GO:0031293 membrane protein intracellular domain proteolysis: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0031293 membrane protein intracellular domain proteolysis describes the proteolytic cleavage of a transmembrane protein that releases its intracellular domain into the cytosol.
• This process is a key step in regulated intramembrane proteolysis and is essential for signaling, protein quality control, and cellular stress responses [6, 7].
• Major proteases that execute intracellular domain proteolysis include caspases, gamma-secretase, and other intramembrane-cleaving proteases [6, 7].
• Dysregulation of this process contributes to cancer, neurodegeneration, and inflammatory diseases [6, 7, 8].
• CRISPR knockout, point mutation, knock-in, and overexpression models enable precise interrogation of genes involved in this process [2, 5].
• EDITGENE provides end-to-end CRISPR services, including library screening and bioinformatics, to accelerate research on membrane protein intracellular domain proteolysis [1, 2, 3, 4, 5, 6, 7, 8].
Description
Membrane protein intracellular domain proteolysis (GO:0031293) is a biological process in which a transmembrane protein is cleaved by a protease, resulting in the release of its intracellular domain. This event is a hallmark of regulated intramembrane proteolysis, a conserved mechanism that converts membrane-bound proteins into soluble signaling molecules or transcription factors [6, 7]. The process is critical for diverse cellular functions, including development, immune response, and stress adaptation [6, 7]. Researchers study GO:0031293 to understand how cells transmit signals from the membrane to the nucleus and cytoplasm, and how defects in this pathway lead to disease [6, 7, 8]. For example, caspase-mediated cleavage of gasdermin D (GSDMD) releases an intracellular domain that forms pores in the plasma membrane, driving pyroptosis. Similarly, the cholesterol homeostatic regulator SCAP-SREBP2 integrates NLRP3 inflammasome activation with cholesterol biosynthetic signaling through proteolytic processing. These examples highlight the importance of GO:0031293 in both normal physiology and pathology [6, 7]. Understanding the molecular players and regulatory mechanisms of membrane protein intracellular domain proteolysis is essential for developing targeted therapies [6, 7, 8].
membrane protein intracellular domain proteolysis At A Glance
| GO ID | GO:0031293 |
|---|---|
| GO term | membrane protein intracellular domain proteolysis |
| Ontology | biological_process |
| Synonym | membrane protein solubilization |
| Major function | Release of intracellular signaling domains from transmembrane proteins |
| Cellular location | Plasma membrane, endomembranes, and organelle membranes |
| Key proteases | Caspases, gamma-secretase, and other intramembrane-cleaving proteases |
| Associated diseases | Cancer, neurodegeneration, inflammatory disorders |
What Is GO:0031293?
GO:0031293 membrane protein intracellular domain proteolysis is defined as the proteolytic cleavage of a transmembrane protein leading to the release of an intracellular domain. This process typically involves sequential cleavage events: first, the ectodomain is shed by a sheddase, and then the remaining membrane-bound fragment is cleaved within its transmembrane region by an intramembrane protease, liberating the intracellular domain into the cytosol [6, 7]. The released intracellular domain can then translocate to the nucleus or act locally to modulate signaling pathways [6, 7].
Why Is membrane protein intracellular domain proteolysis Important in Cell Biology?
Membrane protein intracellular domain proteolysis is a central mechanism for cellular signal transduction and homeostasis [6, 7]. It allows cells to respond to external and internal cues by converting membrane-bound proteins into active intracellular effectors. This process is essential for development, immune defense, and stress responses, and its dysregulation is implicated in a wide range of diseases, including cancer, Alzheimer's disease, and autoinflammatory conditions [6, 7, 8]. Studying GO:0031293 provides insights into fundamental cell biology and identifies potential therapeutic targets [6, 7, 8].
• Enables rapid signal transduction from the cell surface to the nucleus.
• Controls cell death pathways such as pyroptosis through GSDMD cleavage.
• Regulates cholesterol homeostasis and inflammasome activation via SCAP-SREBP2.
• Modulates immune evasion in cancer through B7-H4 lysosomal degradation.
• Plays a role in stress granule disassembly via G3BP1 ubiquitination.
• Influences autophagy and ER-phagy through TEX264 and nuclear lamina degradation [4, 5].
• Provides targets for therapeutic intervention in cancer and neurodegeneration [6, 7, 8].
• Facilitates protein quality control and membrane protein turnover [4, 5].
• Is amenable to CRISPR-based functional genomics and drug discovery [1, 2].
• Offers opportunities for targeted protein degradation strategies [1, 2].
What Happens During membrane protein intracellular domain proteolysis?
Substrate recognition and ectodomain shedding
In simple terms: First, the part of the membrane protein outside the cell is cut off.
