GO:0008429 phosphatidylethanolamine binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0008429 phosphatidylethanolamine binding describes the molecular function of selectively binding phosphatidylethanolamine (PE), a major zwitterionic glycerophospholipid of cell membranes.
• PE binding underlies diverse biological processes, including membrane trafficking, autophagy, blood coagulation, phagocytic recognition of apoptotic and bacterial extracellular vesicles, and plant reproduction.
• PE-binding proteins such as PEBP/RKIP family members act as conductors of dual reproduction in plants with vegetative storage organs.
• PE levels in the endoplasmic reticulum regulate SREBP-1 cleavage and hepatic steatosis, linking PE binding to metabolic disease.
• PE binding modulates alpha-synuclein membrane behavior, implicating this function in neurodegeneration.
• CRISPR-based knockout, point-mutation, knock-in, and overexpression models are essential to dissect the causal roles of PE-binding proteins in health and disease.
Description
Phosphatidylethanolamine (PE) is a class of glycerophospholipids in which a phosphatidyl group is esterified to the hydroxyl group of ethanolamine. The Gene Ontology molecular function GO:0008429, phosphatidylethanolamine binding, describes the selective interaction of a protein or protein complex with PE. This function is fundamental to membrane biology because PE is not merely a structural lipid; it serves as a signaling platform and a ligand for protein recruitment. Researchers study PE binding to understand how cells decode lipid identity into biological outcomes, from membrane fusion and autophagy to immune recognition and plant development. The importance of PE binding spans kingdoms of life. In plants, phosphatidylethanolamine-binding proteins (PEBPs) coordinate flowering and vegetative storage organ formation, acting as conductors of dual reproduction. In mammals, PE binding by coagulation factors contributes to the assembly of membrane-bound enzyme complexes during blood clotting. PE exposed on the surface of apoptotic and bacterial extracellular vesicles acts as a phagocytic ligand, and its recognition depends on PE-binding receptors. Moreover, PE in the endoplasmic reticulum controls SREBP-1 cleavage, and its dysregulation is linked to hepatic steatosis and MASLD. Given this breadth, GO:0008429 is a focal point for functional genomics. Knockout, point-mutation, knock-in, and overexpression cell models allow researchers to test how individual PE-binding proteins contribute to lipid homeostasis, vesicle trafficking, and disease. This article integrates the QuickGO definition with verified PubMed literature to provide a research-grade overview of phosphatidylethanolamine binding, its mechanisms, key genes, and experimental approaches.
phosphatidylethanolamine binding At A Glance
| GO ID | GO:0008429 |
|---|---|
| GO term | phosphatidylethanolamine binding |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Selective binding to phosphatidylethanolamine, a zwitterionic glycerophospholipid, enabling membrane association, lipid sensing, and ligand recognition. |
| Representative proteins | PEBP/RKIP family, coagulation factors, phagocytic receptors, alpha-synuclein. |
| Biological contexts | Membrane trafficking, autophagy, blood coagulation, phagocytosis, plant reproduction, lipid metabolism. |
| Disease relevance | Hepatic steatosis, MASLD, neurodegeneration, coagulation disorders, cancer. |
| Research methods | CRISPR knockout/knock-in, lipid binding assays, nanodisc arrays, imaging, proteomics. |
What Is GO:0008429?
Phosphatidylethanolamine binding (GO:0008429) is the molecular function of binding to a phosphatidylethanolamine, a class of glycerophospholipids in which a phosphatidyl group is esterified to the hydroxyl group of ethanolamine. This activity is mediated by specific protein domains or pockets that recognize the ethanolamine headgroup and/or the acyl chains of PE, enabling proteins to associate with PE-enriched membranes or to sequester PE as a ligand.
Why Is phosphatidylethanolamine binding Important in Cell Biology?
Phosphatidylethanolamine binding is important because PE is one of the most abundant phospholipids in eukaryotic membranes, and its specific recognition by proteins governs fundamental processes such as membrane fusion, autophagy, blood coagulation, and immune clearance of dying cells and bacteria. Dysregulation of PE binding or PE homeostasis contributes to metabolic diseases like hepatic steatosis and MASLD, to neurodegeneration through altered alpha-synuclein membrane interactions, and potentially to cancer and coagulation disorders. Understanding this molecular function therefore provides mechanistic insight into both normal physiology and disease pathogenesis.
