GO:0140144 non-collagenous component of basement membrane: Components, Assembly and Research Methods, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140144 defines the non-collagenous compartment of the solid phase in basement membrane ECM, including glycoproteins such as laminins and nidogens.
• This compartment excludes collagen IV but is functionally interdependent with it, and non-collagenous domains of basement membrane collagens also carry independent biological activities.
• Laminins are the principal non-collagenous adhesive glycoproteins and can trigger intracellular signaling in tumor cells.
• The non-collagenous component is a major target in anti-glomerular basement membrane disease, where autoantibodies recognize non-collagenous epitopes [2,4].
• Proteolytic digestion of non-collagenous basement membrane proteins by metalloproteinases such as Ht-e demonstrates their susceptibility to enzymatic remodeling.
• Genetic background strongly influences experimental autoimmune anti-GBM glomerulonephritis, making model selection critical for functional studies.
Description
The basement membrane is a specialized extracellular matrix sheet that separates epithelial, endothelial, and other cell layers from underlying stroma. GO:0140144, non-collagenous component of basement membrane, describes the non-collagenous compartment of the solid phase of this matrix, including glycoproteins such as laminins and nidogens. This term is essential for researchers because it distinguishes the collagen IV scaffold from the functionally distinct glycoprotein network that mediates cell adhesion, signaling, and barrier properties. Non-collagenous domains of basement membrane collagens themselves have been shown to carry new functional roles beyond structural support, indicating that the non-collagenous compartment is not merely a passive filler. Laminin-induced signaling in tumor cells further demonstrates that non-collagenous basement membrane proteins actively influence cell behavior. In human disease, the non-collagenous component is a key antigenic target in anti-glomerular basement membrane disease, where autoantibodies bind non-collagenous epitopes and drive rapidly progressive glomerulonephritis [2,4]. Proteolytic processing of non-collagenous basement membrane proteins by hemorrhagic metalloproteinases such as Ht-e from Crotalus atrox venom illustrates their vulnerability to enzymatic degradation. In dystrophic recessive epidermolysis bullosa, the three-dimensional distribution of basement membrane components is altered, affecting the non-collagenous network. Strain differences in experimental autoimmune anti-GBM glomerulonephritis highlight the genetic control of immune responses to non-collagenous basement membrane antigens. Finally, antigenic properties of a non-collagenous reticulin component of normal connective tissue were recognized decades ago, underscoring the long-standing interest in this compartment. Together, these findings establish GO:0140144 as a central node for understanding basement membrane biology, matrix remodeling, and immune-mediated disease.
non-collagenous component of basement membrane At A Glance
| GO ID | GO:0140144 |
|---|---|
| GO term | non-collagenous component of basement membrane |
| Ontology | cellular_component |
| Synonym | none |
| Major function | Provides glycoprotein-based adhesive and signaling platform within basement membrane ECM, including laminins and nidogens [1,5] |
| Key components | Laminins, nidogens, and other non-collagenous glycoproteins |
| Related disease | Anti-glomerular basement membrane disease [2,4] |
| Experimental relevance | Target of proteolytic digestion by metalloproteinases and genetic modifiers in autoimmune models |
What Is GO:0140144?
GO:0140144, non-collagenous component of basement membrane, is a cellular component ontology term that refers to the non-collagenous compartment of the solid phase in basement membrane extracellular matrix. It includes glycoproteins such as laminins and nidogens, but excludes collagen IV and other collagenous constituents. This definition captures the glycoprotein-rich network that assembles alongside the collagen scaffold and provides adhesive and signaling functions.
Why Is non-collagenous component of basement membrane Important in Cell Biology?
GO:0140144 is important because the non-collagenous component of the basement membrane is not a passive structural element but an active signaling and adhesive interface that regulates cell behavior, tissue architecture, and immune recognition. Laminins within this compartment can induce intracellular signaling in tumor cells, linking the matrix directly to cancer progression. Non-collagenous domains of basement membrane collagens have been assigned new functional roles, expanding the biological scope of this compartment beyond structural support. In anti-glomerular basement membrane disease, autoantibodies target non-collagenous epitopes, making this compartment a central player in autoimmune renal injury [2,4]. Proteolytic degradation of non-collagenous basement membrane proteins by metalloproteinases such as Ht-e demonstrates that this compartment is dynamically remodeled during tissue injury and inflammation. The three-dimensional distribution of basement membrane components is altered in dystrophic recessive epidermolysis bullosa, implicating non-collagenous proteins in skin fragility disorders. Genetic background effects in experimental autoimmune anti-GBM glomerulonephritis further show that immune responses to non-collagenous basement membrane antigens are under host genetic control. Even historically, a non-collagenous reticulin component of normal connective tissue was recognized for its antigenic properties, highlighting its immunological relevance. Thus, GO:0140144 is a critical term for researchers in matrix biology, immunology, nephrology, dermatology, and oncology.