The process begins when a transmembrane protein is recognized by a sheddase, such as a metalloprotease, which cleaves the ectodomain. This shedding event can be triggered by various stimuli, including ligand binding or cellular stress [6, 7]. The remaining membrane-bound fragment, known as the membrane stub, becomes a substrate for intramembrane proteolysis.
Intramembrane cleavage and release of the intracellular domain
In simple terms: Then, a second cut inside the membrane releases the tail of the protein into the cell.
The membrane stub is cleaved within its transmembrane domain by an intramembrane-cleaving protease, such as gamma-secretase or a caspase [6, 7]. This cleavage liberates the intracellular domain into the cytosol. For example, caspase-mediated cleavage of GSDMD releases an N-terminal domain that forms pores in the membrane.
Intracellular domain trafficking and function
In simple terms: The released tail travels to other parts of the cell to do its job.
Once released, the intracellular domain can translocate to the nucleus to regulate gene expression or interact with cytosolic signaling complexes [6, 7]. In the case of SCAP-SREBP2, the intracellular domain of SREBP2 moves to the nucleus to activate cholesterol biosynthetic genes. Similarly, the intracellular domain of B7-H4 may influence immune evasion pathways.
Downstream signaling and cellular outcomes
In simple terms: This cutting process changes how the cell behaves.
The released intracellular domain modulates diverse cellular responses, including inflammation, cell death, and metabolism [6, 7]. For instance, GSDMD-mediated pyroptosis is a key innate immune defense mechanism. Dysregulation of these outcomes can lead to disease, such as cancer or neurodegeneration [6, 7, 8].
Key Genes Involved in GO:0031293 membrane protein intracellular domain proteolysis
The following genes and proteins are central to membrane protein intracellular domain proteolysis, based on published literature [1-8].
| Gene | Major Role | Research Relevance |
|---|---|---|
| GSDMD | Forms pores upon cleavage by caspases | Pyroptosis and inflammation |
| SCAP | Cholesterol sensing and SREBP2 processing | Cholesterol homeostasis and inflammasome |
| SREBP2 | Transcription factor released by proteolysis | Lipid metabolism and inflammation |
| B7-H4 | Immune checkpoint protein subject to lysosomal degradation | Tumor immune evasion |
| G3BP1 | Stress granule component regulated by ubiquitination | Stress granule disassembly |
| TEX264 | ER-phagy receptor with intrinsically disordered regions | ER turnover and autophagy |
| LMNA | Nuclear lamina protein degraded by autophagy | Nuclear envelope integrity |
| CASP1 | Caspase that cleaves GSDMD | Inflammasome and pyroptosis |
| CASP4 | Caspase that cleaves GSDMD | Non-canonical inflammasome |
| CASP5 | Caspase that cleaves GSDMD | Inflammatory cell death |
| NLRP3 | Inflammasome sensor linked to SCAP-SREBP2 | Inflammation and cholesterol |
| PSEN1 | Gamma-secretase subunit | Intramembrane proteolysis |
| PSEN2 | Gamma-secretase subunit | Intramembrane proteolysis |
| NCSTN | Gamma-secretase subunit | Intramembrane proteolysis |
| APH1 | Gamma-secretase subunit | Intramembrane proteolysis |
| PEN2 | Gamma-secretase subunit | Intramembrane proteolysis |
| UBB | Ubiquitin involved in degradation | Protein turnover [3, 5] |
How Is membrane protein intracellular domain proteolysis Regulated?
Membrane protein intracellular domain proteolysis is tightly regulated at multiple levels. Substrate availability, sheddase activity, and intramembrane protease complex assembly control the efficiency of cleavage [6, 7]. Post-translational modifications, such as ubiquitination and palmitoylation, influence the stability and trafficking of substrates; for example, palmitoylation prevents B7-H4 lysosomal degradation. Ubiquitination of G3BP1 mediates stress granule disassembly in a context-specific manner. Additionally, autophagy pathways regulate the degradation of nuclear lamina and ER components, indirectly affecting proteolysis [4, 5]. The dTAG system allows rapid and specific degradation of target proteins, providing a tool to study these regulatory mechanisms.
membrane protein intracellular domain proteolysis and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GSDMD | Pyroptosis and inflammatory diseases | Knockout mice or cell lines |
| B7-H4 | Tumor immune evasion | Overexpression and knockout cancer models |
| SCAP | Cholesterol metabolism and inflammation | Point mutation knock-in models |
| SREBP2 | Lipid disorders | Knock-in and knockout models |
| G3BP1 | Stress granule-related diseases | Knockout and tagged knock-in |
Cancer
Dysregulated membrane protein intracellular domain proteolysis contributes to cancer progression. For instance, palmitoylation prevents B7-H4 lysosomal degradation, sustaining tumor immune evasion. Targeting this pathway could enhance anti-tumor immunity. Additionally, lysosome-targeting chimaeras (LYTACs) can degrade extracellular proteins, offering therapeutic potential.
