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Aliases for STXBP2 Gene

Aliases for STXBP2 Gene

  • Syntaxin Binding Protein 2 2 3
  • UNC18B 3 4 6
  • Protein Unc-18 Homolog B 3 4
  • UNC18-2 3 4
  • Unc-18B 3 4
  • FHL5 3 6
  • Syntaxin-Binding Protein 2 3
  • Protein Unc-18 Homolog 2 4
  • MUNC18-2 3
  • Hunc18b 3
  • Pp10122 3

External Ids for STXBP2 Gene

Previous GeneCards Identifiers for STXBP2 Gene

  • GC19P007660
  • GC19P007806
  • GC19P007596
  • GC19P007608
  • GC19P007701
  • GC19P007371

Summaries for STXBP2 Gene

Entrez Gene Summary for STXBP2 Gene

  • This gene encodes a member of the STXBP/unc-18/SEC1 family. The encoded protein is involved in intracellular trafficking, control of SNARE (soluble NSF attachment protein receptor) complex assembly, and the release of cytotoxic granules by natural killer cells. Mutations in this gene are associated with familial hemophagocytic lymphohistiocytosis. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jan 2013]

GeneCards Summary for STXBP2 Gene

STXBP2 (Syntaxin Binding Protein 2) is a Protein Coding gene. Diseases associated with STXBP2 include hemophagocytic lymphohistiocytosis, familial, 5 and hemophagocytic lymphohistiocytosis. Among its related pathways are Insulin Signaling and Transcription_CREM signaling in testis. GO annotations related to this gene include syntaxin-1 binding and syntaxin-3 binding. An important paralog of this gene is STXBP1.

UniProtKB/Swiss-Prot for STXBP2 Gene

  • Involved in intracellular vesicle trafficking and vesicle fusion with membranes. Contributes to the granule exocytosis machinery through interaction with soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins that regulate membrane fusion. Regulates cytotoxic granule exocytosis in natural killer (NK) cells.

Gene Wiki entry for STXBP2 Gene

No data available for Tocris Summary , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for STXBP2 Gene

Genomics for STXBP2 Gene

Regulatory Elements for STXBP2 Gene

Genomic Location for STXBP2 Gene

7,636,881 bp from pter
7,647,874 bp from pter
10,994 bases
Plus strand

Genomic View for STXBP2 Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for STXBP2 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for STXBP2 Gene

Proteins for STXBP2 Gene

  • Protein details for STXBP2 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Syntaxin-binding protein 2
    Protein Accession:
    Secondary Accessions:
    • B4E175
    • E7EQD5
    • Q9BU65

    Protein attributes for STXBP2 Gene

    593 amino acids
    Molecular mass:
    66453 Da
    Quaternary structure:
    • Interacts with STX1A, STX2 and STX3 (By similarity). Interacts with STX11.

    Three dimensional structures from OCA and Proteopedia for STXBP2 Gene

    Alternative splice isoforms for STXBP2 Gene


neXtProt entry for STXBP2 Gene

Proteomics data for STXBP2 Gene at MOPED

Post-translational modifications for STXBP2 Gene

  • Ubiquitination at Lys13, Lys63, Lys89, Lys208, Lys213, Lys225, Lys320, Lys324, Lys480, and Lys560
  • Modification sites at PhosphoSitePlus

No data available for DME Specific Peptides for STXBP2 Gene

Domains for STXBP2 Gene

Protein Domains for STXBP2 Gene


Suggested Antigen Peptide Sequences for STXBP2 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Q15833
  • Belongs to the STXBP/unc-18/SEC1 family.
genes like me logo Genes that share domains with STXBP2: view

No data available for Gene Families for STXBP2 Gene

Function for STXBP2 Gene

Molecular function for STXBP2 Gene

GENATLAS Biochemistry: syntaxin binding protein 2,expressed predominantly in placenta,lung,liver,kidney,pancreas,soluble N ethylmaleimide-sensitive factor-attachment protein receptor,SNARE protein
UniProtKB/Swiss-Prot Function: Involved in intracellular vesicle trafficking and vesicle fusion with membranes. Contributes to the granule exocytosis machinery through interaction with soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins that regulate membrane fusion. Regulates cytotoxic granule exocytosis in natural killer (NK) cells.

Gene Ontology (GO) - Molecular Function for STXBP2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005515 protein binding IPI 19804848
GO:0017075 syntaxin-1 binding IEA --
GO:0030348 syntaxin-3 binding IPI 18588921
genes like me logo Genes that share ontologies with STXBP2: view
genes like me logo Genes that share phenotypes with STXBP2: view

Animal Models for STXBP2 Gene

MGI Knock Outs for STXBP2:

miRNA for STXBP2 Gene

miRTarBase miRNAs that target STXBP2

No data available for Enzyme Numbers (IUBMB) , Transcription Factor Targeting and HOMER Transcription for STXBP2 Gene

Localization for STXBP2 Gene

Subcellular locations from

Jensen Localization Image for STXBP2 Gene COMPARTMENTS Subcellular localization image for STXBP2 gene
Compartment Confidence
cytosol 5
lysosome 5
plasma membrane 5
vacuole 5
endoplasmic reticulum 1
mitochondrion 1
nucleus 1
peroxisome 1

