GO:0045333 cellular respiration: Energy Metabolism Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0045333 cellular respiration is the enzymatic release of energy from organic and inorganic compounds, either requiring oxygen (aerobic) or not (anaerobic).
• Cellular respiration is central to mitochondrial function, ATP production, and metabolic fitness, and is studied across immunology, cancer, and neurodegeneration [1, 5, 6].
• Key regulators include FDX1, which controls protein lipoylation and mitochondrial respiration through LIAS binding, and nitric oxide, which can reversibly inhibit cytochrome c oxidase.
• Resveratrol and other polyphenols can inhibit cellular respiration, revealing new paradigms for metabolic control.
• Assays for mitochondrial respiration, such as Seahorse extracellular flux analysis, are standard methods to measure cellular metabolism and fitness.
• Dendritic cells and thymic fragments are emerging models to study oxygen-dependent respiration pathways and potential therapeutic interventions [1, 2].
Description
Cellular respiration (GO:0045333) is a fundamental biological process that encompasses the enzymatic release of energy from inorganic and organic compounds, especially carbohydrates and fats, through either oxygen-dependent (aerobic) or oxygen-independent (anaerobic) pathways. This process is essential for maintaining cellular energy homeostasis, producing ATP, and supporting biosynthetic reactions. Researchers across immunology, oncology, and neuroscience study cellular respiration to understand how metabolic reprogramming contributes to disease and to identify therapeutic targets [1, 5, 6]. The regulation of respiration involves a complex interplay of mitochondrial electron transport chain components, cofactors such as iron-sulfur clusters, and signaling molecules like nitric oxide [3, 4]. Recent advances in assay technologies, including real-time mitochondrial respiration measurements, have enabled precise quantification of metabolic fitness in various cell types. Moreover, natural compounds like resveratrol have been shown to modulate respiration, offering new avenues for pharmacological intervention. Understanding the molecular players and regulatory mechanisms of cellular respiration is therefore critical for both basic biology and translational research.
cellular respiration At A Glance
| GO ID | GO:0045333 |
|---|---|
| GO term | cellular respiration |
| Ontology | biological_process |
| Synonym | oxidative metabolic process, oxidative metabolism, respiration |
| Major function | Enzymatic release of energy from organic and inorganic compounds via aerobic or anaerobic pathways |
| Related processes | Mitochondrial electron transport, oxidative phosphorylation, glycolysis, TCA cycle |
| Key regulators | FDX1, LIAS, nitric oxide, resveratrol-sensitive pathways |
| Research methods | Seahorse extracellular flux analysis, respirometry, mitochondrial assays |
What Is GO:0045333?
According to the Gene Ontology, cellular respiration (GO:0045333) is defined as the enzymatic release of energy from inorganic and organic compounds (especially carbohydrates and fats) which either requires oxygen (aerobic respiration) or does not (anaerobic respiration). This process includes oxidative metabolic processes and respiration, and is a core component of cellular energy metabolism.
Why Is cellular respiration Important in Cell Biology?
Cellular respiration is vital because it supplies the majority of ATP in most eukaryotic cells and serves as a hub for metabolic signaling. Dysregulation of respiration is linked to a wide range of diseases, including cancer, neurodegenerative disorders, and immune dysfunction [1, 6]. Understanding how respiration is controlled at the molecular level can reveal therapeutic targets and biomarkers for metabolic diseases.
• Provides ATP for cellular processes and survival.
• Integrates carbohydrate and fat metabolism.
• Regulates immune cell function, including dendritic cells.
• Involved in thymic T-cell development and selection.
• FDX1-dependent lipoylation controls mitochondrial respiration and is a target in cancer.
• Nitric oxide modulates respiration by inhibiting cytochrome c oxidase.
• Resveratrol inhibits respiration, offering a paradigm for metabolic intervention.
• Mitochondrial respiration assays are used to assess cellular fitness and drug responses.
• Respiration is critical for lung function and respiratory physiology.
• Electrospun fibers can protect mitochondrial function and enhance respiration.
What Happens During cellular respiration?
Glycolysis and substrate oxidation
In simple terms: Cells break down sugars and fats to extract energy.
Cellular respiration begins with the breakdown of glucose and other substrates through glycolysis and fatty acid oxidation, producing acetyl-CoA and reducing equivalents. These reactions occur in the cytoplasm and mitochondria and are essential for feeding electrons into the respiratory chain.
TCA cycle and electron transport
In simple terms: The TCA cycle generates electron carriers that donate electrons to the respiratory chain.
The tricarboxylic acid (TCA) cycle oxidizes acetyl-CoA to CO2, generating NADH and FADH2. These electron carriers donate electrons to the mitochondrial electron transport chain (ETC), where oxygen serves as the final electron acceptor in aerobic respiration [1, 5].
Oxidative phosphorylation and ATP synthesis
In simple terms: The ETC creates a proton gradient that drives ATP production.
As electrons flow through ETC complexes I-IV, protons are pumped across the inner mitochondrial membrane, creating a proton motive force. ATP synthase (complex V) uses this gradient to synthesize ATP. This process is tightly coupled to oxygen consumption and is the primary source of cellular ATP [1, 5].
