SNX3 Phosphoinositide-binding protein required for multivesicular body formation. Specifically binds phosphatidylinositol 3-phosphate (PtdIns(P3)). Also can bind phosphatidylinositol 4-phosphate (PtdIns(P4)), phosphatidylinositol 5-phosphate (PtdIns(P5)) and phosphatidylinositol 3,5-biphosphate (PtdIns(3,5)P2). Plays a role in protein transport between cellular compartments. Together with RAB7A facilitates endosome membrane association of the retromer cargo-selective subcomplex (CSC/VPS). May in part act as component of the SNX3-retromer complex which mediates the retrograde endosome-to-TGN transport of WLS distinct from the SNX-BAR retromer pathway. Promotes stability and cell surface expression of epithelial sodium channel (ENAC) subunits SCNN1A and SCNN1G. Not involved in EGFR degradation. Involved in the regulation of phagocytosis in dendritic cells possibly by regulating EEA1 recruitment to the nascent phagosomes. Involved in iron homeostasis through regulation of endocytic recycling of the transferrin receptor TFRC presumably by delivering the transferrin:transferrin receptor complex to recycling endosomes; the function may involve the CSC retromer subcomplex. In the case of Salmonella enterica infection plays arole in maturation of the Salmonella-containing vacuole (SCV) and promotes recruitment of LAMP1 to SCVs. Belongs to the sorting nexin family. 4 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.
Protein type: Vesicle
Chromosomal Location of Human Ortholog: 20q13
Cellular Component:  clathrin-coated vesicle; cytoplasm; cytosol; early endosome; early endosome membrane; early phagosome; endosome membrane
Molecular Function:  phosphatidylinositol-3,5-bisphosphate binding; phosphatidylinositol-3-phosphate binding; phosphatidylinositol-4-phosphate binding; phosphatidylinositol-5-phosphate binding; protein phosphatase binding
Biological Process:  hemoglobin biosynthetic process; intralumenal vesicle formation; membrane invagination; negative regulation of early endosome to late endosome transport; negative regulation of phagocytosis; negative regulation of protein catabolic process; negative regulation of protein transport; negative regulation of viral entry into host cell; positive regulation of neuron projection development; protein to membrane docking; protein transport; regulation of cellular protein metabolic process; regulation of intracellular protein transport; regulation of Wnt signaling pathway; response to bacterium; transferrin transport
Reference #:  Q5U211 (UniProtKB)
Alt. Names/Synonyms: LOC684097; Snx3; Sorting nexin-3
Gene Symbols: LOC684097
Molecular weight: 18,762 Da
Basal Isoelectric point: 8.71  Predict pI for various phosphorylation states
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SNX3

Protein Structure Not Found.


Cross-references to other databases:  STRING  |  Reactome  |  BioGPS  |  Pfam  |  Phospho.ELM  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept