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De-ubiquitinases on the move: an emerging field in plant biology

Majumdar, P and Nath, U (2020) De-ubiquitinases on the move: an emerging field in plant biology. Blackwell Publishing Ltd.

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Abstract

A balance between the synthesis and degradation of active proteins governs diverse cellular processes in plants, spanning from cell-cycle progression and circadian rhythm to the outcome of several hormone signalling pathways. Ubiquitin-mediated post-translational modification determines the degradative fate of the target proteins, thereby altering the output of cellular processes. An equally important, and perhaps under-appreciated, aspect of this pathway is the antagonistic process of de-ubiquitination. De-ubiquitinases (DUBs), a group of processing enzymes, play an important role in maintaining cellular ubiquitin homeostasis by hydrolyzing ubiquitin poly-proteins and free poly-ubiquitin chains into mono-ubiquitin. Further, DUBs rescue the cellular proteins from 26S proteasome-mediated degradation to their active form by cleaving the poly-ubiquitin chain from the target protein. Any perturbation in DUB activity is likely to affect proteostasis and downstream cellular processes. This review illustrates recent findings on the biological significance and mechanisms of action of the DUBs in Arabidopsis thaliana, with an emphasis on ubiquitin-specific proteases (UBPs), the largest family among the DUBs. We focus on the putative roles of various protein�protein interaction interfaces in DUBs and their generalized function in ubiquitin recycling, along with their pre-eminent role in plant development. © 2020 German Society for Plant Sciences and The Royal Botanical Society of the Netherlands

Item Type: Other
Publication: Plant Biology
Publisher: Blackwell Publishing Ltd
Additional Information: Copyright of this article belongs to Blackwell Publishing Ltd
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 09 Apr 2021 07:52
Last Modified: 09 Apr 2021 07:52
URI: http://eprints.iisc.ac.in/id/eprint/65442

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