chr22-50675030-G-A

Position:

• chr22-50675030-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The ENST00000262795.7(SHANK3):​c.-312G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0034 in 1,525,648 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0022 (1 hom., cov: 31)
  • Exomes 𝑓: 0.0035 (14 hom.)
• Consequence: SHANK3 ENST00000262795.7 5_prime_UTR
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -1.46

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 Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 22-50675030-G-A is Benign according to our data. Variant chr22-50675030-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 445941.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0022 (334/151568) while in subpopulation AMR AF= 0.00439 (67/15266). AF 95% confidence interval is 0.00355. There are 1 homozygotes in gnomad4. There are 149 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 334 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SHANK3	NM_001372044.2	c.289-18G>A		intron_variant		ENST00000710353.1	NP_001358973.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SHANK3	ENST00000262795.7	c.-312G>A		5_prime_UTR_variant	1/22	5		ENSP00000489147	P1

Frequencies

GnomAD3 genomes AF: 0.00221 AC: 334 AN: 151454 Hom.: 1 Cov.: 31

Gnomad AFR AF: 0.00143

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00439

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00105

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00284

Gnomad OTH AF: 0.00240

GnomAD3 exomes AF: 0.00229 AC: 288 AN: 125692 Hom.: 0 AF XY: 0.00226 AC XY: 156 AN XY: 68930

Gnomad AFR exome AF: 0.00120

Gnomad AMR exome AF: 0.00451

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000615

Gnomad NFE exome AF: 0.00329

Gnomad OTH exome AF: 0.00465

GnomAD4 exome AF: 0.00354 AC: 4858 AN: 1374080 Hom.: 14 Cov.: 31 AF XY: 0.00334 AC XY: 2260 AN XY: 676782

Gnomad4 AFR exome AF: 0.00100

Gnomad4 AMR exome AF: 0.00437

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.000921

Gnomad4 NFE exome AF: 0.00417

Gnomad4 OTH exome AF: 0.00294

GnomAD4 genome AF: 0.00220 AC: 334 AN: 151568 Hom.: 1 Cov.: 31 AF XY: 0.00201 AC XY: 149 AN XY: 74058

Gnomad4 AFR AF: 0.00142

Gnomad4 AMR AF: 0.00439

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00105

Gnomad4 NFE AF: 0.00284

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.00223 Hom.: 0

Bravo AF: 0.00278

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 09, 2020	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jun 14, 2017	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	14
DANN	Benign	0.93

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: rs779140644; hg19: chr22-51113458;