4-6301060-C-T

Position:

chr4-6301060-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2

The ENST00000226760.5(WFS1):c.1265C>T(p.Ala422Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00042 in 1,614,062 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A422T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00044 ( 0 hom. )

Consequence

WFS1
ENST00000226760.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:11B:1

Conservation

PhyloP100: 7.40

Variant links:

Genes affected

WFS1 (HGNC:12762): (wolframin ER transmembrane glycoprotein) This gene encodes a transmembrane protein, which is located primarily in the endoplasmic reticulum and ubiquitously expressed with highest levels in brain, pancreas, heart, and insulinoma beta-cell lines. Mutations in this gene are associated with Wolfram syndrome, also called DIDMOAD (Diabetes Insipidus, Diabetes Mellitus, Optic Atrophy, and Deafness), an autosomal recessive disorder. The disease affects the brain and central nervous system. Mutations in this gene can also cause autosomal dominant deafness 6 (DFNA6), also known as DFNA14 or DFNA38. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2009]

WFS1 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 6 uncertain in ENST00000226760.5

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WFS1	NM_006005.3 linkuse as main transcript	c.1265C>T	p.Ala422Val	missense_variant	8/8	ENST00000226760.5	NP_005996.2
WFS1	NM_001145853.1 linkuse as main transcript	c.1265C>T	p.Ala422Val	missense_variant	8/8		NP_001139325.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WFS1	ENST00000226760.5 linkuse as main transcript	c.1265C>T	p.Ala422Val	missense_variant	8/8	1	NM_006005.3	ENSP00000226760	P2
	ENST00000661896.1 linkuse as main transcript	n.1337+2855G>A		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000269

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00329

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000514

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000167

AC:

AN:

251416

Hom.:

AF XY:

0.000162

AC XY:

AN XY:

135882

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000343

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000436

AC:

637

AN:

1461868

Hom.:

Cov.:

104

AF XY:

0.000430

AC XY:

313

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000560

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000269

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.000256

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000514

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000526

Hom.:

Bravo

AF:

0.000306

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:11Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Aug 10, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 04, 2023	Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant does not alter protein structure/function -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Apr 07, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Apr 19, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 11, 2023	- -

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Nov 13, 2018	The p.Ala422Val variant in WFS1 has not been previously reported in individuals with hearing loss or Wolfram syndrome, but has been identified in 0.035% (45/129 150) of European chromosomes by gnomAD (http://gnomad.broadinstitute.org). This variant has also been reported in ClinVar (Variation ID 393388). Computational p rediction tools and conservation analysis do not provide strong support for or a gainst an impact to the protein. In summary, the clinical significance of the p. Ala422Val variant is uncertain. ACMG/AMP Criteria applied: None. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Dec 20, 2021	DNA sequence analysis of the WFS1 gene demonstrated a sequence change, c.1265C>T, in exon 8 that results in an amino acid change, p.Ala422Val. This sequence change has been described in the gnomAD database with a frequency of 0.03% in the non-Finnish European subpopulation (dbSNP rs150368988). The p.Ala422Val change affects a moderately conserved amino acid residue located in a domain of the WFS1 protein that is not known to be functional. In-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL) provide contradictory results for the p.Ala422Val substitution. This sequence change does not appear to have been previously described in individuals with WFS1-related disorders. Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Ala422Val change remains unknown at this time. -

WFS1-Related Spectrum Disorders

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

WFS1-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 18, 2024

The WFS1 c.1265C>T variant is predicted to result in the amino acid substitution p.Ala422Val. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.035% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Monogenic diabetes

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Mar 04, 2016

ACMG Criteria: PP3, BP4 -

Wolfram syndrome 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic

Potent mutations in WFS1 gene are associated with Wolfram's syndrome, an autosomal recessive condition, which cause diabetes mellitus, diabetes insipidus, deafness and optic atrophy.However no sufficient evidence is found to ascertain the role of this particular variant rs150368988 in Wolfram's syndrome yet. -

Autosomal dominant nonsyndromic hearing loss 6

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Uncertain

0.013

BayesDel_noAF

Uncertain

0.090

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.12

T;T

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.23

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.94

.;D

M_CAP

Pathogenic

0.41

MetaRNN

Uncertain

0.46

T;T

MetaSVM

Uncertain

0.010

MutationAssessor

Uncertain

2.8

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.060

N;N

REVEL

Uncertain

0.57

Sift

Benign

0.82

T;T

Sift4G

Uncertain

0.029

D;D

Polyphen

0.44

B;B

Vest4

0.69

MVP

0.91

ClinPred

0.13

GERP RS

3.9

Varity_R

0.049

gMVP

0.73

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over