GO:0030136 clathrin-coated vesicle: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0030136 clathrin-coated vesicle is a cellular_component defined as a vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes.
• Clathrin-coated vesicle formation is a conserved process that drives clathrin-mediated endocytosis and intracellular transport in mammals, yeasts, and plants [1,2].
• Core components include clathrin heavy and light chains, adaptor protein complexes such as AP-2, and accessory proteins like CALM and RAB23 that regulate coat assembly and vesicle completion [1,6,7].
• Clathrin-coated vesicles are essential for nutrient uptake, receptor signaling, synaptic vesicle recycling, and plant immunity [1,3,5].
• Dysregulation of clathrin-coated vesicle components is linked to cancer, neurodegeneration, and immune disorders [1,7].
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of clathrin-coated vesicle gene function in health and disease [1,2].
Description
Clathrin-coated vesicles (CCVs) are membrane-bound carriers that mediate selective transport of cargo between cellular compartments. The Gene Ontology term GO:0030136 describes a vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes. This definition captures the defining architectural feature of CCVs: a polyhedral clathrin lattice linked to the donor membrane through adaptor proteins that also select cargo [1,8]. CCVs are central to clathrin-mediated endocytosis (CME), a process that internalizes nutrients, signaling receptors, and pathogens, and they also function in transport from the trans-Golgi network to endosomes [1,8]. Because of their fundamental roles, CCVs are studied across eukaryotes, from mammals to yeasts and plants, revealing both conserved and lineage-specific mechanisms. Researchers care about GO:0030136 because it represents a convergence point for cell biology, neurobiology, immunology, and disease research. Defects in CCV formation or cargo selection contribute to cancer progression, neurodegeneration, and immune dysfunction [1,7]. The term is also a hub for understanding how cells respond to membrane tension, signaling cues, and environmental stress [6,7]. In plants, CCV components participate in innate immunity and pathogen defense, underscoring the evolutionary breadth of this machinery [3,5]. This article provides a research-grade overview of GO:0030136, covering its definition, biological process, cellular components, molecular mechanisms, key genes, regulation, disease links, and experimental methods including CRISPR-based models. All statements are grounded in the verified literature cited by number.
clathrin-coated vesicle At A Glance
| GO ID | GO:0030136 |
|---|---|
| GO term | clathrin-coated vesicle |
| Ontology | cellular_component |
| Synonym | none |
| Definition | A vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes |
| Major function | Mediates selective cargo transport during clathrin-mediated endocytosis and intracellular trafficking [1,8] |
| Key components | Clathrin heavy chain, clathrin light chain, AP-2 adaptor complex, CALM, RAB23 [1,6,7] |
| Conservation | Present in mammals, yeasts, and plants with mechanistic divergences |
| Related process | Clathrin-mediated endocytosis, receptor internalization, synaptic vesicle recycling [1,8] |
What Is GO:0030136?
GO:0030136 clathrin-coated vesicle is a cellular_component term defined as a vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes. In other words, it is a membrane vesicle whose cytoplasmic surface is decorated by a clathrin lattice, and this lattice is anchored to the membrane through adaptor protein complexes such as AP-2 [1,8]. The term encompasses vesicles at various stages of formation, including nascent coated pits and completed CCVs, and is distinct from other coated vesicles that use different coat proteins.
Why Is clathrin-coated vesicle Important in Cell Biology?
GO:0030136 is important because clathrin-coated vesicles are fundamental to how eukaryotic cells communicate with their environment and organize intracellular transport. They control the uptake of nutrients and signaling receptors, regulate synaptic transmission, and participate in immune responses across kingdoms [1,3,5]. Dysregulation of CCV components is implicated in cancer, neurodegeneration, and immune disorders, making this term a focal point for both basic and translational research [1,7].
• CCVs mediate clathrin-mediated endocytosis, a major route for nutrient uptake and receptor signaling [1,8].
• They are essential for synaptic vesicle recycling and neurotransmitter release in neurons.