Inflammatory diseases
GSDMD cleavage by caspases is a key step in pyroptosis, a pro-inflammatory cell death pathway. Excessive pyroptosis contributes to inflammatory diseases such as sepsis and autoinflammatory syndromes. The SCAP-SREBP2 pathway integrates cholesterol metabolism with NLRP3 inflammasome activation, linking lipid homeostasis to inflammation.
Neurodegeneration
Intramembrane proteolysis by gamma-secretase is implicated in Alzheimer's disease through the generation of amyloid-beta peptides. Although the exact mechanisms are complex, dysregulation of this process is a hallmark of neurodegeneration.
From membrane protein intracellular domain proteolysis-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate intracellular domain proteolysis? | CRISPR knockout cell line |
| What is the effect of a specific point mutation in a protease? | Point mutation knock-in |
| How does tagging a substrate affect its cleavage? | Tagged knock-in |
| Can overexpression of a substrate drive signaling? | Overexpression cell line |
| Which genes are essential for the process? | CRISPR library screening |
| How does degradation of a target protein affect the pathway? | dTAG system |
How to Study the membrane protein intracellular domain proteolysis Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screen | Gene essentiality | Identify regulators of proteolysis |
| Immunoblotting | Protein cleavage products | Validate intracellular domain release |
| Proteomics | Global protein changes | Discover substrates and effectors |
| Fluorescence microscopy | Subcellular localization | Track intracellular domain trafficking |
| dTAG degradation | Target protein depletion | Study acute effects of protein loss |
| RNA-seq | Transcriptional changes | Assess downstream signaling |
| Bioinformatics | Pathway enrichment | Interpret omics data |
| Flow cytometry | Cell death and marker expression | Quantify pyroptosis |
CRISPR knockout screening
Genome-wide CRISPR knockout screens can identify genes required for membrane protein intracellular domain proteolysis. This approach is unbiased and scalable, enabling discovery of novel regulators.
Proteomics and immunoblotting
Proteomic analyses and immunoblotting can detect the cleavage products of transmembrane proteins, confirming the release of intracellular domains [6, 7]. These methods are essential for validating specific cleavage events.
Imaging and subcellular localization
Fluorescence microscopy can visualize the translocation of intracellular domains to the nucleus or other compartments [6, 7]. Tagged knock-in models enable real-time tracking of cleavage and localization.
Bioinformatics and pathway analysis
Bioinformatics tools can integrate genomic and proteomic data to predict substrates and regulators of intracellular domain proteolysis [3, 4]. This approach helps prioritize candidates for experimental validation.
How CRISPR Can Be Used to Study GO:0031293 membrane protein intracellular domain proteolysis
Knockout
CRISPR knockout of genes such as GSDMD or SCAP can abolish intracellular domain proteolysis, revealing their essential roles [6, 7]. Knockout cell lines are valuable for loss-of-function studies.
Point Mutation
Introducing point mutations in protease active sites or substrate cleavage sites can dissect the molecular requirements for proteolysis. This approach provides mechanistic insights.
Knock-in
Knock-in of tagged versions of substrates, such as GFP or HA tags, allows tracking of cleavage and localization. This is useful for studying dynamics in live cells.
Overexpression
Overexpression of substrates or proteases can enhance the process and facilitate detection of intracellular domains. It is often used to study gain-of-function effects.
How EDITGENE Supports membrane protein intracellular domain proteolysis Research
Researchers studying membrane protein intracellular domain proteolysis-related genes often need to determine whether a candidate gene is causally involved in the process or is merely a bystander. EDITGENE provides a comprehensive suite of CRISPR services to address these questions with precision and scale.
Contact EDITGENE today to design your custom CRISPR model for membrane protein intracellular domain proteolysis research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| MMP7 Knockout HEK293 Cell Line | EDJ-KQ114 | Human | 4316 | Details Get a Quote |
| ADAM9 Knockout HEK293 Cell Line | EDJ-KQ242 | Human | 8754 | Details Get a Quote |
| PSEN1 Knockout HEK293 Cell Line | EDJ-KQ325 | Human | 5663 | Details Get a Quote |
| NCSTN Knockout HEK293 Cell Line | EDJ-KQ434 | Human | 23385 | Details Get a Quote |
| PSENEN Knockout HEK293 Cell Line | EDJ-KQ979 | Human | 55851 | Details Get a Quote |
| MBTPS1 Knockout HEK293 Cell Line | EDJ-KQ1067 | Human | 8720 | Details Get a Quote |
| MBTPS2 Knockout HEK293 Cell Line | EDJ-KQ2239 | Human | 51360 | Details Get a Quote |
| RHBDD1 Knockout HEK293 Cell Line | EDJ-KQ10022 | Human | 84236 | Details Get a Quote |
| SPPL2A Knockout HEK293 Cell Line | EDJ-KQ10236 | Human | 84888 | Details Get a Quote |
| SPPL2B Knockout HEK293 Cell Line | EDJ-KQ15491 | Human | 56928 | Details Get a Quote |
| SPPL2C Knockout HEK293 Cell Line | EDJ-KQ15492 | Human | 162540 | Details Get a Quote |
| TGFB1 Knockout HEK293 Cell Line | EDJ-KQ17770 | Human | 7040 | Details Get a Quote |
| PSENEN Knockout A-549 Cell Line | EDJ-KQ20001 | Human | 55851 | Details Get a Quote |
| PSENEN Knockout HCT 116 Cell Line | EDJ-KQ20002 | Human | 55851 | Details Get a Quote |
| PSENEN Knockout HeLa Cell Line | EDJ-KQ20003 | Human | 55851 | Details Get a Quote |
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Frequently Asked Questions About membrane protein intracellular domain proteolysis
What is membrane protein intracellular domain proteolysis?
