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The complex world of plant protease inhibitors: Insights into a Kunitz-type cysteine protease inhibitor of Arabidopsis thaliana.


ABSTRACT: Plants have evolved an intricate regulatory network of proteases and corresponding protease inhibitors (PI), which operate in various biological pathways and serve diverse spatiotemporal functions during the sedentary life of a plant. Intricacy of the regulatory network can be anticipated from the observation that, depending on the developmental stage and environmental cue(s), either a single PI or multiple PIs regulate the activity of a given protease. On the other hand, the same PI often interacts with different targets at different places, necessitating another level of fine control to be added in planta. Here, it is reported on how the activity of a papain-like cysteine protease dubbed RD21 (RESPONSIVE TO DESICCATION 21) is differentially regulated by serpin and Kunitz PIs over plant development and how this mechanism contributes to defenses against herbivorous arthropods and microbial pests.

SUBMITTER: Rustgi S 

PROVIDER: S-EPMC5824933 | biostudies-literature |

REPOSITORIES: biostudies-literature

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