• CCV components regulate plant innate immunity and pathogen defense [3,5].
• Mutations in CCV genes are linked to cancer and neurodegenerative diseases [1,7].
• CCVs participate in intracellular sorting from the trans-Golgi network to endosomes [1,8].
• Membrane tension and signaling cues dynamically regulate CCV formation [6,7].
• CCVs are conserved across mammals, yeasts, and plants, enabling comparative studies.
• They provide a model system for studying protein-lipid interactions and coat assembly [1,4].
• CCV components are potential therapeutic targets for diseases of trafficking [1,7].
• CRISPR-based models allow precise dissection of CCV gene function [1,2].
Core Biology of GO:0030136 clathrin-coated vesicle
Initiation and cargo selection
In simple terms: The cell starts building a clathrin-coated vesicle by marking the membrane and gathering cargo.
Clathrin-coated vesicle formation begins with the recruitment of adaptor proteins such as AP-2 to the plasma membrane, where they interact with phospholipids and cargo proteins [1,8]. These adaptors select transmembrane cargo and initiate the assembly of a clathrin lattice on the cytoplasmic face of the membrane. The process is regulated by accessory proteins and signaling lipids, and it can be influenced by membrane tension. In plants, similar initiation steps occur but with lineage-specific components [2,3].
Clathrin coat assembly and vesicle budding
In simple terms: Clathrin molecules assemble into a basket-like coat that bends the membrane into a vesicle.
Clathrin triskelia, composed of heavy and light chains, polymerize into a polyhedral lattice that drives membrane curvature and vesicle budding [1,8]. Adaptor complexes connect the clathrin coat to the membrane and to cargo. Accessory proteins such as CALM support vesicle completion under conditions of increased membrane tension. RAB23 facilitates the formation of nascent CCVs at the plasma membrane and modulates cell signaling. The budding process is energetically driven by coat assembly and assisted by membrane-remodeling proteins.
Vesicle scission and uncoating
In simple terms: The vesicle pinches off from the membrane and then loses its clathrin coat.
After budding, the neck of the vesicle is severed by dynamin and other scission machinery, releasing a clathrin-coated vesicle into the cytoplasm [1,8]. The clathrin coat is subsequently removed by uncoating factors such as auxilin and Hsc70, allowing the vesicle to fuse with target membranes. This step is critical for recycling clathrin and adaptors for further rounds of transport. Regulation of uncoating is essential for proper cargo delivery.
Structure and composition of clathrin-coated vesicle
In simple terms: A clathrin-coated vesicle is made of a clathrin shell, adaptor proteins, and cargo.
The CCV consists of an outer clathrin lattice, an inner layer of adaptor complexes, and a membrane bilayer containing cargo proteins and lipids [1,8]. The clathrin heavy chain forms the structural backbone, while light chains regulate lattice assembly. AP-2 is the major adaptor at the plasma membrane, linking clathrin to cargo and membrane. Other components include CALM, which stabilizes the coat under tension, and RAB23, which promotes nascent vesicle formation [6,7]. In plants, additional CCV components such as OsSCYL2 regulate immunity.
Molecular mechanism and regulation
In simple terms: The molecular mechanism involves protein-protein and protein-lipid interactions that are tightly regulated.
The molecular mechanism of CCV formation relies on the coordinated action of clathrin, adaptors, and accessory proteins [1,4]. Phosphorylation and lipid modifications regulate the recruitment and activity of these components. Membrane tension is a key regulator, with CALM supporting vesicle completion when tension increases. RAB23 modulates signaling pathways that intersect with CCV formation. In plants, conserved CCV components like OsSCYL2 regulate innate immunity, indicating that molecular mechanisms are adapted to specific physiological contexts.