• PE binding is essential for autophagy, where acyl-CoA binding protein and PE-binding partners regulate nutrient-dependent autophagosome formation.
• Coagulation factors bind PE with synergy to phosphatidylserine, enabling assembly of membrane-bound enzyme complexes on activated platelets.
• PE exposed on apoptotic and bacterial extracellular vesicles acts as a phagocytic ligand, and its recognition is mediated by PE-binding receptors.
• PE binding modulates alpha-synuclein membrane-binding behavior, linking this function to Parkinson's disease and other synucleinopathies.
• In plants, PEBP family proteins control flowering time and vegetative storage organ development, with agricultural relevance.
• DGAT2 inhibition increases ER phosphatidylethanolamine, blocking SREBP-1 cleavage and improving hepatic steatosis, highlighting PE binding in metabolic control.
• Diet-induced RKIP downregulation disrupts PC/PE-ER homeostasis and drives MASLD, showing PE-binding proteins in liver disease.
• Metabolism-dependent succinylation can govern resource allocation for antibiotic resistance, potentially involving PE-binding proteins.
• PE binding is a target for developing inhibitors or modulators of coagulation, autophagy, and lipid signaling.
• CRISPR screens can identify novel PE-binding proteins and their roles in disease, accelerating therapeutic discovery.
Molecular Mechanism of phosphatidylethanolamine binding
Recognition of the PE headgroup
In simple terms: Proteins that bind PE have a pocket or surface that fits the ethanolamine phosphate headgroup of the lipid.
The molecular function GO:0008429 involves specific non-covalent interactions between a protein and the phosphatidylethanolamine headgroup. Structural and biochemical studies of PEBP/RKIP family proteins show a conserved ligand-binding pocket that accommodates the ethanolamine moiety, enabling discrimination from other phospholipids. Coagulation factors also exhibit PE-dependent membrane binding, with nanodisc array sensors revealing synergy between PE and phosphatidylserine binding. This headgroup recognition is the first step in PE-dependent membrane recruitment.
Membrane insertion and acyl chain interactions
In simple terms: After grabbing the headgroup, the protein may insert part of itself into the membrane, interacting with the lipid tails.
Many PE-binding proteins, such as alpha-synuclein, undergo conformational changes upon membrane interaction that involve both headgroup and acyl chain contacts. Phosphatidylethanolamine modulates alpha-synuclein membrane-binding behavior, affecting its helical folding and aggregation propensity. Similarly, the phagocytic recognition of PE on extracellular vesicles requires membrane insertion and clustering of receptors. These interactions stabilize the protein on PE-enriched membranes and can trigger downstream signaling.
Cofactors and lipid synergy
In simple terms: PE binding often works together with other lipids or cofactors to achieve full activity.
PE binding is frequently synergistic with phosphatidylserine (PS) binding. Seven coagulation factors display PE-PS binding synergy, which is critical for efficient assembly of tenase and prothrombinase complexes on activated platelet membranes. In the endoplasmic reticulum, PE levels influence SREBP-1 cleavage, and DGAT2 inhibition increases PE, thereby blocking SREBP-1 processing and improving steatosis. Thus, PE binding is modulated by the local lipid environment and metabolic state.
Regulation by metabolic signals
In simple terms: The cell's metabolic status can change how much PE is available or how well proteins bind it.
PE homeostasis is regulated by enzymes of the Kennedy pathway and by lipid droplet-associated proteins such as DGAT2. Inhibition of DGAT2 elevates ER PE, which in turn inhibits SREBP-1 cleavage, linking PE binding to lipogenic gene expression. Diet-induced downregulation of RKIP disrupts PC/PE-ER homeostasis and drives MASLD, indicating that nutritional and metabolic signals control PE-binding protein abundance and function. Additionally, metabolism-dependent succinylation may alter protein-lipid interactions, as shown for antibiotic resistance resource allocation.
Functional consequences of PE binding
In simple terms: Once a protein binds PE, it can change its location, activity, or interactions, leading to diverse cellular outcomes.
PE binding can serve as a membrane anchor for enzymes, a signal for vesicle recognition, or a trigger for conformational activation. In autophagy, acyl-CoA binding protein regulates nutrient-dependent autophagy, likely through PE-dependent membrane remodeling. In phagocytosis, PE on apoptotic and bacterial extracellular vesicles acts as a ligand for receptors, mediating their removal. In plants, PEBP proteins act as conductors of dual reproduction, controlling flowering and storage organ formation. These examples illustrate how a single molecular function yields context-dependent physiology.
