11-70472966-GGTAA-G

Variant names:

• chr11-70472966-GGTAA-G
• rs2135661818
• NM_012309.5:c.5449_5452delTTAC

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_012309.5(SHANK2):​c.5449_5452delTTAC​(p.Leu1817GlnfsTer13) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SHANK2 NM_012309.5 frameshift
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.68
• Publications: 0 publications found

Genes affected

SHANK2 (HGNC:14295): (SH3 and multiple ankyrin repeat domains 2) This gene encodes a protein that is a member of the Shank family of synaptic proteins that may function as molecular scaffolds in the postsynaptic density of excitatory synapses. Shank proteins contain multiple domains for protein-protein interaction, including ankyrin repeats, and an SH3 domain. This particular family member contains a PDZ domain, a consensus sequence for cortactin SH3 domain-binding peptides and a sterile alpha motif. The alternative splicing demonstrated in Shank genes has been suggested as a mechanism for regulating the molecular structure of Shank and the spectrum of Shank-interacting proteins in the postsynaptic densities of the adult and developing brain. Alterations in the encoded protein may be associated with susceptibility to autism spectrum disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2014]

SHANK2 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• autism, susceptibility to, 17

  Inheritance: AD Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0182 CDS is truncated, and there are 0 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012309.5. 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
	SHANK2	NM_012309.5	MANE Select	c.5449_5452delTTAC	p.Leu1817GlnfsTer13	frameshift	Exon 26 of 26	NP_036441.2	Q9UPX8-3
	SHANK2	NM_001441024.1		c.5569_5572delTTAC	p.Leu1857GlnfsTer13	frameshift	Exon 24 of 24	NP_001427953.1
	SHANK2	NM_001441025.1		c.5398_5401delTTAC	p.Leu1800GlnfsTer13	frameshift	Exon 23 of 23	NP_001427954.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SHANK2	ENST00000601538.6	TSL:5 MANE Select	c.5449_5452delTTAC	p.Leu1817GlnfsTer13	frameshift	Exon 26 of 26	ENSP00000469689.2	Q9UPX8-3
	SHANK2	ENST00000409161.5	TSL:1	c.3661_3664delTTAC	p.Leu1221GlnfsTer13	frameshift	Exon 10 of 10	ENSP00000386491.1	E7EUA2
	SHANK2	ENST00000916035.1		c.5398_5401delTTAC	p.Leu1800GlnfsTer13	frameshift	Exon 23 of 23	ENSP00000586094.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.7

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

Other links and lift over

dbSNP: rs2135661818; hg19: chr11-70319071;