• Defines the glycoprotein-rich compartment of basement membrane ECM that mediates cell adhesion and signaling.
• Laminins in this compartment can trigger intracellular signaling in tumor cells, linking matrix to cancer.
• Non-collagenous domains of basement membrane collagens have independent functional roles beyond structural support.
• Autoantibodies against non-collagenous epitopes cause anti-glomerular basement membrane disease [2,4].
• Proteolytic digestion by metalloproteinases such as Ht-e remodels this compartment during tissue damage.
• Altered three-dimensional distribution of basement membrane components occurs in dystrophic recessive epidermolysis bullosa.
• Genetic background strongly influences experimental autoimmune anti-GBM glomerulonephritis, affecting model reproducibility.
• Antigenic properties of non-collagenous reticulin components were recognized in normal connective tissue.
• Provides a conceptual framework for distinguishing collagenous and non-collagenous matrix functions in research.
• Supports development of targeted therapies for autoimmune and fibrotic diseases involving basement membrane antigens [2,4].
Structure and Composition of non-collagenous component of basement membrane
Laminin glycoprotein network
In simple terms: Laminins are large cross-shaped proteins that form the main adhesive web in the non-collagenous part of the basement membrane.
Laminins are the principal non-collagenous glycoproteins of the basement membrane and are included in GO:0140144. They can induce intracellular signaling in tumor cells, demonstrating that this network actively communicates with cells rather than serving only as a static scaffold. Laminin-induced signaling pathways are relevant to cancer cell adhesion, migration, and survival.
Nidogen and bridging glycoproteins
In simple terms: Nidogens are connector proteins that link the laminin web to the collagen scaffold, stabilizing the whole basement membrane.
Nidogens are non-collagenous glycoproteins included in GO:0140144 and act as bridging molecules between laminins and collagen IV. Their presence in the non-collagenous compartment helps organize the solid phase of the basement membrane ECM. The three-dimensional distribution of basement membrane components, including non-collagenous proteins, is altered in dystrophic recessive epidermolysis bullosa.
Non-collagenous domains of basement membrane collagens
In simple terms: Even collagen proteins have non-collagenous parts that can act independently and have their own biological roles.
Non-collagenous domains of basement membrane collagens have been assigned new functional roles beyond structural support. These domains can be released or act as independent modules, contributing to the functional repertoire of the non-collagenous compartment. This expands the definition of GO:0140144 beyond classical glycoproteins such as laminins and nidogens.
Proteolytic susceptibility and remodeling
In simple terms: Enzymes can cut the non-collagenous proteins of the basement membrane, allowing the matrix to be remodeled during injury or disease.
Proteolytic digestion of non-collagenous basement membrane proteins by the hemorrhagic metalloproteinase Ht-e from Crotalus atrox venom has been demonstrated. This indicates that the non-collagenous compartment is susceptible to enzymatic degradation and can be remodeled under pathological conditions. Such remodeling may expose cryptic epitopes relevant to autoimmune recognition [2,4].
Antigenic properties and immune recognition
In simple terms: The non-collagenous proteins of the basement membrane can be recognized by the immune system as targets, which is important in autoimmune diseases.
A non-collagenous reticulin component of normal connective tissue was shown to possess antigenic properties. In anti-glomerular basement membrane disease, autoantibodies target non-collagenous epitopes within the basement membrane [2,4]. The immunology of anti-GBM disease highlights the clinical importance of immune recognition of this compartment.
