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0TRI46_HUMAN*   SwissProt (?) | Description Local Annotation Link Reference
General Information
DescriptionTripartite motif protein 46 (tripartite, fibronectin type-iii and c- terminal spry motif protein).
SpeciesHomo sapiens (NCBI taxonomy ID: 9606)
Domain Architecture (Details)
InterPro domains assigned to SynO:
Soluble N-ethylmaleimide attachment protein receptor (SNARE) proteins are a family of membrane-associated proteins characterised by an alpha-helical coiled-coil domain called the SNARE motif . These proteins are classified as v-SNAREs and t-SNAREs based on their localisation on vesicle or target membrane; another classification scheme defines R-SNAREs and Q-SNAREs.s based on the conserved arginine or glutamine residue in the centre of the SNARE motif. SNAREs are localised to distinct membrane compartments of the secretory and endocytic trafficking pathways.nd contribute to the specificity of intracellular membrane fusion processes.The t-SNARE domain consists of a 4-helical bundle with a coiled-coil twist. The SNARE motif contributes to the fusion of two membranes. SNARE motifs fall into four classes: homologues of syntaxin 1a (t-SNARE).AMP-2 (v-SNARE).nd the N- and C-terminal SNARE motifs of SNAP-25. It is thought that one member from each class interacts to form a SNARE complex.The SNARE motif represented in this entry is found in the N-terminal domains of certain syntaxin family members: syntaxin 1a.hich is required for neurotransmitter release.yntaxin 6.hich is found in endosomal transport vesicles .east Sso1p .nd Vam3p. yeast syntaxin essential for vacuolar fusion . The SNARE motifs in these proteins share structural similarity.espite having a low level of sequence similarity.
InterPro domains unassigned to SynO:
The B-box zinc finger is an around 40 amino acids domain. One or two copies ofthis motif are generally associated with a ring finger and a coiled coil motifto form the so-called tripartite motif. It is found essentially intranscription factors.ibonucleoproteins and protooncoproteins.ut nofunction is clearly assigned to this domain . It has been shown to beessential but not sufficient to localize the PML protein in a punctate patternin interphase nuclei . Among the 7 possible ligands for the zinc atomcontained in a B-box.nly 4 are used and bind one zinc atom in a Cys2-His2tetrahedral arrangement. The NMR analysis reveals that the B-box structurecomprises two beta-strands.wo helical turns and three extended loop regionsdifferent from any other zinc binding motif .
  IPR000315:Zinc finger, B-box
Quality control of intracellular proteins is essential for cellular homeostasis. Molecular chaperones recognise and contribute to the refolding of misfolded or unfolded proteins.hereas the ubiquitin-proteasome system mediates the degradation of such abnormal proteins. Ubiquitin-protein ligases (E3s) determine the substrate specificity for ubiquitylation and have been classified into HECT and RING-finger families. More recently.owever.-box proteins.hich contain a domain (the U box) of about 70 amino acids that is conserved from yeast to humans.ave been identified as a new type of E3 .The RING-finger is a specialised type of Zn-finger of 40 to 60 residues that binds two atoms of zinc.nd is probably involved in mediating protein-protein interactions. . There are two different variants.he C3HC4-type and a C3H2C3-type.hich is clearly related despite the different cysteine/histidine pattern. The latter type is sometimes referred to as RING-H2 finger. The RING domain is a protein interaction domain which has been implicated in a range of diverse biological processes.E3 ubiquitin-protein ligase activity is intrinsic to the RING domain ofc-Cbl and is likely to be a general function of this domain; Various RINGfingers exhibit binding to E2 ubiquitin-conjugating enzymes (Ubcs) .Several 3D-structures for RING-fingers are known . The 3D structure of the zinc ligation system is unique to the RING domain and is referred to as the cross-brace motif. The spacing of the cysteines in such a domain is C-x(2)-C-x(9 to 39)-C-x(1 to 3)-H-x(2 to 3)-C-x(2)-C-x(4 to 48)-C-x(2)-C. Metal ligand pairs one and three co-ordinate to bind one zinc ion.hilst pairs two and four bind the second.s illustrated in the following schematic representation:Note that in the older literature.ome RING-fingers are denoted as LIM-domains. The LIM-domain Zn-finger is a fundamentally different family.lbeit with similar Cys-spacing (see ).
