dbSNP rs913325260: WRN:p.Arg877Arg (chr8-31124522-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_000553.6(WRN):c.2631G>A(p.Arg877Arg) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000823 in 1,458,554 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

WRN
NM_000553.6 splice_region, synonymous

Scores

Splicing: ADA: 0.08490

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.766

Publications

0 publications found

Variant links:

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]

WRN Gene-Disease associations (from GenCC):

Werner syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, G2P, Ambry Genetics
osteosarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp

WRN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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=-0.57).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WRN	NM_000553.6 link	c.2631G>A	p.Arg877Arg	splice_region_variant, synonymous_variant	Exon 22 of 35	ENST00000298139.7	NP_000544.2	Q14191

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WRN	ENST00000298139.7 link	c.2631G>A	p.Arg877Arg	splice_region_variant, synonymous_variant	Exon 22 of 35	1	NM_000553.6	ENSP00000298139.5		Q14191

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000823

AC:

AN:

1458554

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

725776

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33398

American (AMR)

AF:

0.00

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26076

East Asian (EAS)

AF:

0.00

AC:

AN:

39526

South Asian (SAS)

AF:

0.00

AC:

AN:

86118

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53374

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1109414

Other (OTH)

AF:

0.00

AC:

AN:

60226

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

6.8

(source)

DANN

Benign

0.47

PhyloP100

0.77

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Mutation Taster

=66/34

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.085

dbscSNV1_RF

Benign

0.28

SpliceAI score (max)

0.34

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.34

Position offset: 0

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over