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The RING Finger Ubiquitin E3 Ligase SDIR1 Targets SDIR1-INTERACTING PROTEIN1 for Degradation to Modulate the Salt Stress Response and ABA Signaling in Arabidopsis
Open accessAbstract
The plant hormone abscisic acid (ABA) regulates many aspects of plant development and the stress response. The intracellular E3 ligase SDIR1 (SALT- AND DROUGHT-INDUCED REALLY INTERESTING NEW GENE FINGER1) plays a key role in ABA signaling, regulating ABA-related seed germination and the stress response. In this study, we found that SDIR1 is localized on the endoplasmic reticulum membrane in Arabidopsis thaliana. Using cell biology, molecular biology, and biochemistry approaches, we demonstrated that SDIR1 interacts with and ubiquitinates its substrate, SDIRIP1 (SDIR1-INTERACTING PROTEIN1), to modulate SDIRIP1 stability through the 26S proteasome pathway. SDIRIP1 acts genetically downstream of SDIR1 in ABA and salt stress signaling. In detail, SDIRIP1 selectively regulates the expression of the downstream basic region/leucine zipper motif transcription factor gene ABA-INSENSITIVE5, rather than ABA-RESPONSIVE ELEMENTS BINDING FACTOR3 (ABF3) or ABF4, to regulate ABA-mediated seed germination and the plant salt response. Overall, the SDIR1/SDIRIP1 complex plays a vital role in ABA signaling through the ubiquitination pathway.
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Cites
Jasmonate perception by inositol-phosphate-potentiated COI1–JAZ co-receptor
Sheard, L. B., Tan, X., Mao, H., Withers, J., Ben-Nissan, G., Hinds, T. R., Kobayashi, Y., Hsu, F.-F., Sharon, M., Browse, J., et al. (2010) · Nature · doi:10.1038/nature09430 · Cited by 1,497
Plant Development Is Regulated by a Family of Auxin Receptor F Box Proteins
Dharmasiri, N., Dharmasiri, S., Weijers, D., Lechner, E., Yamada, M., Hobbie, L., Ehrismann, J. S., Jürgens, G., & Estelle, M. (2005) · Developmental Cell · doi:10.1016/j.devcel.2005.05.014 · Cited by 997
Cited by
E3 Ubiquitin Ligases: Ubiquitous Actors in Plant Development and Abiotic Stress Responses
Shu, K., & Yang, W. (2017) · Plant and Cell Physiology · doi:10.1093/pcp/pcx071 · Cited by 322
Self-citationThe ubiquitin‐proteasome system in plant responses to environments
Xu, F., & Xue, H. (2019) · Plant, Cell & Environment · doi:10.1111/pce.13633 · Cited by 308
Metadata
- Authors
- Zhang, H., Cui, F., Wu, Y., Lou, L., Liu, L., Tian, M., Ning, Y., Shu, K., Tang, S., & Xie, Q.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2015-01-01
- Volume
- 27
- Issue
- 1
- Pages
- 214-227
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2033497748
- Cited by
- 185
- References
- 2
- FWCI
- 18.52
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: The RING Finger Ubiquitin E3 Ligase SDIR1 Targets SDIR1-INTERACTING PROTEIN1 for Degradation to Modulate the Salt Stress Response and ABA Signaling in Arabidopsis. https://app.cochat.ai/papers/10.1105/tpc.114.134163
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- Zhang, H., Cui, F., Wu, Y., Lou, L., Liu, L., Tian, M., Ning, Y., Shu, K., Tang, S., & Xie, Q. (2015). The RING Finger Ubiquitin E3 Ligase SDIR1 Targets SDIR1-INTERACTING PROTEIN1 for Degradation to Modulate the Salt Stress Response and ABA Signaling in Arabidopsis. The Plant Cell. https://doi.org/10.1105/tpc.114.134163
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