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ER network homeostasis is critical for plant endosome streaming and endocytosis

Journal Article · · Cell Discovery
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [2]
  1. Michigan State University, East Lansing, MI (United States). MSU-DOE Plant Research Lab and Plant Biology Department; DOE/OSTI
  2. Michigan State University, East Lansing, MI (United States). MSU-DOE Plant Research Lab and Plant Biology Department
  3. University of Wisconsin-Madison, Madison, WI (United States). Dept. of Botany; University of Wisconsin-Madison, Madison, WI (United States). R.M. Bock Laboratories Cell and Molecular Biology
  4. University of Wisconsin-Madison, Madison, WI (United States). Dept. of Botany; University of Wisconsin-Madison, Madison, WI (United States). R.M. Bock Laboratories Cell and Molecular Biology; University of Wisconsin-Madison, Madison, WI (United States). Dept. of Genetics
Eukaryotic cells internalize cargo at the plasma membrane via endocytosis, a vital process that is accomplished through a complex network of endosomal organelles. In mammalian cells, the ER is in close association with endosomes and regulates their fission. Nonetheless, the physiological role of such interaction on endocytosis is yet unexplored. Here, we probed the existence of ER–endosome association in plant cells and assayed its physiological role in endocytosis. Through live-cell imaging and electron microscopy studies, we established that endosomes are extensively associated with the plant ER, supporting conservation of interaction between heterotypic organelles in evolutionarily distant kingdoms. Furthermore, by analyzing ER–endosome dynamics in genetic backgrounds with defects in ER structure and movement, we also established that the ER network integrity is necessary for homeostasis of the distribution and streaming of various endosome populations as well as for efficient endocytosis. These results support a novel model that endocytosis homeostasis depends on a spatiotemporal control of the endosome dynamics dictated by the ER membrane network.
Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-91ER20021
OSTI ID:
1623746
Journal Information:
Cell Discovery, Journal Name: Cell Discovery Journal Issue: 1 Vol. 1; ISSN 2056-5968
Publisher:
Nature Research (Springer Nature)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Atlastin-mediated membrane tethering is critical for cargo mobility and exit from the endoplasmic reticulum journal June 2019
Wortmannin-induced vacuole fusion enhances amyloplast dynamics in Arabidopsis zigzag1 hypocotyls journal November 2016
Plant ER-PM Contact Sites in Endocytosis and Autophagy: Does the Local Composition of Membrane Phospholipid Play a Role? journal January 2019
TGNap1 is required for microtubule-dependent homeostasis of a subpopulation of the plant trans-Golgi network journal December 2018
Salicylic acid-independent role of NPR1 is required for protection from proteotoxic stress in the plant endoplasmic reticulum journal May 2018
Drosophila Atlastin in motor neurons is required for locomotion and presynaptic function journal August 2017
NeurodegenERation: The Central Role for ER Contacts in Neuronal Function and Axonopathy, Lessons From Hereditary Spastic Paraplegias and Related Diseases journal October 2019

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