22-31838822-G-GAGA

Variant names:

• chr22-31838822-G-GAGA
• rs1555897392
• NM_001242896.3:c.2492_2493insAGA

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM4_Supporting PP5

The NM_001242896.3(DEPDC5):​c.2492_2493insAGA​(p.Ser831delinsArgAsp) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DEPDC5 NM_001242896.3 disruptive_inframe_insertion
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.92
• Publications: 0 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: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_001242896.3. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 22-31838822-G-GAGA is Pathogenic according to our data. Variant chr22-31838822-G-GAGA is described in ClinVar as Pathogenic. ClinVar VariationId is 433143.Status of the report is no_assertion_criteria_provided, 0 stars.

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.2492_2493insAGA	p.Ser831delinsArgAsp	disruptive_inframe_insertion	Exon 27 of 43	NP_001229825.1
	DEPDC5	NM_001364318.2		c.2492_2493insAGA	p.Ser831delinsArgAsp	disruptive_inframe_insertion	Exon 27 of 43	NP_001351247.1
	DEPDC5	NM_001136029.4		c.2465_2466insAGA	p.Ser822delinsArgAsp	disruptive_inframe_insertion	Exon 27 of 43	NP_001129501.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DEPDC5	ENST00000651528.2	MANE Select	c.2492_2493insAGA	p.Ser831delinsArgAsp	disruptive_inframe_insertion	Exon 27 of 43	ENSP00000498382.1
	DEPDC5	ENST00000382112.8	TSL:1	c.2492_2493insAGA	p.Ser831delinsArgAsp	disruptive_inframe_insertion	Exon 27 of 43	ENSP00000371546.4
	DEPDC5	ENST00000433147.2	TSL:1	c.2408_2409insAGA	p.Ser803delinsArgAsp	disruptive_inframe_insertion	Exon 26 of 42	ENSP00000410544.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Self-limited epilepsy with centrotemporal spikes (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.9
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1555897392; hg19: chr22-32234808;