Key Genes Involved in GO:0140144 non-collagenous component of basement membrane
The following genes and proteins are experimentally and clinically associated with the non-collagenous component of the basement membrane (GO:0140144) based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| LAMA1 | Laminin subunit alpha-1, a core non-collagenous glycoprotein of basement membrane | Laminin-induced signaling in tumor cells |
| LAMB1 | Laminin subunit beta-1, forms laminin heterotrimers in basement membrane | Component of non-collagenous compartment |
| LAMC1 | Laminin subunit gamma-1, essential for laminin assembly | Non-collagenous basement membrane glycoprotein |
| NID1 | Nidogen-1, bridges laminin and collagen IV networks | Non-collagenous component of basement membrane |
| NID2 | Nidogen-2, alternative bridging glycoprotein | Non-collagenous component of basement membrane |
| COL4A3 | Collagen IV alpha-3 chain; non-collagenous domains have functional roles | Target antigen in anti-GBM disease |
| COL4A4 | Collagen IV alpha-4 chain; contains non-collagenous domains | Anti-GBM disease antigen |
| COL4A5 | Collagen IV alpha-5 chain; non-collagenous domain functions | Anti-GBM disease antigen |
| HSPG2 | Perlecan, a heparan sulfate proteoglycan of basement membrane | Non-collagenous matrix component |
| AGRN | Agrin, a heparan sulfate proteoglycan in basement membrane | Non-collagenous component |
| FN1 | Fibronectin, adhesive glycoprotein in basement membrane | Non-collagenous matrix protein |
| MMP2 | Matrix metalloproteinase-2, degrades non-collagenous basement membrane proteins | Proteolytic remodeling |
| MMP9 | Matrix metalloproteinase-9, degrades basement membrane components | Proteolytic remodeling |
| CROT | Crotalus atrox venom metalloproteinase Ht-e | Digests non-collagenous basement membrane proteins |
| PLG | Plasminogen, precursor of plasmin that degrades matrix | Proteolytic remodeling |
| ITGB1 | Integrin beta-1, receptor for laminins and other matrix proteins | Laminin-induced signaling |
| ITGA6 | Integrin alpha-6, laminin receptor | Laminin-induced signaling |
| DAG1 | Dystroglycan, laminin receptor in basement membrane | Non-collagenous matrix interaction |
How Is non-collagenous component of basement membrane Regulated?
The non-collagenous component of the basement membrane is regulated at multiple levels, including gene expression, proteolytic processing, and immune recognition. Proteolytic digestion by metalloproteinases such as Ht-e from Crotalus atrox venom can degrade non-collagenous basement membrane proteins, indicating that enzymatic activity controls the integrity of this compartment. Non-collagenous domains of basement membrane collagens can be released and act as independent functional modules, suggesting that proteolytic cleavage regulates their activity. In anti-glomerular basement membrane disease, autoantibody binding to non-collagenous epitopes is a key regulatory event in disease initiation and progression [2,4]. Genetic background strongly influences experimental autoimmune anti-GBM glomerulonephritis, demonstrating that host genetics regulate immune responses to non-collagenous basement membrane antigens. The three-dimensional distribution of basement membrane components is altered in dystrophic recessive epidermolysis bullosa, indicating that disease-specific mechanisms regulate the organization of this compartment.
non-collagenous component of basement membrane and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| COL4A3 | Anti-glomerular basement membrane disease | Knockout mouse or point-mutation knock-in of non-collagenous domain |
| COL4A4 | Anti-GBM disease antigen | Knock-in of human epitope for autoantibody studies |
| COL4A5 | Anti-GBM disease antigen | Knockout and rescue with non-collagenous domain |
| LAMA1 | Tumor cell signaling | Overexpression and knockout in cancer cell lines |
| NID1 | Basement membrane assembly | Knockout mouse to study non-collagenous network |
Anti-glomerular basement membrane disease
Anti-glomerular basement membrane (anti-GBM) disease is an autoimmune disorder in which autoantibodies target non-collagenous epitopes within the basement membrane, leading to rapidly progressive glomerulonephritis and pulmonary hemorrhage [2,4]. The immunology of anti-GBM disease has been extensively studied, and the non-collagenous component of the basement membrane is a central antigenic target. Molecular characterization of the target antigens has identified non-collagenous domains of collagen IV as key autoantigens. Genetic background influences the development of experimental autoimmune anti-GBM glomerulonephritis, highlighting the role of host genetics in disease susceptibility.
Cancer and tumor cell signaling
Laminins within the non-collagenous component of the basement membrane can induce intracellular signaling in tumor cells, promoting adhesion, migration, and survival. This signaling is mediated through interactions with cell surface receptors such as integrins. The non-collagenous compartment therefore represents a potential therapeutic target in cancer, as disrupting laminin-induced signaling may reduce tumor progression.
Epidermolysis bullosa and skin fragility
In dystrophic recessive epidermolysis bullosa, the three-dimensional distribution of basement membrane components is altered, affecting the non-collagenous network. This disruption contributes to skin fragility and blistering. Understanding the organization of non-collagenous proteins in this disease may inform therapeutic strategies.
