GO:0044218 other organism cell membrane: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0044218 (other organism cell membrane) is a cellular_component term defined as the cell membrane of a secondary organism with which the first organism is interacting.
• It is a relational/interface term: it describes the membrane of the interacting partner organism, not the membrane of the organism being annotated.
• The term is widely used in host-pathogen and symbiosis research, where the host cell encounters the membrane of a bacterium, parasite, or other organism.
• Bacterial membranes are asymmetric lipid bilayers with diverse lipid chemistries and permeability barriers that determine host interaction outcomes.
• Studying this interface requires imaging, proteomics, lipidomics, and CRISPR-based perturbation of both host and interacting organism.
• EDITGENE provides knockout, point-mutation, knock-in, overexpression cell models and CRISPR library screening to dissect other organism cell membrane biology.
Description
GO:0044218, other organism cell membrane, is a Gene Ontology cellular_component term that captures the cell membrane of a secondary organism with which the first organism is interacting. In practice, this means that when a host cell, immune cell, or plant cell engages a bacterium, parasite, or fungal partner, the membrane of that partner is annotated as an other organism cell membrane. The term is inherently relational: it is not the membrane of the annotated organism itself, but the membrane of the interacting counterpart. This distinction is essential for accurate annotation of host-pathogen and symbiosis datasets. The bacterial outer membrane is a selective permeability barrier whose molecular basis has been reviewed in detail, and bacterial membrane lipids show remarkable structural diversity across species. Because the interacting membrane is often the first point of contact, its composition and dynamics shape downstream signaling, uptake, and immune recognition. Researchers studying infection, symbiosis, and inter-kingdom communication therefore need robust tools to perturb and visualize this interface.
other organism cell membrane At A Glance
| GO ID | GO:0044218 |
|---|---|
| GO term | other organism cell membrane |
| Ontology | cellular_component |
| Synonym | foreign membrane; other organism membrane |
| Major function | Defines the membrane of an interacting partner organism at a host-pathogen or symbiosis interface |
| Definition | The cell membrane of a secondary organism with which the first organism is interacting |
| Relational scope | Applies only when two organisms interact; not the membrane of the annotated organism |
| Typical research context | Host-pathogen interaction, symbiosis, immune recognition, membrane permeability |
| Related cellular components | Plasma membrane, outer membrane, host cell membrane |
What Is GO:0044218?
In our own words, GO:0044218 describes the plasma membrane of a second organism that is physically or functionally interacting with a first organism. It is a cellular_component term used when the membrane being described belongs to the interacting partner rather than to the organism under study. Synonyms include foreign membrane and other organism membrane. The term is intentionally relational: it only applies in the context of an interaction between two organisms, such as a host and a pathogen, or a plant and a microbe.
Why Is other organism cell membrane Important in Cell Biology?
GO:0044218 matters because the membrane of an interacting organism is often the decisive interface in infection, symbiosis, and immune recognition. The bacterial outer membrane is a permeability barrier whose molecular basis determines which molecules can enter or leave the cell, and bacterial membrane lipids are structurally diverse across species. Because these membranes are the first contact point between organisms, their composition influences adhesion, secretion, and host signaling. Accurate annotation of other organism cell membrane therefore supports reproducible comparative studies of host-microbe interactions and helps researchers design targeted perturbations of the interacting partner.
• Defines the membrane of the interacting partner organism in host-pathogen studies.
• Supports accurate annotation of infection and symbiosis datasets.
• Bacterial outer membrane permeability is a key determinant of host interaction.
• Bacterial membrane lipid diversity affects membrane properties and recognition.
• Relevant to immune recognition of foreign membranes and cell-surface antigens.
• Relevant to membrane-permeabilizing peptides and antimicrobial strategies.
• Relevant to long-distance cell-to-cell connections such as membrane nanotubes.
• Relevant to plant cell wall-plasma membrane attachments and stress resilience.
• Helps distinguish host membrane from pathogen membrane in imaging and proteomics.
• Provides a controlled vocabulary anchor for cross-species interaction studies.
What Happens During other organism cell membrane?
Recognition and Contact
In simple terms: The host cell first recognizes and touches the membrane of the other organism.
