22-50695152-C-G

Variant names:

• chr22-50695152-C-G
• rs2341009
• NM_001372044.2:c.1527+106C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001372044.2(SHANK3):​c.1527+106C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000846 in 1,181,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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: 31)
  • Exomes 𝑓: 8.5e-7 (0 hom.)
• Consequence: SHANK3 NM_001372044.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.68
• Publications: 0 publications found

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: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, ClinGen, Laboratory for Molecular Medicine
• schizophrenia 15

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SHANK3	NM_001372044.2	MANE Select	c.1527+106C>G		intron	N/A	NP_001358973.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SHANK3	ENST00000692848.2		c.1529+104C>G		intron	N/A	ENSP00000510794.2	A0A8I5KZC4
	SHANK3	ENST00000262795.8	TSL:5	c.947+104C>G		intron	N/A	ENSP00000489147.3	A0A0U1RQS4
	SHANK3	ENST00000414786.8	TSL:5	n.1531+104C>G		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 8.46e-7 AC: 1 AN: 1181836 Hom.: 0 AF XY: 0.00000173 AC XY: 1 AN XY: 578528

African (AFR) AF: 0.00 AC: 0 AN: 26562

American (AMR) AF: 0.0000413 AC: 1 AN: 24220

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18870

East Asian (EAS) AF: 0.00 AC: 0 AN: 34220

South Asian (SAS) AF: 0.00 AC: 0 AN: 62098

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 42142

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3548

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 920370

Other (OTH) AF: 0.00 AC: 0 AN: 49806

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	0.76
DANN	Benign	0.72
PhyloP100		-1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs2341009;

hg19: chr22-51133580;