GO:0007031 peroxisome organization: Components, Assembly and Research Methods, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0007031 peroxisome organization describes the cellular process that assembles, arranges, and disassembles peroxisomes, small O2-using organelles that oxidize organic molecules.
• Peroxisome organization requires the coordinated action of PEX genes, which encode peroxins that mediate matrix protein import, membrane biogenesis, and organelle division.
• Peroxisomes interact dynamically with mitochondria, the endoplasmic reticulum, and lipid droplets, and these contacts are essential for lipid metabolism and redox balance.
• Defects in peroxisome organization cause peroxisomal biogenesis disorders such as Zellweger spectrum disorders, and are linked to neurodegeneration and cancer.
• Ether lipid synthesis, a key peroxisomal function, depends on proper peroxisome organization and supports membrane integrity and signaling.
• CRISPR-based knockout, knock-in, and overexpression models enable causal dissection of PEX gene function in peroxisome organization.
Description
Peroxisome organization (GO:0007031) is the biological process that ensures the assembly, arrangement, and disassembly of peroxisomes, which are small, membrane-bounded organelles that use dioxygen (O2) to oxidize organic molecules. This process is fundamental to cellular lipid metabolism, redox homeostasis, and the detoxification of reactive oxygen species. Peroxisomes are not static; they undergo dynamic changes in number, size, and protein composition in response to metabolic cues, and their biogenesis requires the import of matrix proteins and the expansion of the peroxisomal membrane. Researchers study peroxisome organization because its disruption leads to severe human diseases, including peroxisomal biogenesis disorders and contributions to neurodegeneration and cancer progression. The process is also emerging as a hub of organelle crosstalk, with peroxisomes forming membrane contact sites with mitochondria, the endoplasmic reticulum, and lipid droplets that coordinate lipid and redox metabolism. Understanding the molecular players and regulatory logic of peroxisome organization is therefore central to cell biology and translational medicine. This article integrates the QuickGO definition of GO:0007031 with verified PubMed literature to provide a research-grade overview of the mechanisms, key genes, disease links, and experimental models used to study peroxisome organization.
peroxisome organization At A Glance
| GO ID | GO:0007031 |
|---|---|
| GO term | peroxisome organization |
| Ontology | biological_process |
| Synonym | peroxisome organisation; peroxisome organization and biogenesis |
| Major function | Assembly, arrangement, and disassembly of peroxisomes, enabling O2-dependent oxidation of organic molecules |
| Key cellular context | Peroxisome biogenesis, matrix protein import, membrane remodeling, and organelle division |
| Related organelles | Mitochondria, endoplasmic reticulum, and lipid droplets via membrane contact sites |
| Disease relevance | Peroxisomal biogenesis disorders, neurodegeneration, and cancer metabolism |
What Is GO:0007031?
GO:0007031 peroxisome organization is defined by QuickGO as a process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of a peroxisome. A peroxisome is a small, membrane-bounded organelle that uses dioxygen (O2) to oxidize organic molecules. In practice, this term covers the biogenesis of peroxisomes from precursor membranes, the import of matrix and membrane proteins, the division and inheritance of peroxisomes, and the degradation or remodeling of peroxisomes under changing cellular conditions.
Why Is peroxisome organization Important in Cell Biology?
Peroxisome organization is important because peroxisomes are essential for lipid metabolism, including the synthesis of ether lipids and the oxidation of very-long-chain fatty acids, and for maintaining redox balance. When peroxisome organization fails, cells accumulate toxic metabolites and suffer membrane and signaling defects, which manifest in humans as peroxisomal biogenesis disorders and contribute to neurodegeneration and cancer. Moreover, peroxisomes participate in organelle interaction networks that integrate metabolic and stress signals, making peroxisome organization a key node in cellular adaptation.
• Peroxisome organization ensures the correct import of matrix enzymes required for fatty acid oxidation and ether lipid synthesis.
• It supports the dynamic remodeling of peroxisome number and size in response to metabolic and oxidative stress.
