Related Experiment Video
Updated: Mar 19, 2026
06:59
A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis
Published on: August 11, 2010
12.5K
COPII Paralogs in Plants: Functional Redundancy or Diversity?
Kin Pan Chung1, Yonglun Zeng1, Liwen Jiang1
1Centre 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.
Trends in Plant Science
|June 19, 2016
Summary
Plant cells use coat protein complex II (COPII) vesicles for endoplasmic reticulum (ER) export. This study explores the diverse functions of COPII subunit isoforms in Arabidopsis, revealing distinct vesicle populations for unique cellular pathways.
Area of Science:
- Plant cell biology
- Molecular and cellular biology
- Protein trafficking
Background:
- Endoplasmic reticulum (ER) export in eukaryotes is primarily mediated by coat protein complex II (COPII) vesicles.
- COPII vesicles consist of five conserved cytosolic components: secretion-associated, Ras-related protein 1 (Sar1), Sec23-24, and Sec13-31.
- Higher organisms possess multiple paralogs of COPII components due to gene duplication, but their functional diversity in plants is not well understood.
Purpose of the Study:
- To summarize and discuss recent findings on the functional diversity of Arabidopsis COPII subunit isoforms.
- To investigate the distinct roles of various COPII subunit isoforms in plant cellular processes.
- To propose testable hypotheses regarding specialized COPII vesicle populations in ER export.
Main Methods:
- Literature review and synthesis of existing research on Arabidopsis COPII components.
- Analysis of functional data related to different COPII subunit isoforms.
- Formulation of hypotheses based on current understanding of COPII vesicle function.
Main Results:
- Multiple paralogs of COPII components exist in Arabidopsis, suggesting functional specialization.
- Studies indicate that different Arabidopsis COPII subunit isoforms may mediate distinct ER export pathways.
- Evidence points towards specialized COPII vesicle populations involved in specific developmental and stress responses.
Conclusions:
- The functional diversity of plant COPII subunit isoforms is crucial for regulating ER export.
- Distinct COPII vesicle populations likely perform unique functions in plant development and stress adaptation.
- Further research is needed to elucidate the precise roles and mechanisms of these specialized COPII vesicles.
Related Concept Videos
01:57Gene Families
10.2K
Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
10.2K
02:37Gene Duplication and Divergence
8.2K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
8.2K
02:18Alternative RNA Splicing
26.1K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
26.1K
01:31Formation of Species
46.6K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
46.6K
02:22Introduction to Plant Diversity
50.1K
From Water to Land
50.1K
01:57Protein Complexes with Interchangeable Parts
3.0K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
3.0K