4-6301306-C-G

Position:

• chr4-6301306-C-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_006005.3(WFS1):​c.1511C>G​(p.Pro504Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000548 in 1,459,028 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. P504L) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: WFS1 NM_006005.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:2 U:1
• Conservation: PhyloP100: 5.28

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]

ENSG00000286176 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a transmembrane_region Helical (size 20) in uniprot entity WFS1_HUMAN there are 7 pathogenic changes around while only 2 benign (78%) in NM_006005.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr4-6301306-C-T is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.961

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WFS1	NM_006005.3	c.1511C>G	p.Pro504Arg	missense_variant	8/8	ENST00000226760.5	NP_005996.2
WFS1	NM_001145853.1	c.1511C>G	p.Pro504Arg	missense_variant	8/8		NP_001139325.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WFS1	ENST00000226760.5	c.1511C>G	p.Pro504Arg	missense_variant	8/8	1	NM_006005.3	ENSP00000226760.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000548 AC: 8 AN: 1459028 Hom.: 0 Cov.: 100 AF XY: 0.00000551 AC XY: 4 AN XY: 725938

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000719

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:2 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:2 Uncertain:1

Likely pathogenic, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 08, 2022	In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 504 of the WFS1 protein (p.Pro504Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with WFS1-related conditions (PMID: 24890733, 27395765, 33841295). ClinVar contains an entry for this variant (Variation ID: 1328269). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant disrupts the p.Pro504 amino acid residue in WFS1. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 9771706, 15277431, 16806192, 24890733). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Benign	22
DANN	Benign	0.85
DEOGEN2	Benign	0.12	T;T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.90	.;D
M_CAP	Pathogenic	0.61	D
MetaRNN	Pathogenic	0.96	D;D
MetaSVM	Uncertain	0.53	D
MutationAssessor	Uncertain	2.8	M;M
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.1	N;N
REVEL	Pathogenic	0.89
Sift	Benign	0.64	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.98	D;D
Vest4		0.94
MVP		1.0
ClinPred		0.85	D
GERP RS		4.4
Varity_R		0.23
gMVP		0.82

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: chr4-6303033;