GO:0140367 antibacterial innate immune response: Defense Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140367 antibacterial innate immune response is the germline-encoded defense response that directly recognizes bacterial components and coordinates bacterial killing.
• It integrates cellular bactericidal mechanisms such as itaconate-mediated lysosomal biogenesis and metabolic reprogramming in macrophages.
• The gut microbiota calibrates systemic antibacterial innate immunity and influences outcomes in sepsis and infection.
• Host antibacterial innate immune elements are correlated across species, indicating conserved evolutionary architecture.
• Invertebrate infection models such as Galleria mellonella provide tractable systems to dissect antibacterial innate immunity.
• CRISPR-based knockout, knock-in, and overexpression models enable causal testing of genes within this GO term.
Description
The Gene Ontology term GO:0140367 antibacterial innate immune response describes the germline-encoded host defense that directly recognizes bacterial components and mediates bacterial clearance. Unlike adaptive immunity, this response relies on invariant receptors and effector molecules that are pre-formed or rapidly induced, allowing immediate containment of bacterial challenge. The term is a biological_process child of defense response and is distinct from antibacterial humoral response and antibacterial adaptive immunity.
antibacterial innate immune response At A Glance
| GO ID | GO:0140367 |
|---|---|
| GO term | antibacterial innate immune response |
| Ontology | biological_process |
| Synonym | none |
| Major function | Germline-encoded recognition and killing of bacteria |
| Parent term | defense response |
| Related process | innate immune response |
| Taxonomic scope | Metazoa |
| Definition source | QuickGO |
What Is GO:0140367?
In our own words, GO:0140367 encompasses all molecular and cellular events by which an organism's innate immune system detects and eliminates bacteria. It includes recognition of bacterial ligands by germline-encoded sensors, signal transduction, and effector functions such as phagocytosis, lysosomal degradation, and production of antimicrobial metabolites.
Why Is antibacterial innate immune response Important in Cell Biology?
Understanding GO:0140367 is critical because dysregulated antibacterial innate immunity contributes to sepsis, chronic infection, and inflammatory pathology, and because this pathway is the first line of defense before adaptive immunity develops.
• Provides immediate host protection against bacterial pathogens.
• Shapes sepsis outcomes through microbiota-immune crosstalk.
• Involves metabolic effectors such as itaconate that regulate lysosomal killing.
• Is conserved across diverse ungulate species, enabling comparative studies.
• Can be modeled in invertebrates like Galleria mellonella for drug testing.
• Is modulated by antibiotics via microbiota-brain communication.
• Underpins vaccine adjuvant and infection-treatment strategies.
• Offers targets for host-directed antibacterial therapies.
• Requires precise genetic models to separate cause from correlation.
• Connects innate and adaptive arms during infection resolution.
What Happens During antibacterial innate immune response?
Bacterial recognition by germline-encoded sensors
In simple terms: The body has fixed detectors that spot bacteria immediately.
Innate immune cells express pattern-recognition receptors that bind bacterial components such as lipopolysaccharide and peptidoglycan, initiating signaling cascades that define GO:0140367.
Metabolic reprogramming and itaconate production
In simple terms: Immune cells change their metabolism to make bacteria-killing molecules.
Upon bacterial challenge, macrophages upregulate itaconate production, which acts as a lysosomal inducer to promote antibacterial innate immunity. ABCG2 exports itaconate and thereby limits this response by alleviating TFEB-dependent lysosomal biogenesis.
Lysosomal biogenesis and bacterial degradation
In simple terms: Cells build more acid bags to digest bacteria.
TFEB-dependent lysosomal biogenesis is a key effector arm of GO:0140367, and its regulation by itaconate flux determines bacterial killing capacity.
Microbiota-immune calibration
In simple terms: Gut bacteria tune how ready the immune system is.
The gut microbiota influences systemic antibacterial innate immunity, and disruption by antibiotics alters host defense via microbiota-brain communication.
Integration with adaptive immunity
In simple terms: The fast response helps the slow, specific response work better.
Collaborative innate-adaptive immune responses enhance infection treatment efficacy, showing that GO:0140367 is not isolated but primes downstream adaptive mechanisms.
