rs869312859

Variant names:

• chr17-7204200-T-TA
• rs869312859
• NM_001365.5:c.277dupT

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001321075.3(DLG4):​c.148dupT​(p.Tyr50LeufsTer2) variant causes a frameshift, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DLG4 NM_001321075.3 frameshift, splice_region
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 8.17
• Publications: 2 publications found

Genes affected

DLG4 (HGNC:2903): (discs large MAGUK scaffold protein 4) This gene encodes a member of the membrane-associated guanylate kinase (MAGUK) family. It heteromultimerizes with another MAGUK protein, DLG2, and is recruited into NMDA receptor and potassium channel clusters. These two MAGUK proteins may interact at postsynaptic sites to form a multimeric scaffold for the clustering of receptors, ion channels, and associated signaling proteins. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

DLG4 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• intellectual developmental disorder 62

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

ACMG classification

Our verdict: Pathogenic. The variant received 18 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 17-7204200-T-TA is Pathogenic according to our data. Variant chr17-7204200-T-TA is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 224807.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001321075.3. 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
	DLG4	NM_001365.5	MANE Plus Clinical	c.277dupT	p.Tyr93LeufsTer2	frameshift splice_region	Exon 5 of 22	NP_001356.1	P78352-2
	DLG4	NM_001321075.3	MANE Select	c.148dupT	p.Tyr50LeufsTer2	frameshift splice_region	Exon 3 of 20	NP_001308004.1	P78352-1
	DLG4	NM_001321074.1		c.277dupT	p.Tyr93LeufsTer20	frameshift splice_region	Exon 5 of 22	NP_001308003.1	B9EGL1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DLG4	ENST00000648172.9	MANE Plus Clinical	c.277dupT	p.Tyr93LeufsTer2	frameshift splice_region	Exon 5 of 22	ENSP00000497806.3	P78352-2
	DLG4	ENST00000399506.9	TSL:2 MANE Select	c.148dupT	p.Tyr50LeufsTer2	frameshift splice_region	Exon 3 of 20	ENSP00000382425.2	P78352-1
	DLG4	ENST00000399510.8	TSL:1	c.277dupT	p.Tyr93LeufsTer20	frameshift splice_region	Exon 5 of 22	ENSP00000382428.3	B9EGL1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Intellectual developmental disorder 62 (3)
1	-	-	Cerebral visual impairment and intellectual disability (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.2
Mutation Taster		=9/191	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs869312859; hg19: chr17-7107519;