22-50674573-CCG-C

Position:

• chr22-50674573-CCG-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 8P and 10B. PVS1 BP6_Moderate BA1

The NM_001372044.2(SHANK3):​c.165+1_166-1del variant causes a frameshift, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 1 in 495,308 control chromosomes in the GnomAD database, including 247,564 homozygotes. Variant has been reported in ClinVar as Benign (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 1.0 (69755 hom., cov: 0)
  • Exomes 𝑓: 1.0 (177809 hom.)
• Consequence: SHANK3 NM_001372044.2 frameshift, splice_region
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.584

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 -2 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• BP6: Variant 22-50674573-CCG-C is Benign according to our data. Variant chr22-50674573-CCG-C is described in ClinVar as [Benign]. Clinvar id is 1237741.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.993 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SHANK3	NM_001372044.2	c.165+1_166-1del		frameshift_variant, splice_region_variant	2/25	ENST00000710353.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SHANK3	ENST00000692848.1	c.-62_-61del		5_prime_UTR_variant	1/10
SHANK3	ENST00000414786.7	n.166_167del		non_coding_transcript_exon_variant	1/23	5
SHANK3	ENST00000673971.2	c.-62_-61del		5_prime_UTR_variant, NMD_transcript_variant	1/23

Frequencies

GnomAD3 genomes AF: 1.00 AC: 139482 AN: 139490 Hom.: 69737 Cov.: 0

Gnomad AFR AF: 1.00

Gnomad AMI AF: 1.00

Gnomad AMR AF: 1.00

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 1.00

GnomAD4 exome AF: 1.00 AC: 355697 AN: 355782 Hom.: 177809 AF XY: 1.00 AC XY: 168082 AN XY: 168122

Gnomad4 AFR exome AF: 0.999

Gnomad4 AMR exome AF: 0.998

Gnomad4 ASJ exome AF: 1.00

Gnomad4 EAS exome AF: 1.00

Gnomad4 SAS exome AF: 1.00

Gnomad4 FIN exome AF: 1.00

Gnomad4 NFE exome AF: 1.00

Gnomad4 OTH exome AF: 1.00

GnomAD4 genome AF: 1.00 AC: 139518 AN: 139526 Hom.: 69755 Cov.: 0 AF XY: 1.00 AC XY: 67687 AN XY: 67692

Gnomad4 AFR AF: 1.00

Gnomad4 AMR AF: 1.00

Gnomad4 ASJ AF: 1.00

Gnomad4 EAS AF: 1.00

Gnomad4 SAS AF: 1.00

Gnomad4 FIN AF: 1.00

Gnomad4 NFE AF: 1.00

Gnomad4 OTH AF: 1.00

Alfa AF: 1.00 Hom.: 8140

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jul 27, 2018

- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs566877404; hg19: chr22-51113001;