GO:1900186 negative regulation of clathrin-dependent endocytosis: Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1900186 describes any process that stops, prevents, or reduces the frequency, rate, or extent of clathrin-mediated endocytosis, a major route for selective cargo internalization.
• Negative regulation can occur through cargo-specific motifs, such as membrane-proximal N-terminal residues in the dopamine transporter that reduce its own endocytosis.
• Lipid signaling enzymes, including diacylglycerol kinase delta, can inhibit clathrin-dependent endocytosis by modulating AP2alpha binding and phosphoinositide levels.
• Phosphoinositides are critical regulators of clathrin-dependent endocytosis in plants, and their manipulation can alter pollen tube growth.
• Clathrin-dependent endocytosis is required for specific signaling outcomes, such as TrkB-dependent Akt activation and neuronal protection, so its negative regulation can impact cell survival.
• Dysregulation of clathrin-dependent endocytosis and its negative control contributes to diverse pathologies, including cancer, neurodegeneration, and metabolic disorders [1,3,7].
Description
Clathrin-dependent endocytosis is a fundamental cellular process by which cells internalize nutrients, signaling receptors, and other cargo through clathrin-coated pits. The term GO:1900186, negative regulation of clathrin-dependent endocytosis, refers to any process that stops, prevents, or reduces the frequency, rate, or extent of this endocytic pathway. This regulation is essential for maintaining cellular homeostasis, controlling signal transduction, and responding to environmental cues [3,7]. Researchers study this process to understand how cells fine-tune membrane trafficking and how its dysregulation contributes to disease [1,3,7]. Negative regulation can be achieved through multiple mechanisms, including direct modification of cargo proteins, changes in lipid composition, or altered expression of endocytic machinery components [2,3,5]. For example, the dopamine transporter is negatively regulated by its own membrane-proximal N-terminal residues, which reduce its endocytosis. Similarly, diacylglycerol kinase delta inhibits clathrin-dependent endocytosis by affecting AP2alpha binding and phosphoinositide metabolism. In plants, phosphoinositides regulate clathrin-dependent endocytosis at the pollen tube tip, highlighting evolutionary conservation. Understanding GO:1900186 is important because clathrin-mediated endocytosis is hijacked by pathogens, controls nutrient uptake, and modulates signaling pathways that drive cancer and neurodegeneration [1,7,8]. By identifying the genes and mechanisms that negatively regulate this pathway, researchers can develop targeted interventions for diseases where endocytosis is perturbed [3,7].
negative regulation of clathrin-dependent endocytosis At A Glance
| GO ID | GO:1900186 |
|---|---|
| GO term | negative regulation of clathrin-dependent endocytosis |
| Ontology | biological_process |
| Synonym | down regulation of clathrin-mediated endocytosis; inhibition of clathrin-dependent endocytosis; negative regulation of clathrin coated pit-dependent endocytosis |
| Major function | Reduces the rate or extent of clathrin-mediated endocytosis, thereby controlling cargo internalization and downstream signaling [2,3]. |
| Regulatory inputs | Cargo-specific motifs, lipid kinases, phosphoinositides, and signaling pathways [2,3,5]. |
| Cellular context | Occurs in various cell types, including neurons, myoblasts, and plant pollen tubes [1,3,5]. |
| Disease relevance | Implicated in cancer, neurodegeneration, and metabolic disorders [1,3,7]. |
What Is GO:1900186?
GO:1900186, negative regulation of clathrin-dependent endocytosis, is a biological process that encompasses any mechanism that stops, prevents, or reduces the frequency, rate, or extent of clathrin-mediated endocytosis. This includes downregulation of clathrin-coated pit formation, inhibition of cargo recruitment, and interference with the endocytic machinery [2,3].
Why Is negative regulation of clathrin-dependent endocytosis Important in Cell Biology?
