GO:0005019 platelet-derived growth factor beta-receptor activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0005019 describes the molecular function of the platelet-derived growth factor beta-receptor (PDGFRB), which binds PDGF-BB or PDGF-AB to initiate intracellular signaling.
• PDGFRB is a receptor tyrosine kinase that dimerizes upon ligand binding, a step that can be impaired by dynamin inhibitors.
• PDGFRB signaling is critical in development, particularly in early endothelial cell differentiation.
• Dysregulated PDGFRB activity is implicated in cancers such as breast cancer brain metastasis and in myelofibrosis.
• Mutations in PDGFRB cause Kosaki overgrowth syndrome, a rare genetic disorder.
• The bovine papillomavirus E5 protein targets PDGFRB, highlighting its role in viral oncogenesis.
Description
Platelet-derived growth factor beta-receptor activity (GO:0005019) is a molecular function defined as combining with platelet-derived growth factor isoform PDGF-BB or PDGF-AB to initiate a change in cell activity. This activity is mediated by the platelet-derived growth factor receptor beta (PDGFRB), a receptor tyrosine kinase that plays pivotal roles in cell proliferation, migration, and survival. PDGFRB signaling is essential for embryonic development, particularly in the formation of blood vessels and support of endothelial cells. Dysregulation of this activity contributes to a spectrum of diseases, including cancer, fibrosis, and overgrowth syndromes [5,6,8]. Understanding the molecular mechanisms of PDGFRB activation and its downstream effectors is therefore of broad biomedical importance.
platelet-derived growth factor beta-receptor activity At A Glance
| GO ID | GO:0005019 |
|---|---|
| GO term | platelet-derived growth factor beta-receptor activity |
| Ontology | molecular_function |
| Synonym | betaPDGF receptor activity, PDGF beta-receptor activity |
| Major function | Binding PDGF-BB or PDGF-AB to initiate intracellular signaling |
| Receptor type | Receptor tyrosine kinase |
| Ligand specificity | PDGF-BB and PDGF-AB |
| Cellular role | Regulation of cell proliferation, migration, and survival |
What Is GO:0005019?
In simple terms, GO:0005019 represents the ability of the PDGF beta-receptor to bind specific forms of platelet-derived growth factor (PDGF-BB or PDGF-AB) and trigger a signal inside the cell. This function is a molecular activity, meaning it describes what the receptor does at the molecular level, rather than a larger biological process or cellular component.
Why Is platelet-derived growth factor beta-receptor activity Important in Cell Biology?
PDGFRB activity is a central node in cell signaling, influencing processes from embryonic development to tissue repair and disease. Its dysfunction is directly linked to oncogenesis, fibrotic disorders, and developmental abnormalities, making it a prime target for therapeutic intervention and a key subject in biomedical research [5,6,8].
• Regulates cell proliferation, migration, and survival in various cell types.
• Essential for early endothelial cell differentiation during development.
• Implicated in cancer progression, including breast cancer metastasis to the brain.
• Plays a role in myelofibrosis, a bone marrow disorder.
• Mutations cause Kosaki overgrowth syndrome, a rare genetic disease.
• Targeted by viral oncoproteins such as the bovine papillomavirus E5 protein.
• Involved in hypothalamic inflammation and obesity through pericyte signaling.
• Activates downstream effectors like Abl2 via direct binding and phosphorylation.
• Dimerization and signaling can be modulated by dynamin inhibitors.
• Serves as a model for understanding receptor tyrosine kinase regulation.
What Happens During platelet-derived growth factor beta-receptor activity?
Ligand Binding and Receptor Dimerization
In simple terms: The receptor binds to a growth factor, which causes two receptor molecules to pair up.
PDGF-BB or PDGF-AB binds to the extracellular domain of PDGFRB, inducing receptor dimerization. This dimerization is a critical step for activation and can be impaired by dynamin inhibitors, as shown in studies using PDGF-BB stimulation.
