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Cited by 357

The DOI matches its Crossref record; 79 of the 79 references it cites were found in a registry or an index.

EXPO, an Exocyst-Positive Organelle Distinct from Multivesicular Endosomes and Autophagosomes, Mediates Cytosol to Cell Wall Exocytosis in Arabidopsis and Tobacco Cells

Open access
Wang, Juan, Ding, Yu, Wang, Junqi, Hillmer, Stefan, Miao, Yansong, Lo, Sze Wan, Wang, Xiangfeng, Robinson, David G., Jiang, Liwen·2011·The Plant Cell

Abstract

The exocyst protein complex mediates vesicle fusion with the plasma membrane. By expressing an (X)FP-tagged Arabidopsis thaliana homolog of the exocyst protein Exo70 in suspension-cultured Arabidopsis and tobacco (Nicotiana tabacum) BY-2 cells, and using antibodies specific for Exo70, we detected a compartment, which we term EXPO (for exocyst positive organelles). Standard markers for the Golgi apparatus, the trans-Golgi network/early endosome, and the multivesicular body/late endosome in plants do not colocalize with EXPO. Inhibitors of the secretory and endocytic pathways also do not affect EXPO. Exo70E2-(X)FP also locates to the plasma membrane (PM) as discrete punctae and is secreted outside of the cells. Immunogold labeling of sections cut from high-pressure frozen samples reveal EXPO to be spherical double membrane structures resembling autophagosomes. However, unlike autophagosomes, EXPOs are not induced by starvation and do not fuse with the lytic compartment or with endosomes. Instead, they fuse with the PM, releasing a single membrane vesicle into the cell wall. EXPOs are also found in other cell types, including root tips, root hair cells, and pollen grains. EXPOs therefore represent a form of unconventional secretion unique to plants.

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Crossref · 10.1105/tpc.110.080697

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Metadata

Authors
Wang, J., Ding, Y., Wang, J., Hillmer, S., Miao, Y., Lo, S. W., Wang, X., Robinson, D. G., & Jiang, L.
Venue
The Plant Cell
Published
2010-12-01
Volume
22
Issue
12
Pages
4009-4030
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2160586137
Cited by
357
References
79
FWCI
5.06
Type
journal article
Language
en
Open access
green

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