Key Genes Involved in GO:0008429 phosphatidylethanolamine binding
The following genes and proteins represent major players in phosphatidylethanolamine binding and related processes, as supported by the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PEBP1 (RKIP) | Phosphatidylethanolamine-binding protein; regulates RAF/MEK/ERK and NF-kB signaling | Implicated in MASLD, cancer, and plant reproduction |
| PEBP2 | PEBP family member in plants | Controls flowering and vegetative storage organ development |
| PEBP3 | PEBP family member in plants | Regulates plant architecture and reproduction |
| PEBP4 | PEBP family member in plants | Involved in dual reproduction strategies |
| F7 (Factor VII) | Coagulation factor that binds PE-PS synergistically | Hemostasis and thrombosis research |
| F9 (Factor IX) | Coagulation factor with PE-PS binding synergy | Hemophilia B and anticoagulant studies |
| F10 (Factor X) | Coagulation factor binding PE-PS | Thrombosis and drug development |
| F2 (Prothrombin) | Coagulation factor with PE-PS binding synergy | Coagulation cascade studies |
| F5 (Factor V) | Coagulation cofactor binding PE-PS | Thrombophilia research |
| F8 (Factor VIII) | Coagulation cofactor with PE-PS binding synergy | Hemophilia A research |
| SNCA (alpha-synuclein) | Membrane-binding protein modulated by PE | Parkinson's disease and synucleinopathies |
| DGAT2 | Diacylglycerol acyltransferase 2; regulates ER PE levels | Hepatic steatosis and MASLD |
| SREBP-1 | Transcription factor regulated by ER PE levels | Lipogenesis and metabolic disease |
| ACBP | Acyl-CoA binding protein; regulates autophagy via PE-dependent mechanisms | Autophagy and nutrient sensing |
| TIM4 (TIMD4) | Phagocytic receptor recognizing PE on extracellular vesicles | Apoptotic cell clearance and immunity |
| STAB2 | Stabilin-2; PE-binding phagocytic receptor | Clearance of bacterial extracellular vesicles |
| MFGE8 | Milk fat globule-EGF factor 8; binds PE and PS | Phagocytosis and inflammation |
How Is phosphatidylethanolamine binding Regulated?
Phosphatidylethanolamine binding is regulated at multiple levels. The availability of PE itself is controlled by metabolic enzymes such as DGAT2, and inhibition of DGAT2 increases ER PE, which in turn blocks SREBP-1 cleavage and reduces lipogenesis. Diet-induced downregulation of RKIP disrupts PC/PE-ER homeostasis, linking nutritional status to PE-binding protein function. Additionally, post-translational modifications such as succinylation can influence protein-lipid interactions and resource allocation during antibiotic resistance. Autophagy-related PE binding is regulated by nutrient-dependent signaling through acyl-CoA binding protein. These layers of regulation ensure that PE binding is tuned to cellular metabolic demands.
phosphatidylethanolamine binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DGAT2 | Hepatic steatosis and MASLD | Knockout or point-mutation in hepatocytes; overexpression in liver cell lines |
| PEBP1 (RKIP) | MASLD and cancer | Knockout and knock-in in hepatic cell lines; overexpression in cancer models |
| SNCA | Parkinson's disease | Point mutations (A53T, A30P) and knockout in neuronal cells |
| F7, F9, F10 | Coagulation disorders | Knockout in hepatocytes; point mutations for hemophilia models |
| TIMD4, STAB2 | Bacterial infection clearance | Knockout in macrophages; overexpression in phagocytic cells |
Metabolic dysfunction-associated steatotic liver disease (MASLD)
PE binding and PE homeostasis are critically involved in liver lipid metabolism. DGAT2 inhibition increases ER phosphatidylethanolamine, which blocks SREBP-1 cleavage and improves hepatic steatosis. Diet-induced RKIP downregulation disrupts PC/PE-ER homeostasis and drives MASLD, indicating that PE-binding proteins such as RKIP are protective against steatosis. These findings suggest that modulating PE binding could be a therapeutic strategy for MASLD.
