ArticleNature communications2023
Exo84c interacts with VAP27 to regulate exocytotic compartment degradation and stigma senescence.
Article in Nature communications, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 15 citations in OpenAlex.
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- A century journey of organelles research in the plant endomembrane system.The Plant cell · 2024Review
- Genome-Wide Association Study and Identification of Candidate Genes Associated with Seed Number per Pod in Soybean.International journal of molecular sciences · 2024Article
- Studying Autophagy and Senescence of Arabidopsis Stigmatic Cells.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Plant NETWORKED and VAP27 Proteins Work in Complexes to Regulate Membrane-Based Functions.Contact (Thousand Oaks (Ventura County, Calif.))Review
- Via Proteins and Lipids - Versatility of VAPs at Dynamic Membrane Contact Sites.Contact (Thousand Oaks (Ventura County, Calif.))Article
Corrections and comments
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Authors and funding
9 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In plants, exocyst subunit isoforms exhibit significant functional diversity in that they are involved in either protein secretion or autophagy, both of which are essential for plant development and survival. Although the molecular basis of autophagy is widely reported, its contribution to plant reproduction is not very clear. Here, we have identified Exo84c, a higher plant-specific Exo84 isoform, as having a unique function in modulating exocytotic compartment degradation during stigmatic tissue senescence. This process is achieved through its interaction with the ER localised VAP27 proteins, which regulate the turnover of Exo84c through the autophagy pathway. VAP27 recruits Exo84c onto the ER membrane as well as numerous ER-derived autophagosomes that are labelled with ATG8. These Exo84c/exocyst and VAP27 positive structures are accumulated in the vacuole for degradation, and this process is partially perturbed in the exo84c knock-out mutants. Interestingly, the exo84c mutant showed a prolonged effective pollination period with higher seed sets, possibly because of the delayed stigmatic senescence when Exo84c regulated autophagy is blocked. In conclusion, our studies reveal a link between the exocyst complex and the ER network in regulating the degradation of exocytosis vesicles, a process that is essential for normal papilla cell senescence and flower receptivity.
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