4-6302375-C-G

Position:

• chr4-6302375-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM1 PM2 PM5 BP4_Moderate

The NM_006005.3(WFS1):​c.2580C>G​(p.His860Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,460,750 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 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. H860D) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 35)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: WFS1 NM_006005.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.0420

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a topological_domain Lumenal (size 216) in uniprot entity WFS1_HUMAN there are 92 pathogenic changes around while only 24 benign (79%) 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 chr4-6302373-C-G is described in Lovd as [Pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.16979572).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WFS1	NM_006005.3	c.2580C>G	p.His860Gln	missense_variant	8/8	ENST00000226760.5	NP_005996.2
WFS1	NM_001145853.1	c.2580C>G	p.His860Gln	missense_variant	8/8		NP_001139325.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WFS1	ENST00000226760.5	c.2580C>G	p.His860Gln	missense_variant	8/8	1	NM_006005.3	ENSP00000226760.1

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1460750 Hom.: 0 Cov.: 87 AF XY: 0.00000413 AC XY: 3 AN XY: 726720

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 35

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 22, 2024	Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2016	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Uncertain	0.087	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	0.27
DANN	Benign	0.74
DEOGEN2	Benign	0.095	T;T
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.92
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.75	.;T
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.17	T;T
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	1.2	L;L
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.31	N;N
REVEL	Uncertain	0.56
Sift	Benign	0.68	T;T
Sift4G	Benign	0.63	T;T
Polyphen		0.50	P;P
Vest4		0.28
MutPred		0.41		Loss of ubiquitination at K862 (P = 0.0949);Loss of ubiquitination at K862 (P = 0.0949);
MVP		0.78
ClinPred		0.15	T
GERP RS		-0.026
Varity_R		0.043
gMVP		0.67

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

Publications

LitVar

Other links and lift over

dbSNP: rs754802246; hg19: chr4-6304102;