Critical component of the membrane-bound oxidase of phagocytes that generates superoxide. Associates with NOX3 to form a functional NADPH oxidase constitutively generating superoxide. Defects in CYBA are a cause of chronic granulomatous disease autosomal recessive cytochrome-b-negative (ARCGD). Chronic granulomatous disease is a genetically heterogeneous disorder characterized by the inability of neutrophils and phagocytes to kill microbes that they have ingested. Patients suffer from life-threatening bacterial/fungal infections. Belongs to the p22phox family. Note: This description may include information from UniProtKB.
Protein type: Oxidoreductase; EC 1.-.-.-; Membrane protein, integral
Molecular Function: protein binding; electron carrier activity; protein heterodimerization activity; metal ion binding; superoxide-generating NADPH oxidase activity; heme binding; SH3 domain binding
Biological Process: response to nutrient levels; response to drug; respiratory burst; interaction with host; angiotensin-mediated regulation of glomerular filtration; superoxide metabolic process; antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent; positive regulation of cell growth; regulation of release of sequestered calcium ion into cytosol; antigen processing and presentation of peptide antigen via MHC class I; cytochrome complex assembly; antigen processing and presentation of exogenous peptide antigen via MHC class I; innate immune response; positive regulation of endothelial cell proliferation; smooth muscle hypertrophy; inflammatory response; vascular endothelial growth factor receptor signaling pathway; superoxide release; hydrogen peroxide biosynthetic process
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.