STXBP3 syntaxin binding protein 3 [Homo sapiens (human)] - Gene

Summary

Official Symbol: STXBP3provided by HGNC
Official Full Name: syntaxin binding protein 3provided by HGNC
Primary source: HGNC:HGNC:11446
See related: Ensembl:ENSG00000116266 MIM:608339; AllianceGenome:HGNC:11446
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: PSP; MUNC18C; UNC-18C; MUNC18-3
Summary: Enables syntaxin binding activity. Involved in negative regulation of calcium ion-dependent exocytosis; neutrophil degranulation; and platelet aggregation. Located in cytosol; plasma membrane; and secretory granule. [provided by Alliance of Genome Resources, Nov 2024]
Expression: Ubiquitous expression in thyroid (RPKM 25.5), kidney (RPKM 20.8) and 25 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 1p13.3

Exon count:: 19

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	1	NC_000001.11 (108746674..108809523)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	1	NC_060925.1 (108779918..108842849)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	1	NC_000001.10 (109289296..109352145)

Chromosome 1 - NC_000001.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: HPA RNA-seq normal tissues
Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
BioProject: PRJEB4337
Publication: PMID 24309898
Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Variants in STXBP3 are Associated with Very Early Onset Inflammatory Bowel Disease, Bilateral Sensorineural Hearing Loss and Immune Dysregulation.
Title: Variants in STXBP3 are Associated with Very Early Onset Inflammatory Bowel Disease, Bilateral Sensorineural Hearing Loss and Immune Dysregulation.
Pancreatic acini from Munc18c-depleted mice (Munc18c(+/-)) and human pancreas (lenti-Munc18c-shRNA-treated) exhibit normal apical exocytosis of zymogen granules (ZGs) in response to physiologic stimulation with the intestinal hormone cholecystokinin (CCK-8).
Title: Depletion of the membrane-fusion regulator Munc18c attenuates caerulein hyperstimulation-induced pancreatitis.
PP2B-Aalpha-Munc18c complex supports agonist-induced VWF secretion by HUVECs.
Title: Disruption of protein complexes containing protein phosphatase 2B and Munc18c reduces the secretion of von Willebrand factor from endothelial cells.
Data suggest MUNC18C is required for STX4-mediated invadopodium formation and tumor invasion of extracellular matrix; N-terminal STX4 fragment binds to MUNC18C and inhibits interactions of STX4 with synaptosome-associated protein 23 (SNAP23) and vesicle-associated membrane protein 2 (VAMP2). Fibrosarcoma/adenocarcinoma cell lines were used in these studies. (MUNC18C = syntaxin binding protein MUNC18C; STX4 = syntaxin 4)
Title: Interaction of Munc18c and syntaxin4 facilitates invadopodium formation and extracellular matrix invasion of tumor cells.
In vitro interaction assays indicated that Doc2b is required to bridge the interaction between Munc18c and Munc18-1 in the macromolecular complex; Munc18c and Munc18-1 failed to associate in the absence of Doc2b
Title: Doc2b serves as a scaffolding platform for concurrent binding of multiple Munc18 isoforms in pancreatic islet β-cells.
Munc18c gene expression in human adipose tissue is down-regulated in morbid obesity.
Title: Munc18c in adipose tissue is downregulated in obesity and is associated with insulin.
Western Blot data showed decreased expression (p < 0,05) of Munc18c and phospho-PKC Zeta in polycystic ovary-insulin resistant endometria (PCOSE-IR) with respect to the control.
Title: Protein expression of PKCZ (Protein Kinase C Zeta), Munc18c, and Syntaxin-4 in the insulin pathway in endometria of patients with polycystic ovary syndrome (PCOS).
The identify IR as the first known tyrosine kinase for Munc18c as part of a new insulin-signaling step in GLUT4 vesicle exocytosis.
Title: Munc18c phosphorylation by the insulin receptor links cell signaling directly to SNARE exocytosis.
Observational study of gene-disease association and gene-gene interaction. (HuGE Navigator)
Title: Identification of type 2 diabetes-associated combination of SNPs using support vector machine.
These results indicate that insulin induces dynamic associations between PKCzeta, 80K-H, and munc18c and that 80K-H may act as a key signaling link between PKCzeta and munc18c in live cells.
Title: 80K-H acts as a signaling bridge in intact living cells between PKCzeta and the GLUT4 translocation regulator Munc18c.

Submit: New GeneRIF Correction See all GeneRIFs (12)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

EBI GWAS Catalog

Description
Genes linked to energy metabolism and immunoregulatory mechanisms are associated with subcutaneous adipose tissue distribution in HIV-infected men. EBI GWAS Catalog EBI GWAS CatalogPubMed

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

STXBP3__1208 (e-PCR)
- UniSTS:277777

HIAT1 (e-PCR)
- UniSTS:503847

SHGC-75260 (e-PCR)
- UniSTS:21314

SHGC-79358 (e-PCR)
- UniSTS:103257

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables protein-containing complex binding	IEA Inferred from Electronic Annotation more info
enables syntaxin binding	IPI Inferred from Physical Interaction more info	PubMed
enables syntaxin-1 binding	IBA Inferred from Biological aspect of Ancestor more info

Process	Evidence Code	Pubs
involved_in brain development	IEA Inferred from Electronic Annotation more info
involved_in cellular response to type II interferon	IEA Inferred from Electronic Annotation more info
involved_in insulin secretion	IEA Inferred from Electronic Annotation more info
involved_in intracellular glucose homeostasis	IEA Inferred from Electronic Annotation more info
involved_in intracellular protein transport	IBA Inferred from Biological aspect of Ancestor more info
involved_in negative regulation of D-glucose import	IEA Inferred from Electronic Annotation more info
involved_in negative regulation of calcium ion-dependent exocytosis	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in neutrophil degranulation	IEP Inferred from Expression Pattern more info	PubMed
involved_in platelet aggregation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in presynaptic dense core vesicle exocytosis	IBA Inferred from Biological aspect of Ancestor more info
involved_in protein to membrane docking	IEA Inferred from Electronic Annotation more info
involved_in response to insulin	IEA Inferred from Electronic Annotation more info
involved_in vesicle docking involved in exocytosis	IBA Inferred from Biological aspect of Ancestor more info

Component	Evidence Code	Pubs
located_in apical plasma membrane	IEA Inferred from Electronic Annotation more info
located_in basolateral plasma membrane	IEA Inferred from Electronic Annotation more info
located_in cytosol	IDA Inferred from Direct Assay more info	PubMed
located_in cytosol	TAS Traceable Author Statement more info
located_in extracellular exosome	HDA more info	PubMed
located_in phagocytic vesicle	IEA Inferred from Electronic Annotation more info
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info
located_in plasma membrane	IDA Inferred from Direct Assay more info	PubMed
located_in platelet alpha granule	IDA Inferred from Direct Assay more info	PubMed
located_in presynapse	IEA Inferred from Electronic Annotation more info
is_active_in secretory granule	IBA Inferred from Biological aspect of Ancestor more info
located_in specific granule	IDA Inferred from Direct Assay more info	PubMed
located_in tertiary granule	IDA Inferred from Direct Assay more info	PubMed

General protein information

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Preferred Names: syntaxin-binding protein 3

Names: platelet Sec1 protein; protein unc-18 homolog 3; protein unc-18 homolog C; syntaxin 4 binding protein; unc18-3

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.