7-152648459-G-T

Variant names:

• chr7-152648459-G-T
• rs3218541
• ENST00000495707.1:n.1048C>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005431.2(XRCC2):​c.*183C>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000299 in 334,768 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000030 (0 hom.)
• Consequence: XRCC2 NM_005431.2 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.605
• Publications: 0 publications found

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

ENSG00000298894 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XRCC2	NM_005431.2	c.*183C>A		3_prime_UTR_variant	Exon 3 of 3	ENST00000359321.2	NP_005422.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XRCC2	ENST00000495707.1	n.1048C>A		non_coding_transcript_exon_variant	Exon 3 of 3	1
XRCC2	ENST00000359321.2	c.*183C>A		3_prime_UTR_variant	Exon 3 of 3	1	NM_005431.2	ENSP00000352271.1
XRCC2	ENST00000698506.1	c.*183C>A		3_prime_UTR_variant	Exon 2 of 2			ENSP00000513758.1
ENSG00000298894	ENST00000758786.1	n.254-12251G>T		intron_variant	Intron 2 of 2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000299 AC: 1 AN: 334768 Hom.: 0 Cov.: 6 AF XY: 0.00000588 AC XY: 1 AN XY: 170118

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.000116 AC: 1 AN: 8626

American (AMR) AF: 0.00 AC: 0 AN: 9958

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 9990

East Asian (EAS) AF: 0.00 AC: 0 AN: 23580

South Asian (SAS) AF: 0.00 AC: 0 AN: 11522

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 20724

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1450

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 229666

Other (OTH) AF: 0.00 AC: 0 AN: 19252

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.33
DANN	Benign	0.33
PhyloP100		-0.60
Mutation Taster		=100/0	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: rs3218541; hg19: chr7-152345544;