Gene Ontology (GO) - Cellular Components for STXBP2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005829 cytosol IDA 18588921
GO:0005886 plasma membrane IDA 18588921
GO:0016324 apical plasma membrane IEA --
GO:0031201 colocalizes_with SNARE complex IDA 12773094
GO:0042581 specific granule IDA 18588921
genes like me logo Genes that share ontologies with STXBP2: view

No data available for Subcellular locations from UniProtKB/Swiss-Prot for STXBP2 Gene

Pathways for STXBP2 Gene

genes like me logo Genes that share pathways with STXBP2: view

Pathways by source for STXBP2 Gene

1 BioSystems pathway for STXBP2 Gene
1 GeneGo (Thomson Reuters) pathway for STXBP2 Gene

Gene Ontology (GO) - Biological Process for STXBP2 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0001909 leukocyte mediated cytotoxicity IMP 19884660
GO:0006887 exocytosis --
GO:0006904 vesicle docking involved in exocytosis IEA --
GO:0015031 protein transport IEA --
GO:0016192 vesicle-mediated transport --
genes like me logo Genes that share ontologies with STXBP2: view

Transcripts for STXBP2 Gene

Unigene Clusters for STXBP2 Gene

Syntaxin binding protein 2:
Representative Sequences:

Alternative Splicing Database (ASD) splice patterns (SP) for STXBP2 Gene

ExUns: 1 ^ 2a · 2b · 2c · 2d ^ 3 ^ 4a · 4b · 4c ^ 5 ^ 6a · 6b ^ 7 ^ 8 ^ 9 ^ 10 ^ 11 ^ 12a · 12b ^ 13 ^ 14 ^ 15a · 15b · 15c · 15d · 15e ^
SP1: - - - - -
SP2: - - - - - -
SP3: - - -
SP4: - -
SP5: - - -
SP6: - - - - - -
SP7: - - - - -

ExUns: 16a · 16b ^ 17a · 17b ^ 18 ^ 19 ^ 20
SP1: - -
SP2: - -
SP5: - - -
SP8: -

Relevant External Links for STXBP2 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for STXBP2 Gene

mRNA expression in normal human tissues for STXBP2 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for STXBP2 Gene

This gene is overexpressed in Whole Blood (24.9).

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, MOPED, and MaxQB for STXBP2 Gene

SOURCE GeneReport for Unigene cluster for STXBP2 Gene Hs.515104

mRNA Expression by UniProt/SwissProt for STXBP2 Gene

Tissue specificity: Placenta, lung, liver, kidney and pancreas, as well as in peripheral blood lymphocytes
genes like me logo Genes that share expressions with STXBP2: view

Orthologs for STXBP2 Gene

This gene was present in the common ancestor of animals and fungi.

Orthologs for STXBP2 Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia STXBP2 35
  • 97.25 (n)
  • 97.13 (a)
  • 97 (a)
(Bos Taurus)
Mammalia STXBP2 35
  • 88.65 (n)
  • 94.94 (a)
  • 95 (a)
(Canis familiaris)
Mammalia STXBP2 35
  • 88.93 (n)
  • 94.44 (a)
  • 94 (a)
(Mus musculus)
Mammalia Stxbp2 35
  • 87.8 (n)
  • 94.77 (a)
Stxbp2 16
Stxbp2 36
  • 95 (a)
(Monodelphis domestica)
Mammalia STXBP2 36
  • 72 (a)
(Ornithorhynchus anatinus)
Mammalia STXBP2 36
  • 66 (a)
(Rattus norvegicus)
Mammalia Stxbp2 35
  • 87.3 (n)
  • 94.77 (a)
(Anolis carolinensis)
Reptilia STXBP2 36
  • 71 (a)
African clawed frog
(Xenopus laevis)
Amphibia Xl.30298 35
tropical clawed frog
(Silurana tropicalis)
Amphibia stxbp2 35
  • 67.92 (n)
  • 69.62 (a)
(Danio rerio)
Actinopterygii Dr.7775 35
stxbp2 35
  • 68.81 (n)
  • 68.64 (a)
stxbp2 36
  • 68 (a)
fruit fly
(Drosophila melanogaster)
Insecta Rop 36
  • 55 (a)
Rop 37
  • 54 (a)
(Caenorhabditis elegans)
Secernentea unc-18 36
  • 46 (a)
unc-18 37
  • 53 (a)
T07A9.10 37
  • 31 (a)
A. gosspyii yeast
(Ashbya gossypii)
Saccharomycetes AGOS_AGL162C 35
  • 41.24 (n)
  • 28.65 (a)
baker's yeast
(Saccharomyces cerevisiae)
Saccharomycetes SEC1 35
  • 42.63 (n)
  • 30.02 (a)
SEC1 36
  • 21 (a)
SEC1 38
K. lactis yeast
(Kluyveromyces lactis)
Saccharomycetes KLLA0D17028g 35
  • 39.39 (n)
  • 29.41 (a)
bread mold
(Neurospora crassa)
Ascomycetes NCU08312 35
  • 47.18 (n)
  • 35.48 (a)
fission yeast
(Schizosaccharomyces pombe)
Schizosaccharomycetes sec1 35
  • 41.24 (n)
  • 31.99 (a)
sea squirt
(Ciona savignyi)
Ascidiacea -- 36
  • 53 (a)
Species with no ortholog for STXBP2:
  • Actinobacteria (Mycobacterium tuberculosis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • chicken (Gallus gallus)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)