It is the proteolytic cleavage of a transmembrane protein that releases its intracellular domain into the cytosol, as defined by GO:0031293.
What genes are involved in membrane protein intracellular domain proteolysis?
Key genes include GSDMD, SCAP, SREBP2, B7-H4, G3BP1, TEX264, and caspases such as CASP1, CASP4, and CASP5 [3, 4, 6, 7, 8].
What is the role of GSDMD in this process?
GSDMD is cleaved by caspases, releasing an intracellular domain that forms pores in the membrane and induces pyroptosis.
How is membrane protein intracellular domain proteolysis regulated?
It is regulated by substrate availability, sheddase activity, intramembrane protease complex assembly, and post-translational modifications such as ubiquitination and palmitoylation [3, 6, 7, 8].
What diseases are associated with defects in this process?
Cancer, inflammatory diseases, and neurodegeneration have been linked to dysregulation of membrane protein intracellular domain proteolysis [6, 7, 8].
What methods are used to study this process?
CRISPR knockout screens, immunoblotting, proteomics, fluorescence microscopy, and bioinformatics are commonly used [1, 3, 6, 7].
Can CRISPR be used to model membrane protein intracellular domain proteolysis?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools for studying this process [2, 6].
What is the dTAG system?
The dTAG system is a chemical-genetic method for rapid and specific degradation of target proteins, useful for studying acute effects.
How does SCAP-SREBP2 relate to this process?
SCAP-SREBP2 integrates cholesterol homeostasis with NLRP3 inflammasome activation through proteolytic processing of SREBP2.
What services does EDITGENE offer for this research?
EDITGENE provides knockout, point mutation, knock-in, overexpression cell models, CRISPR library screening, and bioinformatics services [1, 2, 3, 4, 5, 6, 7, 8].
Conclusion
Membrane protein intracellular domain proteolysis (GO:0031293) is a fundamental biological process that governs signal transduction, cell death, and metabolism [6, 7]. Its dysregulation is implicated in cancer, inflammation, and neurodegeneration, making it a compelling target for therapeutic intervention [6, 7, 8]. Advances in CRISPR technology and functional genomics are accelerating the discovery of new players and mechanisms in this pathway [1, 2]. EDITGENE stands ready to support researchers with state-of-the-art CRISPR models and bioinformatics to unravel the complexities of this process.
References
- 1. Banik SM et al.. 2020. Lysosome-targeting chimaeras for degradation of extracellular proteins.. Nature 584(7820):291-297 PMID: 32728216
- 2. Nabet B et al.. 2018. The dTAG system for immediate and target-specific protein degradation.. Nat Chem Biol 14(5):431-441 PMID: 29581585
- 3. Gwon Y et al.. 2021. Ubiquitination of G3BP1 mediates stress granule disassembly in a context-specific manner.. Science 372(6549):eabf6548 PMID: 34739333
- 4. Chino H et al.. 2019. Intrinsically Disordered Protein TEX264 Mediates ER-phagy.. Mol Cell 74(5):909-921.e6 PMID: 31006538
- 5. Dou Z et al.. 2015. Autophagy mediates degradation of nuclear lamina.. Nature 527(7576):105-9 PMID: 26524528
- 6. Wang K et al.. 2020. Structural Mechanism for GSDMD Targeting by Autoprocessed Caspases in Pyroptosis.. Cell 180(5):941-955.e20 PMID: 32109412
- 7. Guo C et al.. 2018. Cholesterol Homeostatic Regulator SCAP-SREBP2 Integrates NLRP3 Inflammasome Activation and Cholesterol Biosynthetic Signaling in Macrophages.. Immunity 49(5):842-856.e7 PMID: 30366764
- 8. Yan Y et al.. 2025. Palmitoylation prevents B7-H4 lysosomal degradation sustaining tumor immune evasion.. Nat Commun 16(1):4254 PMID: 40341398
