rs776885208

Positions:

• chr22-31837151-G-A
• chr22-31837151-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001242896.3(DEPDC5):​c.2350G>A​(p.Asp784Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: DEPDC5 NM_001242896.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.88

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DEPDC5. . Gene score misZ 2.6501 (greater than the threshold 3.09). Trascript score misZ 3.7275 (greater than threshold 3.09). GenCC has associacion of gene with focal epilepsy, Brugada syndrome, epilepsy, familial focal, with variable foci 1, familial focal epilepsy with variable foci, autosomal dominant epilepsy with auditory features, autosomal dominant nocturnal frontal lobe epilepsy.
• BP4: Computational evidence support a benign effect (MetaRNN=0.2289573).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DEPDC5	NM_001242896.3	c.2350G>A	p.Asp784Asn	missense_variant	26/43	ENST00000651528.2	NP_001229825.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DEPDC5	ENST00000651528.2	c.2350G>A	p.Asp784Asn	missense_variant	26/43		NM_001242896.3	ENSP00000498382	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000241 AC: 6 AN: 249074 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135092

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000167

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.0000465

Gnomad NFE exome AF: 0.00000886

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461812 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727210

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000827 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial focal epilepsy with variable foci Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 06, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 238675). This variant has not been reported in the literature in individuals affected with DEPDC5-related conditions. This variant is present in population databases (rs776885208, gnomAD 0.02%). This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 784 of the DEPDC5 protein (p.Asp784Asn). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.48
CADD	Pathogenic	31
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.010	.;.;.;.;.;.;.;T;.;.;.;.;T;.;.;.;.;.
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D;D;D;D;.;.;D;D;.;D;D;.;D;D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.21	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.93	T
MutationAssessor	Uncertain	2.1	.;.;.;.;M;.;.;M;.;.;.;.;M;.;.;M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;N
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	0.30	N;.;.;.;.;.;.;.;N;.;.;.;N;.;.;.;N;.
REVEL	Benign	0.21
Sift	Benign	0.19	T;.;.;.;.;.;.;.;T;.;.;.;T;.;.;.;T;.
Sift4G	Benign	0.24	T;.;.;.;.;.;.;.;T;.;.;.;T;.;.;.;T;.
Polyphen		0.99	.;.;.;.;D;.;.;.;.;.;.;.;.;.;.;D;.;.
Vest4		0.58
MVP		0.26
MPC		1.1
ClinPred		0.48	T
GERP RS		4.5
Varity_R		0.17

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

Publications

LitVar

Other links and lift over

dbSNP: rs776885208; hg19: chr22-32233137;