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GoPubMed Proteins lists recent and important papers and reviews for proteins. Page last changed on 18 Mar 2014.

Synaptic Ras GTPase activating protein 1

Syngap, SYNGAP1, p135 SynGAP, KIAA1938, synaptic RasGAP
The protein encoded by this gene is a major component of the postsynaptic density (PSD), a group of proteins found associated with NMDA receptors at synapses. The encoded protein is phosphorylated by calmodulin-dependent protein kinase II and dephosphorylated by NMDA receptor activation. Defects in this gene are a cause of mental retardation autosomal dominant type 5 (MRD5). [provided by RefSeq, Dec 2009] (from NCBI)
Top mentioned proteins: CAN, CaM, PSD-95, HAD, GAP
Papers on Syngap
Targeted resequencing in epileptic encephalopathies identifies de novo mutations in CHD2 and SYNGAP1.
Mefford et al., Seattle, United States. In Nat Genet, Jul 2013
We show that de novo CHD2 and SYNGAP1 mutations are new causes of epileptic encephalopathies, accounting for 1.2% and 1% of cases, respectively.
6p21.3 microdeletion involving the SYNGAP1 gene in a patient with intellectual disability, seizures, and severe speech impairment.
Knegt et al., Ljubljana, Slovenia. In Am J Med Genet A, Jul 2013
There were four genes identified in this deletion, of which SYNGAP1 is considered to be responsible for speech impairment and epilepsy.
SYNGAP1 links the maturation rate of excitatory synapses to the duration of critical-period synaptic plasticity.
Rumbaugh et al., Jupiter, United States. In J Neurosci, Jul 2013
In this study, we demonstrate that inactivation of a single copy of syngap1, which causes a surprisingly common form of sporadic, non-syndromic intellectual disability with autism in humans, induced widespread early functional maturation of excitatory connections in the mouse neocortex.
Epilepsy associated with autism and attention deficit hyperactivity disorder: Is there a genetic link?
Curatolo et al., Roma, Italy. In Brain Dev, Jun 2013
The majority of the candidate genes are involved in synaptic formation/remodeling/maintenance (NRX1, CNTN4, DCLK2, CNTNAP2, TRIM32, ASTN2, CTNTN5, SYN1), neurotransmission (SYNGAP1, GABRG1, CHRNA7), or DNA methylation/chromatin remodeling (MBD5).
The MEF2 family and the brain: from molecules to memory.
Dietrich, Strasbourg, France. In Cell Tissue Res, May 2013
Among them are immediate-early genes such as C-JUN and NUR77 and neuronal-activity-regulated genes such as ARC, SYNGAP, HOMER1A and BDNF.
Mutations in SYNGAP1 cause intellectual disability, autism, and a specific form of epilepsy by inducing haploinsufficiency.
Di Cristo et al., Montréal, Canada. In Hum Mutat, Feb 2013
De novo mutations in SYNGAP1, which codes for a RAS/RAP GTP-activating protein, cause nonsyndromic intellectual disability (NSID).
Camkii-mediated phosphorylation regulates distributions of Syngap-α1 and -α2 at the postsynaptic density.
Dosemeci et al., Bethesda, United States. In Plos One, 2012
SynGAP, a protein abundant at the postsynaptic density (PSD) of glutamatergic neurons, is known to modulate synaptic strength by regulating the incorporation of AMPA receptors at the synapse.
Expression of non-protein-coding antisense RNAs in genomic regions related to autism spectrum disorders.
Faghihi et al., Miami, United States. In Mol Autism, 2012
Interestingly, the antisense RNA corresponding to the SYNGAP1 locus (SYNGAP1-AS) was found to be differentially expressed in brain regions of patients with ASD compared to control individuals.
Range of genetic mutations associated with severe non-syndromic sporadic intellectual disability: an exome sequencing study.
