chr8-31085181-G-A

Variant names:

• chr8-31085181-G-A
• rs756908250
• NM_000553.6:c.1366G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000553.6(WRN):​c.1366G>A​(p.Asp456Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D456A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: WRN NM_000553.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.408
• Publications: 1 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.075992286).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000553.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	WRN	NM_000553.6	MANE Select	c.1366G>A	p.Asp456Asn	missense	Exon 11 of 35	NP_000544.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	WRN	ENST00000298139.7	TSL:1 MANE Select	c.1366G>A	p.Asp456Asn	missense	Exon 11 of 35	ENSP00000298139.5
	WRN	ENST00000651642.1		c.580G>A	p.Asp194Asn	missense	Exon 4 of 4	ENSP00000498779.1
	WRN	ENST00000650667.1		n.*980G>A		non_coding_transcript_exon	Exon 10 of 34	ENSP00000498593.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Werner syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	11
DANN	Benign	0.21
DEOGEN2	Benign	0.14	T
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.011	N
LIST_S2	Benign	0.50	T
M_CAP	Benign	0.0038	T
MetaRNN	Benign	0.076	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.34	N
PhyloP100		0.41
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.53	N
REVEL	Benign	0.041
Sift	Benign	0.76	T
Sift4G	Benign	0.26	T
Polyphen		0.49	P
Vest4		0.24
MutPred		0.20		Loss of phosphorylation at S453 (P = 0.1416)
MVP		0.27
MPC		0.064
ClinPred		0.052	T
GERP RS		-1.0
Varity_R		0.018
gMVP		0.22
Mutation Taster		=96/4	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs756908250; hg19: chr8-30942697;