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Journal of Integrative Plant Biology >

2023 , Vol. 65 >Issue 8: 1846 - 1851

DOI: https://doi.org/10.1111/jipb.13493

Breakthrough Reports

Tyrosylprotein sulfotransferase suppresses ABA signaling via sulfation of SnRK2.2/2.3/2.6

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  • 1. State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian 271018, China;
    2. Department of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China
    †These authors contributed equally to this article.
    *Correspondence: Jinguang Huang (jghuang@sdau.edu.cn, Dr. Huang is fully responsible for the distributions of the materials associated with this article); Chengchao Zheng (cczheng@sdau.edu.cn)

Received date: 2022-12-13

  Accepted date: 2023-04-07

  Online published: 2023-04-13

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Abstract

Phytohormone abscisic acid (ABA) plays vital roles in stress tolerance, while long-term overactivation of ABA signaling suppresses plant growth and development. However, the braking mechanism of ABA responses is not clear. Protein tyrosine sulfation catalyzed by tyrosylprotein sulfotransferase (TPST) is a critical post-translational modification. Through genetic screening, we identified a tpst mutant in Arabidopsis that was hypersensitive to ABA. In-depth analysis revealed that TPST could interact with and sulfate SnRK2.2/2.3/2.6, which accelerated their degradation and weakened the ABA signaling. Taken together, these findings uncovered a novel mechanism of desensitizing ABA responses via protein sulfation.

Key words： Arabidopsis; ABA signaling; tyrosylprotein sulfotransferase; sulfation; SnRK2.2/2.3/2.6

Cite this article

Jun Wang, Chunyan Wang, Tianrun Wang, Shizhong Zhang, Kang Yan, Guodong Yang, Changai Wu, Chengchao Zheng and Jinguang Huang . Tyrosylprotein sulfotransferase suppresses ABA signaling via sulfation of SnRK2.2/2.3/2.6[J]. Journal of Integrative Plant Biology, 2023 , 65(8) : 1846 -1851 . DOI: 10.1111/jipb.13493

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