Anaerobic respiration and alternative pathways
In simple terms: When oxygen is limited, cells can use other electron acceptors to produce energy.
In the absence of oxygen, some organisms and cells can perform anaerobic respiration using alternative electron acceptors such as nitrate or sulfate, or rely on fermentation. These pathways are less efficient but allow energy production under hypoxic conditions.
Regulation by nitric oxide and metabolic inhibitors
In simple terms: Nitric oxide and certain compounds can slow down respiration.
Nitric oxide (NO) reversibly inhibits cytochrome c oxidase (complex IV), thereby modulating cellular respiration and oxygen consumption. This regulation is important in immune responses and vascular biology. Similarly, resveratrol and other polyphenols can inhibit respiration, offering pharmacological control.
Key Genes Involved in GO:0045333 cellular respiration
The following genes and proteins are central to cellular respiration, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FDX1 | Regulates protein lipoylation and mitochondrial respiration | Target in cancer metabolism |
| LIAS | Lipoylation of mitochondrial proteins | Interacts with FDX1 to control respiration |
| NDUFS1 | Complex I subunit of ETC | Mutations cause mitochondrial disorders |
| SDHA | Complex II subunit | TCA cycle and ETC link |
| UQCRC1 | Complex III subunit | Electron transfer |
| COX4I1 | Complex IV subunit | Cytochrome c oxidase activity |
| ATP5F1A | ATP synthase subunit | ATP production |
| ANT1 | ADP/ATP translocase | Mitochondrial transport |
| VDAC1 | Outer membrane channel | Metabolite exchange |
| PPARGC1A | Mitochondrial biogenesis regulator | Respiration capacity |
| TFAM | Mitochondrial transcription factor | mtDNA maintenance |
| SIRT1 | Deacetylase regulating metabolism | Resveratrol target |
| AMPK | Energy sensor | Regulates respiration |
| HIF1A | Hypoxia-inducible factor | Anaerobic metabolism |
| MYC | Oncogene regulating metabolism | Respiration and cancer |
| NRF1 | Nuclear respiratory factor | Mitochondrial gene expression |
| ESRRA | Estrogen-related receptor alpha | Mitochondrial function |
How Is cellular respiration Regulated?
Cellular respiration is regulated at multiple levels, including substrate availability, allosteric control of key enzymes, and transcriptional programs. The energy sensor AMPK and sirtuins such as SIRT1 modulate mitochondrial biogenesis and respiration in response to nutrient status [6, 8]. Nitric oxide provides a rapid, reversible inhibition of cytochrome c oxidase, adjusting respiration to physiological demand. Additionally, FDX1 and LIAS control protein lipoylation, which is required for the activity of several mitochondrial enzymes, thereby influencing respiratory capacity.
cellular respiration and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FDX1 | Cancer, lipoylation disorders | Knockout in cancer cell lines |
| LIAS | Mitochondrial metabolism | Point mutation knock-in |
| COX4I1 | Cytochrome c oxidase deficiency | Overexpression and KO models |
| PPARGC1A | Metabolic syndrome | Transgenic overexpression |
| SIRT1 | Metabolic and aging disorders | Resveratrol treatment models |
Cancer metabolism
Many cancer cells reprogram cellular respiration to support rapid growth. FDX1-dependent lipoylation is essential for mitochondrial respiration and is a vulnerability in certain cancers. Targeting respiration pathways is an active therapeutic strategy.
Neurodegeneration
Impaired mitochondrial respiration contributes to neuronal death in neurodegenerative diseases. Nitric oxide-mediated inhibition of respiration may exacerbate energy failure under pathological conditions.
Immune dysfunction
Dendritic cells rely on oxygen-dependent respiration for their function, and modulating these pathways can influence immune responses. Thymic T-cell development also depends on cellular respiration.
Respiratory and metabolic disorders
Defects in mitochondrial respiration underlie various respiratory chain disorders and metabolic syndromes. Enhancing mitochondrial function through targeting respiration is a potential therapeutic approach [6, 7].
From cellular respiration-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does FDX1 regulate respiration? | FDX1 knockout cell lines |
| How does NO inhibit respiration? | Point mutation in COX4I1 |
| Can resveratrol modulate respiration? | Overexpression of SIRT1 |
| What is the role of LIAS in lipoylation? | LIAS knock-in with tagged version |
| How do dendritic cells use oxygen? | Dendritic cell KO models |
| Does AMPK control mitochondrial biogenesis? | AMPK knockout mice |
How to Study the cellular respiration Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Seahorse XF | Oxygen consumption rate | Live-cell mitochondrial respiration |
| High-resolution respirometry | Tissue oxygen flux | Thymic fragment respiration |
| Western blot | Protein lipoylation | FDX1/LIAS function |
| Nitric oxide measurement | NO levels | Respiration inhibition |
| Resveratrol treatment | Respiration inhibition | Pharmacological modulation |
| Electrospun fiber culture | Mitochondrial protection | Enhancing respiration |
| RNA-seq | Gene expression | Metabolic profiling |
Mitochondrial respiration assays
Seahorse extracellular flux analysis measures oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) to assess mitochondrial respiration and glycolysis in live cells.