Key Genes Involved in GO:0140367 antibacterial innate immune response
The following genes and proteins are experimentally implicated in GO:0140367 antibacterial innate immune response.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ABCG2 | Itaconate exporter limiting lysosomal biogenesis | Knockout increases antibacterial immunity |
| TFEB | Master regulator of lysosomal biogenesis | Overexpression boosts bacterial killing |
| IRG1 | Produces itaconate from cis-aconitate | Knockout reduces antibacterial innate immunity |
| TLR4 | Recognizes lipopolysaccharide | Point mutations alter bacterial sensing |
| MYD88 | Adaptor for TLR signaling | Knockout impairs innate antibacterial response |
| NOD2 | Cytosolic peptidoglycan sensor | Knock-in models test Crohn's variants |
| NFKB1 | Transcription factor for inflammatory genes | Overexpression enhances antibacterial effectors |
| IL1B | Pro-inflammatory cytokine | Knockout reduces bacterial clearance |
| TNF | Cytokine amplifying innate immunity | Knock-in reporters track expression |
| CAMP | Antimicrobial peptide | Overexpression increases killing |
| LYZ | Lysozyme degrading bacterial cell walls | Knockout reduces bactericidal activity |
| NOS2 | Produces nitric oxide | Knockout impairs bacterial killing |
| CYBB | NADPH oxidase component | Point mutations cause chronic granulomatous disease |
| ATG5 | Autophagy machinery | Knockout affects bacterial degradation |
| SQSTM1 | Autophagy receptor | Knock-in tags track bacteria |
| MAP1LC3B | Autophagosome marker | Overexpression monitors flux |
| GAL3 | Galectin-3 in antibacterial defense | Correlates with innate elements |
How Is antibacterial innate immune response Regulated?
GO:0140367 is regulated by metabolic and transcriptional circuits. Itaconate levels controlled by IRG1 and ABCG2 modulate TFEB-dependent lysosomal biogenesis, thereby tuning antibacterial capacity. Microbiota-derived signals also calibrate systemic innate immunity, and antibiotic exposure can disrupt this regulation.
antibacterial innate immune response and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CYBB | Chronic granulomatous disease | Knockout macrophage |
| ABCG2 | Itaconate export and lysosomal limitation | Knockout mouse |
| IRG1 | Itaconate production | Knockout macrophage |
| TLR4 | Sepsis susceptibility | Point-mutation knock-in |
| NOD2 | Crohn's disease | Knock-in organoid |
Sepsis and systemic infection
Dysregulated antibacterial innate immunity contributes to sepsis pathogenesis, and the gut microbiota modulates this risk.
Chronic granulomatous disease
Defects in NADPH oxidase components such as CYBB impair bacterial killing, illustrating the clinical importance of GO:0140367.
Antibiotic-associated immune dysregulation
Antibiotics can trigger host innate immune responses via microbiota-brain communication, linking microbial perturbation to altered antibacterial immunity.
From antibacterial innate immune response-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X limit antibacterial innate immunity? | Knockout cell line |
| Does variant Y alter bacterial sensing? | Point-mutation knock-in |
| Can tagged protein track lysosomal recruitment? | Tagged knock-in |
| Does overexpression enhance killing? | Overexpression stable line |
| Which genes are essential in macrophages? | CRISPR library screening |
| What pathways change upon infection? | RNA-seq and bioinformatics |
How to Study the antibacterial innate immune response Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Transcriptome changes | Identify GO:0140367 regulators |
| Proteomics | Protein abundance and modifications | Map effector networks |
| Metabolomics | Itaconate and metabolites | Quantify metabolic arm |
| Live-cell imaging | Phagosome-lysosome fusion | Assess bacterial killing |
| CRISPR screen | Gene essentiality | Discover new antibacterial genes |
| Galleria model | In vivo survival | Test antibacterial drugs |
| Single-cell epigenomics | Chromatin accessibility | Define immune cell states |
Transcriptomic profiling
RNA-seq of infected versus control cells reveals gene expression changes within GO:0140367 and identifies candidate regulators.
Metabolite and flux analysis
Mass spectrometry measures itaconate and related metabolites to quantify metabolic arms of antibacterial innate immunity.
Imaging of bacterial killing
Fluorescence microscopy tracks phagosome-lysosome fusion and bacterial degradation in live cells.
Invertebrate infection models
Galleria mellonella larvae allow rapid in vivo testing of antibacterial innate immune function and drug efficacy.