Key Genes Involved in GO:0030136 clathrin-coated vesicle
The following genes and proteins are core components or regulators of clathrin-coated vesicles (GO:0030136) and are frequently studied in cell biology and disease research.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CLTC | Clathrin heavy chain; forms the structural lattice of CCVs | Essential for all clathrin-mediated processes; mutations linked to cancer and neurodegeneration |
| CLTA | Clathrin light chain A; regulates lattice assembly and stability | Modulates coat dynamics; studied in endocytosis and synaptic function |
| CLTB | Clathrin light chain B; regulates lattice assembly and stability | Similar to CLTA; tissue-specific roles in transport |
| AP2A1 | AP-2 adaptor complex subunit alpha 1; links clathrin to cargo and membrane | Cargo selection; implicated in receptor internalization [1,8] |
| AP2B1 | AP-2 adaptor complex subunit beta 1; core adaptor component | Essential for CCV formation at plasma membrane |
| AP2M1 | AP-2 adaptor complex subunit mu 1; binds cargo sorting signals | Cargo recognition; disease-associated mutations |
| CALM1 | Calmodulin; supports CCV completion under membrane tension | Regulates vesicle scission under mechanical stress |
| RAB23 | Small GTPase; facilitates nascent CCV formation and signaling | Modulates cell signaling; linked to developmental disorders |
| OsSCYL2 | Plant SCY1-like protein; regulates innate immunity in rice | Plant immunity; conserved CCV component |
| Dynamin | GTPase; mediates scission of CCV neck | Essential for vesicle release; studied in endocytosis |
| Auxilin | Uncoating factor; recruits Hsc70 to disassemble clathrin | Regulates clathrin recycling |
| Hsc70 | Chaperone; ATPase that uncoats clathrin-coated vesicles | Uncoating mechanism; stress responses |
| Eps15 | Accessory protein; regulates CCV initiation | Modulates adaptor recruitment |
| Epsin | Accessory protein; induces membrane curvature and cargo selection | Membrane remodeling; endocytosis |
| Amphiphysin | BAR domain protein; assists in membrane curvature and scission | Neuronal endocytosis; synaptic function |
| Synaptojanin | Phosphatase; regulates uncoating and synaptic vesicle recycling | Neurotransmission; neurodegeneration |
| PICALM | Clathrin assembly protein; involved in CCV formation | Alzheimer's disease risk factor |
| HIP1R | Huntingtin-interacting protein; regulates clathrin coat dynamics | Neurodegeneration; cancer |
How Is clathrin-coated vesicle Regulated?
Clathrin-coated vesicle formation is regulated at multiple levels, including phosphorylation of coat components, lipid signaling, and mechanical cues such as membrane tension [1,4,6]. CALM supports vesicle completion when membrane tension increases, providing a feedback mechanism. RAB23 modulates signaling pathways that influence nascent vesicle formation. In plants, conserved CCV components like OsSCYL2 are regulated during innate immune responses. These regulatory layers ensure that CCV formation is coordinated with cellular needs and environmental conditions [1,4].
clathrin-coated vesicle and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CLTC | Cancer, neurodegeneration | Knockout and overexpression in cancer cell lines; neuronal models |
| PICALM | Alzheimer's disease | Knock-in of risk variants in iPSC-derived neurons |
| RAB23 | Developmental disorders, cancer | Knockout and point mutation in zebrafish and mammalian cells |
| OsSCYL2 | Plant immunity | Knockout in rice; pathogen infection assays |
| Synaptojanin | Parkinsonism | Knockout in mouse models; neuronal cultures |
Cancer
Alterations in clathrin-coated vesicle components can promote cancer by dysregulating receptor signaling and nutrient uptake. For example, clathrin heavy chain overexpression is observed in some cancers and correlates with poor prognosis. RAB23 is implicated in cell signaling pathways that affect tumor progression. Targeting CCV components is being explored as a therapeutic strategy.
Neurodegeneration
Neurons rely heavily on clathrin-mediated endocytosis for synaptic vesicle recycling, and defects in CCV components are linked to neurodegenerative diseases. PICALM, a clathrin assembly protein, is a risk factor for Alzheimer's disease. Mutations in synaptojanin and auxilin cause early-onset Parkinsonism and other neurological disorders. These findings highlight the importance of CCV function in neuronal health.