• Defects in peroxisome organization cause peroxisomal biogenesis disorders such as Zellweger spectrum disorders.
• Peroxisome organization is linked to cancer progression through effects on lipid metabolism and signaling.
• It enables organelle crosstalk with mitochondria, the endoplasmic reticulum, and lipid droplets.
• Ether lipid production, which depends on peroxisome organization, is critical for membrane structure and function.
• Peroxisome organization contributes to the detoxification of reactive oxygen species and xenobiotics.
• It is a target for CRISPR-based functional genomics to identify causal genes in metabolic and neurodegenerative diseases.
What Happens During peroxisome organization?
Peroxisome membrane biogenesis and growth
In simple terms: New peroxisomes start from membranes that grow and acquire the right proteins.
Peroxisome organization begins with the formation and expansion of the peroxisomal membrane, which involves the action of peroxins such as PEX3, PEX16, and PEX19 that facilitate membrane protein targeting and insertion. The endoplasmic reticulum contributes membrane material to nascent peroxisomes, and the peroxisomal membrane must be correctly assembled to support subsequent matrix protein import. Proteomic studies have identified a broad set of peroxisomal membrane and matrix proteins whose coordinated delivery is required for organelle function.
Matrix protein import
In simple terms: Enzymes are shipped into the peroxisome through a dedicated import machinery.
Matrix protein import is a hallmark of peroxisome organization and is mediated by PEX proteins that recognize peroxisomal targeting signals (PTS1 and PTS2) and translocate cargo across the membrane. This process requires cycling of receptor proteins and the assembly of a transient import pore, and its failure leads to empty or dysfunctional peroxisomes. The import machinery is dynamically regulated and is essential for the metabolic roles of peroxisomes, including fatty acid oxidation.
Peroxisome division and inheritance
In simple terms: Peroxisomes multiply by splitting and are passed on to daughter cells.
Peroxisome organization includes the division of existing peroxisomes, which involves membrane constriction and fission driven by proteins such as PEX11 and dynamin-related proteins. Division allows peroxisomes to proliferate under metabolic demand and to be inherited during cell division. The coordination of division with membrane growth and matrix import ensures that new organelles are functional.
Organelle contact sites and crosstalk
In simple terms: Peroxisomes physically touch other organelles to exchange materials and signals.
Peroxisome organization is integrated with organelle interaction networks, including membrane contact sites with mitochondria, the endoplasmic reticulum, and lipid droplets. Systems-level imaging has revealed dynamic contacts between peroxisomes and other organelles that facilitate lipid transfer and metabolic coordination. These interactions are important for redox balance and for the exchange of metabolites such as fatty acids and reactive oxygen species.
Peroxisome remodeling and degradation
In simple terms: Peroxisomes can be broken down or remodeled when conditions change.
Peroxisome organization also encompasses the disassembly or degradation of peroxisomes, which can occur through autophagic processes and allows cells to adjust organelle content to metabolic needs. Remodeling of peroxisome size and protein composition is part of the dynamic regulation of the organelle. This balance between biogenesis and degradation is critical for cellular homeostasis.
