Regulatory plasticity of the 26S proteasome in plants

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ID: 332364
2026
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Abstract
Abstract The plant 26S proteasome is itself a regulatory target. Its abundance, composition, activity, and subcellular localisation are dynamically modulated by the very signalling pathways whose components or regulatory proteins it degrades. In this review, we draw on recent advances across immunity, abiotic stress, hormone signalling, organelle communication, and the proteasome's interplay with autophagy, together with the non-proteolytic functions of the 19S regulatory particle and apoplastic proteasomes, to establish the proteasome as a hub of regulatory plasticity. We argue that the proteasome operates not as a static degradation machine but as a proteolytic resource whose allocation across assembly states, subcellular compartments, and degradation pathways is continuously reconfigured. The central regulatory decision is therefore not which substrate is degraded, but how proteolytic capacity itself is distributed. This regulatory plasticity, and the nodes that mediate it, may inform the development of strategies to enhance proteolytic capacity for crop resilience.
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openalex_W7221810824 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wenxin Li, Xinyu Wang, Xiaomin Deng, Ningya Wang, Juan Mao, Linchuan Liu
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Journal Journal of experimental botany
Year 2026
DOI
10.1093/jxb/erag517
URL
https://doi.org/10.1093/jxb/erag517
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