Autophosphorylation and Kinase Activation
In simple terms: The paired receptors add phosphate groups to each other, turning on their signaling ability.
Upon dimerization, PDGFRB molecules autophosphorylate on tyrosine residues, creating docking sites for downstream signaling proteins. This activation is essential for propagating the signal inside the cell.
Downstream Signaling Pathways
In simple terms: The activated receptor triggers a cascade of signals that tell the cell to grow, move, or survive.
Phosphorylated PDGFRB recruits and activates multiple signaling proteins, including Abl2, which binds directly and is phosphorylated by the receptor. This leads to activation of pathways such as PI3K/AKT and MAPK, driving cellular responses.
Biological Outcomes
In simple terms: The signals lead to changes in cell behavior, like division or migration.
PDGFRB signaling promotes early endothelial cell differentiation and contributes to pathological processes such as hypothalamic inflammation and obesity. In cancer, it can enhance metastasis, for example in breast cancer brain metastasis.
Key Genes Involved in GO:0005019 platelet-derived growth factor beta-receptor activity
The following genes and proteins are key players in platelet-derived growth factor beta-receptor activity and its signaling network.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PDGFRB | Encodes the PDGF beta-receptor; binds PDGF-BB/AB and initiates signaling | Central to GO:0005019; mutations cause Kosaki overgrowth syndrome |
| PDGFB | Ligand for PDGFRB; forms PDGF-BB | Activates PDGFRB in various contexts |
| PDGFA | Ligand for PDGFRB; forms PDGF-AB | Can activate PDGFRB |
| ABL2 | Non-receptor tyrosine kinase activated by PDGFRB | Direct binding and phosphorylation by PDGFRB |
| DNM2 | Dynamin 2, involved in receptor internalization | Dynamin inhibitors impair PDGFRB dimerization and signaling |
| PIK3CA | PI3K catalytic subunit; downstream of PDGFRB | Mediates PDGFRB-driven survival signals |
| AKT1 | Serine/threonine kinase; downstream effector | Promotes cell survival and proliferation |
| MAPK1 | Mitogen-activated protein kinase; downstream effector | Regulates proliferation and migration |
| STAT3 | Transcription factor; downstream of PDGFRB | Contributes to gene expression changes |
| PLCG1 | Phospholipase C gamma 1; downstream of PDGFRB | Mediates calcium signaling |
| SRC | Non-receptor tyrosine kinase; interacts with PDGFRB | Modulates PDGFRB signaling |
| PTPN11 | Protein tyrosine phosphatase; regulates PDGFRB | Dephosphorylates PDGFRB |
| GRB2 | Adaptor protein; links PDGFRB to RAS-MAPK pathway | Essential for downstream signaling |
| SHC1 | Adaptor protein; binds activated PDGFRB | Activates RAS-MAPK pathway |
| JAK2 | Janus kinase 2; phosphorylated by PDGFRB | Activates STAT signaling |
| E5 | Bovine papillomavirus E5 protein; targets PDGFRB | Viral oncogenesis |
How Is platelet-derived growth factor beta-receptor activity Regulated?
PDGFRB activity is tightly regulated at multiple levels. Ligand availability controls activation, and receptor internalization and degradation modulate signal duration. Dynamin inhibitors can impair PDGFRB dimerization and signaling, indicating a role for endocytic machinery in regulation. Additionally, phosphatases such as PTPN11 can dephosphorylate the receptor, attenuating signaling. In disease contexts, mutations in PDGFRB can lead to constitutive activation, as seen in Kosaki overgrowth syndrome.
platelet-derived growth factor beta-receptor activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PDGFRB | Kosaki overgrowth syndrome | Knock-in mouse with patient mutation |
| PDGFRB | Breast cancer brain metastasis | Xenograft model with PDGFRB overexpression |
| PDGFRB | Myelofibrosis | Bone marrow transplantation model |
| PDGFRB | Hypothalamic inflammation and obesity | Diet-induced obesity mouse model |
| PDGFRB | Viral oncogenesis | Cell lines expressing BPV E5 protein |
PDGFRB in Cancer
Aberrant PDGFRB signaling promotes tumor progression and metastasis. In breast cancer, stromal PDGFRB signaling enhances metastasis to the brain. PDGFRB activation is also implicated in myelofibrosis, where it contributes to bone marrow fibrosis.