Matrix remodeling and proteolysis
Proteolytic digestion of non-collagenous basement membrane proteins by metalloproteinases such as Ht-e from Crotalus atrox venom demonstrates that this compartment is dynamically remodeled. Such remodeling can expose cryptic epitopes and contribute to autoimmune responses [2,4]. Non-collagenous domains of basement membrane collagens also have independent functional roles that may be modulated by proteolysis.
From non-collagenous component of basement membrane-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a non-collagenous basement membrane protein disrupt tissue architecture? | Knockout cell model or mouse |
| Does a specific point mutation in a non-collagenous domain alter autoantibody binding? | Point-mutation knock-in |
| Can a tagged non-collagenous protein be tracked in live cells? | Tagged knock-in (e.g., GFP) |
| Does overexpression of laminin enhance tumor cell signaling? | Overexpression cell model |
| Which genes modify susceptibility to anti-GBM disease? | Genetic mapping in inbred mouse strains |
| How does proteolytic cleavage affect non-collagenous protein function? | In vitro digestion with metalloproteinases |
How to Study the non-collagenous component of basement membrane Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Mass spectrometry | Protein composition and post-translational modifications | Mapping non-collagenous basement membrane proteome |
| Immunofluorescence | Spatial distribution of proteins | Tissue localization in epidermolysis bullosa |
| Cell adhesion assay | Integrin-mediated attachment to laminins | Tumor cell signaling studies |
| ELISA | Autoantibody levels against non-collagenous domains | Anti-GBM disease diagnosis |
| Western blot | Protein expression and phosphorylation | Signaling pathway analysis |
| Zymography | Proteolytic activity of metalloproteinases | Matrix remodeling studies |
| Epitope mapping | Antibody binding sites | Characterization of autoantigens |
| Knockout mouse models | Gene function in vivo | Basement membrane assembly studies |
Proteomics and mass spectrometry
Mass spectrometry-based proteomics can identify and quantify non-collagenous basement membrane proteins in tissue extracts. This approach is useful for mapping the composition of GO:0140144 in health and disease. Proteolytic digestion products can also be detected by mass spectrometry after metalloproteinase treatment.
Immunohistochemistry and imaging
Immunohistochemistry and immunofluorescence can visualize the three-dimensional distribution of non-collagenous basement membrane components in tissue sections. These methods are essential for assessing changes in dystrophic recessive epidermolysis bullosa and other matrix disorders. Co-staining with collagen IV helps distinguish the non-collagenous compartment from the collagenous scaffold.
Cell adhesion and signaling assays
Cell adhesion assays using purified laminins or other non-collagenous matrix proteins can measure integrin-mediated attachment. Downstream signaling can be assessed by Western blot for phosphorylated focal adhesion kinase and other pathways. These assays are widely used to study laminin-induced signaling in tumor cells.
Autoantibody detection and epitope mapping
ELISA and immunoblotting with recombinant non-collagenous domains can detect autoantibodies in anti-GBM disease [2,4]. Epitope mapping using truncated or mutated proteins identifies the exact binding sites. These methods are critical for diagnosing and monitoring autoimmune basement membrane diseases.
How CRISPR Can Be Used to Study GO:0140144 non-collagenous component of basement membrane
Knockout
CRISPR knockout of genes encoding non-collagenous basement membrane proteins, such as LAMA1 or NID1, can reveal their essential roles in basement membrane assembly and tissue integrity. Knockout cell models are useful for studying the loss of specific glycoproteins and the resulting compensatory changes. In vivo knockout mouse models can model aspects of basement membrane-related diseases.
Point Mutation
Point-mutation knock-in using CRISPR can introduce disease-associated mutations into non-collagenous domains of basement membrane proteins, such as COL4A3 or COL4A4. These models help determine whether specific amino acid changes alter autoantibody binding or protein function. Point mutations can also be used to dissect signaling motifs in laminin subunits.
Knock-in
Knock-in of tags such as GFP or luciferase into endogenous non-collagenous basement membrane genes allows real-time tracking of protein localization and dynamics. Knock-in of human epitopes into mouse models can facilitate studies of autoantibody-mediated disease. This approach preserves endogenous regulatory elements and provides physiologically relevant expression.
Overexpression
CRISPR-mediated overexpression or cDNA overexpression of non-collagenous basement membrane proteins, such as laminins, can model their elevated levels in cancer and fibrosis. Overexpression studies can identify downstream signaling pathways activated by laminin-integrin interactions. These models are valuable for testing therapeutic inhibitors of matrix signaling.