Negative regulation of clathrin-dependent endocytosis is crucial for cellular adaptation because it allows cells to selectively reduce the uptake of specific cargo, thereby modulating signal transduction, nutrient acquisition, and membrane composition [2,3,7]. Dysregulation of this process can lead to pathological conditions such as cancer, where altered endocytosis affects receptor availability, and neurodegeneration, where impaired endocytic control contributes to neuronal dysfunction [1,3,7].
• Controls the surface levels of signaling receptors, thereby influencing cell proliferation and survival.
• Regulates nutrient uptake, such as glucose transport in myoblasts.
• Modulates neurotransmitter transporter availability, affecting synaptic transmission.
• Impacts pathogen entry, as clathrin-mediated endocytosis is used by various pathogens.
• Plays a role in plant development, including pollen tube growth.
• Contributes to metabolic disorders by affecting adiponectin receptor internalization.
• Influences neuronal protection and dendritic growth through TrkB signaling.
• Can be targeted to enhance drug delivery or inhibit viral entry.
• Provides a mechanism for cells to desensitize to prolonged stimuli.
• Dysregulation is linked to cancer progression and metastasis.
What Happens During negative regulation of clathrin-dependent endocytosis?
Cargo Recognition and Motif-Mediated Inhibition
In simple terms: Some proteins carry built-in tags that tell the cell not to internalize them.
Negative regulation can be mediated by specific sequences within cargo proteins. For instance, the dopamine transporter contains membrane-proximal N-terminal residues that act as a negative regulatory motif, reducing its own endocytosis. This intrinsic control ensures that transporter levels at the cell surface are maintained within a physiological range.
Lipid-Mediated Regulation
In simple terms: Fats in the membrane can send signals that slow down endocytosis.
Lipid signaling enzymes and phosphoinositides play key roles in regulating clathrin-dependent endocytosis. Diacylglycerol kinase delta inhibits clathrin-dependent endocytosis by consuming diacylglycerol and producing phosphatidic acid, which affects AP2alpha binding and coated pit formation. In plant pollen tubes, phosphoinositides regulate clathrin-dependent endocytosis at the tip, and altering their levels affects growth.
Regulation of Endocytic Machinery
In simple terms: The proteins that build the endocytic machinery can be turned down or blocked.
Negative regulation can target core components of the endocytic machinery, such as clathrin, AP2, and dynamin. For example, in Leishmania, clathrin-mediated hemoglobin endocytosis is essential for survival, and its negative regulation would impair parasite viability. In mammalian cells, clathrin-dependent endocytosis of GLUT4 is regulated by mitochondrial uncoupling, indicating metabolic control of the machinery.
Signaling-Dependent Inhibition
In simple terms: Signals from outside the cell can tell it to stop taking in certain molecules.
Extracellular signals can activate pathways that negatively regulate clathrin-dependent endocytosis. For instance, TrkB-dependent Akt signaling requires clathrin-dependent endocytosis for neuronal protection, and interfering with this endocytosis reduces Akt activation. Conversely, negative regulation of endocytosis can be a mechanism to desensitize cells to growth factors.
Key Genes Involved in GO:1900186 negative regulation of clathrin-dependent endocytosis
The following genes and proteins have been experimentally implicated in the negative regulation of clathrin-dependent endocytosis or in clathrin-dependent endocytosis itself, providing a starting point for functional studies.
