a component of the NADPH-oxidase, a multicomponent enzyme system responsible for the oxidative burst. Upon neutrophil stimulation, this protein and other cytosolic elements are sent to the cell membrane from the cytosol to form a complex which produces phagocytic oxygen radicals. Responsible for the downregulation of NADPH-oxidase. Alternative splicing has been observed. Note: This description may include information from UniProtKB.
Molecular Function: ARF guanyl-nucleotide exchange factor activity; phosphatidylinositol 3-phosphate binding; protein binding; protein dimerization activity; superoxide-generating NADPH oxidase activator activity
Biological Process: antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent; cell redox homeostasis; immune response; vascular endothelial growth factor receptor signaling pathway; vesicle-mediated transport