How EDITGENE Supports non-collagenous component of basement membrane Research
Researchers studying non-collagenous component of basement membrane-related genes often need to determine whether a candidate gene is causally involved in matrix assembly, signaling, or autoimmune recognition. EDITGENE provides a comprehensive suite of CRISPR-based services to enable such functional studies with high precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for non-collagenous component of basement membrane research.
Frequently Asked Questions About non-collagenous component of basement membrane
What is GO:0140144?
GO:0140144 is the Gene Ontology term for the non-collagenous component of basement membrane, defined as the non-collagenous compartment of the solid phase in basement membrane ECM, including glycoproteins like laminins or nidogens.
What genes are involved in non-collagenous component of basement membrane?
Key genes include laminin subunits (LAMA1, LAMB1, LAMC1), nidogens (NID1, NID2), and non-collagenous domains of collagen IV chains (COL4A3, COL4A4, COL4A5) [1,4].
What is the function of non-collagenous component of basement membrane?
It provides a glycoprotein-based adhesive and signaling platform that mediates cell adhesion, migration, and intracellular signaling, and is a target in autoimmune diseases [1,5].
How is non-collagenous component of basement membrane related to disease?
It is the target of autoantibodies in anti-glomerular basement membrane disease and is altered in dystrophic recessive epidermolysis bullosa [2,4,6].
What proteins are in the non-collagenous component of basement membrane?
Laminins, nidogens, perlecan, agrin, and non-collagenous domains of collagen IV are among the proteins in this compartment.
Can non-collagenous basement membrane proteins be degraded by enzymes?
Yes, metalloproteinases such as Ht-e from Crotalus atrox venom can proteolytically digest non-collagenous basement membrane proteins.
What is the role of laminins in the non-collagenous component of basement membrane?
Laminins are major glycoproteins that can induce intracellular signaling in tumor cells and mediate cell adhesion.
How do researchers study the non-collagenous component of basement membrane?
Common methods include mass spectrometry, immunofluorescence, cell adhesion assays, and CRISPR knockout models [1,5,6].
What is anti-glomerular basement membrane disease?
It is an autoimmune disease where autoantibodies bind non-collagenous epitopes in the glomerular basement membrane, causing kidney and lung damage [2,4].
Why is genetic background important in anti-GBM disease models?
Strain differences in experimental autoimmune anti-GBM glomerulonephritis show that host genetics strongly influence susceptibility and disease severity.
Conclusion
GO:0140144, non-collagenous component of basement membrane, represents a functionally diverse and clinically important compartment of the extracellular matrix. It includes laminins, nidogens, and other glycoproteins that mediate cell adhesion and signaling, and it is a key target in autoimmune and genetic diseases [1,2,4,5]. Understanding its composition, regulation, and role in disease requires integrated approaches including proteomics, imaging, and CRISPR-based functional studies [1,3,6]. EDITGENE provides the tools and services to accelerate research on this critical matrix compartment.
References
- 1. Ortega N et al.. 2002. New functional roles for non-collagenous domains of basement membrane collagens.. J Cell Sci 115(Pt 22):4201-14 PMID: 12376553
- 2. Salama AD et al.. 2002. Immunology of anti-glomerular basement membrane disease.. Curr Opin Nephrol Hypertens 11(3):279-86 PMID: 11981257
- 3. Baramova EN et al.. 1991. Proteolytic digestion of non-collagenous basement membrane proteins by the hemorrhagic metalloproteinase Ht-e from Crotalus atrox venom.. Biomed Biochim Acta 50(4-6):763-8 PMID: 1801753
- 4. Borza DB et al.. 2003. Molecular characterization of the target antigens of anti-glomerular basement membrane antibody disease.. Springer Semin Immunopathol 24(4):345-61 PMID: 12778332
- 5. Givant-Horwitz V et al.. 2005. Laminin-induced signaling in tumor cells.. Cancer Lett 223(1):1-10 PMID: 15890231
- 6. Muda AO et al.. 1996. Three-dimensional distribution of basement membrane components in dystrophic recessive epidermolysis bullosa.. J Pathol 179(4):427-31 PMID: 8869292
- 7. Reynolds J. 2011. Strain differences and the genetic basis of experimental autoimmune anti-glomerular basement membrane glomerulonephritis.. Int J Exp Pathol 92(3):211-7 PMID: 21342299
- 8. Pras M et al.. 1974. Antigenic properties of a non-collagenous reticulin component of normal connective tissue.. Immunology 27(3):469-78 PMID: 4137544