| Gene | Major Role | Research Relevance |
|---|---|---|
| DGKD | Diacylglycerol kinase delta; inhibits clathrin-dependent endocytosis by modulating AP2alpha binding and phosphoinositides | Target for studying lipid control of endocytosis |
| SLC6A3 | Dopamine transporter; its N-terminal residues negatively regulate its own endocytosis | Model for cargo-specific endocytosis regulation |
| ADIPOR1 | Adiponectin receptor 1; undergoes clathrin- and Rab5-dependent endocytosis | Link to metabolic regulation |
| NTRK2 | TrkB receptor; clathrin-dependent endocytosis required for Akt-mediated neuronal protection | Neuronal survival and growth |
| SLC2A4 | GLUT4 glucose transporter; clathrin-dependent and independent endocytosis in myoblasts | Metabolic control of glucose uptake |
| CLTC | Clathrin heavy chain; core component of coated pits | Central to endocytic machinery |
| AP2A1 | AP2alpha subunit; binds cargo and lipids, regulated by DGKD | Key adaptor for cargo selection |
| FGFR3 | Fibroblast growth factor receptor 3; can be internalized via clathrin-independent pathways | Signaling and endocytosis crosstalk |
| PIP5K | Phosphatidylinositol-4-phosphate 5-kinase; produces PIP2 for endocytosis | Lipid regulator in plants |
| RAB5 | Small GTPase; involved in early endosome fusion | Endosomal trafficking |
| DNM2 | Dynamin 2; mediates vesicle scission in clathrin-dependent endocytosis | Mechanistic target |
| EPS15 | Epidermal growth factor receptor pathway substrate 15; accessory endocytic protein | Coated pit assembly |
| AP2M1 | AP2 mu subunit; cargo recognition | Adaptor complex function |
| SH3GL2 | Endophilin A1; membrane curvature and scission | Endocytic vesicle formation |
| GAK | Cyclin G-associated kinase; regulates clathrin-coated pit dynamics | Auxiliary factor |
| AAK1 | AP2-associated kinase 1; phosphorylates AP2 mu | Regulatory kinase |
| PICALM | Phosphatidylinositol binding clathrin assembly protein; clathrin assembly | Endocytosis and disease |
| BIN1 | Bridging integrator 1; membrane remodeling | Endocytosis and neurodegeneration |
How Is negative regulation of clathrin-dependent endocytosis Regulated?
Negative regulation of clathrin-dependent endocytosis is itself regulated by various signaling pathways and cellular states. For example, mitochondrial uncoupling alters the balance between clathrin-dependent and independent endocytosis of GLUT4 in myoblasts, suggesting metabolic control. In plants, phosphoinositide levels at the pollen tube tip regulate clathrin-dependent endocytosis, and manipulating these lipids affects growth. Additionally, diacylglycerol kinase delta activity and its binding to AP2alpha are critical for its inhibitory effect on endocytosis. These examples illustrate that negative regulation is integrated with lipid metabolism, energy status, and developmental signals.
negative regulation of clathrin-dependent endocytosis and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NTRK2 | Neurodegeneration, cancer | Knockout or point mutation in neuronal cell lines |
| SLC6A3 | Dopaminergic disorders | Knock-in of N-terminal mutations in dopaminergic neurons |
| SLC2A4 | Type 2 diabetes, insulin resistance | Overexpression or knockout in myoblasts |
| ADIPOR1 | Metabolic syndrome | Knockout in adipocytes or hepatocytes |
| CLTC | Cancer, viral entry | CRISPR knockout in cancer cell lines |
Cancer
Altered clathrin-dependent endocytosis affects the internalization of growth factor receptors, thereby influencing proliferative signaling. Negative regulation of this pathway can lead to sustained receptor activation, contributing to tumorigenesis [1,7]. For instance, TrkB-dependent Akt signaling requires clathrin-dependent endocytosis, and its dysregulation is linked to cancer cell survival.
Neurodegeneration
Neurons rely on clathrin-dependent endocytosis for synaptic vesicle recycling and neurotrophin signaling. Negative regulation of this process can impair neuronal protection and dendritic growth, as seen with TrkB signaling. The dopamine transporter's endocytosis is negatively regulated by its N-terminal residues, and its dysregulation is associated with dopaminergic disorders.
Metabolic Disorders
Clathrin-dependent endocytosis of GLUT4 and adiponectin receptor 1 is critical for glucose and lipid metabolism. Negative regulation of these endocytic events can contribute to insulin resistance and metabolic syndrome [1,4]. Mitochondrial uncoupling modulates GLUT4 endocytosis, linking energy status to metabolic control.
Infectious Diseases
Many pathogens exploit clathrin-mediated endocytosis for entry. Leishmania requires clathrin-mediated hemoglobin endocytosis for survival, so negative regulation of this pathway could be a therapeutic strategy. Understanding how host cells negatively regulate endocytosis may inform treatments against pathogens that hijack this route.
