HMOX1 Antibody – Rabbit Polyclonal

Heme oxygenase, an essential enzyme in heme catabolism, cleaves heme to form biliverdin, which is subsequently converted to bilirubin by biliverdin reductase, and carbon monoxide, a putative neurotransmitter. Heme oxygenase activity is induced by its substrate heme and by various nonheme substances. Heme oxygenase occurs as 2 isozymes, an inducible heme oxygenase-1 and a constitutive heme oxygenase-2. HMOX1 and HMOX2 belong to the heme oxygenase family. [provided by RefSeq, Jul 2008]

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: EC 1.14.99.3; Cofactor and Vitamin Metabolism - porphyrin and chlorophyll; Oxidoreductase

Chromosomal Location of Human Ortholog: 22q13.1

Cellular Component: extracellular space; endoplasmic reticulum membrane; membrane; endoplasmic reticulum; perinuclear region of cytoplasm; nucleolus; caveola; cytosol; nucleus

Molecular Function: protein binding; signal transducer activity; enzyme binding; protein homodimerization activity; metal ion binding; phospholipase D activity; heme binding; heme oxygenase (decyclizing) activity

Biological Process: cell death; response to nicotine; cellular iron ion homeostasis; negative regulation of smooth muscle cell proliferation; negative regulation of mast cell degranulation; positive regulation of smooth muscle cell proliferation; excretion; positive regulation of vasodilation; erythrocyte homeostasis; regulation of transcription factor activity; heme catabolic process; small GTPase mediated signal transduction; regulation of blood pressure; porphyrin metabolic process; negative regulation of mast cell cytokine production; negative regulation of neuron apoptosis; angiogenesis; regulation of transcription from RNA polymerase II promoter in response to oxidative stress; healing during inflammatory response; transmembrane transport; protein homooligomerization; positive regulation of I-kappaB kinase/NF-kappaB cascade; negative regulation of transcription factor activity; heme oxidation; cellular response to nutrient; negative regulation of leukocyte migration; regulation of angiogenesis; negative regulation of DNA binding; iron ion homeostasis; positive regulation of angiogenesis; positive regulation of chemokine biosynthetic process; DNA damage response, signal transduction resulting in induction of apoptosis; response to hydrogen peroxide; response to estrogen stimulus; endothelial cell proliferation; response to oxidative stress; smooth muscle hyperplasia

Disease: Heme Oxygenase 1 Deficiency; Pulmonary Disease, Chronic Obstructive