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Protein STXBP1 PDB 1dn1.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases STXBP1, MUNC18-1, NSEC1, P67, RBSEC1, UNC18, syntaxin binding protein 1
External IDs MGI: 107363 HomoloGene: 2382 GeneCards: STXBP1
Gene location (Human)
Chromosome 9 (human)
Chr. Chromosome 9 (human)[1]
Chromosome 9 (human)
Genomic location for STXBP1
Genomic location for STXBP1
Band 9q34.11 Start 127,579,370 bp[1]
End 127,696,027 bp[1]
RNA expression pattern
PBB GE STXBP1 202260 s at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 9: 127.58 – 127.7 Mb Chr 9: 32.79 – 32.85 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Syntaxin-binding protein 1 (also known as Munc18-1) is a protein that in humans is encoded by the STXBP1 gene.[5][6]

In melanocytic cells STXBP1 gene expression may be regulated by MITF.[7]

This gene was initially discovered in 2008 as cause for Ohtahara Syndrome. Ever since, it has become one of the most prominent genes for epileptic encephalopathies so far.[8]


STXBP1 has been shown to interact with STX2,[9][10] STX4[9][10] and STX1A.[10][11][12][13][14]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000136854 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000026797 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ Swanson DA, Steel JM, Valle D (Jun 1998). "Identification and characterization of the human ortholog of rat STXBP1, a protein implicated in vesicle trafficking and neurotransmitter release". Genomics. 48 (3): 373–6. doi:10.1006/geno.1997.5202. PMID 9545644. 
  6. ^ "Entrez Gene: STXBP1 syntaxin binding protein 1". 
  7. ^ Hoek KS, Schlegel NC, Eichhoff OM, Widmer DS, Praetorius C, Einarsson SO, Valgeirsdottir S, Bergsteinsdottir K, Schepsky A, Dummer R, Steingrimsson E (2008). "Novel MITF targets identified using a two-step DNA microarray strategy". Pigment Cell Melanoma Res. 21 (6): 665–76. doi:10.1111/j.1755-148X.2008.00505.x. PMID 19067971. 
  8. ^ STXBP1 – this is what you need to know in 2015
  9. ^ a b Schraw TD, Lemons PP, Dean WL, Whiteheart SW (Aug 2003). "A role for Sec1/Munc18 proteins in platelet exocytosis". Biochem. J. 374 (Pt 1): 207–17. doi:10.1042/BJ20030610. PMC 1223584Freely accessible. PMID 12773094. 
  10. ^ a b c Hata Y, Südhof TC (Jun 1995). "A novel ubiquitous form of Munc-18 interacts with multiple syntaxins. Use of the yeast two-hybrid system to study interactions between proteins involved in membrane traffic". J. Biol. Chem. 270 (22): 13022–8. doi:10.1074/jbc.270.22.13022. PMID 7768895. 
  11. ^ Bhaskar K, Shareef MM, Sharma VM, Shetty AP, Ramamohan Y, Pant HC, Raju TR, Shetty KT (Jan 2004). "Co-purification and localization of Munc18-1 (p67) and Cdk5 with neuronal cytoskeletal proteins". Neurochem. Int. 44 (1): 35–44. doi:10.1016/S0197-0186(03)00099-8. PMID 12963086. 
  12. ^ Dulubova I, Sugita S, Hill S, Hosaka M, Fernandez I, Südhof TC, Rizo J (Aug 1999). "A conformational switch in syntaxin during exocytosis: role of munc18". EMBO J. 18 (16): 4372–82. doi:10.1093/emboj/18.16.4372. PMC 1171512Freely accessible. PMID 10449403. 
  13. ^ McMahon HT, Missler M, Li C, Südhof TC (Oct 1995). "Complexins: cytosolic proteins that regulate SNAP receptor function". Cell. 83 (1): 111–9. doi:10.1016/0092-8674(95)90239-2. PMID 7553862. 
  14. ^ Pérez-Brangulí F, Muhaisen A, Blasi J (Jun 2002). "Munc 18a binding to syntaxin 1A and 1B isoforms defines its localization at the plasma membrane and blocks SNARE assembly in a three-hybrid system assay". Mol. Cell. Neurosci. 20 (2): 169–80. doi:10.1006/mcne.2002.1122. PMID 12093152. 

Further reading[edit]