Respirometry in tissue fragments
High-resolution respirometry can be applied to thymic fragments or other tissues to measure cellular respiration ex vivo.
Genetic and pharmacological manipulation
Knockout or overexpression of genes such as FDX1, LIAS, or SIRT1, combined with inhibitors like resveratrol, allows dissection of respiration pathways [3, 8].
Imaging and mitochondrial function
Fluorescent probes and electrospun fibers can be used to monitor mitochondrial membrane potential and respiration in living cells.
How CRISPR Can Be Used to Study GO:0045333 cellular respiration
Knockout
CRISPR knockout of genes such as FDX1 or LIAS can reveal their essential roles in cellular respiration and lipoylation.
Point Mutation
Introducing point mutations in cytochrome c oxidase subunits can help map nitric oxide binding sites and respiratory control.
Knock-in
Tagged knock-in of LIAS or other mitochondrial proteins allows tracking of protein localization and interactions during respiration.
Overexpression
Overexpression of SIRT1 or PPARGC1A can enhance mitochondrial respiration and is used to study metabolic reprogramming [6, 8].
How EDITGENE Supports cellular respiration Research
Researchers studying cellular respiration-related genes often need to determine whether a candidate gene is causally involved in metabolic regulation. EDITGENE provides a comprehensive suite of CRISPR services to enable precise genetic manipulation and functional studies.
Contact EDITGENE today to design your custom CRISPR model for cellular respiration research.
Frequently Asked Questions About cellular respiration
What is cellular respiration GO:0045333?
Cellular respiration (GO:0045333) is the enzymatic release of energy from organic and inorganic compounds, either aerobically or anaerobically.
What genes are involved in cellular respiration?
Key genes include FDX1, LIAS, NDUFS1, SDHA, COX4I1, ATP5F1A, and PPARGC1A, among others [1, 3, 6].
How is cellular respiration measured?
It is commonly measured using Seahorse extracellular flux analysis or high-resolution respirometry [5, 2].
What is the role of FDX1 in respiration?
FDX1 regulates protein lipoylation and mitochondrial respiration by binding to LIAS.
Can nitric oxide affect cellular respiration?
Yes, nitric oxide reversibly inhibits cytochrome c oxidase, modulating respiration.
Does resveratrol inhibit cellular respiration?
Yes, resveratrol has been shown to inhibit cellular respiration, offering a pharmacological tool.
Why is cellular respiration important in immunology?
Dendritic cells and thymic T cells rely on oxygen-dependent respiration for their function and development [1, 2].
What diseases are linked to defective cellular respiration?
Cancer, neurodegeneration, and metabolic disorders are associated with altered respiration [1, 3, 6].
How can CRISPR be used to study cellular respiration?
CRISPR knockout, knock-in, and overexpression models enable functional dissection of respiration genes [3, 6].
What are the main stages of cellular respiration?
Glycolysis, TCA cycle, electron transport chain, and oxidative phosphorylation are the main stages [1, 5].
Conclusion
Cellular respiration (GO:0045333) is a cornerstone of cellular energy metabolism, with far-reaching implications for health and disease. Understanding its molecular regulators, such as FDX1, LIAS, and nitric oxide, provides insights into metabolic control and therapeutic opportunities [3, 4]. Advanced research methods and CRISPR models continue to unravel the complexities of respiration, paving the way for targeted interventions [5, 6].
References
- 1. Peter A et al.. 2025. Cellular respiration in dendritic cells: Exploring oxygen-dependent pathways for potential therapeutic interventions.. Free Radic Biol Med 227:536-556 PMID: 39643130
- 2. Alshamsi M et al.. 2022. Cellular Respiration in Thymic Fragments from Mice.. Front Biosci (Landmark Ed) 27(8):230 PMID: 36042174
- 3. Dreishpoon MB et al.. 2023. FDX1 regulates cellular protein lipoylation through direct binding to LIAS.. J Biol Chem 299(9):105046 PMID: 37453661
- 4. Brunori M et al.. 1999. Nitric oxide and cellular respiration.. Cell Mol Life Sci 56(7-8):549-57 PMID: 11212305
- 5. Smolina N et al.. 2023. Assaying Mitochondrial Respiration as an Indicator of Cellular Metabolism and Fitness.. Methods Mol Biol 2644:3-14 PMID: 37142912
- 6. Agrawal A et al.. 2016. Rejuvenating cellular respiration for optimizing respiratory function: targeting mitochondria.. Am J Physiol Lung Cell Mol Physiol 310(2):L103-13 PMID: 26566906
- 7. Chen W et al.. 2021. Electrospun Fibers Improving Cellular Respiration via Mitochondrial Protection.. Small 17(46):e2104012 PMID: 34636157
- 8. Madrigal-Perez LA et al.. 2016. Resveratrol Inhibition of Cellular Respiration: New Paradigm for an Old Mechanism.. Int J Mol Sci 17(3):368 PMID: 26999118
