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

doi:10.1111/jipb.13493

J Integr Plant Biol. ›› 2023, Vol. 65 ›› Issue (8): 1846-1851.DOI: 10.1111/jipb.13493

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

Jun Wang^1,2†, Chunyan Wang^1†, Tianrun Wang^1†, Shizhong Zhang¹, Kang Yan¹, Guodong Yang¹, Changai Wu¹, Chengchao Zheng^1* and Jinguang Huang^1*

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:2022-12-13 Accepted:2023-04-07 Online:2023-04-13 Published:2023-08-01

Abstract

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

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]. J Integr Plant Biol., 2023, 65(8): 1846-1851.

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

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