Variant chrX-55006713-G-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_014481.4(APEX2):c.835G>T(p.Val279Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000441 in 1,179,582 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 10 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., 5 hem., cov: 22)

Exomes 𝑓: 0.000017 ( 0 hom. 5 hem. )

Consequence

APEX2
NM_014481.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.06

Variant links:

Genes affected

APEX2 (HGNC:17889): (apurinic/apyrimidinic endodeoxyribonuclease 2) Apurinic/apyrimidinic (AP) sites occur frequently in DNA molecules by spontaneous hydrolysis, by DNA damaging agents or by DNA glycosylases that remove specific abnormal bases. AP sites are pre-mutagenic lesions that can prevent normal DNA replication so the cell contains systems to identify and repair such sites. Class II AP endonucleases cleave the phosphodiester backbone 5' to the AP site. This gene encodes a protein shown to have a weak class II AP endonuclease activity. Most of the encoded protein is located in the nucleus but some is also present in mitochondria. This protein may play an important role in both nuclear and mitochondrial base excision repair. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Nov 2012]

APEX2 links:

APEX2 (HGNC:):

APEX2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12031865).

BS2

High Hemizygotes in GnomAd4 at 5 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
APEX2	NM_014481.4 linkuse as main transcript	c.835G>T	p.Val279Leu	missense_variant	6/6	ENST00000374987.4	NP_055296.2	Q9UBZ4E5KN95
APEX2	NM_001271748.2 linkuse as main transcript	c.322G>T	p.Val108Leu	missense_variant	5/5		NP_001258677.1	B7ZA71B4DWI9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
APEX2	ENST00000374987.4 linkuse as main transcript	c.835G>T	p.Val279Leu	missense_variant	6/6	1	NM_014481.4	ENSP00000364126.3		Q9UBZ4
APEX2	ENST00000471758.1 linkuse as main transcript	n.684G>T		non_coding_transcript_exon_variant	5/5	2

Frequencies

GnomAD3 genomes

AF:

0.000303

AC:

AN:

112199

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

AN XY:

34357

show subpopulations

Gnomad AFR

AF:

0.00110

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000101

AC:

AN:

149107

Hom.:

AF XY:

0.0000490

AC XY:

AN XY:

40781

show subpopulations

Gnomad AFR exome

AF:

0.00124

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000169

AC:

AN:

1067383

Hom.:

Cov.:

AF XY:

0.0000146

AC XY:

AN XY:

341813

show subpopulations

Gnomad4 AFR exome

AF:

0.000659

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:

0.00

Gnomad4 OTH exome

AF:

0.0000224

GnomAD4 genome

AF:

0.000303

AC:

AN:

112199

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

AN XY:

34357

show subpopulations

Gnomad4 AFR

AF:

0.00110

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000213

Hom.:

Bravo

AF:

0.000344

ESP6500AA

AF:

0.00130

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000991

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

Jan 19, 2024

The c.835G>T (p.V279L) alteration is located in exon 6 (coding exon 6) of the APEX2 gene. This alteration results from a G to T substitution at nucleotide position 835, causing the valine (V) at amino acid position 279 to be replaced by a leucine (L). 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

0.29

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.15

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.31

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.81

M_CAP

Pathogenic

0.67

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.53

MutationAssessor

Benign

0.87

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-1.3

REVEL

Uncertain

0.40

Sift

Uncertain

0.016

Sift4G

Uncertain

0.018

Polyphen

0.011

Vest4

0.35

MutPred

0.57

Gain of sheet (P = 0.0344);

MVP

0.98

MPC

0.20

ClinPred

0.10

GERP RS

3.6

Varity_R

0.32

gMVP

0.65

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

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