chr22-31893684-C-G

Variant names:

• chr22-31893684-C-G
• rs765244692
• NM_001242896.3:c.4136C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001242896.3(DEPDC5):​c.4136C>G​(p.Ser1379Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,734 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. S1379Y) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: DEPDC5 NM_001242896.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.84
• 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DEPDC5	NM_001242896.3	c.4136C>G	p.Ser1379Cys	missense_variant	Exon 39 of 43	ENST00000651528.2	NP_001229825.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DEPDC5	ENST00000651528.2	c.4136C>G	p.Ser1379Cys	missense_variant	Exon 39 of 43		NM_001242896.3	ENSP00000498382.1
ENSG00000285404	ENST00000646701.1	c.1787-62455C>G		intron_variant	Intron 20 of 20			ENSP00000496158.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000803 AC: 2 AN: 249112 AF XY: 0.00000740

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461734 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727164

African (AFR) AF: 0.00 AC: 0 AN: 33460

American (AMR) AF: 0.00 AC: 0 AN: 44694

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.0000504 AC: 2 AN: 39688

South Asian (SAS) AF: 0.00 AC: 0 AN: 86234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111956

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000217 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Mar 22, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Uncertain	0.064	T
BayesDel_noAF	Benign	-0.13
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.18	.;.;.;.;.;T;.;.;.;.;T;.;.;.;.
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.92	D;D;D;D;D;D;.;.;D;D;.;D;.;D;D
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.51	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.7	.;.;.;.;.;L;.;.;.;.;L;.;.;L;.
PhyloP100		5.8
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-2.4	N;.;.;.;.;.;N;.;.;.;N;.;.;N;.
REVEL	Benign	0.17
Sift	Uncertain	0.017	D;.;.;.;.;.;T;.;.;.;D;.;.;D;.
Sift4G	Benign	0.17	T;.;.;.;.;.;T;.;.;.;T;.;.;T;.
Polyphen		1.0	.;.;D;.;.;.;.;.;.;.;.;.;D;.;.
Vest4		0.59
MVP		0.29
MPC		2.4
ClinPred		0.91	D
GERP RS		5.0
Varity_R		0.36
Mutation Taster		=51/49	polymorphism

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: rs765244692; hg19: chr22-32289670;