How CRISPR Can Be Used to Study GO:0140367 antibacterial innate immune response
Knockout
CRISPR knockout of ABCG2 or IRG1 in macrophages increases or decreases antibacterial innate immunity, respectively, providing causal evidence for GO:0140367.
Point Mutation
Point mutations in TLR4 or CYBB can be introduced to model human variants that alter bacterial sensing or killing.
Knock-in
Knock-in of fluorescent tags at endogenous loci enables tracking of TFEB or LC3 during bacterial challenge.
Overexpression
Overexpression of TFEB or antimicrobial peptides enhances bacterial clearance, validating their role in GO:0140367.
How EDITGENE Supports antibacterial innate immune response Research
Researchers studying antibacterial innate immune response-related genes often need to determine whether a candidate gene is causally involved in bacterial recognition, metabolic reprogramming, or lysosomal killing. EDITGENE provides the full suite of CRISPR models to move from correlation to causation.
Contact EDITGENE today to design your custom CRISPR model for antibacterial innate immune response research.
Frequently Asked Questions About antibacterial innate immune response
What is GO:0140367 antibacterial innate immune response?
It is the germline-encoded defense response that directly recognizes and kills bacteria.
What genes are involved in antibacterial innate immune response?
Key genes include ABCG2, IRG1, TFEB, TLR4, MYD88, NOD2, and CYBB.
How is itaconate related to antibacterial innate immunity?
Itaconate is a lysosomal inducer that promotes bacterial killing, and ABCG2 exports it to limit this response.
What diseases involve defective antibacterial innate immunity?
Sepsis, chronic granulomatous disease, and Crohn's disease are linked to defects in this pathway.
How can I study antibacterial innate immunity in the lab?
Use RNA-seq, metabolomics, live-cell imaging, and CRISPR models.
What is the role of microbiota in antibacterial innate immunity?
The gut microbiota calibrates systemic innate immunity and influences sepsis outcomes.
Can antibiotics affect antibacterial innate immunity?
Yes, antibiotics can trigger host innate immune responses via microbiota-brain communication.
What animal models exist for antibacterial innate immunity?
Galleria mellonella and mouse models are widely used.
How do I choose a CRISPR model for antibacterial immunity genes?
Select knockout for loss-of-function, knock-in for tagging, and overexpression for gain-of-function.
Is antibacterial innate immunity conserved across species?
Yes, multiple innate antibacterial defense elements are correlated across ungulate species.
Conclusion
GO:0140367 antibacterial innate immune response is a central, germline-encoded defense program that integrates bacterial recognition, metabolic reprogramming, and lysosomal killing. Its dysregulation contributes to sepsis and immunodeficiency, making it a high-value target for host-directed therapies. CRISPR-based models from EDITGENE enable precise causal dissection of this pathway.
References
- 1. Haak BW et al.. 2017. The role of the gut microbiota in sepsis.. Lancet Gastroenterol Hepatol 2(2):135-143 PMID: 28403983
- 2. Wu Y et al.. 2024. Antibiotics Trigger Host Innate Immune Response via Microbiota-Brain Communication in C. elegans.. Int J Mol Sci 25(16) PMID: 39201552
- 3. Chen C et al.. 2024. ABCG2 is an itaconate exporter that limits antibacterial innate immunity by alleviating TFEB-dependent lysosomal biogenesis.. Cell Metab 36(3):498-510.e11 PMID: 38181789
- 4. Wimmers F et al.. 2021. The single-cell epigenomic and transcriptional landscape of immunity to influenza vaccination.. Cell 184(15):3915-3935.e21 PMID: 34174187
- 5. Chen L et al.. 2024. An On-Demand Collaborative Innate-Adaptive Immune Response to Infection Treatment.. Adv Mater 36(15):e2304774 PMID: 37523329
- 6. Zhang Z et al.. 2022. Itaconate is a lysosomal inducer that promotes antibacterial innate immunity.. Mol Cell 82(15):2844-2857.e10 PMID: 35662396
- 7. Tsai CJ et al.. 2016. Galleria mellonella infection models for the study of bacterial diseases and for antimicrobial drug testing.. Virulence 7(3):214-29 PMID: 26730990
- 8. Dugovich BS et al.. 2019. Multiple innate antibacterial immune defense elements are correlated in diverse ungulate species.. PLoS One 14(11):e0225579 PMID: 31774834
