chr8-31157429-C-T

Position:

• chr8-31157429-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_000553.6(WRN):​c.3881C>T​(p.Ala1294Val) variant causes a missense change. The variant allele was found at a frequency of 0.000151 in 1,614,098 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1294T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000079 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00016 (0 hom.)
• Consequence: WRN NM_000553.6 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 4.13

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 Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.077130586).
• BP6: Variant 8-31157429-C-T is Benign according to our data. Variant chr8-31157429-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 458471.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WRN	NM_000553.6	c.3881C>T	p.Ala1294Val	missense_variant	33/35	ENST00000298139.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WRN	ENST00000298139.7	c.3881C>T	p.Ala1294Val	missense_variant	33/35	1	NM_000553.6	P1
WRN	ENST00000521620.5	n.2514C>T		non_coding_transcript_exon_variant	21/23	1
WRN	ENST00000650667.1	c.*3495C>T		3_prime_UTR_variant, NMD_transcript_variant	32/34

Frequencies

GnomAD3 genomes AF: 0.0000855 AC: 13 AN: 152128 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00145

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000211 AC: 53 AN: 251260 Hom.: 0 AF XY: 0.000214 AC XY: 29 AN XY: 135782

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00147

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000528

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000159 AC: 232 AN: 1461852 Hom.: 0 Cov.: 31 AF XY: 0.000193 AC XY: 140 AN XY: 727230

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00115

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000112

Gnomad4 OTH exome AF: 0.000116

GnomAD4 genome AF: 0.0000788 AC: 12 AN: 152246 Hom.: 0 Cov.: 32 AF XY: 0.000107 AC XY: 8 AN XY: 74432

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00125

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000580 Hom.: 0

Bravo AF: 0.0000567

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.000181 AC: 22

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Werner syndrome Uncertain:1 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 25, 2023	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	24
DANN	Uncertain	0.97
DEOGEN2	Benign	0.28	T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.32
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.042	D
MetaRNN	Benign	0.077	T
MetaSVM	Benign	-0.88	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.53	T
PROVEAN	Uncertain	-3.0	D
REVEL	Benign	0.21
Sift	Benign	0.055	T
Sift4G	Uncertain	0.045	D
Polyphen		0.26	B
Vest4		0.64
MVP		0.63
MPC		0.18
ClinPred		0.12	T
GERP RS		3.8
Varity_R		0.16
gMVP		0.47

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: rs146861737; hg19: chr8-31014945; COSMIC: COSV53304055;