CYP1B1: Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Defects in CYP1B1 are the cause of primary congenital glaucoma type 3A (GLC3A). GLC3A is an autosomal recessive form of primary congenital glaucoma (PCG). PCG is characterized by marked increase of intraocular pressure at birth or early childhood, large ocular globes (buphthalmos) and corneal edema. It results from developmental defects of the trabecular meshwork and anterior chamber angle of the eye that prevent adequate drainage of aqueous humor. Defects in CYP1B1 are a cause of primary open angle glaucoma (POAG). POAG is a complex and genetically heterogeneous ocular disorder characterized by a specific pattern of optic nerve and visual field defects. The angle of the anterior chamber of the eye is open, and usually the intraocular pressure is increased. The disease is asymptomatic until the late stages, by which time significant and irreversible optic nerve damage has already taken place. In some cases, POAG shows digenic inheritance involving mutations in CYP1B1 and MYOC genes. Defects in CYP1B1 are a cause of Peters anomaly (PAN). Peters anomaly is a congenital defect of the anterior chamber of the eye. Belongs to the cytochrome P450 family.
Protein type: Amino Acid Metabolism - tryptophan; Xenobiotic Metabolism - metabolism by cytochrome P450; EC 1.14.14.1; Oxidoreductase
Chromosomal Location of Human Ortholog: 2p22.2
Cellular Component: endoplasmic reticulum membrane; intracellular membrane-bound organelle; mitochondrion
Molecular Function: heme binding; iron ion binding; monooxygenase activity; oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen; oxygen binding
Biological Process: angiogenesis; arachidonic acid metabolic process; aromatic compound metabolic process; blood vessel morphogenesis; cell adhesion; collagen fibril organization; endothelial cell migration; epoxygenase P450 pathway; estrogen metabolic process; induction of apoptosis by oxidative stress; inhibition of NF-kappaB transcription factor; membrane lipid catabolic process; negative regulation of cell adhesion mediated by integrin; negative regulation of cell migration; negative regulation of cell proliferation; nitric oxide biosynthetic process; positive regulation of angiogenesis; positive regulation of apoptosis; positive regulation of JAK-STAT cascade; response to toxin; retinal metabolic process; retinol metabolic process; steroid metabolic process; sterol metabolic process; toxin metabolic process; visual perception; xenobiotic metabolic process
Disease: Glaucoma 3, Primary Congenital, A; Glaucoma 3, Primary Infantile, B; Peters Anomaly
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