22-50721350-G-T

Variant names:

• chr22-50721350-G-T
• rs139686326
• NM_001372044.2:c.3703G>T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001372044.2(SHANK3):​c.3703G>T​(p.Ala1235Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,460,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/13 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SHANK3 NM_001372044.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.248

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06946105).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SHANK3	NM_001372044.2	c.3703G>T	p.Ala1235Ser	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.3118G>T	p.Ala1040Ser	missense_variant	Exon 20 of 22	5		ENSP00000489147.3
SHANK3	ENST00000445220.7	c.2170G>T	p.Ala724Ser	missense_variant	Exon 11 of 13	5
SHANK3	ENST00000664402.2	c.1660G>T	p.Ala554Ser	missense_variant	Exon 5 of 7			ENSP00000499475.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1460956 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 726792

Gnomad4 AFR exome AF: 0.0000299

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

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.50
CADD	Benign	15
DANN	Benign	0.92
DEOGEN2	Benign	0.012	.;T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.39
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.75	T;T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.069	T;T
MetaSVM	Benign	-1.0	T
PrimateAI	Uncertain	0.75	T
REVEL	Benign	0.094
Sift4G	Benign	0.72	T;T
Vest4		0.15
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.12

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs139686326; hg19: chr22-51159778;