22-31778120-G-A

Variant names:

• chr22-31778120-G-A
• rs886039247
• NM_001242896.3:c.435G>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001242896.3(DEPDC5):​c.435G>A​(p.Trp145*) variant causes a stop gained 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 not provided (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DEPDC5 NM_001242896.3 stop_gained
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 8.26
• Publications: 2 publications found

Genes affected

DEPDC5 (HGNC:18423): (DEP domain containing 5, GATOR1 subcomplex subunit) This gene encodes a member of the IML1 family of proteins involved in G-protein signaling pathways. The mechanistic target of rapamycin complex 1 (mTORC1) pathway regulates cell growth by sensing the availability of nutrients. The protein encoded by this gene is a component of the GATOR1 (GAP activity toward Rags) complex which inhibits the amino acid-sensing branch of the mTORC1 pathway. Mutations in this gene are associated with autosomal dominant familial focal epilepsy with variable foci. A single nucleotide polymorphism in an intron of this gene has been associated with an increased risk of hepatocellular carcinoma in individuals with chronic hepatitis C virus infection. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2014]

DEPDC5 Gene-Disease associations (from GenCC):

• epilepsy, familial focal, with variable foci 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Ambry Genetics, Illumina, G2P
• focal epilepsy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• autosomal dominant epilepsy with auditory features

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal dominant nocturnal frontal lobe epilepsy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial focal epilepsy with variable foci

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Brugada syndrome

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000285404 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001242896.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DEPDC5	NM_001242896.3	MANE Select	c.435G>A	p.Trp145*	stop_gained	Exon 8 of 43	NP_001229825.1
	DEPDC5	NM_001364318.2		c.435G>A	p.Trp145*	stop_gained	Exon 8 of 43	NP_001351247.1
	DEPDC5	NM_001136029.4		c.435G>A	p.Trp145*	stop_gained	Exon 8 of 43	NP_001129501.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DEPDC5	ENST00000651528.2	MANE Select	c.435G>A	p.Trp145*	stop_gained	Exon 8 of 43	ENSP00000498382.1
	DEPDC5	ENST00000382112.8	TSL:1	c.435G>A	p.Trp145*	stop_gained	Exon 8 of 43	ENSP00000371546.4
	DEPDC5	ENST00000433147.2	TSL:1	c.351G>A	p.Trp117*	stop_gained	Exon 7 of 42	ENSP00000410544.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Epilepsy, familial focal, with variable foci 1 Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	37
DANN	Uncertain	0.99
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.78
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		8.3
Vest4		0.88
ClinPred		1.0	D
GERP RS		4.8
Mutation Taster		=0/200	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: rs886039247; hg19: chr22-32174106;