  IPR001841:Zinc finger, RING-type
Fibronectins are multi-domain glycoproteins found in a soluble form in plasma.nd in an insoluble form in loose connective tissue and basement membranes . They contain multiple copies of 3 repeat regions (types I.I and III).hich bind to a variety of substances including heparin.ollagen.NA.ctin.ibrin and fibronectin receptors on cell surfaces. The wide variety of these substances means that fibronectins are involved in a number of important functions: e.g..ound healing; cell adhesion; blood coagulation; cell differentiation and migration; maintenance of the cellular cytoskeleton; and tumour metastasis . The role of fibronectin in cell differentiation is demonstrated by the marked reduction in the expression of its gene when neoplastic transformation occurs. Cell attachment has been found to be mediated by the binding of the tetrapeptide RGDS to integrins on the cell surface .lthough related sequences can also display cell adhesion activity.Plasma fibronectin occurs as a dimer of 2 different subunits.inked together by 2 disulphide bonds near the C-terminus. The difference in the 2 chains occurs in the type III repeat region and is caused by alternative splicing of the mRNA from one gene . The observation that.n a given protein.n individual repeat of one of the 3 types (e.g..he first FnIII repeat) shows much less similarity to its subsequent tandem repeats within that protein than to its equivalent repeat between fibronectins from other suggested that the repeating structure of fibronectin arose at an early stage of evolution. It also seems to suggest that the structure is subject to high selective pressure .The fibronectin type III repeat region is an approximately 100 amino acid domain.ifferent tandem repeats of which contain binding sites for DNA.eparin and the cell surface . The superfamily of sequences believed to contain FnIII repeats represents 45 different families.he majority of which are involved in cell surface binding in some manner.r are receptor protein tyrosine kinases.r cytokine receptors.
  IPR003961:Fibronectin, type III
Fibronectin is composed of three repeating structural motifs.f which one is the FnIII module. The three modules form a linear sequence of multiple tandem copies connected by short linker peptides. The secondary structure of the FnIII10 module.hich is the only fibronectin module to possess an integrin binding RGD motif.onsists of two beta-sheets containing the antiparallel beta-strands ABE and DCFG.espectively.hich fold up to form a beta-sandwich. The RGD sequence is located in the loop connecting the beta-strands .The SSF signature in this entry is currently under review. Please be aware that some of the protein hits may be false positives.
  IPR008957:Fibronectin, type III-like fold
SequencesProtein: TRI46_HUMAN (759 aa)
mRNA: NM_025058
Local Annotation
Synapse Ontology
Fusion of intracellular membrane-bound vesicles with the pre-synaptic membrane of the neuronal cell resulting in release of neurotransmitter into the synaptic cleft.
sdb:0049 synaptic vesicle fusion  (Evidence:domains)
priming for exocytosis prepares the calcium-dependent release and may involve partial fusion process. The vesicles are primed and become responsive to calcium.
sdb:0120 priming  (Evidence:domains)
attachment of the vesicle filled with transmitters involves a specific interaction between the vesicle membrane and the presynaptic active zone.
sdb:0148 docking  (Evidence:domains)
sdb:0328 transmitters release and endocytosis  (Evidence:domains)
KO assignmentNot mapped to KEGG
Loci Structure (Details)Loci index, Chromosomal location, Length, Possible relational loci clusterExon1: 49 residues, 153412983-153413129Exon2: 89 residues, 153414485-153414747Exon3: 116 residues, 153414987-153415331Exon4: 50 residues, 153416031-153416175Exon5: 34 residues, 153416294-153416390Exon6: 86 residues, 153417101-153417355Exon7: 42 residues, 153417591-153417713Exon8: 103 residues, 153418731-153419034Exon9: 101 residues, 153420951-153421249Exon10: 393 residues, 153422896-153424069Exon11: 2 residues, -Jump to TRI46_HUMAN  
Tune and view alternative isoforms
Loci Cluster (Details)Loci: 3833 152220753-152225430 ~-5K 2681(RAB13)(-)Loci: 2551 152511662-152514973 ~-3K 2706(HAX1)(+)Loci: 2552 152806880-152815707 ~-9K 2720(CHRNB2)(+)Loci: 3834 152821158-152847306 ~-26K 2722(ADAR)(-)Loci: 3835 153201398-153209847 ~-8K 2739(SHC1)(-)Loci: 2553 153412983-153424069 ~-11K 2783(TRIM46)(+)Loci: 2554 153513997-153526262 ~-12K 2831(HCN3)(+)Loci: 3836 153526253-153537835 ~-12K 2833(PKLR)(-)Loci: 2555 153669594-153670676 ~-1K 2846(POU5FLC1)(+)Loci: 2556 154095923-154121459 ~-26K 2875(SYT11)(+)Loci: 3837 154183269-154214942 ~-32K 2882(ARHGEF2)(-)Loci: 2557 154297589-154306917 ~-9K 2890(RAB25)(+)Loci: 2558 154362603-154374280 ~-12K 2897(+)Loci: 2559 154855709-154862142 ~-6K 2944(HAPLN2)(+)Loci: 2560 154878363-154895942 ~-18K 2945(BCAN)(+)Loci: 3838 154905181-154913813 ~-9K 2947(NES)(-)Loci: 2561 155097294-155118266 ~-21K 2961(NTRK1)(+)Loci: 3839 155171256-155281786 ~-111K 2965(ARHGEF11)(-)Loci: 2550 151897823-151900928 ~-3K 2658(SNAPAP)(+)Link out to UCSC