Key Genes Involved in GO:0007031 peroxisome organization
The following genes and proteins are central to peroxisome organization, based on verified literature on peroxins and related factors.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PEX1 | AAA-ATPase involved in matrix protein import receptor recycling | Mutations cause peroxisomal biogenesis disorders; target for KO studies |
| PEX2 | RING finger peroxin in matrix protein import | Disease-linked; used in import assays |
| PEX3 | Peroxisomal membrane protein docking factor | Essential for membrane biogenesis; KO models |
| PEX5 | PTS1 receptor for matrix protein import | Key for import; knockout affects peroxisome function |
| PEX6 | AAA-ATPase partner of PEX1 | Disease gene; studied in import cycling |
| PEX7 | PTS2 receptor for matrix protein import | Required for a subset of matrix proteins |
| PEX10 | RING finger peroxin in import | Disease-associated; functional studies |
| PEX11B | Promotes peroxisome division | Overexpression induces proliferation |
| PEX12 | RING finger peroxin in import | Disease gene; import assays |
| PEX13 | Docking protein for import receptors | KO affects import; interaction studies |
| PEX14 | Docking protein for import receptors | Central to import; proteomics |
| PEX16 | Membrane protein involved in peroxisome biogenesis | KO blocks peroxisome formation |
| PEX19 | Chaperone for membrane protein targeting | Essential for membrane protein delivery |
| PEX26 | Recruits PEX1/PEX6 to membrane | Disease gene; import studies |
| DNM1L | Dynamin-related protein for peroxisome fission | Division studies; KO affects peroxisome number |
| ACOX1 | Peroxisomal acyl-CoA oxidase | Matrix enzyme; marker of peroxisome function |
| CAT | Catalase detoxifies H2O2 | Matrix enzyme; peroxisome marker |
| AGPS | Alkylglycerone phosphate synthase for ether lipids | Ether lipid synthesis; peroxisome-dependent |
How Is peroxisome organization Regulated?
Peroxisome organization is regulated at multiple levels, including transcriptional control by peroxisome proliferator-activated receptors (PPARs), which link lipid metabolism to peroxisome proliferation and cancer progression. The process is also influenced by metabolic and oxidative stress signals that alter peroxisome number and function. Organelle contact sites with mitochondria and the endoplasmic reticulum provide spatial regulation of peroxisome dynamics. Additionally, the import and division machineries are regulated by cycling of PEX proteins and by post-translational modifications that adjust peroxisome biogenesis to cellular needs.
peroxisome organization and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PEX1 | Zellweger spectrum disorder | Knockout cell model to assess import defects |
| PEX6 | Peroxisomal biogenesis disorder | Point mutation knock-in to mimic patient alleles |
| PEX10 | Peroxisomal biogenesis disorder | Knockout and rescue with wild-type PEX10 |
| AGPS | Ether lipid deficiency and neurodevelopmental defects | Knockout for lipid profiling |
| PPARG | Cancer metabolism and lipid signaling | Overexpression and knockout in cancer cell lines |
Peroxisomal biogenesis disorders
Mutations in PEX genes that mediate peroxisome organization cause peroxisomal biogenesis disorders, including Zellweger spectrum disorders, which present with severe neurological and metabolic abnormalities. These disorders highlight the essential role of peroxisome organization in human development and physiology.
Neurodegeneration
Defects in peroxisome organization contribute to neurodegeneration through impaired lipid metabolism and oxidative stress, affecting neuronal membrane integrity and signaling. Ether lipid deficiency, a consequence of peroxisomal dysfunction, is particularly relevant to nervous system function.
Cancer metabolism
Peroxisome organization and PPAR signaling are linked to cancer progression by influencing lipid metabolism and gene expression programs. Targeting peroxisomal pathways is being explored as a therapeutic strategy in cancers with altered lipid metabolism.
Metabolic and inflammatory conditions
Oxysterols and phytosterols, which are influenced by peroxisomal and lipid metabolic pathways, play roles in human health and disease, linking peroxisome organization to broader metabolic and inflammatory processes.
From peroxisome organization-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of PEX3 abolish peroxisome formation? | PEX3 knockout cell line |
| How do patient mutations in PEX1 affect import? | Point mutation knock-in of patient variants |
| Can tagged PEX14 track import dynamics? | Tagged knock-in of PEX14 |
| Does PEX11B overexpression increase peroxisome number? | Overexpression cell model |
| What genes regulate peroxisome organization under lipid stress? | CRISPR library screening |
| How do peroxisome-mitochondria contacts change in disease? | Knockout models with imaging of contact sites |
How to Study the peroxisome organization Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Fluorescence microscopy | Peroxisome number, size, and dynamics | Assessing peroxisome organization in cells |
| Proteomics | Peroxisomal protein composition | Identifying peroxisome components |
| CRISPR knockout screening | Genes required for peroxisome organization | Functional genomics |
| Matrix protein import assay | Import efficiency of PTS1/PTS2 proteins | Testing PEX gene function |
| Organelle contact site imaging | Peroxisome-mitochondria/ER contacts | Studying organelle crosstalk |
| Lipid profiling | Ether lipid and fatty acid levels | Linking peroxisome organization to lipid metabolism |
| Transcriptomics | Expression of PEX and PPAR target genes | Regulatory studies |
| Live-cell imaging | Peroxisome division and inheritance | Dynamic organization studies |
Fluorescence imaging of peroxisomes
Fluorescence microscopy using peroxisome-targeted reporters allows visualization of peroxisome number, size, and dynamics, and is a primary method to assess peroxisome organization. Systems-level spectral imaging can reveal organelle interactome changes involving peroxisomes.