PDGFRB in Overgrowth Syndromes
Recurrent mutations in PDGFRB cause Kosaki overgrowth syndrome, characterized by skeletal overgrowth, skin abnormalities, and other features. These mutations often lead to constitutive receptor activation.
PDGFRB in Metabolic and Inflammatory Disorders
PDGF signaling in pericytes promotes hypothalamic inflammation and obesity, linking PDGFRB activity to metabolic regulation.
PDGFRB in Development
PDGFRB is essential for early endothelial cell differentiation, highlighting its role in vascular development.
From platelet-derived growth factor beta-receptor activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| What is the effect of PDGFRB knockout on development? | PDGFRB knockout mouse |
| How do point mutations in PDGFRB cause Kosaki overgrowth syndrome? | Knock-in mouse expressing mutant PDGFRB |
| Can tagged PDGFRB be used to track receptor dynamics? | Knock-in of epitope-tagged PDGFRB |
| What are the effects of PDGFRB overexpression in cancer? | Xenograft models with PDGFRB overexpression |
| How does PDGFRB signaling contribute to myelofibrosis? | Bone marrow transplantation with PDGFRB-activated cells |
| What is the role of dynamin in PDGFRB dimerization? | Cells treated with dynamin inhibitors |
How to Study the platelet-derived growth factor beta-receptor activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Western blot | Protein phosphorylation and expression | Assessing PDGFRB activation |
| Immunoprecipitation | Protein-protein interactions | Detecting receptor dimerization |
| CRISPR knockout | Gene function | Studying PDGFRB role in cells |
| Knock-in mutagenesis | Effect of specific mutations | Modeling Kosaki syndrome |
| RNA-seq | Transcriptional changes | Identifying downstream targets |
| Proteomics | Protein interactions and modifications | Mapping PDGFRB signaling network |
| Live-cell imaging | Receptor dynamics | Visualizing dimerization |
| CRISPR library screening | Genome-wide modifiers | Finding regulators of PDGFRB signaling |
Studying PDGFRB Activation
Western blotting for phosphorylated PDGFRB and downstream effectors is commonly used to assess activation. Immunoprecipitation can detect receptor dimerization.
Genetic Manipulation
CRISPR/Cas9 knockout of PDGFRB in cell lines or animal models helps elucidate its function. Point mutations can be introduced to model disease-associated variants.
Imaging and Tracking
Fluorescence microscopy with tagged PDGFRB allows visualization of receptor localization and trafficking. Live-cell imaging can monitor dimerization dynamics.
High-Throughput Screening
CRISPR library screening can identify modifiers of PDGFRB signaling, while bioinformatics analyzes transcriptomic changes upon pathway activation.
How CRISPR Can Be Used to Study GO:0005019 platelet-derived growth factor beta-receptor activity
Knockout
CRISPR/Cas9-mediated knockout of PDGFRB generates cell lines or animal models lacking the receptor, useful for studying its essential functions in development and disease.
Point Mutation
Introducing specific point mutations (e.g., those found in Kosaki overgrowth syndrome) via CRISPR allows researchers to study the molecular consequences of these variants.
Knock-in
Knock-in of tagged PDGFRB (e.g., GFP or HA) enables tracking of receptor expression, localization, and interactions in live cells.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can drive PDGFRB levels up, modeling cancers or other conditions with enhanced signaling.
How EDITGENE Supports platelet-derived growth factor beta-receptor activity Research
Researchers studying platelet-derived growth factor beta-receptor activity-related genes often need to determine whether a candidate gene is causally involved in receptor signaling, disease progression, or cellular responses. EDITGENE provides a comprehensive suite of CRISPR-based services to address these questions with precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for platelet-derived growth factor beta-receptor activity research.
