HMOX1: Heme oxygenase cleaves the heme ring at the alpha methene bridge to form biliverdin. Biliverdin is subsequently converted to bilirubin by biliverdin reductase. Under physiological conditions, the activity of heme oxygenase is highest in the spleen, where senescent erythrocytes are sequestrated and destroyed. Heme oxygenase 1 activity is highly inducible by its substrate heme and by various non-heme substances such as heavy metals, bromobenzene, endotoxin, oxidizing agents and UVA. Expressed at higher levels in renal cancer tissue than in normal tissue. Belongs to the heme oxygenase family.
Protein type: Oxidoreductase; EC 1.14.99.3; Cofactor and Vitamin Metabolism - porphyrin and chlorophyll
Cellular Component: caveola; cytosol; endoplasmic reticulum; endoplasmic reticulum membrane; nucleolus; nucleus; perinuclear region of cytoplasm; plasma membrane
Molecular Function: enzyme binding; heme binding; heme oxygenase (decyclizing) activity; metal ion binding; oxidoreductase activity; phospholipase D activity; protein binding; protein homodimerization activity; signal transducer activity
Biological Process: angiogenesis; cell death; cellular iron ion homeostasis; cellular response to nutrient; DNA damage response, signal transduction resulting in induction of apoptosis; erythrocyte homeostasis; healing during inflammatory response; heme catabolic process; heme metabolic process; heme oxidation; iron ion homeostasis; negative regulation of cell proliferation; negative regulation of DNA binding; negative regulation of mast cell cytokine production; negative regulation of mast cell degranulation; negative regulation of neuron apoptosis; negative regulation of smooth muscle cell proliferation; negative regulation of transcription factor activity; phospholipid metabolic process; positive regulation of angiogenesis; positive regulation of apoptosis; positive regulation of I-kappaB kinase/NF-kappaB cascade; positive regulation of macroautophagy; positive regulation of smooth muscle cell proliferation; protein homooligomerization; regulation of blood pressure; regulation of transcription factor activity; regulation of transcription from RNA polymerase II promoter in response to oxidative stress; response to estrogen stimulus; response to hydrogen peroxide; response to hypoxia; response to nicotine; response to oxidative stress; small GTPase mediated signal transduction
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