NM_006772.3(SYNGAP1):c.2516dup (p.Ser840fs) AND Intellectual disability, autosomal dominant 5

Germline classification:: Pathogenic (1 submission)
Last evaluated:: Mar 22, 2022
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV001957450.4

Allele description [Variation Report for NM_006772.3(SYNGAP1):c.2516dup (p.Ser840fs)]

NM_006772.3(SYNGAP1):c.2516dup (p.Ser840fs)

Genes:

SYNGAP1-AS1:SYNGAP1 antisense RNA 1 [Gene - HGNC]
SYNGAP1:synaptic Ras GTPase activating protein 1 [Gene - OMIM - HGNC]

Variant type:

Duplication

Cytogenetic location:

6p21.32

Genomic location:

Preferred name:

NM_006772.3(SYNGAP1):c.2516dup (p.Ser840fs)

HGVS:

NC_000006.12:g.33443068dup
NG_016137.2:g.27999dup
NM_001130066.2:c.2474dup
NM_006772.3:c.2516dupMANE SELECT
NP_001123538.1:p.Ser826fs
NP_006763.2:p.Ser840fs
LRG_1193t1:c.2516dup
LRG_1193:g.27999dup
LRG_1193p1:p.Ser840fs
NC_000006.11:g.33410843_33410844insA
NC_000006.11:g.33410845dup

Protein change:

S826fs

Links:

dbSNP: rs2151188291

NCBI 1000 Genomes Browser:

rs2151188291

Molecular consequence:

NM_001130066.2:c.2474dup - frameshift variant - [Sequence Ontology: SO:0001589]
NM_006772.3:c.2516dup - frameshift variant - [Sequence Ontology: SO:0001589]

Condition(s)

Name:: Intellectual disability, autosomal dominant 5 (MRD5)
Synonyms:: INTELLECTUAL DEVELOPMENTAL DISORDER, AUTOSOMAL DOMINANT 5
Identifiers:: MONDO: MONDO:0012960; MedGen: C2675473; OMIM: 612621

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gi|1519313577|ref|NM_006336.4|

Nucleotide

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002206144	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Mar 22, 2022)	germline	clinical testing	PubMed (4) [See all records that cite these PMIDs] 23161826, 23708187, 26989088, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002206144

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Pathogenic
(Mar 22, 2022)

germline

clinical testing

PubMed (4)
[See all records that cite these PMIDs]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Mutations in SYNGAP1 cause intellectual disability, autism, and a specific form of epilepsy by inducing haploinsufficiency.

Berryer MH, Hamdan FF, Klitten LL, Møller RS, Carmant L, Schwartzentruber J, Patry L, Dobrzeniecka S, Rochefort D, Neugnot-Cerioli M, Lacaille JC, Niu Z, Eng CM, Yang Y, Palardy S, Belhumeur C, Rouleau GA, Tommerup N, Immken L, Beauchamp MH, Patel GS, Majewski J, et al.

Hum Mutat. 2013 Feb;34(2):385-94. doi: 10.1002/humu.22248. Epub 2012 Dec 12.

PubMed [citation]

PMID:: 23161826

Targeted resequencing in epileptic encephalopathies identifies de novo mutations in CHD2 and SYNGAP1.

Carvill GL, Heavin SB, Yendle SC, McMahon JM, O'Roak BJ, Cook J, Khan A, Dorschner MO, Weaver M, Calvert S, Malone S, Wallace G, Stanley T, Bye AM, Bleasel A, Howell KB, Kivity S, Mackay MT, Rodriguez-Casero V, Webster R, Korczyn A, Afawi Z, et al.

Nat Genet. 2013 Jul;45(7):825-30. doi: 10.1038/ng.2646. Epub 2013 May 26.

PubMed [citation]

PMID:: 23708187
PMCID:: PMC3704157

See all PubMed Citations (4)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002206144.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (4)

Description

For these reasons, this variant has been classified as Pathogenic. This variant has not been reported in the literature in individuals affected with SYNGAP1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Ser840Glufs*10) in the SYNGAP1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SYNGAP1 are known to be pathogenic (PMID: 23161826, 23708187, 26989088).

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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