rs753645263

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4BP6

The NM_006772.3(SYNGAP1):c.3181G>T(p.Gly1061Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000373 in 1,608,486 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1061S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SYNGAP1
NM_006772.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 1.84

Publications

0 publications found

Variant links:

Genes affected

SYNGAP1 (HGNC:11497): (synaptic Ras GTPase activating protein 1) This gene encodes a Ras GTPase activating protein that is a member of the N-methyl-D-aspartate receptor complex. The N-terminal domain of the protein contains a Ras-GAP domain, a pleckstrin homology domain, and a C2 domain that may be involved in binding of calcium and phospholipids. The C-terminal domain consists of a ten histidine repeat region, serine and tyrosine phosphorylation sites, and a T/SXV motif required for postsynaptic scaffold protein interaction. The encoded protein negatively regulates Ras, Rap and alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor trafficking to the postsynaptic membrane to regulate synaptic plasticity and neuronal homeostasis. Allelic variants of this gene are associated with intellectual disability and autism spectrum disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2016]

SYNGAP1 links:

SYNGAP1-AS1 (HGNC:53831): (SYNGAP1 antisense RNA 1)

SYNGAP1-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.32653344).

BP6

Variant 6-33443733-G-T is Benign according to our data. Variant chr6-33443733-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 536997.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNGAP1	NM_006772.3 link	c.3181G>T	p.Gly1061Cys	missense_variant	Exon 15 of 19	ENST00000646630.1	NP_006763.2	Q96PV0-1A0A1U9X8L0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SYNGAP1	ENST00000646630.1 link	c.3181G>T	p.Gly1061Cys	missense_variant	Exon 15 of 19		NM_006772.3	ENSP00000496007.1	Q96PV0-1
SYNGAP1	ENST00000644458.1 link	c.3181G>T	p.Gly1061Cys	missense_variant	Exon 15 of 19			ENSP00000495541.1	A0A2R8Y6T2
SYNGAP1	ENST00000449372.7 link	c.3139G>T	p.Gly1047Cys	missense_variant	Exon 14 of 18	5		ENSP00000416519.4	B7ZCA0
SYNGAP1	ENST00000418600.7 link	c.3181G>T	p.Gly1061Cys	missense_variant	Exon 15 of 19	5		ENSP00000403636.3	Q96PV0-2
SYNGAP1	ENST00000645250.1 link	c.3004G>T	p.Gly1002Cys	missense_variant	Exon 13 of 17			ENSP00000494861.1	A0A2R8YDS2

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000126

AC:

AN:

238054

AF XY:

0.0000152

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000878

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1456318

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723586

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33412

American (AMR)

AF:

0.0000673

AC:

AN:

44606

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26020

East Asian (EAS)

AF:

0.00

AC:

AN:

39578

South Asian (SAS)

AF:

0.00

AC:

AN:

86154

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51720

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108932

Other (OTH)

AF:

0.00

AC:

AN:

60162

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.592

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74324

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41438

American (AMR)

AF:

0.000196

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.00000838

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Nov 30, 2021

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Intellectual disability, autosomal dominant 5

Benign:1

Nov 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.035

BayesDel_noAF

Benign

-0.090

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.065

T;T;.;.;.;.;.;.

Eigen

Benign

-0.047

Eigen_PC

Benign

-0.11

FATHMM_MKL

Benign

0.51

LIST_S2

Benign

0.85

.;D;D;D;D;D;D;D

M_CAP

Pathogenic

0.96

MetaRNN

Benign

0.33

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.32

MutationAssessor

Benign

1.1

L;L;.;.;L;L;.;.

PhyloP100

1.8

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.3

.;.;.;N;.;N;N;.

REVEL

Uncertain

0.41

Sift

Uncertain

0.011

.;.;.;D;.;D;D;.

Sift4G

Uncertain

0.013

.;D;.;D;D;D;D;.

Polyphen

0.94

P;P;.;.;P;D;.;.

Vest4

0.47, 0.46, 0.49, 0.43

MutPred

0.29

Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);.;Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);.;.;

MVP

0.69

MPC

1.8

ClinPred

0.43

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

3.2

Varity_R

0.17

gMVP

0.51

Mutation Taster

=90/10

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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rs753645263

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over