rs746372266

chr22-31838795-C-G

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.2465C>G(p.Pro822Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000109 in 1,461,868 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P822S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: DEPDC5 NM_001242896.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.68

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 where missense usually causes diseases, DEPDC5
• BP4: Computational evidence support a benign effect (MetaRNN=0.11722955).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DEPDC5	NM_001242896.3	c.2465C>G	p.Pro822Arg	missense_variant	27/43	ENST00000651528.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DEPDC5	ENST00000651528.2	c.2465C>G	p.Pro822Arg	missense_variant	27/43		NM_001242896.3	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000281 AC: 7 AN: 249506 Hom.: 0 AF XY: 0.0000369 AC XY: 5 AN XY: 135356

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000109 AC: 16 AN: 1461868 Hom.: 0 Cov.: 30 AF XY: 0.0000110 AC XY: 8 AN XY: 727236

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000812

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000719

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.0000248 AC: 3

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 04, 2024

The c.2465C>G (p.P822R) alteration is located in exon 27 (coding exon 26) of the DEPDC5 gene. This alteration results from a C to G substitution at nucleotide position 2465, causing the proline (P) at amino acid position 822 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Familial focal epilepsy with variable foci Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 17, 2023

This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 822 of the DEPDC5 protein (p.Pro822Arg). This variant is present in population databases (rs746372266, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with DEPDC5-related conditions. ClinVar contains an entry for this variant (Variation ID: 534802). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.47
Cadd	Benign	21
Dann	Uncertain	0.99
Eigen	Benign	-0.18
Eigen_PC	Benign	-0.12
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;D;.;.;D;D;.;D;.;D;D
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.12	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.7	N;.;.;.;D;.;N;.;.;.;N;.;.;N;.
REVEL	Benign	0.059
Sift	Benign	0.041	D;.;.;.;D;.;D;.;.;.;T;.;.;T;.
Sift4G	Benign	0.069	T;.;.;.;.;.;D;.;.;.;D;.;.;D;.
Polyphen		0.47	.;.;P;.;.;.;.;.;.;.;.;.;P;.;.
Vest4		0.50
MVP		0.093
MPC		0.47
ClinPred		0.15	T
GERP RS		5.7
Varity_R		0.17

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs746372266; hg19: chr22-32234781;