SNX3
Description
The SNX3 (sorting nexin 3) is a protein-coding gene located on chromosome 6.
Sorting nexin-3 is a protein that in humans is encoded by the SNX3 gene. This gene encodes a member of the sorting nexin family. Members of this family contain a phox (PX) domain, which is a phosphoinositide binding domain, and are involved in intracellular trafficking. This protein does not contain a coiled coil region, like most family members. This protein interacts with phosphatidylinositol-3-phosphate, and is involved in protein trafficking.
Phosphoinositide-binding protein required for multivesicular body formation. Specifically binds phosphatidylinositol 3-phosphate (PtdIns(P3)). Can also bind phosphatidylinositol 4-phosphate (PtdIns(P4)), phosphatidylinositol 5-phosphate (PtdIns(P5)) and phosphatidylinositol 3,5-biphosphate (PtdIns(3,5)P2) (By similarity). 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 (PubMed:21725319, PubMed:24344282, PubMed:30213940). Promotes stability and cell surface expression of epithelial sodium channel (ENAC) subunits SCNN1A and SCNN1G (By similarity). Not involved in EGFR degradation. Involved in the regulation of phagocytosis in dendritic cells possibly by regulating EEA1 recruitment to the nascent phagosomes (PubMed:23237080). 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 (By similarity). In the case of Salmonella enterica infection plays arole in maturation of the Salmonella-containing vacuole (SCV) and promotes recruitment of LAMP1 to SCVs (PubMed:20482551). {ECO:0000250|UniProtKB:O70492, ECO:0000269|PubMed:11433298, ECO:0000269|PubMed:18767904, ECO:0000269|PubMed:21725319, ECO:0000269|PubMed:23237080, ECO:0000269|PubMed:24344282, ECO:0000305|PubMed:21725319}.
SNX3 is also known as Grd19, MCOPS8, SDP3.
Associated Diseases
- Parkinson disease
- Alzheimer disease
- multiple sclerosis
- lysosomal storage disease
- hemoglobin E-beta-thalassemia syndrome
- microcytic anemia with liver iron overload
- dehydrated hereditary stomatocytosis
- gluthathione peroxidase deficiency
- hemoglobin D disease
- hemolytic anemia due to erythrocyte adenosine deaminase overproduction
- IRIDA syndrome
- hemoglobin E disease
- familial pseudohyperkalemia
- Rh deficiency syndrome
- elliptocytosis 2
- Meckel syndrome
- monosomy 7 myelodysplasia and leukemia syndrome 1
- delta-beta-thalassemia
