Variant 17-2042745-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_080822.3(OVCA2):c.325C>G(p.Leu109Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000212 in 1,601,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

OVCA2
NM_080822.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.22

Variant links:

Genes affected

OVCA2 (HGNC:24203): (OVCA2 serine hydrolase domain containing) Involved in response to retinoic acid. Located in cytoplasm. Biomarker of ovarian cancer. [provided by Alliance of Genome Resources, Apr 2022]

OVCA2 links:

DPH1 (HGNC:3003): (diphthamide biosynthesis 1) The protein encoded by this gene is an enzyme involved in the biosynthesis of diphthamide, a modified histidine found only in elongation factor-2 (EEF2). Diphthamide residues in EEF2 are targeted for ADP-ribosylation by diphtheria toxin and Pseudomonas exotoxin A. Defects in this gene have been associated with both ovarian cancer and autosomal recessive intellectual disability with short stature, craniofacial, and ectodermal anomalies. [provided by RefSeq, Oct 2016]

DPH1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OVCA2	NM_080822.3 linkuse as main transcript	c.325C>G	p.Leu109Val	missense_variant	2/2	ENST00000572195.3	NP_543012.1
DPH1	NM_001383.6 linkuse as main transcript	c.*159C>G		3_prime_UTR_variant	13/13	ENST00000263083.12	NP_001374.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OVCA2	ENST00000572195.3 linkuse as main transcript	c.325C>G	p.Leu109Val	missense_variant	2/2	1	NM_080822.3	ENSP00000461388	P1
DPH1	ENST00000263083.12 linkuse as main transcript	c.*159C>G		3_prime_UTR_variant	13/13	1	NM_001383.6	ENSP00000263083	P1	Q9BZG8-4

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000168

AC:

AN:

238434

Hom.:

AF XY:

0.0000232

AC XY:

AN XY:

129360

show subpopulations

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000375

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000221

AC:

AN:

1449594

Hom.:

Cov.:

AF XY:

0.0000264

AC XY:

AN XY:

720734

show subpopulations

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000253

Gnomad4 OTH exome

AF:

0.0000669

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74384

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 06, 2023

The c.325C>G (p.L109V) alteration is located in exon 2 (coding exon 2) of the OVCA2 gene. This alteration results from a C to G substitution at nucleotide position 325, causing the leucine (L) at amino acid position 109 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Benign

0.78

DEOGEN2

Benign

0.039

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.97

FATHMM_MKL

Benign

0.27

LIST_S2

Benign

0.70

M_CAP

Benign

0.0061

MetaRNN

Benign

0.14

MetaSVM

Benign

-0.95

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.37

Sift4G

Benign

0.53

Polyphen

0.17

Vest4

0.14

MutPred

0.40

Loss of stability (P = 0.0856);

MVP

0.30

MPC

0.067

ClinPred

0.044

GERP RS

-0.41

Varity_R

0.049

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.28

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.28

Position offset: -1

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over