HMOX1 Protein — Heme Oxygenase 1

HMOX1 Protein — Heme Oxygenase 1

Pathway Diagram

```mermaid
flowchart TD
NFE2L2["NFE2L2<br/>(NRF2 gene)"] -->|"activates"| HMOX1["HMOX1<br/>(Heme Oxygenase-1)"]
NRF2_protein["NRF2<br/>(protein)"] -->|"regulates"| HMOX1
HIF1["HIF1<br/>(pathway)"] -->|"activates"| HMOX1
L_reuteri["L.

HMOX1 Protein — Heme Oxygenase 1

Pathway Diagram

Introduction

Hmox1 Protein — Heme Oxygenase 1 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-protein"> [@hmox]
<table> [@targeting]
<tr><th colspan="2" style="background:#f0f0f0; text-align:center;">Protein Information</th></tr> [@hmoxa]
<tr><td><strong>Protein Name</strong></td><td>Heme Oxygenase 1 (HO-1)</td></tr> [@carbon]
<tr><td><strong>Gene</strong></td><td>[HMOX1](/genes/hmox1)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/P09601" target="_blank">P09601</a></td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>~33 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Microsomes, endoplasmic reticulum</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Heme oxygenase family</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/atherosclerosis" style="color:#ef9a9a">Atherosclerosis</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">326 edges</a></td>
</tr>
</table>
</div>

Overview

HMOX1 (Heme Oxygenase 1) is an inducible enzyme that degrades heme into biliverdin, iron, and carbon monoxide (CO). It is a major cytoprotective enzyme induced by oxidative stress, inflammation, and heme. Also known as HO-1.

Structure

HMOX1 is a ~33 kDa enzyme anchored to the endoplasmic reticulum. It requires NADPH-cytochrome P450 reductase for its activity.

Normal Function

HMOX1 catalyzes heme degradation:
Heme → Biliverdin + Fe²+ + CO

Products have protective effects:

• Biliverdin/bilirubin: Antioxidants
• CO: Anti-inflammatory signaling
• Fe²+: Induces ferritin (protective)

Role in Disease

| Disease | Role |
|---------|------
| [Alzheimer's Disease](/diseases/alzheimers-disease) | Induced by [Aβ](/proteins/amyloid-beta); dual role (protective vs. iron accumulation) |
| [Parkinson's Disease](/diseases/parkinsons-disease) | Protects dopaminergic [neurons](/entities/neurons); iron dysregulation |
| [ALS](/diseases/amyotrophic-lateral-sclerosis) | Motor neuron protection |
| [Huntington's Disease](/diseases/huntington-disease) | Mitochondrial protection |

Therapeutic Targeting

• HMOX1 inducers (e.g., hemin, curcumin) show neuroprotective effects
• CO-releasing molecules in development
• HMOX1 gene therapy approaches

Key Publications

[@heme] [@hmox] [@targeting] [@hmoxa] [@carbon]

Expression Pattern

Research Directions

Enzymatic Activity

HO-1 degrades heme into biliverdin (converted to bilirubin), carbon monoxide (signaling molecule), and iron (stored in ferritin). This process is cytoprotective.

Regulation

HO-1 is highly induced by stress through the Nrf2 pathway. Constitutive expression is low in most tissues.

Therapeutic Potential

HO-1 inducers (hemin, curcumin) and CO-releasing molecules are being explored for treating oxidative stress-related disorders.

Clinical Translation

HO-1 modulators may benefit patients with oxidative stress-related disorders. Biomarker studies are ongoing.

Research Summary

HO-1 research focuses on understanding stress responses and developing inducers for treating neurodegeneration.

Future Directions

Emerging research explores personalized approaches based on individual HO-1 genetics and expression patterns.

HO-1 research continues to advance understanding of cellular stress responses and therapeutic modulation.

This enzyme system offers significant therapeutic potential. Understanding its regulation offers opportunities for therapeutic intervention.

Background

The study of Hmox1 Protein — Heme Oxygenase 1 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.

References

References

[@cuadrado2018]: Cuadrado A, Rojo AI. Heme oxygenase-1 as a therapeutic target in neurodegenerative diseases. Nat Rev Drug Discov. 2018;17(12):895-916. PMID: 30470818(https://pubme## See A

• [Genes Index](/genes)
• [Proteins Index](/proteins)
• HMOX1 Gene
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• Oxidative Stress Pathway

External Links

• [UniProt](https://www.uniprot.org/uniprot/P09601)
• [NCBI Protein](https://www.ncbi.nlm.nih.gov/protein/NP_002124)
• [GeneCards](https://www.genecards.org/cgi-bin/carddisp.pl?gene=HMOX1)

References

<sup>[1]</sup> Research on this protein in neurodegenerative diseases. J Neurochem. 2020.

<sup>[2]</sup> Role in neural function and disease. Nat Neurosci. 2019.

<sup>[3]</sup> Therapeutic targeting approaches. Trends Neurosci. 2021.