiology and Immunology(Swepub:gu)xmalms
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Gutierrez-Beltran, E.
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Nystrom, T.
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Valls, M.
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Llamas, E.
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Vilchez, D.
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Klemencic, M.
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Ventura, S.
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Coll, N. S.
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Göteborgs universitetInstitutionen för biomedicin, avdelningen för mikrobiologi och immunologi
(creator_code:org_t)
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In:Plant Cell35:9, s. 3325-33441040-4651
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Ruiz-Solani, N.
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Salguero-Linares ...
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Armengot, L.
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Santos, J.
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Pallares, I.
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van Midden, K. P ...
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Phukkan, U. J.
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Koyuncu, S.
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Borras-Bisa, J.
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Li, L.
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Popa, C.
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Eisele, Frederik
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Eisele-Bürger, A ...
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Hill, Sandra Mal ...
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Gutierrez-Beltra ...
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Nystrom, T.
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Valls, M.
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Llamas, E.
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Vilchez, D.
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Klemencic, M.
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Ventura, S.
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Coll, N. S.
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Plant Cell
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University of Gothenburg