chr22-50720865-G-C

Variant names:

• chr22-50720865-G-C
• rs767058690
• NM_001372044.2:c.3218G>C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4 BP6_Moderate

The NM_001372044.2(SHANK3):​c.3218G>C​(p.Gly1073Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1073V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SHANK3 NM_001372044.2 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 6.26

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]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29223213).
• BP6: Variant 22-50720865-G-C is Benign according to our data. Variant chr22-50720865-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 1198776.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SHANK3	NM_001372044.2	c.3218G>C	p.Gly1073Ala	missense_variant	Exon 24 of 25		NP_001358973.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SHANK3	ENST00000262795.7	c.2633G>C	p.Gly878Ala	missense_variant	Exon 20 of 22	5		ENSP00000489147.3
SHANK3	ENST00000445220.7	c.1685G>C	p.Gly562Ala	missense_variant	Exon 11 of 13	5
SHANK3	ENST00000664402.2	c.1175G>C	p.Gly392Ala	missense_variant	Exon 5 of 7			ENSP00000499475.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1224236 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 595206

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Feb 01, 2021

GeneDx

Significance: Likely benign

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 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.025	.;T
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.22
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.77	T;T
M_CAP	Benign	0.071	D
MetaRNN	Benign	0.29	T;T
MetaSVM	Benign	-0.78	T
PrimateAI	Pathogenic	0.86	D
REVEL	Benign	0.19
Sift4G	Benign	0.63	T;T
Vest4		0.23
GERP RS		3.0
gMVP		0.14

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

LitVar

Other links and lift over

dbSNP: rs767058690; hg19: chr22-51159293;