Evolution for STXBP2 Gene

Gene Tree for STXBP2 (if available)
Gene Tree for STXBP2 (if available)

Paralogs for STXBP2 Gene

Paralogs for STXBP2 Gene

Selected SIMAP similar genes for STXBP2 Gene using alignment to 9 proteins:

genes like me logo Genes that share paralogs with STXBP2: view

Variants for STXBP2 Gene

Sequence variations from dbSNP and Humsavar for STXBP2 Gene

SNP ID Clin Chr 19 pos Sequence Context AA Info Type MAF
rs6791 - 7,647,391(+) CTGGC(A/G)TAGAA reference, missense, nc-transcript-variant
rs10001 -- 7,646,335(+) AAGGA(C/T)GTAAT synonymous-codon, reference, nc-transcript-variant
rs710951 -- 7,645,383(-) ACCAA(C/T)GGCCC intron-variant
rs794073 -- 7,647,699(-) GGGGA(A/C/T)GATGT intron-variant
rs794074 -- 7,647,588(-) GAGTC(C/T)AGACA intron-variant

Structural Variations from Database of Genomic Variants (DGV) for STXBP2 Gene

Variant ID Type Subtype PubMed ID
esv2751809 CNV Gain 17911159
nsv910970 CNV Loss 21882294
nsv833731 CNV Loss 17160897
nsv910979 CNV Loss 21882294
esv2718098 CNV Deletion 23290073

Relevant External Links for STXBP2 Gene

HapMap Linkage Disequilibrium report
Human Gene Mutation Database (HGMD)
Locus Specific Mutation Databases (LSDB)

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot for STXBP2 Gene

Disorders for STXBP2 Gene

MalaCards: The human disease database

MalaCards: The human disease database. (2) Diseases for STXBP2 Gene including...

Search for STXBP2 Gene in MalaCards »

(1) OMIM Diseases for STXBP2 Gene (601717)


  • Familial hemophagocytic lymphohistiocytosis 5 (FHL5) [MIM:613101]: A rare disorder characterized by immune dysregulation with hypercytokinemia, defective function of natural killer cell, and massive infiltration of several organs by activated lymphocytes and macrophages. The clinical features of the disease include fever, hepatosplenomegaly, cytopenia, and less frequently neurological abnormalities ranging from irritability and hypotonia to seizures, cranial nerve deficits and ataxia. {ECO:0000269 PubMed:19804848, ECO:0000269 PubMed:19884660}. Note=The disease is caused by mutations affecting the gene represented in this entry.

(1) University of Copenhagen DISEASES for STXBP2 Gene

Relevant External Links for STXBP2

genes like me logo Genes that share disorders with STXBP2: view

Publications for STXBP2 Gene

  1. Molecular characterization of a nonneuronal human UNC18 homolog. (PMID: 8921365) Ziegler S.F. … Mulligan J.T. (Genomics 1996) 2 3 4 23
  2. Familial hemophagocytic lymphohistiocytosis type 5 (FHL-5) is caused by mutations in Munc18-2 and impaired binding to syntaxin 11. (PMID: 19804848) zur Stadt U. … Hennies H.C. (Am. J. Hum. Genet. 2009) 3 4 23
  3. Munc18-2 deficiency causes familial hemophagocytic lymphohistiocytosis type 5 and impairs cytotoxic granule exocytosis in patient NK cells. (PMID: 19884660) Cote M. … de Saint Basile G. (J. Clin. Invest. 2009) 3 4 23
  4. Complete sequencing and characterization of 21,243 full-length human cDNAs. (PMID: 14702039) Ota T. … Sugano S. (Nat. Genet. 2004) 3 4
  5. Diversification of transcriptional modulation: large-scale identification and characterization of putative alternative promoters of human genes. (PMID: 16344560) Kimura K. … Sugano S. (Genome Res. 2006) 3

Products for STXBP2 Gene

  • DNA Methylation CpG Assay Predesigned for Pyrosequencing in human,mouse,rat
  • Pathway & Disease-focused RT² Profiler PCR Arrays
  • QIAGEN qRT-PCR Assays for microRNAs that regulate STXBP2
    • QuantiTect SYBR Green Assays in human,mouse,rat
    • Pre-validated RT² qPCR Primer Assay in human,mouse,rat
    • QuantiFast Probe-based Assays in human,mouse,rat
    • Predesigned siRNA for gene silencing in human,mouse,rat for STXBP2
    • Block miRNA regulation of STXBP2 using miScript Target Protectors

    Sources for STXBP2 Gene

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