ArticlePlant signaling & behavior2012
Genetic analyses of the Arabidopsis 26S proteasome regulatory particle reveal its importance during light stress and a specific role for the N-terminus of RPT2 in development.
Article in Plant signaling & behavior, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 4 citations in OpenAlex.
- Proteasome inhibition rapidly exacerbates photoinhibition and impedes recovery during high light stress in Chlamydomonas reinhardtii.BMC plant biology · 2020Article
- Comparative proteomic analysis ofProteome science · 2018Article
- TOPORS, a Dual E3 Ubiquitin and Sumo1 Ligase, Interacts with 26 S Protease Regulatory Subunit 4, Encoded by the PSMC1 Gene.PloS one · 2016Article
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Authors and funding
4 authors at 2 institutions in 1 country.
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Abstract
The 26S proteasome subunit RPT2 is a component of the hexameric ring of AAA-ATPases that forms the base of the 19S regulatory particle (RP). This subunit has specific roles in the yeast and mammalian proteasomes by helping promote assembly of the RP with the 20S core protease (CP) and gate the CP to prevent indiscriminate degradation of cytosolic and nuclear proteins. In plants, this subunit plays an important role in diverse processes that include shoot and root apical meristem maintenance, cell size regulation, trichome branching, and stress responses. Recently, we reported that mutants in RPT2 and several other RP subunits have reduced histone levels, suggesting that at least some of the pleiotropic phenotypes observed in these plants result from aberrant nucleosome assembly. Here, we expand our genetic analysis of RPT2 in Arabidopsis to shed additional light on the roles of the N- and C-terminal ends. We also present data showing that plants bearing mutations in RP subunit genes have their seedling phenotypes exacerbated by prolonged light exposure.
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