rs765756226

Variant names:

• chr8-31096789-C-A
• NM_000553.6:c.1920C>A

Your query was ambiguous. Multiple possible variants found:

• chr8-31096789-C-A
• chr8-31096789-C-G
• chr8-31096789-C-T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_000553.6(WRN):​c.1920C>A​(p.Tyr640*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,436 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: WRN NM_000553.6 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.40

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 Pathogenic. Variant got 10 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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WRN	NM_000553.6	c.1920C>A	p.Tyr640*	stop_gained	Exon 17 of 35	ENST00000298139.7	NP_000544.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WRN	ENST00000298139.7	c.1920C>A	p.Tyr640*	stop_gained	Exon 17 of 35	1	NM_000553.6	ENSP00000298139.5
WRN	ENST00000521620.5	n.553C>A		non_coding_transcript_exon_variant	Exon 5 of 23	1
WRN	ENST00000650667.1	n.*1534C>A		non_coding_transcript_exon_variant	Exon 16 of 34			ENSP00000498593.1
WRN	ENST00000650667.1	n.*1534C>A		3_prime_UTR_variant	Exon 16 of 34			ENSP00000498593.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.87e-7 AC: 1 AN: 1455436 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 724148

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Uncertain	25
DANN	Benign	0.95
Eigen	Benign	-0.84
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.088	N
Vest4		0.97
GERP RS		-5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-30954305;