Neurodegeneration
Phosphatidylethanolamine modulates alpha-synuclein membrane-binding behavior, influencing its aggregation and toxicity. Since alpha-synuclein aggregation is a hallmark of Parkinson's disease and other synucleinopathies, PE binding may directly impact disease onset and progression. Targeting PE-alpha-synuclein interactions could offer neuroprotective approaches.
Coagulation disorders and thrombosis
Coagulation factors rely on PE-phosphatidylserine binding synergy for efficient assembly on activated platelets. Alterations in PE binding could contribute to bleeding or thrombotic tendencies. Understanding these interactions may inform anticoagulant drug design.
Infection and immunity
PE exposed on bacterial extracellular vesicles acts as a phagocytic ligand, and its recognition by receptors such as TIM4 and STAB2 mediates clearance. This PE-binding mechanism is important for host defense against bacterial infections and for resolution of inflammation.
From phosphatidylethanolamine binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of PEBP1 affect PE binding and MASLD progression? | PEBP1 knockout hepatocytes or mouse models |
| How do point mutations in SNCA alter PE binding and aggregation? | SNCA point-mutation knock-in neuronal cell lines |
| Can overexpression of DGAT2 rescue ER PE levels and SREBP-1 cleavage? | DGAT2 overexpression in hepatic cell lines |
| What is the role of TIM4 in PE-dependent phagocytosis? | TIMD4 knockout macrophages and tagged knock-in for imaging |
| Do coagulation factor mutations affect PE-PS synergy? | Point-mutation knock-in of F7, F9, F10 in liver cells |
| How does ACBP regulate autophagy via PE binding? | ACBP knockout and overexpression in autophagy reporter cells |
How to Study the phosphatidylethanolamine binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Nanodisc array sensor | Real-time binding affinity and synergy | Coagulation factor PE-PS binding |
| Lipid overlay assay | Protein binding to immobilized lipids | Screening PE-binding specificity |
| CRISPR knockout screen | Gene essentiality for PE-dependent phenotypes | Identifying regulators of SREBP-1 cleavage |
| Lipidomics (LC-MS) | PE and other phospholipid levels | Metabolic disease models |
| Fluorescence microscopy | Subcellular localization of PE and proteins | Autophagy and phagocytosis studies |
| Co-immunoprecipitation | Protein-protein interactions | Identifying PE-binding complexes |
| Alpha-synuclein aggregation assay | Effect of PE on protein aggregation | Neurodegeneration research |
| Autophagy flux assay | Autophagosome formation and degradation | Nutrient-dependent autophagy |
Lipid binding assays
Direct measurement of phosphatidylethanolamine binding can be performed using lipid overlay assays, liposome co-sedimentation, or nanodisc arrays. Nanodisc arrays on silicon photonic sensors have been used to reveal PE-phosphatidylserine binding synergy of coagulation factors. These methods quantify affinity and specificity for PE versus other phospholipids.
CRISPR-based genetic screens
Genome-wide CRISPR knockout or activation screens can identify genes that regulate PE binding or PE-dependent processes. For example, screens in hepatocytes under lipid stress could uncover modifiers of SREBP-1 cleavage and PE homeostasis. Such screens are powerful for discovering novel PE-binding proteins and pathways.
Imaging and proteomics
Fluorescence microscopy with PE-specific probes (e.g., duramycin) and tagged PE-binding proteins can visualize localization in live cells. Proteomics approaches such as lipid-protein overlay or affinity purification coupled to mass spectrometry can identify new PE-binding partners. These methods provide spatial and interaction data.
Metabolic and lipidomic profiling
Mass spectrometry-based lipidomics quantifies PE species and other phospholipids in cells or tissues. This is essential to link PE binding to metabolic phenotypes, as shown in studies of DGAT2 inhibition and RKIP downregulation. Combining lipidomics with transcriptomics reveals downstream effects on SREBP-1 and lipogenesis.
How CRISPR Can Be Used to Study GO:0008429 phosphatidylethanolamine binding
Knockout
CRISPR knockout of genes encoding PE-binding proteins (e.g., PEBP1, DGAT2, TIMD4) allows researchers to test loss-of-function phenotypes. For example, PEBP1 knockout in hepatocytes can reveal its role in MASLD, while DGAT2 knockout affects ER PE levels and SREBP-1 cleavage. Knockout models are essential for establishing causality.
Point Mutation
Point mutations can be introduced to disrupt specific PE-binding residues without eliminating the entire protein. This is particularly useful for alpha-synuclein (SNCA) to mimic disease-associated mutations (A53T, A30P) and assess their impact on PE binding and aggregation. Point-mutation knock-in cell lines provide precise mechanistic insights.
