8-31033837-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_000553.6(WRN):c.-213G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0926 in 152,336 control chromosomes in the GnomAD database, including 1,277 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.093 (1277 hom., cov: 32)
  • Exomes 𝑓: 0.014 (0 hom.)
• Consequence: WRN NM_000553.6 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.736

Genes affected

WRN (HGNC:12791): (WRN RecQ like helicase) This gene encodes a member of the RecQ subfamily of DNA helicase proteins. The encoded nuclear protein is important in the maintenance of genome stability and plays a role in DNA repair, replication, transcription and telomere maintenance. This protein contains a N-terminal 3' to 5' exonuclease domain, an ATP-dependent helicase domain and RQC (RecQ helicase conserved region) domain in its central region, and a C-terminal HRDC (helicase RNase D C-terminal) domain and nuclear localization signal. Defects in this gene are the cause of Werner syndrome, an autosomal recessive disorder characterized by accelerated aging and an elevated risk for certain cancers. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 8-31033837-G-A is Benign according to our data. Variant chr8-31033837-G-A is described in ClinVar as [Benign]. Clinvar id is 362789.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr8-31033837-G-A is described in Lovd as [Likely_benign].
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.238 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WRN	NM_000553.6	c.-213G>A		5_prime_UTR_variant	1/35	ENST00000298139.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WRN	ENST00000298139.7	c.-213G>A		5_prime_UTR_variant	1/35	1	NM_000553.6	P1
WRN	ENST00000650667.1	c.-213G>A		5_prime_UTR_variant, NMD_transcript_variant	1/34

Frequencies

GnomAD3 genomes AF: 0.0925 AC: 14069 AN: 152080 Hom.: 1276 Cov.: 32

Gnomad AFR AF: 0.242

Gnomad AMI AF: 0.0208

Gnomad AMR AF: 0.0508

Gnomad ASJ AF: 0.0222

Gnomad EAS AF: 0.000580

Gnomad SAS AF: 0.0249

Gnomad FIN AF: 0.0356

Gnomad MID AF: 0.0443

Gnomad NFE AF: 0.0370

Gnomad OTH AF: 0.0722

GnomAD4 exome AF: 0.0145 AC: 2 AN: 138 Hom.: 0 Cov.: 0 AF XY: 0.00980 AC XY: 1 AN XY: 102

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.500

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00833

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0926 AC: 14101 AN: 152198 Hom.: 1277 Cov.: 32 AF XY: 0.0880 AC XY: 6553 AN XY: 74426

Gnomad4 AFR AF: 0.242

Gnomad4 AMR AF: 0.0510

Gnomad4 ASJ AF: 0.0222

Gnomad4 EAS AF: 0.000581

Gnomad4 SAS AF: 0.0249

Gnomad4 FIN AF: 0.0356

Gnomad4 NFE AF: 0.0370

Gnomad4 OTH AF: 0.0719

Alfa AF: 0.0740 Hom.: 229

Bravo AF: 0.0987

Asia WGS AF: 0.0270 AC: 96 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Werner syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
Cadd	Benign	1.5
Dann	Benign	0.78
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.3

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

Other links and lift over

dbSNP: rs11574158; hg19: chr8-30891353;