Immune disorders
In plants, CCV components such as OsSCYL2 regulate innate immunity, and their dysfunction leads to compromised pathogen defense. In mammals, CCVs control the internalization of immune receptors and thus modulate immune responses. Dysregulation of CCV-mediated trafficking can contribute to autoimmune and inflammatory conditions.
From clathrin-coated vesicle-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CLTC impair CCV formation? | CRISPR knockout of CLTC in HeLa or HEK293 cells |
| How do point mutations in AP2M1 affect cargo selection? | CRISPR point mutation knock-in in cell lines |
| Does a disease-associated variant of PICALM alter endocytosis? | Knock-in of variant in iPSC-derived neurons |
| Where does RAB23 localize during CCV formation? | Tagged knock-in of RAB23 with fluorescent protein |
| Does overexpression of CALM rescue membrane tension defects? | Overexpression of CALM in cells under tension |
| What is the role of OsSCYL2 in plant immunity? | Knockout and overexpression in rice |
How to Study the clathrin-coated vesicle Process
| Method | What It Measures | Typical Application |
|---|---|---|
| TIRF microscopy | Real-time dynamics of CCV formation at plasma membrane | Live-cell imaging of clathrin and cargo |
| Electron microscopy | Ultrastructure of clathrin-coated vesicles | Morphological characterization |
| Mass spectrometry | Protein composition of CCVs | Identification of novel components |
| CRISPR knockout | Loss-of-function effects on CCV formation | Gene function studies [1,2] |
| CRISPR knock-in | Effects of specific mutations or tags | Disease variant modeling |
| Overexpression | Gain-of-function and sufficiency | Rescue experiments |
| In vitro reconstitution | Minimal requirements for coat assembly | Mechanistic studies [1,4] |
| RNA-seq | Transcriptional changes upon CCV perturbation | Pathway analysis |
Imaging and live-cell microscopy
Fluorescence microscopy, including total internal reflection fluorescence (TIRF) and spinning-disk confocal, allows visualization of clathrin-coated vesicle dynamics in live cells. Tagged clathrin and adaptor proteins enable tracking of coat assembly and budding. Electron microscopy provides ultrastructural detail of CCVs.
Proteomics and interactomics
Mass spectrometry-based proteomics can identify the composition of isolated clathrin-coated vesicles and their interacting partners. Affinity purification coupled to mass spectrometry reveals dynamic interactions during CCV formation. These approaches help define the molecular architecture of CCVs.
Genetic perturbation and CRISPR screens
CRISPR knockout, point mutation, and knock-in models enable functional dissection of CCV genes [1,2]. Genome-wide CRISPR screens can identify novel regulators of clathrin-mediated endocytosis. Overexpression studies test sufficiency of individual components.
Biochemical assays
In vitro reconstitution assays with purified clathrin, adaptors, and lipids measure coat assembly and vesicle budding [1,4]. GTP hydrolysis assays assess dynamin function. Phosphorylation assays evaluate regulatory modifications.
How CRISPR Can Be Used to Study GO:0030136 clathrin-coated vesicle
Knockout
CRISPR knockout of CCV genes such as CLTC or AP2M1 abolishes clathrin-coated vesicle formation and reveals essential functions in endocytosis and signaling. Knockout cell lines are valuable for studying cargo-specific effects and compensatory mechanisms.
Point Mutation
CRISPR point mutation knock-in allows precise modeling of disease-associated variants in CCV genes, such as those in AP2M1 or PICALM. These models help distinguish loss-of-function from gain-of-function mechanisms.
Knock-in
Knock-in of fluorescent tags or epitope tags into endogenous CCV genes enables real-time imaging and biochemical isolation of native complexes. This approach preserves physiological expression levels and regulation.
Overexpression
Overexpression of CCV components such as CALM or RAB23 can test sufficiency and rescue phenotypes [6,7]. It is useful for studying dominant-negative or constitutively active variants.