Knock-in
Knock-in of tagged versions of PE-binding proteins (e.g., GFP or HA tags) enables live-cell imaging and proteomic pull-down. Tagged knock-in of TIM4 or STAB2 can track their localization to PE-containing vesicles during phagocytosis. Knock-in of disease-relevant mutations also creates isogenic models for drug testing.
Overexpression
Overexpression of PE-binding proteins or their mutants can test gain-of-function effects. For instance, overexpressing DGAT2 in hepatic cells increases lipid droplet formation and alters PE distribution. Overexpression of PEBP1 can suppress tumor growth or modulate signaling pathways. These models complement knockout studies.
How EDITGENE Supports phosphatidylethanolamine binding Research
Researchers studying phosphatidylethanolamine binding-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. This requires precise genetic manipulation, which is best achieved through CRISPR-based cell model engineering. EDITGENE provides comprehensive services to create knockout, point-mutation, knock-in, and overexpression cell models, as well as CRISPR library screening and bioinformatics support.
Contact EDITGENE today to design your custom CRISPR model for phosphatidylethanolamine binding research.
Frequently Asked Questions About phosphatidylethanolamine binding
What is phosphatidylethanolamine binding?
Phosphatidylethanolamine binding (GO:0008429) is the molecular function of selectively binding to phosphatidylethanolamine, a glycerophospholipid, enabling proteins to associate with membranes or recognize PE as a ligand.
What genes are involved in phosphatidylethanolamine binding?
Key genes include PEBP1 (RKIP), PEBP2-4, coagulation factors (F2, F5, F7, F8, F9, F10), SNCA, DGAT2, SREBP-1, ACBP, TIMD4, STAB2, and MFGE8.
How is phosphatidylethanolamine binding studied?
It is studied using lipid binding assays, nanodisc arrays, CRISPR screens, lipidomics, fluorescence microscopy, and co-immunoprecipitation.
Why is phosphatidylethanolamine binding important in disease?
It is implicated in MASLD, neurodegeneration, coagulation disorders, and infection clearance, making it a therapeutic target.
What is the role of PEBP1 in phosphatidylethanolamine binding?
PEBP1 (RKIP) binds PE and regulates signaling pathways; its downregulation disrupts PC/PE-ER homeostasis and drives MASLD.
How does phosphatidylethanolamine affect alpha-synuclein?
PE modulates alpha-synuclein membrane-binding behavior, influencing its aggregation and potential neurotoxicity in Parkinson's disease.
Can CRISPR be used to study phosphatidylethanolamine binding?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect the roles of PE-binding proteins in cells.
What are the synonyms for GO:0008429?
There are no synonyms listed for GO:0008429 in QuickGO.
Which diseases are linked to phosphatidylethanolamine binding?
MASLD, hepatic steatosis, Parkinson's disease, coagulation disorders, and bacterial infections are linked to PE binding.
How does phosphatidylethanolamine binding regulate autophagy?
Acyl-CoA binding protein regulates nutrient-dependent autophagy, likely through PE-dependent membrane remodeling.
Conclusion
Phosphatidylethanolamine binding (GO:0008429) is a fundamental molecular function that bridges lipid metabolism, membrane biology, and disease. From plant reproduction to human coagulation and neurodegeneration, PE-binding proteins execute diverse roles by recognizing a single phospholipid. The integration of CRISPR cell models, lipidomics, and structural biology continues to unravel the mechanisms and therapeutic potential of this interaction. EDITGENE's services empower researchers to create precise genetic models and accelerate discoveries in this field.
References
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- 2. Rong S et al.. 2024. DGAT2 inhibition blocks SREBP-1 cleavage and improves hepatic steatosis by increasing phosphatidylethanolamine in the ER.. Cell Metab 36(3):617-629.e7 PMID: 38340721
- 3. Kavianpour AA et al.. 2025. Phosphatidylethanolamine is a phagocytic ligand implicated in the binding and removal of apoptotic and bacterial extracellular vesicles.. Curr Biol 35(17):4276-4284.e5 PMID: 40795848
- 4. Namba N et al.. 2026. Phosphatidylethanolamine modulates α-synuclein membrane-binding behavior.. Biophys J 125(3):811-820 PMID: 41445182
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