NM_021120.4:c.1092dupC

Variant names:

• chrX-70451967-T-TC
• rs398122846
• NM_021120.4:c.1092dupC

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_021120.4(DLG3):​c.1092dupC​(p.Thr365HisfsTer13) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 22)
• Consequence: DLG3 NM_021120.4 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 6.37
• Publications: 1 publications found

Genes affected

DLG3 (HGNC:2902): (discs large MAGUK scaffold protein 3) This gene encodes a member of the membrane-associated guanylate kinase protein family. The encoded protein may play a role in clustering of NMDA receptors at excitatory synapses. It may also negatively regulate cell proliferation through interaction with the C-terminal region of the adenomatosis polyposis coli tumor suppressor protein. Mutations in this gene have been associated with X-linked cognitive disability. Alternatively spliced transcript variants have been described. [provided by RefSeq, Oct 2009]

DLG3 Gene-Disease associations (from GenCC):

• intellectual disability, X-linked 90

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-70451967-T-TC is Pathogenic according to our data. Variant chrX-70451967-T-TC is described in ClinVar as Pathogenic. ClinVar VariationId is 29942.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021120.4. 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
	DLG3	NM_021120.4	MANE Select	c.1092dupC	p.Thr365HisfsTer13	frameshift	Exon 7 of 19	NP_066943.2	Q92796-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DLG3	ENST00000374360.8	TSL:1 MANE Select	c.1092dupC	p.Thr365HisfsTer13	frameshift	Exon 7 of 19	ENSP00000363480.3	Q92796-1
	DLG3	ENST00000194900.8	TSL:5	c.1146dupC	p.Thr383HisfsTer13	frameshift	Exon 8 of 21	ENSP00000194900.4	Q5JUW8
	DLG3	ENST00000949779.1		c.1092dupC	p.Thr365HisfsTer13	frameshift	Exon 7 of 20	ENSP00000619838.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Intellectual disability, X-linked 90 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		6.4
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs398122846; hg19: chrX-69671817;