Cat — Catalase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Gene Information | |
|---|---|
| Symbol | CAT |
| Full Name | Catalase |
| Chromosome | 11 |
| NCBI Gene ID | 847 |
| OMIM | 115500 |
| UniProt ID | P04040 |
| Ensembl ID | ENSG00000121691 |
CAT (Catalase) is a key antioxidant enzyme that catalyzes the decomposition of hydrogen peroxide (H₂O₂) to water and oxygen. It is crucial for cellular defense against oxidative stress. Catalase deficiency has been implicated in neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, and ALS, where oxidative stress is a major pathological mechanism.
Catalase is a tetrameric heme-containing enzyme that functions as one of the primary antioxidant defenses in cells. It rapidly converts H₂O₂, a reactive oxygen species (ROS), into harmless water and oxygen. Catalase is localized primarily in peroxisomes but also exists in cytosol and mitochondria.
Ubiquitously expressed, high levels in liver, kidney, and brain.
| Disease | Role in Disease |
|---|---|
| Alzheimer's Disease | Antioxidant defense, H₂O₂ detoxification, Aβ-induced oxidative stress |
| Parkinson's Disease | Dopamine oxidation, oxidative stress, mitochondrial function |
| ALS | Motor neuron survival, oxidative stress response |
| HD | Mitochondrial dysfunction, oxidative damage |
CAT (Catalase) is a key antioxidant enzyme that decomposes hydrogen peroxide (H2O2) into water and oxygen, protecting cells from oxidative damage. Catalase is one of the primary enzymatic defenses against reactive oxygen species.
Catalase:
| Approach | Target | Status |
|---|---|---|
| Catalase gene therapy | Increase expression | Research |
| Small molecule activators | Enhance activity | Preclinical |
| H2O2 scavengers | Reduce oxidative stress | Clinical trials |
Catalase is expressed in peroxisomes (primary location), cytosol and mitochondria, with highest levels in liver, kidney, and brain. Brain expression is widespread but highest in hippocampus and cerebellum.
Catalase catalyzes the decomposition of hydrogen peroxide into water and oxygen, protecting cells from oxidative damage.
Catalase is essential for peroxisome function and lipid metabolism.
Catalase activity is reduced in AD brains, leading to increased H2O2 and oxidative damage (PubMed: 10077666).
Catalase overexpression protects against MPTP-induced parkinsonism in models.
Catalase reduces ischemic damage by limiting oxidative stress.
Catalase delivery approaches, small molecule catalase mimetics, and gene therapy for oxidative stress are being explored.
The study of Cat — Catalase has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
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