Arabidopsis metacaspase MC1 localizes in stress granules, clears protein aggregates and delays senescence

Ruiz-Solaní, Nerea (avtor), Van Midden, Katarina Petra (avtor), Klemenčič, Marina (avtor), S. Coll, Nuria (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: stress granules, biomolecular condensates, protein aggregates, metacaspases, heat stress, senescence
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: Str. 3325–3344
• Številčenje: Vol. 35, iss. 9
• PID: 20.500.12556/RUL-152407
• UDK: 577.15
• ISSN pri članku: 1040-4651
• DOI: 10.1093/plcell/koad172
• COBISS.SI-ID: 157990915
• Datum objave v RUL: 23.11.2023

Gradivo je del revije

• Naslov: The Plant cell
• Skrajšan naslov: Plant cell
• Založnik: Oxford University Press, American Society of Plant Biologists
• ISSN: 1040-4651
• COBISS.SI-ID: 28940033

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: stresne granule, biomolekularni kondenzati, proteinski agregati, metakaspaze, toplotni stres, staranje