Strom et al., Zürich, Switzerland. In Lancet, 2012
16 patients carried de-novo variants in known intellectual disability genes with three recurrently mutated genes (STXBP1, SYNGAP1, and SCN2A).
Pathogenic SYNGAP1 mutations impair cognitive development by disrupting maturation of dendritic spine synapses.
Rumbaugh et al., Jupiter, United States. In Cell, 2012
In the SYNGAP1 mouse model of ID/ASD, we found that dendritic spine synapses develop prematurely during the early postnatal period.
Potential opposite roles of the extracellular signal-regulated kinase (ERK) pathway in autism spectrum and bipolar disorders.
Kalkman, Basel, Switzerland. In Neurosci Biobehav Rev, 2012
In particular, a gain of function mutation in the CACNA1C gene, deletions and disruption of the SYNGAP1 gene, a copy number variation encompassing the MAPK3 gene and a duplication of YWHAE indicate that in a subset of autism patients the ERK cascade is inappropriately activated.
Haploinsufficiency of ARID1B, a member of the SWI/SNF-a chromatin-remodeling complex, is a frequent cause of intellectual disability.
Reis et al., Nürnberg, Germany. In Am J Hum Genet, 2012
Just recently, de novo mutations in SYNGAP1, STXBP1, MEF2C, and GRIN2B were reported as relatively common causes of ID in such individuals.
SynGAP isoforms exert opposing effects on synaptic strength.
Kind et al., Edinburgh, United Kingdom. In Nat Commun, 2011
Overexpression of SynGAP alpha1 versus alpha2 C-termini-containing proteins in hippocampal neurons has opposing effects on synaptic strength, decreasing and increasing miniature excitatory synaptic currents amplitude/frequency, respectively.
Molecular and behavioral changes associated with adult hippocampus-specific SynGAP1 knockout.
Knuesel et al., China. In Learn Mem, 2011
This study demonstrated the functional significance of SynGAP1 signaling in the adult brain by capturing several changes that are dependent on NMDAR and hippocampal integrity.
A balanced translocation disrupts SYNGAP1 in a patient with intellectual disability, speech impairment, and epilepsy with myoclonic absences (EMA).
Tommerup et al., Denmark. In Epilepsia, 2011
We mapped the translocation breakpoints by fluorescence in situ hybridization (FISH), and the breakpoint at 6p21.32 was found to truncate the N-methyl-d-aspartate (NMDA)-receptor associated gene SYNGAP1.
SynGAP moves out of the core of the postsynaptic density upon depolarization.
Dosemeci et al., Bethesda, United States. In Neuroscience, 2011
Here, we characterize the distribution of SynGAP at the postsynaptic density under basal and depolarizing conditions in rat hippocampal neuronal cultures.
Reduced expression of SynGAP, a neuronal GTPase-activating protein, enhances capsaicin-induced peripheral sensitization.
Hingtgen et al., Indianapolis, United States. In J Neurophysiol, 2011
SynGAP is an important regulator of the release of the neuropeptide calcitonin gene-related peptide from primary sensory neurons and can modulate capsaicin-induced hypernociception.
De novo autosomal dominant mutation in SYNGAP1.
Cook, Chicago, United States. In Autism Res, 2011
SYNGAP1 is a brain-specific protein that interacts with key components of the proteins involved in experience-dependent changes in glutamate synapses involved in learning.
Functional impact of global rare copy number variation in autism spectrum disorders.
Betancur et al., Toronto, Canada. In Nature, 2010
Among the CNVs there were numerous de novo and inherited events, sometimes in combination in a given family, implicating many novel ASD genes such as SHANK2, SYNGAP1, DLGAP2 and the X-linked DDX53-PTCHD1 locus.
Mutations in SYNGAP1 in autosomal nonsyndromic mental retardation.
Synapse to Disease Group et al., Montréal, Canada. In N Engl J Med, 2009
Results indicate that SYNGAP1 disruption is a cause of autosomal dominant nonsyndromic mental retardation.
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