GO:0031410 cytoplasmic vesicle: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0031410 cytoplasmic vesicle is a cellular_component term defined as a vesicle found in the cytoplasm of a cell.
• Cytoplasmic vesicles include diverse carriers such as transport vesicles, secretory vesicles, endosomes, autophagosomes, and bacterial membrane vesicles.
• Vesicle trafficking depends on conserved machinery including SNAREs, coat proteins, and Rab GTPases that mediate budding, targeting, and fusion.
• Dysregulated cytoplasmic vesicle traffic contributes to neurodegeneration, cancer, and infection, including synucleinopathies and coronavirus replication.
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal testing of vesicle-related genes.
• Key methods to study cytoplasmic vesicles include live-cell imaging, proteomics, and CRISPR library screening.
Description
Cytoplasmic vesicles are membrane-bounded compartments that carry cargo within the cytoplasm of cells. They are fundamental to intracellular transport, secretion, endocytosis, and autophagy, and they are conserved across eukaryotes and prokaryotes. The Gene Ontology term GO:0031410 (cytoplasmic vesicle) captures this broad class of organelles and is widely used to annotate gene products involved in vesicle biology. Understanding cytoplasmic vesicles is essential because defects in their formation, trafficking, or fusion underlie many human diseases, including neurodegeneration and cancer. Moreover, pathogens such as coronaviruses hijack vesicle membranes to build replication organelles. Researchers studying these processes need reliable models and methods to dissect vesicle components and their functions.
cytoplasmic vesicle At A Glance
| GO ID | GO:0031410 |
|---|---|
| GO term | cytoplasmic vesicle |
| Ontology | cellular_component |
| Synonym | cytoplasmic membrane bounded vesicle; cytoplasmic, membrane-bounded vesicle; cytoplasmic membrane-enclosed vesicle |
| Definition | A vesicle found in the cytoplasm of a cell. |
| Major function | Intracellular transport, secretion, endocytosis, autophagy, and cargo sorting |
| Related processes | Vesicle trafficking, membrane fusion, autophagy, and bacterial vesicle formation |
| Key machinery | SNAREs, coat proteins, Rab GTPases, and ESCRT components |
| Disease relevance | Neurodegeneration, cancer, and infectious diseases |
What Is GO:0031410?
GO:0031410 cytoplasmic vesicle is defined by the Gene Ontology as a vesicle found in the cytoplasm of a cell. In other words, it is any small, membrane-enclosed sac located within the cytoplasm, excluding those enclosed by a double membrane such as the nucleus or mitochondria. This term encompasses a wide range of vesicles, including transport vesicles, secretory vesicles, endosomes, lysosomes, autophagosomes, and bacterial outer membrane vesicles.
Why Is cytoplasmic vesicle Important in Cell Biology?
Cytoplasmic vesicles are central to nearly every aspect of cell biology, from nutrient uptake to neurotransmitter release and immune signaling. Their dysfunction is linked to a growing list of human disorders, including synucleinopathies, cancer, and viral infections. Because vesicles are dynamic and heterogeneous, understanding their molecular composition and regulation requires sophisticated genetic and imaging tools.
• Cytoplasmic vesicles mediate intracellular transport and secretion of proteins and lipids.
• They are essential for autophagy and lysosomal degradation pathways.
• Vesicle trafficking regulates synaptic transmission and neuronal survival.
• Bacterial membrane vesicles play roles in pathogenesis and intercellular communication.
• Chloroplast vesicle transport is critical for plant development and stress responses.
• Coronaviruses remodel cytoplasmic membranes to form replication organelles.
• Dysregulated vesicle traffic contributes to cancer progression and metastasis.
• SNARE proteins ensure specificity of vesicle fusion with target membranes.
• Vesicle pathways are targets for therapeutic intervention in neurodegeneration.
• CRISPR screening can identify novel regulators of vesicle trafficking.
What Happens During cytoplasmic vesicle?
Vesicle Budding and Cargo Selection
In simple terms: A small bubble forms from a membrane and grabs specific cargo to carry.
Vesicle formation begins with the recruitment of coat proteins (e.g., COPI, COPII, clathrin) to a donor membrane, which deform the lipid bilayer and select cargo through sorting signals. This process is regulated by small GTPases such as Sar1 and ARF1. In autophagy, the phagophore expands to engulf cytoplasmic material, forming an autophagosome, a type of cytoplasmic vesicle.