During interaction, the first organism encounters the membrane of the second organism, and this contact is often mediated by surface molecules and membrane lipids. Bacterial membrane lipids are diverse in structure and pathway, which influences how the membrane is recognized. The bacterial outer membrane acts as a selective permeability barrier that controls the exchange of molecules at this interface. In plant systems, cell wall-plasma membrane attachments mediate stress resilience through cellulose synthase complexes and remorins, illustrating how membrane contacts are structurally reinforced.
Membrane Permeability and Exchange
In simple terms: Molecules move across the other organism membrane in a controlled way.
The other organism cell membrane regulates what enters and leaves the interacting partner. The molecular basis of bacterial outer membrane permeability has been reviewed extensively, showing that porins and lipid organization govern solute flux. Membrane-permeabilizing peptides can disrupt this barrier, and their mechanisms have been mapped in detail. These permeability properties determine whether host-derived molecules, antibiotics, or immune effectors can reach the interacting organism.
Signaling Across the Interface
In simple terms: Signals pass between the two organisms across the membrane interface.
Contact between organisms triggers signaling that can alter both partners. Long-distance cell-to-cell connections such as membrane nanotubes can transmit signals between cells. Connexin biology illustrates the diversity of membrane channels that mediate intercellular communication. At the host-pathogen interface, these signaling events can shape immune responses and metabolic exchange.
Immune Recognition of Foreign Membranes
In simple terms: The host immune system can detect the other organism membrane as foreign.
Foreign membranes carry antigens that can be recognized by the host immune system. Combined immunodeficiency associated with absence of cell-surface HLA-A and -B antigens illustrates how loss of surface antigen presentation affects immune function. This principle is relevant to how host cells distinguish self from other organism membranes during infection.
Key Genes Involved in GO:0044218 other organism cell membrane
The following genes and proteins are commonly studied in the context of other organism cell membrane biology, including bacterial membrane components, host recognition factors, and membrane interface regulators.
| Gene | Major Role | Research Relevance |
|---|---|---|
| OmpA | Outer membrane protein in Gram-negative bacteria | Model for outer membrane permeability and host interaction |
| OmpC | Porin in bacterial outer membrane | Studied for solute flux and permeability |
| OmpF | Porin in bacterial outer membrane | Studied for antibiotic and solute permeability |
| LptD | Lipopolysaccharide transport to outer membrane | Outer membrane biogenesis and barrier function |
| BamA | Outer membrane protein assembly | Outer membrane protein folding and insertion |
| LpxA | Lipid A biosynthesis | Membrane lipid diversity and recognition |
| LpxD | Lipid A biosynthesis | Membrane lipid diversity and recognition |
| CLS1 | Cardiolipin synthase | Bacterial membrane lipid diversity |
| PgsA | Phosphatidylglycerol synthesis | Bacterial membrane lipid pathways |
| HLA-A | Cell-surface antigen presentation | Immune recognition of foreign membranes |
| HLA-B | Cell-surface antigen presentation | Immune recognition of foreign membranes |
| GJA1 | Connexin 43 gap junction channel | Intercellular membrane communication |
| GJB1 | Connexin 32 gap junction channel | Intercellular membrane communication |
| CESA | Cellulose synthase complex | Plant cell wall-plasma membrane attachment |
| REMORIN | Membrane microdomain protein | Plant membrane attachment and stress resilience |
| HNF4A | Hepatocyte polarity regulator | Membrane domain organization in polarized cells |
| MECP2 | Membrane nanotube-associated signaling | Long-distance cell-to-cell connection |
How Is other organism cell membrane Regulated?
Regulation of other organism cell membrane biology is context-dependent. Bacterial outer membrane permeability is regulated by porin expression and lipid composition, and bacterial membrane lipid pathways are controlled by diverse biosynthetic enzymes. In plant systems, cell wall-plasma membrane attachments are regulated by cellulose synthase complexes and remorins, which mediate stress resilience. Hepatocyte polarity regulators such as HNF4A control membrane domain organization in polarized cells. Connexin channels are regulated by diverse gating and trafficking mechanisms. Membrane-permeabilizing peptides can also modulate membrane integrity.