Frequently Asked Questions About platelet-derived growth factor beta-receptor activity
What is platelet-derived growth factor beta-receptor activity?
It is a molecular function (GO:0005019) where the PDGF beta-receptor binds PDGF-BB or PDGF-AB to initiate intracellular signaling.
What genes are involved in platelet-derived growth factor beta-receptor activity?
Key genes include PDGFRB (the receptor), PDGFB and PDGFA (ligands), and downstream effectors like ABL2, PIK3CA, and MAPK1 [1,3].
What diseases are associated with PDGFRB mutations?
PDGFRB mutations cause Kosaki overgrowth syndrome and are implicated in cancers like breast cancer brain metastasis and myelofibrosis [5,6,8].
How is PDGFRB activated?
PDGF-BB or PDGF-AB binding induces receptor dimerization and autophosphorylation, activating downstream pathways.
What is the role of PDGFRB in development?
PDGFRB promotes early endothelial cell differentiation and is essential for vascular development.
Can PDGFRB be targeted therapeutically?
Yes, inhibitors like imatinib target PDGFRB, and research continues to explore its role in cancer and fibrosis.
What are the downstream effectors of PDGFRB?
Downstream effectors include ABL2, PI3K/AKT, MAPK, and STAT proteins.
How do dynamin inhibitors affect PDGFRB?
Dynamin inhibitors impair PDGFRB dimerization and signaling, suggesting a role for endocytosis in receptor activation.
What is Kosaki overgrowth syndrome?
A rare genetic disorder caused by mutations in PDGFRB, characterized by skeletal overgrowth and other features.
How can CRISPR be used to study PDGFRB?
CRISPR can create knockouts, point mutations, knock-ins, and overexpression models to dissect PDGFRB function in health and disease.
Conclusion
Platelet-derived growth factor beta-receptor activity (GO:0005019) is a fundamental molecular function with broad implications in development, cancer, and genetic disorders. Understanding its regulation and downstream effects offers opportunities for therapeutic intervention. EDITGENE provides advanced CRISPR tools to study PDGFRB and its network, empowering researchers to uncover new insights.
References
- 1. Heldin J et al.. 2019. Dynamin inhibitors impair platelet-derived growth factor β-receptor dimerization and signaling.. Exp Cell Res 380(1):69-79 PMID: 30970237
- 2. Okekawa A et al.. 2024. Platelet-derived growth factor signaling in pericytes promotes hypothalamic inflammation and obesity.. Mol Med 30(1):21 PMID: 38317079
- 3. Wu K et al.. 2021. Platelet-derived growth factor receptor beta activates Abl2 via direct binding and phosphorylation.. J Biol Chem 297(1):100883 PMID: 34144039
- 4. DiMaio D et al.. 2000. The platelet-derived growth factor beta receptor as a target of the bovine papillomavirus E5 protein.. Cytokine Growth Factor Rev 11(4):283-93 PMID: 10959076
- 5. Marneth AE et al.. 2020. Busy signal: platelet-derived growth factor activation in myelofibrosis.. Haematologica 105(8):1988-1990 PMID: 32739885
- 6. Thies KA et al.. 2021. Stromal Platelet-Derived Growth Factor Receptor-β Signaling Promotes Breast Cancer Metastasis in the Brain.. Cancer Res 81(3):606-618 PMID: 32327406
- 7. Rolny C et al.. 2006. Platelet-derived growth factor receptor-beta promotes early endothelial cell differentiation.. Blood 108(6):1877-86 PMID: 16690964
- 8. Gladkauskas T et al.. 2026. Recurrent platelet-derived growth factor receptor beta gene mutations in Kosaki overgrowth syndrome: a molecular and clinical overview.. Clin Dysmorphol 35(2):47-55 PMID: 41223009