Vesicle Transport and Tethering
In simple terms: The bubble travels along tracks and is tied to the correct destination.
After budding, vesicles are transported along cytoskeletal tracks (microtubules or actin) by motor proteins. Tethering factors and Rab GTPases mediate the initial contact between the vesicle and target membrane, ensuring specificity. This step is crucial for delivering cargo to the correct organelle.
Membrane Fusion and Cargo Release
In simple terms: The bubble merges with the target membrane and releases its contents.
Fusion is driven by SNARE proteins, which form a four-helix bundle that pulls the two membranes together. Accessory proteins such as SM proteins and synaptotagmin regulate the speed and calcium sensitivity of fusion. After fusion, cargo is released into the lumen or membrane of the target compartment.
Vesicle Recycling and Degradation
In simple terms: Used vesicles are either reused or broken down.
Membrane components can be recycled back to donor compartments via retrograde transport. Alternatively, vesicles can be targeted to lysosomes for degradation through microautophagy or other pathways. Defects in recycling lead to accumulation of vesicles and impaired cellular function.
Key Genes Involved in GO:0031410 cytoplasmic vesicle
The following genes encode proteins with well-established roles in cytoplasmic vesicle biology, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SNARE proteins (e.g., VAMP2, SNAP25, STX1A) | Mediate membrane fusion | Core machinery for vesicle fusion; targets for neurotoxins |
| RAB GTPases (e.g., RAB5, RAB7, RAB11) | Regulate vesicle tethering and motility | Markers of endosomal compartments; frequently mutated in disease |
| COPI/COPII coat proteins (e.g., SEC23A, COPA) | Vesicle budding from ER/Golgi | Cargo selection and transport; mutations cause congenital disorders |
| Clathrin (CLTC) | Endocytosis and vesicle formation | Key player in receptor-mediated endocytosis |
| ATG proteins (e.g., ATG5, ATG7, LC3) | Autophagosome formation | Essential for autophagy; linked to neurodegeneration and cancer |
| ESCRT components (e.g., TSG101, CHMP4B) | Multivesicular body sorting | Vesicle scission and cargo sorting; involved in viral budding |
| Synuclein alpha (SNCA) | Synaptic vesicle trafficking | Aggregates in Parkinson's disease; regulates vesicle dynamics |
| LRRK2 | Vesicle trafficking and autophagy | Mutations cause Parkinson's disease; regulates vesicle transport |
| VPS35 | Retromer-mediated recycling | Mutations linked to Parkinson's disease; controls vesicle recycling |
| Bacterial membrane vesicle proteins (e.g., OmpA) | Outer membrane vesicle formation | Roles in pathogenesis and host interaction |
| Chloroplast vesicle proteins (e.g., VIPP1) | Thylakoid membrane biogenesis | Plant-specific vesicle transport |
| Coronavirus nsp3/nsp4 | Replication organelle formation | Induce double-membrane vesicles for viral replication |
| Microautophagy-related proteins (e.g., Vps27) | Direct uptake into vacuole/lysosome | Lesser-known self-eating pathway |
| Rab7 | Late endosome/lysosome fusion | Regulates degradation; implicated in neuropathy |
| Syntaxin 17 | Autophagosome-lysosome fusion | Essential for autophagic flux |
| Sec22b | ER-Golgi and autophagosome trafficking | Regulates vesicle fusion in autophagy |
| VAMP7 | Lysosomal fusion | Mediates vesicle fusion with lysosomes |
| Dynamin (DNM1) | Vesicle scission | Required for endocytosis and vesicle release |
How Is cytoplasmic vesicle Regulated?
Cytoplasmic vesicle trafficking is regulated by a complex network of signaling pathways. Small GTPases of the Rab and Arf families act as molecular switches that cycle between active GTP-bound and inactive GDP-bound states, controlling vesicle budding, motility, and tethering. Phosphoinositides and lipid-modifying enzymes regulate membrane identity and recruitment of effector proteins. In autophagy, the ULK1 complex and mTORC1 signaling integrate nutrient status to control autophagosome formation. Calcium signaling triggers rapid fusion of synaptic vesicles through synaptotagmin. Additionally, post-translational modifications such as phosphorylation and ubiquitination modulate the activity of vesicle trafficking proteins.