From negative regulation of clathrin-dependent endocytosis-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X negatively regulate clathrin-dependent endocytosis? | CRISPR knockout of gene X followed by endocytosis assays |
| Does a specific point mutation in a cargo protein alter its endocytosis? | Point mutation knock-in using CRISPR |
| Does tagging a protein affect its endocytic regulation? | Knock-in of fluorescent tag |
| Does overexpression of a lipid kinase inhibit endocytosis? | Overexpression cell line |
| Does a gene's negative regulation depend on its kinase activity? | Kinase-dead point mutation knock-in |
| Can we identify novel negative regulators? | CRISPR library screening |
How to Study the negative regulation of clathrin-dependent endocytosis Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Transferrin uptake assay | Rate of clathrin-dependent endocytosis | Quantify negative regulation in knockout cells |
| TIRF microscopy | Clathrin-coated pit dynamics | Visualize effects of regulators |
| Co-immunoprecipitation | Protein-protein interactions | Identify AP2alpha binding partners |
| Phosphoinositide profiling | Lipid levels | Assess lipid-mediated regulation |
| CRISPR screen | Genes affecting endocytosis | Discover novel negative regulators |
| Flow cytometry | Surface receptor levels | Measure endocytosis of specific cargo |
| Western blot | Protein expression and phosphorylation | Validate knockout or knock-in |
| RNA-seq | Transcriptional changes | Identify pathways co-regulated with endocytosis |
Endocytosis Assays
To measure clathrin-dependent endocytosis, researchers use fluorescently labeled transferrin or antibodies against specific cargo, followed by flow cytometry or microscopy. Negative regulation can be assessed by comparing uptake rates in cells with genetic modifications.
Proteomics and Interactomics
Mass spectrometry-based proteomics can identify proteins that associate with endocytic machinery and their post-translational modifications. For example, AP2alpha binding partners can be isolated to study regulation.
Live-Cell Imaging
Total internal reflection fluorescence (TIRF) microscopy allows visualization of clathrin-coated pit dynamics in real time. This method can reveal how negative regulators affect pit initiation, lifetime, and scission.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens coupled with endocytosis readouts can identify novel negative regulators of clathrin-dependent endocytosis.
How CRISPR Can Be Used to Study GO:1900186 negative regulation of clathrin-dependent endocytosis
Knockout
CRISPR knockout of candidate genes can determine whether they are required for negative regulation of clathrin-dependent endocytosis. For example, knocking out DGKD would test its role in inhibiting endocytosis.
Point Mutation
Introducing point mutations, such as kinase-dead versions of DGKD, can dissect the importance of enzymatic activity in negative regulation. Similarly, mutating the N-terminal residues of SLC6A3 can test their role in self-inhibition of endocytosis.
Knock-in
Knock-in of fluorescent tags or epitope tags allows visualization and biochemical analysis of endocytic proteins at endogenous levels. This approach can reveal how negative regulators affect protein trafficking.
Overexpression
Overexpression of wild-type or mutant genes can test gain-of-function effects on endocytosis. For instance, overexpressing DGKD may enhance negative regulation, while overexpressing a mutant may not.
How EDITGENE Supports negative regulation of clathrin-dependent endocytosis Research
Researchers studying negative regulation of clathrin-dependent endocytosis-related genes often need to determine whether a candidate gene is causally involved in this process. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate such investigations, from knockout to knock-in and library screening.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of clathrin-dependent endocytosis research.
Frequently Asked Questions About negative regulation of clathrin-dependent endocytosis
What is GO:1900186?
GO:1900186 is the Gene Ontology term for negative regulation of clathrin-dependent endocytosis, describing any process that stops, prevents, or reduces the frequency, rate, or extent of clathrin-mediated endocytosis.
What genes are involved in negative regulation of clathrin-dependent endocytosis?
