Recombinant Human Neutrophil cytosol factor 4 (NCF4)

Uniprot Id

Q15080

Target Species

Human

Target Name

NCF4

Target Full Name

Neutrophil cytosol factor 4

Target Function

Component of the NADPH-oxidase, a multicomponent enzyme system responsible for the oxidative burst in which electrons are transported from NADPH to molecular oxygen, generating reactive oxidant intermediates. It may be important for the assembly and/or activation of the NADPH-oxidase complex.

Target Involvement

Granulomatous disease, chronic, cytochrome-b-positive 3, autosomal recessive (CGD3)

Target Subcellular Location

Cytoplasm, cytosol. Endosome membrane; Peripheral membrane protein; Cytoplasmic side. Membrane; Peripheral membrane protein.

Target Tissue Specificity

Expression is restricted to hematopoietic cells.

Target Synonyms

CGD3; MGC3810; NCF 4; NCF; NCF-4; Ncf4; NCF4_HUMAN; Neutrophil cytosol factor 4; Neutrophil cytosolic factor 4; Neutrophil NADPH oxidase factor 4; p40-phox; p40phox; SH3 and PX domain-containing protein 4; SH3PXD4

Target Background

The protein encoded by this gene is a cytosolic regulatory component of the superoxide-producing phagocyte NADPH-oxidase, a multicomponent enzyme system important for host defense. This protein is preferentially expressed in cells of myeloid lineage. It interacts primarily with neutrophil cytosolic factor 2 (NCF2/p67-phox) to form a complex with neutrophil cytosolic factor 1 (NCF1/p47-phox), which further interacts with the small G protein RAC1 and translocates to the membrane upon cell stimulation. This complex then activates flavocytochrome b, the membrane-integrated catalytic core of the enzyme system. The PX domain of this protein can bind phospholipid products of the PI(3) kinase, which suggests its role in PI(3) kinase-mediated signaling events. The phosphorylation of this protein was found to negatively regulate the enzyme activity. Alternatively spliced transcript variants encoding distinct isoforms have been observed.