cytoplasmic vesicle and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SNCA | Parkinson's disease | Knockout or A53T knock-in in neurons |
| LRRK2 | Parkinson's disease | G2019S knock-in mouse or iPSC-derived neurons |
| VPS35 | Parkinson's disease | D620N knock-in cell lines |
| COPA | Autoimmune interstitial lung disease | Knockout or point-mutation in epithelial cells |
| CHMP4B | Cataract and neurodegeneration | Knockout in lens or neuronal cells |
Neurodegeneration and Synucleinopathies
Disrupted vesicle trafficking is a hallmark of synucleinopathies, including Parkinson's disease and dementia with Lewy bodies. Alpha-synuclein (SNCA) aggregates impair synaptic vesicle function, while mutations in LRRK2 and VPS35 alter endosomal recycling and autophagy. These defects lead to accumulation of toxic protein aggregates and neuronal death.
Cancer
Cancer cells exploit vesicle trafficking to promote proliferation, invasion, and immune evasion. Altered expression of Rab GTPases and SNAREs correlates with tumor progression and metastasis. Extracellular vesicles released by tumor cells can reprogram the tumor microenvironment.
Infectious Diseases
Many pathogens hijack cytoplasmic vesicles for entry, replication, and immune escape. Coronaviruses induce double-membrane vesicles as replication organelles, a process dependent on nsp3 and nsp4. Bacterial membrane vesicles deliver virulence factors to host cells.
Genetic Disorders of Vesicle Trafficking
Mutations in genes encoding coat proteins, SNAREs, or ESCRT components cause rare congenital disorders. For example, mutations in COPA cause autoimmune interstitial lung disease, and defects in ESCRT-III lead to neurodegeneration. These disorders highlight the importance of vesicle trafficking in human health.
From cytoplasmic vesicle-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate vesicle trafficking? | CRISPR knockout in HeLa or HEK293T cells followed by imaging |
| Does a disease-associated mutation alter vesicle fusion? | Point-mutation knock-in (e.g., SNCA A53T) |
| Where does a vesicle protein localize? | Knock-in of fluorescent tag (e.g., GFP) |
| Does overexpression of gene Y increase vesicle secretion? | Doxycycline-inducible overexpression |
| Which genes are essential for autophagy? | Genome-wide CRISPR library screening |
| How does a pathogen remodel host vesicles? | Infection model with coronavirus and knockout cells |
How to Study the cytoplasmic vesicle Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell fluorescence microscopy | Vesicle dynamics and localization | Tracking vesicle movement and fusion |
| Proteomics | Protein composition of vesicles | Identifying novel vesicle cargo |
| CRISPR knockout screening | Genes required for vesicle trafficking | Discovering regulators of autophagy |
| Electron microscopy | Ultrastructure of vesicles | Visualizing double-membrane vesicles |
| Proximity labeling (BioID) | Protein-protein interactions | Mapping vesicle interactome |
| FRAP | Vesicle turnover and mobility | Measuring vesicle recycling |
| RNA-seq | Transcriptional changes in vesicle genes | Profiling disease models |
| Super-resolution microscopy | Nanoscale organization of vesicle proteins | Studying SNARE clustering |
Live-Cell Imaging
Fluorescence microscopy of GFP- or RFP-tagged vesicle markers allows real-time visualization of vesicle dynamics, including budding, transport, and fusion. Total internal reflection fluorescence (TIRF) microscopy is particularly useful for studying synaptic vesicle fusion at the plasma membrane.
Proteomics
Mass spectrometry-based proteomics of isolated vesicles can identify their protein composition and post-translational modifications. Proximity labeling (e.g., BioID) can map the interactome of vesicle-associated proteins in living cells.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that regulate vesicle trafficking, autophagy, or secretion. These screens are powerful for discovering novel components of cytoplasmic vesicle pathways.
Electron Microscopy
Electron microscopy (EM) and cryo-electron tomography provide ultrastructural details of vesicles, including double-membrane vesicles induced by coronaviruses. Correlative light and electron microscopy (CLEM) links dynamic behavior to ultrastructure.
How CRISPR Can Be Used to Study GO:0031410 cytoplasmic vesicle
Knockout
CRISPR knockout of vesicle-related genes (e.g., SNARE proteins, Rab GTPases) can abolish specific trafficking steps, revealing their essential functions. For example, knockout of ATG5 blocks autophagosome formation, leading to accumulation of cytoplasmic vesicles.
Point Mutation
Introducing disease-associated point mutations (e.g., SNCA A53T, LRRK2 G2019S) via CRISPR base editing or HDR allows study of how these mutations affect vesicle dynamics and neurodegeneration.