Proteomics of peroxisomes
Proteomic approaches identify peroxisomal proteins and their changes under different conditions, providing a comprehensive view of peroxisome composition and organization. These methods help define the molecular machinery required for peroxisome biogenesis.
Genetic screens and CRISPR perturbation
CRISPR knockout and library screening enable systematic discovery of genes required for peroxisome organization and function. Such screens can identify novel regulators and disease-relevant pathways.
Biochemical import assays
In vitro and in vivo import assays measure the translocation of matrix proteins into peroxisomes, directly testing the integrity of peroxisome organization. These assays are used to characterize PEX gene functions and patient mutations.
How CRISPR Can Be Used to Study GO:0007031 peroxisome organization
Knockout
CRISPR knockout of PEX genes such as PEX3, PEX5, or PEX19 abolishes peroxisome organization and provides a clean background to study import and membrane biogenesis defects. Knockout models are also used to test rescue by wild-type or mutant alleles.
Point Mutation
Point mutation knock-in can recreate patient-specific missense variants in PEX genes to dissect partial loss-of-function and dominant-negative effects on peroxisome organization. These models are valuable for genotype-phenotype studies.
Knock-in
Tagged knock-in of peroxisomal proteins, such as PEX14 or PEX11B, enables live-cell tracking of peroxisome dynamics and protein localization without overexpression artifacts. Knock-in reporters can also be used to monitor import in real time.
Overexpression
Overexpression of PEX11B or other division factors induces peroxisome proliferation and is used to study the regulation of peroxisome number and size. Overexpression models complement loss-of-function studies to define sufficiency.
How EDITGENE Supports peroxisome organization Research
Researchers studying peroxisome organization-related genes often need to determine whether a candidate gene is causally involved in peroxisome biogenesis, matrix protein import, or organelle dynamics. EDITGENE provides CRISPR-based cell model services to enable such causal experiments with high specificity and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for peroxisome organization research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| PLAAT3 Knockout HEK293 Cell Line | EDJ-KQ1272 | Human | 11145 | Details Get a Quote |
| ABCD3 Knockout HEK293 Cell Line | EDJ-KQ1905 | Human | 5825 | Details Get a Quote |
| PEX14 Knockout HEK293 Cell Line | EDJ-KQ3349 | Human | 5195 | Details Get a Quote |
| ABCD1 Knockout HEK293 Cell Line | EDC90269 | Human | 215 | Details Get a Quote |
| ABCD2 Knockout HEK293 Cell Line | EDJ-KQ4046 | Human | 225 | Details Get a Quote |
| PEX7 Knockout HEK293 Cell Line | EDJ-KQ5438 | Human | 5191 | Details Get a Quote |
| PEX10 Knockout HEK293 Cell Line | EDJ-KQ5440 | Human | 5192 | Details Get a Quote |
| PEX1 Knockout HEK293 Cell Line | EDJ-KQ5444 | Human | 5189 | Details Get a Quote |
| PEX6 Knockout HEK293 Cell Line | EDJ-KQ5449 | Human | 5190 | Details Get a Quote |
| PEX19 Knockout HEK293 Cell Line | EDJ-KQ5611 | Human | 5824 | Details Get a Quote |
| ABCD4 Knockout HEK293 Cell Line | EDJ-KQ5612 | Human | 5826 | Details Get a Quote |
| PEX2 Knockout HEK293 Cell Line | EDJ-KQ5615 | Human | 5828 | Details Get a Quote |
| PEX3 Knockout HEK293 Cell Line | EDJ-KQ6260 | Human | 8504 | Details Get a Quote |
| PEX11B Knockout HEK293 Cell Line | EDJ-KQ6365 | Human | 8799 | Details Get a Quote |
| PEX11A Knockout HEK293 Cell Line | EDJ-KQ6366 | Human | 8800 | Details Get a Quote |
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Frequently Asked Questions About peroxisome organization
What is GO:0007031 peroxisome organization?