Genes such as DGKD, SLC6A3, and NTRK2 have been implicated in regulating clathrin-dependent endocytosis, with DGKD and SLC6A3 acting as negative regulators [2,3,7].
How is clathrin-dependent endocytosis negatively regulated?
It can be negatively regulated by cargo-specific motifs, lipid signaling enzymes like diacylglycerol kinase delta, and phosphoinositide levels [2,3,5].
Why is negative regulation of clathrin-dependent endocytosis important?
It controls surface receptor levels, nutrient uptake, and signaling, and its dysregulation is linked to cancer, neurodegeneration, and metabolic disorders [1,3,7].
What diseases are associated with dysregulated clathrin-dependent endocytosis?
Cancer, neurodegeneration, metabolic disorders, and infectious diseases are associated with altered clathrin-dependent endocytosis [1,3,7,8].
What methods are used to study negative regulation of clathrin-dependent endocytosis?
Common methods include transferrin uptake assays, TIRF microscopy, co-immunoprecipitation, and CRISPR screens.
Can CRISPR be used to study negative regulation of clathrin-dependent endocytosis?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression are powerful tools to dissect gene function in this process [2,3].
What is the role of DGKD in clathrin-dependent endocytosis?
DGKD inhibits clathrin-dependent endocytosis by modulating AP2alpha binding and phosphoinositide levels.
How does the dopamine transporter regulate its own endocytosis?
Membrane-proximal N-terminal residues of the dopamine transporter negatively regulate its endocytosis.
What is the connection between TrkB and clathrin-dependent endocytosis?
TrkB-dependent Akt-mediated neuronal protection requires clathrin-dependent endocytosis, so negative regulation of endocytosis can impact neuronal survival.
Conclusion
Negative regulation of clathrin-dependent endocytosis (GO:1900186) is a critical cellular process that fine-tunes membrane trafficking and signaling. Through diverse mechanisms involving cargo motifs, lipid signaling, and endocytic machinery, cells can reduce the rate of clathrin-mediated endocytosis to adapt to changing conditions [2,3,5]. Dysregulation of this process contributes to major human diseases, making it an attractive target for therapeutic intervention [1,3,7]. Continued research using CRISPR and advanced imaging will further elucidate the molecular players and their roles in health and disease.
References
- 1. Antonescu CN et al.. 2008. Clathrin-dependent and independent endocytosis of glucose transporter 4 (GLUT4) in myoblasts: regulation by mitochondrial uncoupling.. Traffic 9(7):1173-90 PMID: 18435821
- 2. Kawasaki T et al.. 2008. Regulation of clathrin-dependent endocytosis by diacylglycerol kinase delta: importance of kinase activity and binding to AP2alpha.. Biochem J 409(2):471-9 PMID: 17880279
- 3. Sorkina T et al.. 2009. Negative regulation of dopamine transporter endocytosis by membrane-proximal N-terminal residues.. J Neurosci 29(5):1361-74 PMID: 19193883
- 4. Ding Q et al.. 2009. Endocytosis of adiponectin receptor 1 through a clathrin- and Rab5-dependent pathway.. Cell Res 19(3):317-27 PMID: 18982021
- 5. Zhao Y et al.. 2010. Phosphoinositides regulate clathrin-dependent endocytosis at the tip of pollen tubes in Arabidopsis and tobacco.. Plant Cell 22(12):4031-44 PMID: 21189293
- 6. Haugsten EM et al.. 2011. Clathrin- and dynamin-independent endocytosis of FGFR3--implications for signalling.. PLoS One 6(7):e21708 PMID: 21779335
- 7. Zheng J et al.. 2008. Clathrin-dependent endocytosis is required for TrkB-dependent Akt-mediated neuronal protection and dendritic growth.. J Biol Chem 283(19):13280-8 PMID: 18353779
- 8. Agarwal S et al.. 2013. Clathrin-mediated hemoglobin endocytosis is essential for survival of Leishmania.. Biochim Biophys Acta 1833(5):1065-77 PMID: 23328080
