4-6301875-G-C

Variant names:

• chr4-6301875-G-C
• rs727503751
• NM_006005.3:c.2080G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM1 PM2

The NM_006005.3(WFS1):​c.2080G>C​(p.Glu694Gln) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. E694D) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 34)
• Consequence: WFS1 NM_006005.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.27
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• Wolfram-like syndrome

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Ambry Genetics, ClinGen, Orphanet
• Wolfram syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• autosomal dominant nonsyndromic hearing loss 6

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• cataract 41

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Wolfram syndrome 1

  Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• early-onset nuclear cataract

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• type 2 diabetes mellitus

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000286176 (HGNC:58722):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 9 uncertain in NM_006005.3
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WFS1	NM_006005.3	c.2080G>C	p.Glu694Gln	missense_variant	Exon 8 of 8	ENST00000226760.5	NP_005996.2
WFS1	NM_001145853.1	c.2080G>C	p.Glu694Gln	missense_variant	Exon 8 of 8		NP_001139325.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WFS1	ENST00000226760.5	c.2080G>C	p.Glu694Gln	missense_variant	Exon 8 of 8	1	NM_006005.3	ENSP00000226760.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 99

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 22, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Glu694Gln variant in WFS1 has not been previously reported in individuals with hearing loss and was absent from large population studies. Glutamic acid (G lu) at position 694 is not highly conserved in mammals, as guinea pigs carry a g lutamine (Gln), raising the possibility that this change may be tolerated. Addit ional computational prediction tools do not provide strong support for or agains t an impact to the protein. In summary, the clinical significance of the p.Glu69 4Gln variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.20	T;T
Eigen	Benign	0.13
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.86	.;D
M_CAP	Pathogenic	0.36	D
MetaRNN	Uncertain	0.54	D;D
MetaSVM	Uncertain	0.74	D
MutationAssessor	Uncertain	2.5	M;M
PhyloP100		6.3
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-1.5	N;N
REVEL	Pathogenic	0.65
Sift	Benign	0.035	D;D
Sift4G	Uncertain	0.019	D;D
Polyphen		0.036	B;B
Vest4		0.51
MutPred		0.41		Gain of MoRF binding (P = 0.0222);Gain of MoRF binding (P = 0.0222);
MVP		0.98
ClinPred		0.85	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.28
gMVP		0.83
Mutation Taster		=38/62	disease causing

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

Other links and lift over

dbSNP: rs727503751; hg19: chr4-6303602;