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Trends Plant Sci. 2016 Sep;21(9):758-769. doi: 10.1016/j.tplants.2016.05.010. Epub 2016 Jun 14.

COPII Paralogs in Plants: Functional Redundancy or Diversity?

Author information

1
Centre for Cell and Developmental Biology and State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
2
Centre for Cell and Developmental Biology and State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China. Electronic address: ljiang@cuhk.edu.hk.

Abstract

In eukaryotes, the best-described mechanism of endoplasmic reticulum (ER) export is mediated by coat protein complex II (COPII) vesicles, which comprise five conserved cytosolic components [secretion-associated, Ras-related protein 1 (Sar1), Sec23-24, and Sec13-31]. In higher organisms, multiple paralogs of COPII components are created due to gene duplication. However, the functional diversity of plant COPII subunit isoforms remains largely elusive. Here we summarize and discuss the latest findings derived from studies of various arabidopsis COPII subunit isoforms and their functional diversity. We also put forward testable hypotheses on distinct populations of COPII vesicles performing unique functions in ER export in developmental and stress-related pathways in plants.

KEYWORDS:

ER export; arabidopsis; coat protein complex II; functional diversity.

PMID:
27317568
DOI:
10.1016/j.tplants.2016.05.010
[Indexed for MEDLINE]

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