GO:0007031 is the biological process that assembles, arranges, and disassembles peroxisomes, small O2-using organelles that oxidize organic molecules.
What genes are involved in peroxisome organization?
Key genes include PEX1, PEX3, PEX5, PEX6, PEX7, PEX10, PEX11B, PEX12, PEX13, PEX14, PEX16, PEX19, and PEX26, which encode peroxins required for biogenesis and import.
Why is peroxisome organization important for human health?
It is essential for lipid metabolism and redox balance, and its disruption causes peroxisomal biogenesis disorders and contributes to neurodegeneration and cancer.
How do peroxisomes interact with other organelles?
Peroxisomes form membrane contact sites with mitochondria, the endoplasmic reticulum, and lipid droplets to exchange lipids and signals.
What diseases are linked to defects in peroxisome organization?
Zellweger spectrum disorders and other peroxisomal biogenesis disorders, as well as neurodegenerative and metabolic conditions.
How can CRISPR be used to study peroxisome organization?
CRISPR knockout, point mutation knock-in, tagged knock-in, and overexpression models allow causal testing of PEX gene function and peroxisome dynamics.
What methods are used to measure peroxisome organization?
Fluorescence imaging, proteomics, import assays, lipid profiling, and CRISPR screens are commonly used.
What is the role of PEX11B in peroxisome organization?
PEX11B promotes peroxisome division, and its overexpression increases peroxisome number.
How are ether lipids related to peroxisome organization?
Ether lipid synthesis depends on peroxisomal enzymes such as AGPS and requires proper peroxisome organization.
Can peroxisome organization be regulated by PPARs?
Yes, PPARs link lipid metabolism to peroxisome proliferation and are relevant to cancer progression.
Conclusion
GO:0007031 peroxisome organization is a dynamic and essential cellular process that governs the assembly, maintenance, and disassembly of peroxisomes. Its molecular machinery, centered on PEX genes and peroxins, supports lipid metabolism, redox balance, and organelle crosstalk, and its dysfunction underlies severe human disorders. CRISPR-based models and advanced imaging and proteomic methods continue to reveal how peroxisome organization is regulated and how it contributes to disease, offering new opportunities for therapeutic targeting and biomarker discovery.
References
- 1. Kumar R et al.. 2024. The peroxisome: an update on mysteries 3.0.. Histochem Cell Biol 161(2):99-132 PMID: 38244103
- 2. Li Y et al.. 2024. Peroxisome proliferator-activated receptors: A key link between lipid metabolism and cancer progression.. Clin Nutr 43(2):332-345 PMID: 38142478
- 4. Cohen S et al.. 2018. Interacting organelles.. Curr Opin Cell Biol 53:84-91 PMID: 30006038
- 5. Valm AM et al.. 2017. Applying systems-level spectral imaging and analysis to reveal the organelle interactome.. Nature 546(7656):162-167 PMID: 28538724
- 6. Dean JM et al.. 2018. Structural and functional roles of ether lipids.. Protein Cell 9(2):196-206 PMID: 28523433
- 7. Saleem RA et al.. 2006. Proteomics of the peroxisome.. Biochim Biophys Acta 1763(12):1541-51 PMID: 17050007
- 8. Massaad C et al.. 2017. Oxysterols and phytosterols in human health.. Chem Phys Lipids 207(Pt B):49-50 PMID: 28800872