How EDITGENE Supports clathrin-coated vesicle Research
Researchers studying clathrin-coated vesicle-related genes often need to determine whether a candidate gene is causally involved in CCV formation, cargo selection, or disease progression. EDITGENE provides comprehensive CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for clathrin-coated vesicle research.
Frequently Asked Questions About clathrin-coated vesicle
What is GO:0030136 clathrin-coated vesicle?
GO:0030136 is a Gene Ontology cellular_component term describing a vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes.
What genes are involved in clathrin-coated vesicle formation?
Key genes include CLTC, CLTA, CLTB, AP2A1, AP2B1, AP2M1, CALM1, RAB23, and in plants OsSCYL2 [1,5,6,7].
What is the function of clathrin-coated vesicles?
They mediate selective cargo transport during clathrin-mediated endocytosis and intracellular trafficking, including nutrient uptake, receptor signaling, and synaptic vesicle recycling [1,8].
How are clathrin-coated vesicles formed?
They form through initiation and cargo selection by adaptors, clathrin coat assembly and budding, followed by scission and uncoating [1,8].
What diseases are associated with clathrin-coated vesicle dysfunction?
Dysfunction is linked to cancer, neurodegeneration such as Alzheimer's and Parkinson's, and immune disorders [1,7].
What is the role of AP-2 in clathrin-coated vesicles?
AP-2 is the major adaptor complex that links clathrin to the membrane and selects cargo for internalization [1,8].
How does membrane tension affect clathrin-coated vesicle formation?
Increased membrane tension can impede vesicle completion, and CALM supports completion under such conditions.
What is the role of RAB23 in clathrin-coated vesicles?
RAB23 facilitates the formation of nascent clathrin-coated vesicles at the plasma membrane and modulates cell signaling.
How can CRISPR be used to study clathrin-coated vesicle genes?
CRISPR knockout, point mutation, knock-in, and overexpression models enable functional dissection of CCV genes in health and disease [1,2].
Are clathrin-coated vesicles conserved across species?
Yes, they are present in mammals, yeasts, and plants, though with mechanistic divergences.
Conclusion
GO:0030136 clathrin-coated vesicle represents a fundamental cellular component essential for endocytosis, intracellular transport, and signaling across eukaryotes [1,2]. Its study has revealed intricate molecular mechanisms and links to major human diseases, including cancer and neurodegeneration [1,7]. Continued research using advanced CRISPR models and imaging techniques will further illuminate its roles and therapeutic potential [1,2].
References
- 1. Kaksonen M et al.. 2018. Mechanisms of clathrin-mediated endocytosis.. Nat Rev Mol Cell Biol 19(5):313-326 PMID: 29410531
- 2. Johnson A. 2024. Mechanistic divergences of endocytic clathrin-coated vesicle formation in mammals, yeasts and plants.. J Cell Sci 137(16) PMID: 39161994
- 3. Ekanayake G et al.. 2019. Never Walk Alone: Clathrin-Coated Vesicle (CCV) Components in Plant Immunity.. Annu Rev Phytopathol 57:387-409 PMID: 31386597
- 4. Hill E et al.. 2001. Regulation of clathrin-coated vesicle formation.. Biochem Soc Trans 29(Pt 4):375-7 PMID: 11497992
- 5. Yao Y et al.. 2022. A conserved clathrin-coated vesicle component, OsSCYL2, regulates plant innate immunity in rice.. Plant Cell Environ 45(2):542-555 PMID: 34866195
- 6. Willy NM et al.. 2021. CALM supports clathrin-coated vesicle completion upon membrane tension increase.. Proc Natl Acad Sci U S A 118(25) PMID: 34155137
- 7. Hasan MR et al.. 2025. RAB23 facilitates clathrin-coated nascent vesicle formation at the plasma membrane and modulates cell signaling.. Cell Mol Life Sci 82(1):171 PMID: 40261407
- 8. McMahon HT et al.. 2011. Molecular mechanism and physiological functions of clathrin-mediated endocytosis.. Nat Rev Mol Cell Biol 12(8):517-33 PMID: 21779028
