Genetic Variant SHANK3:p.Glu764* (chr22-50706146-G-T) – ACMG Classification: Pathogenic (12 pts)

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_001372044.2(SHANK3):c.2290G>T(p.Glu764*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

SHANK3
NM_001372044.2 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 9.73

Publications

1 publications found

Variant links:

Genes affected

SHANK3 (HGNC:14294): (SH3 and multiple ankyrin repeat domains 3) This gene is a member of the Shank gene family. Shank proteins are multidomain scaffold proteins of the postsynaptic density that connect neurotransmitter receptors, ion channels, and other membrane proteins to the actin cytoskeleton and G-protein-coupled signaling pathways. Shank proteins also play a role in synapse formation and dendritic spine maturation. Mutations in this gene are a cause of autism spectrum disorder (ASD), which is characterized by impairments in social interaction and communication, and restricted behavioral patterns and interests. Mutations in this gene also cause schizophrenia type 15, and are a major causative factor in the neurological symptoms of 22q13.3 deletion syndrome, which is also known as Phelan-McDermid syndrome. Additional isoforms have been described for this gene but they have not yet been experimentally verified. [provided by RefSeq, Mar 2012]

SHANK3 Gene-Disease associations (from GenCC):

Phelan-McDermid syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), ClinGen
schizophrenia 15
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

SHANK3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 22-50706146-G-T is Pathogenic according to our data. Variant chr22-50706146-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 430433.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001372044.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SHANK3	NM_001372044.2	MANE Select	c.2290G>T	p.Glu764*	stop_gained	Exon 20 of 25	NP_001358973.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SHANK3	ENST00000692848.2		c.2287G>T	p.Glu763*	stop_gained	Exon 18 of 23	ENSP00000510794.2
SHANK3	ENST00000262795.8	TSL:5	c.1705G>T	p.Glu569*	stop_gained	Exon 16 of 21	ENSP00000489147.3
SHANK3	ENST00000664402.3		c.247G>T	p.Glu83*	stop_gained	Exon 1 of 6	ENSP00000499475.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1401360

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

691406

African (AFR)

AF:

0.00

AC:

AN:

31702

American (AMR)

AF:

0.00

AC:

AN:

36046

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25222

East Asian (EAS)

AF:

0.00

AC:

AN:

35902

South Asian (SAS)

AF:

0.00

AC:

AN:

79316

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49262

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5688

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1080104

Other (OTH)

AF:

0.00

AC:

AN:

58118

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Sep 25, 2019

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed in large population cohorts (Lek et al., 2016); Has not been previously published as pathogenic or benign to our knowledge

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

1.1

Eigen_PC

Pathogenic

0.97

FATHMM_MKL

Pathogenic

1.0

PhyloP100

9.7

Vest4

0.91

GERP RS

5.3

Mutation Taster

=0/200

disease causing (ClinVar)

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over