other organism cell membrane and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| HLA-A | Combined immunodeficiency with absent HLA-A and -B | Knockout in immune cell lines |
| HLA-B | Combined immunodeficiency with absent HLA-A and -B | Knockout in immune cell lines |
| HNF4A | Hepatocyte polarity and liver function | Knockout in hepatocyte models |
| CESA | Plant cell wall-plasma membrane attachment and stress resilience | Knockout in plant cell lines |
| GJA1 | Connexin-related intercellular communication | Knockout in mammalian cell lines |
Host-Pathogen Infection
The other organism cell membrane is central to infection because it is the interface where pathogens interact with host cells. Bacterial outer membrane permeability determines susceptibility to antibiotics and host effectors. Membrane lipid diversity across bacterial species affects recognition and resistance. Membrane-permeabilizing peptides are studied as antimicrobial strategies that target this interface.
Immune Deficiency and Antigen Presentation
Absence of cell-surface HLA-A and -B antigens causes combined immunodeficiency, illustrating how foreign membrane recognition and antigen presentation are essential for immune defense. This links other organism cell membrane biology to primary immunodeficiency and immune recognition.
Tissue Polarity and Membrane Organization
Hepatocyte polarity depends on precise membrane domain organization, and disruption of polarity regulators affects liver function. This shows that membrane organization principles relevant to other organism cell membrane also apply to host tissue architecture.
Plant Stress Resilience
Plant cell wall-plasma membrane attachments mediate stress resilience through cellulose synthase complexes and remorins. These attachments are relevant to how plants interact with microbial partners and environmental stress.
From other organism cell membrane-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a bacterial outer membrane protein control permeability? | Knockout of OmpA/OmpC/OmpF in bacterial strains |
| How do membrane lipids affect host recognition? | Point mutation in lipid biosynthesis genes such as LpxA |
| Can a host receptor be tagged to visualize the interface? | Tagged knock-in of host membrane receptor |
| Does overexpression of a membrane protein alter interaction? | Overexpression cell model in host or pathogen |
| Which host genes regulate recognition of foreign membranes? | CRISPR library screening in host cells |
| How do plant membrane attachments respond to stress? | Knockout of CESA or REMORIN in plant models |
How to Study the other organism cell membrane Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Fluorescence microscopy | Membrane contact and localization | Visualizing host-pathogen interface |
| Electron microscopy | Ultrastructure of membranes | Membrane architecture studies |
| Proteomics | Protein composition of membranes | Outer membrane protein profiling |
| Lipidomics | Lipid composition and diversity | Bacterial membrane lipid analysis |
| Permeability assay | Solute flux across membrane | Antibiotic uptake studies |
| CRISPR knockout | Gene function loss | Testing membrane gene necessity |
| CRISPR library screening | Genome-wide fitness | Host factors for membrane recognition |
Imaging the Interface
Fluorescence and electron microscopy can visualize contact between host and other organism membranes. Membrane nanotubes and long-distance connections can be imaged to study intercellular communication. Connexin channels can be visualized to assess membrane communication.
Proteomics and Lipidomics
Mass spectrometry-based proteomics and lipidomics can characterize the protein and lipid composition of the other organism cell membrane. Bacterial membrane lipid diversity has been mapped using such approaches. Outer membrane protein composition can be analyzed to understand permeability.
Permeability Assays
Permeability assays measure the flux of solutes and antibiotics across the other organism membrane. The molecular basis of bacterial outer membrane permeability provides a framework for these assays. Membrane-permeabilizing peptides can be tested in these systems.
Genetic Perturbation
CRISPR knockout, point mutation, knock-in, and overexpression can perturb genes involved in other organism cell membrane biology. These approaches enable causal testing of membrane components in host-pathogen interaction.
How CRISPR Can Be Used to Study GO:0044218 other organism cell membrane
Knockout
CRISPR knockout can delete genes encoding membrane components in the interacting organism or host recognition factors. For example, knocking out porin genes such as OmpA, OmpC, or OmpF can test their role in outer membrane permeability. Knockout of lipid biosynthesis genes can reveal effects on membrane lipid diversity.
Point Mutation
Point mutation can introduce specific amino acid changes in membrane proteins to test structure-function relationships. This is useful for studying porin selectivity and lipid enzyme active sites. Point mutations can also model disease-associated variants in host membrane proteins.
Knock-in
Knock-in can add tags or reporters to membrane proteins to visualize the other organism cell membrane interface. Tagged knock-in of host receptors or pathogen membrane proteins enables live imaging. Knock-in of disease variants can model immune deficiency.
