rs779773463

Positions:

chr5-83195935-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_003401.5(XRCC4):c.481C>T(p.Arg161Ter) variant causes a stop gained, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000112 in 1,605,474 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000083 ( 0 hom. )

Consequence

XRCC4
NM_003401.5 stop_gained, splice_region

Scores

Splicing: ADA: 0.9008

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 0.608

Variant links:

Genes affected

XRCC4 (HGNC:12831): (X-ray repair cross complementing 4) The protein encoded by this gene functions together with DNA ligase IV and the DNA-dependent protein kinase in the repair of DNA double-strand breaks. This protein plays a role in both non-homologous end joining and the completion of V(D)J recombination. Mutations in this gene can cause short stature, microcephaly, and endocrine dysfunction (SSMED). Alternate transcript variants such as NM_022406 are unlikely to be expressed in some individuals due to a polymorphism (rs1805377) in the last splice acceptor site. [provided by RefSeq, Oct 2019]

XRCC4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 5-83195935-C-T is Pathogenic according to our data. Variant chr5-83195935-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 208519.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-83195935-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
XRCC4	NM_003401.5 linkuse as main transcript	c.481C>T	p.Arg161Ter	stop_gained, splice_region_variant	4/8	ENST00000396027.9	NP_003392.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
XRCC4	ENST00000396027.9 linkuse as main transcript	c.481C>T	p.Arg161Ter	stop_gained, splice_region_variant	4/8	5	NM_003401.5	ENSP00000379344	A1	Q13426-2

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152020

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000589

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000811

AC:

AN:

246624

Hom.:

AF XY:

0.00

AC XY:

AN XY:

133634

show subpopulations

Gnomad AFR exome

AF:

0.000126

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:

0.00000826

AC:

AN:

1453454

Hom.:

Cov.:

AF XY:

0.00000830

AC XY:

AN XY:

723022

show subpopulations

Gnomad4 AFR exome

AF:

0.0000303

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000389

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000189

Gnomad4 NFE exome

AF:

0.00000722

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152020

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74260

show subpopulations

Gnomad4 AFR

AF:

0.0000483

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:

0.0000589

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000335

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 23, 2022

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 208519). This premature translational stop signal has been observed in individual(s) with microcephalic primordial dwarfism (PMID: 25728776). This variant is present in population databases (rs779773463, gnomAD 0.008%). This sequence change creates a premature translational stop signal (p.Arg161*) in the XRCC4 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in XRCC4 are known to be pathogenic (PMID: 25728776). -

Short stature, microcephaly, and endocrine dysfunction

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 05, 2015

- -

XRCC4-related disorder

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 18, 2023

The XRCC4 c.481C>T variant is predicted to result in premature protein termination (p.Arg161*). This variant, along with another pathogenic variant, has been reported in an individual with primordial dwarfism (Murray et al. 2015. PubMed ID: 25728776). This variant is reported in 0.0082% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/5-82491754-C-T). Nonsense variants in XRCC4 are expected to be pathogenic. This variant is interpreted as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.59

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Benign

0.48

MutationTaster

Benign

1.0

A;A;A;A

Vest4

0.93

GERP RS

4.7

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.90

dbscSNV1_RF

Benign

0.66

SpliceAI score (max)

0.040

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