Developmental Brain Disorder Gene Database

Missense Gene





HGNC:11444 (protein-coding gene)

syntaxin binding protein 1

Unique Cases:
Last Updated:
September 1, 2022

Gene Summary:

Gene Function
Participates in the regulation of synaptic vesicle docking and fusion through interaction with GTP-binding proteins (By similarity). Essential for neurotransmission and binds syntaxin, a component of the synaptic vesicle fusion machinery probably in a 1:1 ratio. Can interact with syntaxins 1, 2, and 3 but not syntaxin 4. May play a role in determining the specificity of intracellular fusion reactions. {ECO:0000250|UniProtKB:P61765}. (Source: Uniprot)
Previous symbols
No previous symbols
Alias symbols
hUNC18, MUNC18-1, UNC18, rbSec1, nSec1
Chromosomal Location
Genomic Coordinates
Associated Disorders
Intellectual Disability, Autism, Epilepsy, Attention Deficit Hyperactivity Disorder, Cerebral Palsy

Predictive Scores:

HI Score (Decipher)


pLI (gnomAD)


LOEUF (gnomAD)


Classifications from External Sources:



DDG2P Classification (DDG2P)


ClinGen Classification (ClinGen)


GenCC Classification (GenCC)

Definitive3 Supportive6 Limited2


Guo H et. al., Genome sequencing identifies multiple deleterious variants in autism patients with more severe phenotypes., Genet Med, 2019
Na JH et. al., Targeted gene panel sequencing in early infantile onset developmental and epileptic encephalopathy., Brain Dev, 2020
Wang J et. al., The diagnostic yield of intellectual disability: combined whole genome low-coverage sequencing and medical exome sequencing., BMC Med Genomics, 2020
Yamamoto T et. al., Genomic backgrounds of Japanese patients with undiagnosed neurodevelopmental disorders., Brain Dev, 2019
Papuc SM et. al., The role of recessive inheritance in early-onset epileptic encephalopathies: a combined whole-exome sequencing and copy number study., Eur J Hum Genet, 2019
Arafat A et. al., Unexplained Early Infantile Epileptic Encephalopathy in Han Chinese Children: Next-Generation Sequencing and Phenotype Enriching., Sci Rep, 2017
Stojanovic JR et. al., Diagnostic and Clinical Utility of Clinical Exome Sequencing in Children With Moderate and Severe Global Developmental Delay / Intellectual Disability., J Child Neurol, 2020
Peng J et. al., Next-generation sequencing improves treatment efficacy and reduces hospitalization in children with drug-resistant epilepsy., CNS Neurosci Ther, 2019
Yang L et. al., Clinical and genetic spectrum of a large cohort of children with epilepsy in China., Genet Med, 2019
Yuskaitis CJ et. al., Infantile Spasms of Unknown Cause: Predictors of Outcome and Genotype-Phenotype Correlation., Pediatr Neurol, 2018
Long S et. al., The Clinical and Genetic Features of Co-occurring Epilepsy and Autism Spectrum Disorder in Chinese Children., Front Neurol, 2019
Fernández-Marmiesse A et. al., Rare Variants in 48 Genes Account for 42% of Cases of Epilepsy With or Without Neurodevelopmental Delay in 246 Pediatric Patients., Front Neurosci, 2019
Chérot E et. al., Using medical exome sequencing to identify the causes of neurodevelopmental disorders: Experience of 2 clinical units and 216 patients., Clin Genet, 2018
Cogliati F et. al., Pathogenic Variants in STXBP1 and in Genes for GABAa Receptor Subunities Cause Atypical Rett/Rett-like Phenotypes., Int J Mol Sci, 2019
Beighley JS et. al., Clinical Phenotypes of Carriers of Mutations in CHD8 or Its Conserved Target Genes., Biol Psychiatry, 2020
Takata A et. al., Comprehensive analysis of coding variants highlights genetic complexity in developmental and epileptic encephalopathy., Nat Commun, 2019
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NCBI: Gene

Integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.

Gene Reviews

An international point-of-care resource for busy clinicians, provides clinically relevant and medically actionable information for inherited conditions in a standardized journal-style format, covering diagnosis, management, and genetic counseling for patients and their families.


DECIPHER (DatabasE of genomiC varIation and Phenotype in Humans using Ensembl Resources) is an interactive web-based database which incorporates a suite of tools designed to aid the interpretation of genomic variants. DECIPHER enhances clinical diagnosis by retrieving information from a variety of bioinformatics resources relevant to the variant found in the patient.


SFARI Gene is an evolving online database designed to permit quick entrée into the genetics of autism, and to help researchers track the ever-expanding genetic risk factors that emerge in the literature.


ClinGen is a National Institutes of Health (NIH)-funded resource dedicated to building an authoritative central resource that defines the clinical relevance of genes and variants for use in precision medicine and research.


The GenCC DB provides information pertaining to the validity of gene-disease relationships, with a current focus on Mendelian diseases.


The Genome Aggregation Database (gnomAD) is a resource developed by an international coalition of investigators, with the goal of aggregating and harmonizing both exome and genome sequencing data from a wide variety of large-scale sequencing projects, and making summary data available for the wider scientific community.
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