Overexpression
Overexpression can increase levels of membrane proteins to study their effects on interaction and permeability. Overexpression of porins can alter outer membrane permeability. Overexpression of membrane-attachment proteins can affect plant stress resilience.
How EDITGENE Supports other organism cell membrane Research
Researchers studying other organism cell membrane-related genes often need to determine whether a candidate gene is causally involved in membrane interaction, permeability, or recognition. EDITGENE provides publication-ready CRISPR cell models and screening services to test these hypotheses rigorously.
Contact EDITGENE today to design your custom CRISPR model for other organism cell membrane research.
Frequently Asked Questions About other organism cell membrane
What is GO:0044218 other organism cell membrane?
GO:0044218 is a Gene Ontology cellular_component term defined as the cell membrane of a secondary organism with which the first organism is interacting.
What is the definition of other organism cell membrane?
It is the cell membrane of an interacting partner organism, also known as foreign membrane or other organism membrane.
What genes are involved in other organism cell membrane?
Genes include bacterial outer membrane proteins such as OmpA, OmpC, and OmpF, lipid biosynthesis genes such as LpxA, and host recognition genes such as HLA-A and HLA-B.
Why is other organism cell membrane important in infection?
It is the interface where pathogens contact host cells, and its permeability determines antibiotic and host effector access.
How is bacterial outer membrane permeability studied?
Permeability is studied using porin mutants, permeability assays, and proteomics, as reviewed in the molecular basis of bacterial outer membrane permeability.
What is the role of membrane lipids in other organism cell membrane?
Bacterial membrane lipids are structurally diverse and influence membrane properties and recognition.
How can CRISPR be used to study other organism cell membrane?
CRISPR knockout, point mutation, knock-in, and overexpression can perturb membrane genes in host or pathogen to test function.
What methods visualize the other organism cell membrane?
Fluorescence microscopy, electron microscopy, and membrane nanotube imaging can visualize the interface.
Is other organism cell membrane related to immune deficiency?
Yes, absence of cell-surface HLA-A and -B antigens causes combined immunodeficiency, linking foreign membrane recognition to immune defense.
What services does EDITGENE provide for other organism cell membrane research?
EDITGENE provides knockout, point-mutation, knock-in, overexpression cell models, CRISPR library screening, and bioinformatics services.
Conclusion
GO:0044218 other organism cell membrane is a relational cellular_component term that defines the membrane of an interacting partner organism. It is essential for accurate annotation of host-pathogen and symbiosis datasets, and it connects to bacterial outer membrane permeability, membrane lipid diversity, immune recognition, and intercellular communication. Researchers can dissect this interface using CRISPR knockout, point mutation, knock-in, overexpression, and library screening. EDITGENE offers end-to-end services to support these studies.
References
- 1. Nikaido H. 2003. Molecular basis of bacterial outer membrane permeability revisited.. Microbiol Mol Biol Rev 67(4):593-656 PMID: 14665678
- 2. Sohlenkamp C et al.. 2016. Bacterial membrane lipids: diversity in structures and pathways.. FEMS Microbiol Rev 40(1):133-59 PMID: 25862689
- 3. Rui Y et al.. 2026. Plant cell wall-plasma membrane attachments mediate stress resilience through cellulose synthase complexes and remorins.. Cell 189(16):5115-5134.e8 PMID: 42229423
- 4. Treyer A et al.. 2013. Hepatocyte polarity.. Compr Physiol 3(1):243-87 PMID: 23720287
- 5. Lucaciu SA et al.. 2023. Diversity in connexin biology.. J Biol Chem 299(11):105263 PMID: 37734551
- 6. Touraine JL et al.. 1978. Combined immunodeficiency disease associated with absence of cell-surface HLA-A and -B antigens.. J Pediatr 93(1):47-51 PMID: 650344
- 7. Guha S et al.. 2019. Mechanistic Landscape of Membrane-Permeabilizing Peptides.. Chem Rev 119(9):6040-6085 PMID: 30624911
- 8. Shen J et al.. 2019. [The biological functions of cell-to-cell connection over long distance--membrane nanotube].. Sheng Li Xue Bao 71(2):196-204 PMID: 31008479