Knock-in
Knock-in of fluorescent tags (e.g., GFP, mCherry) into endogenous vesicle protein loci enables real-time imaging of vesicle trafficking under physiological expression levels. Knock-in of epitope tags facilitates proteomic analysis.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can increase levels of vesicle proteins to test gain-of-function effects on secretion, autophagy, or viral replication.
How EDITGENE Supports cytoplasmic vesicle Research
Researchers studying cytoplasmic vesicle-related genes often need to determine whether a candidate gene is causally involved in vesicle trafficking, fusion, or cargo sorting. EDITGENE provides a comprehensive suite of CRISPR services to generate precisely engineered cell models, enabling rigorous functional studies of GO:0031410-associated genes.
Contact EDITGENE today to design your custom CRISPR model for cytoplasmic vesicle research.
Frequently Asked Questions About cytoplasmic vesicle
What is GO:0031410 cytoplasmic vesicle?
GO:0031410 is a Gene Ontology cellular_component term defined as a vesicle found in the cytoplasm of a cell. It includes transport vesicles, secretory vesicles, endosomes, autophagosomes, and other membrane-bounded carriers.
What genes are involved in cytoplasmic vesicle trafficking?
Key genes include SNAREs (e.g., VAMP2, SNAP25), Rab GTPases (e.g., RAB5, RAB7), coat proteins (e.g., COPI, COPII, clathrin), and autophagy-related genes (e.g., ATG5, ATG7).
How are cytoplasmic vesicles formed?
They form through budding from donor membranes, driven by coat proteins and small GTPases, followed by cargo selection and scission.
What is the role of cytoplasmic vesicles in disease?
Dysfunctional vesicle trafficking is linked to neurodegeneration (e.g., Parkinson's disease), cancer, and infectious diseases.
What methods are used to study cytoplasmic vesicles?
Common methods include live-cell imaging, proteomics, electron microscopy, and CRISPR screening.
Can CRISPR be used to study vesicle trafficking?
Yes, CRISPR knockout, knock-in, and overexpression models are widely used to dissect gene function in vesicle trafficking.
What is the difference between cytoplasmic vesicle and extracellular vesicle?
Cytoplasmic vesicles are located inside the cell, while extracellular vesicles are released into the extracellular space.
Which organelles are considered cytoplasmic vesicles?
Endosomes, lysosomes, autophagosomes, synaptic vesicles, and transport vesicles are all examples of cytoplasmic vesicles.
How does autophagy relate to cytoplasmic vesicles?
Autophagy involves the formation of autophagosomes, which are double-membrane cytoplasmic vesicles that deliver cargo to lysosomes for degradation.
What is the role of SNAREs in vesicle fusion?
SNAREs mediate membrane fusion by forming a four-helix bundle that brings vesicle and target membranes together.
Conclusion
Cytoplasmic vesicles (GO:0031410) are fundamental to intracellular transport, secretion, and degradation, and their dysfunction is implicated in a wide range of human diseases. Understanding their molecular machinery and regulation requires integrated approaches, including CRISPR-based genetic models and advanced imaging. EDITGENE provides end-to-end CRISPR services to help researchers uncover the roles of vesicle-related genes in health and disease.
References
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- 2. Lindquist E et al.. 2018. Chloroplast vesicle transport.. Photosynth Res 138(3):361-371 PMID: 30117121
- 3. Huber LA. 2021. Presenting the FEBS Letters virtual issue on vesicle biology.. FEBS Lett 595(24):2978-2980 PMID: 34783009
- 4. Fanning S et al.. 2021. Vesicle trafficking and lipid metabolism in synucleinopathy.. Acta Neuropathol 141(4):491-510 PMID: 32607605
- 5. Wolff G et al.. 2020. A molecular pore spans the double membrane of the coronavirus replication organelle.. Science 369(6509):1395-1398 PMID: 32763915
- 6. Li WW et al.. 2012. Microautophagy: lesser-known self-eating.. Cell Mol Life Sci 69(7):1125-36 PMID: 22080117
- 7. Ge L et al.. 2014. The protein-vesicle network of autophagy.. Curr Opin Cell Biol 29:18-24 PMID: 24681112
- 8. Hong W. 2005. SNAREs and traffic.. Biochim Biophys Acta 1744(2):120-44 PMID: 15893389
