7-152648656-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005431.2(XRCC2):c.829G>A(p.Val277Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,448,174 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. V277F) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

XRCC2
NM_005431.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.51

Publications

0 publications found

Variant links:

Genes affected

XRCC2 (HGNC:12829): (X-ray repair cross complementing 2) This gene encodes a member of the RecA/Rad51-related protein family that participates in homologous recombination to maintain chromosome stability and repair DNA damage. This gene is involved in the repair of DNA double-strand breaks by homologous recombination and it functionally complements Chinese hamster irs1, a repair-deficient mutant that exhibits hypersensitivity to a number of different DNA-damaging agents. [provided by RefSeq, Jul 2008]

XRCC2 Gene-Disease associations (from GenCC):

Fanconi anemia complementation group U
Inheritance: AR Classification: MODERATE, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
male infertility with azoospermia or oligozoospermia due to single gene mutation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Fanconi anemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
premature ovarian failure 17
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
spermatogenic failure 50
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
breast cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
hereditary breast carcinoma
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

XRCC2 links:

ENSG00000298894 (HGNC:):

ENSG00000298894 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10158405).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XRCC2	NM_005431.2 link	c.829G>A	p.Val277Ile	missense_variant	Exon 3 of 3	ENST00000359321.2	NP_005422.1	O43543A0A384MEK2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
XRCC2	ENST00000359321.2 link	c.829G>A	p.Val277Ile	missense_variant	Exon 3 of 3	1	NM_005431.2	ENSP00000352271.1	O43543
XRCC2	ENST00000495707.1 link	n.851G>A		non_coding_transcript_exon_variant	Exon 3 of 3	1
XRCC2	ENST00000698506.1 link	c.661G>A	p.Val221Ile	missense_variant	Exon 2 of 2			ENSP00000513758.1	A0A8V8TMB7
ENSG00000298894	ENST00000758786.1 link	n.254-12054C>T		intron_variant	Intron 2 of 2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000418

AC:

AN:

238984

AF XY:

0.00000772

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000552

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1448174

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

719782

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32926

American (AMR)

AF:

0.00

AC:

AN:

42924

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25192

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39640

South Asian (SAS)

AF:

0.00

AC:

AN:

83750

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51928

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5432

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1106558

Other (OTH)

AF:

0.0000167

AC:

AN:

59824

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:1

Jun 21, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.V277I variant (also known as c.829G>A), located in coding exon 3 of the XRCC2 gene, results from a G to A substitution at nucleotide position 829. The valine at codon 277 is replaced by isoleucine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.068

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.44

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.65

M_CAP

Benign

0.012

MetaRNN

Benign

0.10

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.2

PhyloP100

1.5

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.29

REVEL

Benign

0.059

Sift

Benign

0.15

Sift4G

Benign

0.20

Polyphen

0.17

Vest4

0.099

MutPred

0.53

Gain of disorder (P = 0.2003);

MVP

0.31

MPC

0.035

ClinPred

0.087

GERP RS

3.5

Varity_R

0.018

gMVP

0.15

Mutation Taster

=89/11

polymorphism

(source)

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

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7-152648656-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over