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0SNX18_HUMAN*   SwissProt (?) | Description Local Annotation Link Reference
General Information
NameSNAG1
DescriptionSorting nexin-18 (sorting nexin associated golgi protein 1).
SpeciesHomo sapiens (NCBI taxonomy ID: 9606)
GO0005515 protein binding (IPI)
Domain Architecture (Details)
InterPro domains unassigned to SynO:
The PX (phox) domain occurs in a variety of eukaryotic proteins and have been implicated in highly diverse functions such as cell signalling.esicular trafficking.rotein sorting and lipid modification . PX domains are important phosphoinositide-binding modules that have varying lipid-binding specificities .The PX domain is approximately 120 residues long .nd folds into a three-stranded beta-sheet followed by three -helices and a proline-rich region that immediately preceeds a membrane-interaction loop and spans approximately eight hydrophobic and polar residues. The PX domain of p47phox binds to the SH3 domain in the same protein. Phosphorylation of p47(phox). cytoplasmic activator of the microbicidal phagocyte oxidase (phox).licits interaction of p47(phox) with phoinositides. The protein phosphorylation-driven conformational change of p47(phox) enables its PX domain to bind to phosphoinositides.he interaction of which plays a crucial role in recruitment of p47(phox) from the cytoplasm to membranes and subsequent activation of the phagocyte oxidase. The lipid-binding activity of this protein is normally suppressed by intramolecular interaction of the PX domain with the C-terminal Src homology 3 (SH3) domain .The PX domain is conserved from yeast to human. A recent multiple alignment of representative PX domain sequences can be found in .lthough showing relatively little sequence conservation.heir structure appears to be highly conserved. Although phosphatidylinositol-3-phosphate (PtdIns(3)P) is the primary target of PX domains.inding to phosphatidic acid.hosphatidylinositol-3.-bisphosphate (PtdIns(3.)P2).hosphatidylinositol-3.-bisphosphate (PtdIns(3.)P2).hosphatidylinositol-4.-bisphosphate (PtdIns(4.)P2).nd phosphatidylinositol-3..-trisphosphate (PtdIns(3..)P3) has been reported as well. The PX-domain is also a protein-protein interaction domain .
  IPR001683:Phox-like
SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organisation. These were first described in the Src cytoplasmic tyrosine kinase . The structure is a partly opened beta barrel.
  IPR011511:Variant SH3
SH3 (src Homology-3) domains are small protein modules containing approximately 50 amino acid residues . They are found in a great variety of intracellular or membrane-associated proteins for example.n a variety of proteins with enzymatic activity.n adaptor proteins that lack catalytic sequences and in cytoskeletal proteins.uch as fodrin and yeast actin binding protein ABP-1. The SH3 domain has a characteristic fold which consists of five or six beta-strands arranged as two tightly packed anti-parallel beta sheets. The linker regions may contain short helices . The surface of the SH2-domain bears a flat.ydrophobic ligand-binding pocket which consists of three shallow grooves defined by conservative aromatic residues in which the ligand adopts an extended left-handed helical arrangement. The ligand binds with low affinity but this may be enhanced by multiple interactions.The region bound by the SH3 domain is in all cases proline-rich and contains PXXP as a core-conserved binding motif. The function of the SH3 domain is not well understood but they may mediate many diverse processes such as increasing local concentration of proteins.ltering their subcellular location and mediating the assembly of large multiprotein complexes .
  IPR001452:Src homology-3
IPR001683:PX 
Evalue:-25.3872165679932 
Location:273-382IPR011511:SH3_2 
Evalue:-14.040958404541 
Location:4-59
SequencesProtein: SNX18_HUMAN (628 aa)
mRNA: NM_052870
Local Annotation
Synapse Ontology
Calcium release from RyR (Ryanodine Receptor) in the SR (Sarcoplasmic Reticulum) is activated by the calcium induced-calcium-release
sdb:0325 RyR-CICR  (Evidence:keywords)
KO assignmentNot mapped to KEGG
Loci Structure (Details)Loci index, Chromosomal location, Length, Possible relational loci clusterExon1: 630 residues, 53849539-53851426Exon2: 2 residues, -Jump to SNX18_HUMAN  
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